Applications Inverter Analysis
Hits：36322014-01-17 16:11:42
Some occasions inverter applications
1, the air conditioning load class
Office buildings, shopping malls and some supermarkets , factories have central air conditioning, a peak in the summer , air conditioning electricity consumption greatly. Hot weather , Beijing , Shanghai , Shenzhen and air conditioning electricity volume Zhanfeng electricity at above 40%. Thus with the inverter device , drag refrigeration pump air conditioning system , cooling water pump , fan is a very good power-saving technology. At present, there have been many companies specializing in energy-saving air-conditioning , which is the main inverter power saving technology .
2 , crusher class load
Metallurgy, mining, building materials applied many crusher, ball mill , after the class load with frequency effect is remarkable.
3 , a large kiln calciner class load
Metallurgy , building materials, caustic soda and other large industrial rotary kiln ( BOF ) before most of the DC commutator motors, slip motor , cascade control unit or intermediate speed . Since these speed mode or slip rings or inefficient , in recent years , many units with frequency control is very effective .
4, the compressor class load
Compressors also belong to the widely used class load . Low pressure compressors are widely used in various industrial sectors , the high-pressure compressor capacity in the steel ( such as oxygen ) , mining, fertilizers, ethylene has many applications. Frequency control , are brought starting current, saving , optimizing equipment life.
5 mill class load
In the metallurgical industry , the last large-scale multi- mill AC - AC inverter, in recent years, the use of AC - DC - AC inverter , the AC of the mill is a trend , especially at light loads mill, such as aluminum products plant in Ningxia national multi-rack aluminum rolling mill group to adopt a common drive to meet the low-frequency band set to start , synchronous operation between the rack , constant tension control , simple and reliable operation .
6 , hoist class load
Hoist class load frequency control , stable and reliable. Ironworks blast furnace ironmaking hoisting equipment is the main raw material conveying equipment. It requires Kai , smooth braking , acceleration and deceleration uniform, high reliability. The original multi-use Cascade , DC or rotor speed mode string resistance , low efficiency , poor reliability. AC inverter speed alternative to the above methods , you can achieve the desired results .
7 , class load converter
Class load converter , DC- AC inverter replacement unit is simple and reliable , stable operation.
8 , roller type load
Roller class load , mostly in iron and steel metallurgy industry , the use of variable frequency AC motor control, improve equipment reliability and stability.
9, the pump load
Pump load , wide range of large , including water pumps , oil pumps , chemical pumps, mud , sand pump , etc., there are low- medium and small capacity pumps also have a large capacity high-pressure pump .
Many water companies pump , chemical and fertilizer industries chemical pumps , reciprocating pumps, mud and other non-ferrous metals industry, frequency control , have produced very good results.
10 , cranes, dumpers class load
Cranes, dump trucks and other requirements of the load torque and smooth , positive and negative frequent and require reliable . Frequency device control cranes, dumpers can meet these requirements.
11 , drawing machine class load
Production of wire drawing machine , requiring high-speed, continuous production . Steel strength 200Kg/mm2, speed control system for high precision , high stability and requires synchronization.
12 , delivery vehicle class load
Coal mines or steel mills steel shipping car transport vehicles such as the use of inverter technology with good results. Start and stop quickly , overload, reversing the flexibility to reach the coal formation, weight properly ( much less installed equipment ) , basically does not require manual operations, improve coal production efficiency , saving energy.
13 , lift overhead tour class load
As the elevator is manned tool , drag the system requires highly reliable , but also frequent acceleration and deceleration and reversing , and improve the reliability of the dynamic characteristics of the elevator , the elevator ride side increased sense of security, comfort and efficiency. Past the elevator speed dc majority, in recent years, turning into AC Motor , both Japan and Germany. Many elevator factory in the country are scrambling to equip with VVVF elevator . Such as Shanghai Mitsubishi, Guangzhou Hitachi, Fujitsu , Qingdao , Tianjin Otis all adopts AC frequency control . Many of the original production of elevators were also frequency transformation .
14 , feeder class load
Metallurgy , electric power, coal, chemical and other industries, many feeder , regardless disc feeder or feeder, frequency control effects are very significant. Jilin Chemical Company dye sulfuric acid production line disc feeder , the original slip speed , low torque , low failure more often turn card . After the use of frequency control , because it is asynchronous machines, high reliability, energy saving, and more importantly, to ensure the accuracy of the closed-loop temperature transmitter transport of materials , and will not make excessive oxidant transport accidents caused by over-temperature , to ensure the production orderliness .
15 , stacker reclaimer class load
Stacker reclaimer coal fields , docks, mainly mining equipment Stacker materials , the main function is to stockpile and reclaimer . Automatic and semi-automatic stacker reclaimer , improve equipment reliability, equipment running smoothly without shock and shake phenomenon , reclaiming process by 1/cosφ law rotary speed , improved efficiency reclaimer bucket wheel turning and the belt of coal uniformity, popular workers welcome .
16 , fans load
Fans Load is wide range of large equipment , steel mills , power plants , nonferrous metals, mining, chemical , textile, chemical , cement, paper and other industries more applications. Most open baffle opening using regulation to regulate air flow , waste a lot of energy, frequency control , to saving and reduce mechanical wear , extend equipment life.
17 , blenders class load
Chemical and pharmaceutical industry mixer very much, replace other speed frequency control mode , the benefits of Trinidad and Tobago .
18 , spinning machine class load
Spinning process is complex , multi- station , requiring tension control , and some require position control. Frequency control to good effect.
19 , special power class load
Many power supplies, such as experimental power supply aircraft drag (400Hz) frequency devices are available to accomplish , the benefits are less investment and quick , small size, simple operation.
20 , paper machine class load
China's paper industry paper machine , requiring the use of high- precision multi- way SCR DC speed , some with slip motor , commutator motor. Because of the slip rings and carbon brushes causing reliability and accuracy. Resulting in paper machinery behind the general speed of 200m/min only about hard 2000m/min compared with abroad. Thus the frequency of the paper machine is the general trend .
21 loads of laundry equipment category
Larger hotel washing machine and ironing equipment in the past to use more mechanical governor or pole-changing speed, only to provide a speed or several speeds, the need for repeatedly laundry fabric is not ideal .
12 shows the residual content of this page
Frequency control , greatly improving the efficiency of the washing machine .
22 , a musical fountain class load
Very musical fountain to attract visitors , the level and quantity of water is by the size of its frequency control .
23 , grinders and other mechanical loads
High speed grinding spindle misses , the need for power is high frequency , there are 200Hz, 400Hz or 800Hz. Before the spindle motor power and more drag from the intermediate turbine. IF unit volume , low efficiency, noise and more poor accuracy .
24 , cigarette machine class load
Cigarettes imported cigarette machine industry in the past , whether or Moline Moline 8 0 , are not variable speed. Thus in the cigarette industry is mainly to solve the problem of variable speed and reliability , simple technology , the drive uses a simple , extremely effective .
25 , vibration and noise reduction type load
Many loads of noise , such as large air compressor, intermediate units and other large vibration . Inverter technology , vibration and noise reduction can be reached within standards.
26 , dyeing machine class load
Most dyeing machinery equipment units are multi joint work . Process requires the synchronous operation of each unit to maintain constant tension , and at the same linear velocity , otherwise cut cloth , wrapped fabric , color unevenness , color is not enough, the quality problems such as excessive shrinkage . Conventional printing machinery , or whether it is the way of the power sub- power mode are based on the DC drive system .
Because the current thinking about the shortcomings inherent in the printing industry gradually AC inverter technology . Rotary screen printing machine from the unit into the cloth , printing unit , Oven conduction band unit and drop cloth unit, speed control system are printing complex one. Frequency control forming speed chain control . Good synchronization performance , high precision , high reliability.
27 , injection molding machine class load
Plastic injection molding machine molding process is the key equipment , the quantity, large power consumption . Multi- saving way past through △ type ( triangle ) into Y -type ( star ) to saving for , the general effect . Frequency control does not change the original structure of the injection molding machine , several process control pump pressure or flow ( such as clamping , mold , plastic injection , holding pressure, mold , die back , etc.) , it can save 20% to 52 %, preferably replaces the previous way proportional throttle valves , a significant reduction in energy consumption, the Pearl River Delta have carried out a number of injection molding plant frequency transformation . The transformation of the injection molding machine , pay attention to mold acceleration, otherwise lower production, pay attention to the input and output of the harmonic interference of .
28 , sewage treatment and other environmental class load
Increasing emphasis on environmental protection , it is related to human survival environment. Ever since clean energy, green cities emerged. Inverter can be used in three areas of environmental class load. First, industrial wastewater treatment, two garbage power plant , three industrial smoke , exhaust, dust control .
29 , glass, ceramics , pharmaceuticals, beverages , food, packaging and other production line load
Glass , ceramics, pharmaceuticals, beverages , food, packaging and other production line adopts frequency control, have achieved good results.
30 , offshore oil platforms class load
Oil drilling AC motor speed control is much better than the DC speed , especially in the sand , dusty place, because reliable AC motor . Offshore oil drilling platform , requires frequency control devices .
31 , submersible pump class load
Submersible pump oil is one way of oilfield . Submersible pump in the well more than 1800m below the work , the majority of full -frequency pressure start , constant speed operation , has the following drawbacks :
? Starting current is too large, it will damage the motor insulation
? An impact torque , damage pump structure ;
? Suddenly a greater suction pump , sand easily inhaled , causing the card pumps. And no regulator systems and underground level fluctuations, resulting in voltage, current instability, so submersible motor over-excitation and under- excitation , causing malfunction .
32 , polyester chips class load
Polyester chips is one of the main products of petrochemical industry , due to the high precision frequency control , easy control of multiple control points , stable and reliable product quality and after use can increase the frequency control, bringing great benefits to the enterprise . Many companies are used in the expansion of frequency control technology .
12 shows the residual content of this page
Some occasions inverter applications
1, the air conditioning load class
Office buildings, shopping malls and some supermarkets , factories have central air conditioning, a peak in the summer , air conditioning electricity consumption greatly. Hot weather , Beijing , Shanghai , Shenzhen and air conditioning electricity volume Zhanfeng electricity at above 40%. Thus with the inverter device , drag refrigeration pump air conditioning system , cooling water pump , fan is a very good power-saving technology. At present, there have been many companies specializing in energy-saving air-conditioning , which is the main inverter power saving technology .
2 , crusher class load
Metallurgy, mining, building materials applied many crusher, ball mill , after the class load with frequency effect is remarkable.
3 , a large kiln calciner class load
Metallurgy , building materials, caustic soda and other large industrial rotary kiln ( BOF ) before most of the DC commutator motors, slip motor , cascade control unit or intermediate speed . Since these speed mode or slip rings or inefficient , in recent years , many units with frequency control is very effective .
4, the compressor class load
Compressors also belong to the widely used class load . Low pressure compressors are widely used in various industrial sectors , the high-pressure compressor capacity in the steel ( such as oxygen ) , mining, fertilizers, ethylene has many applications. Frequency control , are brought starting current, saving , optimizing equipment life.
5 mill class load
In the metallurgical industry , the last large-scale multi- mill AC - AC inverter, in recent years, the use of AC - DC - AC inverter , the AC of the mill is a trend , especially at light loads mill, such as aluminum products plant in Ningxia national multi-rack aluminum rolling mill group to adopt a common drive to meet the low-frequency band set to start , synchronous operation between the rack , constant tension control , simple and reliable operation .
6 , hoist class load
Hoist class load frequency control , stable and reliable. Ironworks blast furnace ironmaking hoisting equipment is the main raw material conveying equipment. It requires Kai , smooth braking , acceleration and deceleration uniform, high reliability. The original multi-use Cascade , DC or rotor speed mode string resistance , low efficiency , poor reliability. AC inverter speed alternative to the above methods , you can achieve the desired results .
7 , class load converter
Class load converter , DC- AC inverter replacement unit is simple and reliable , stable operation.
8 , roller type load
Roller class load , mostly in iron and steel metallurgy industry , the use of variable frequency AC motor control, improve equipment reliability and stability.
9, the pump load
Pump load , wide range of large , including water pumps , oil pumps , chemical pumps, mud , sand pump , etc., there are low- medium and small capacity pumps also have a large capacity high-pressure pump .
Many water companies pump , chemical and fertilizer industries chemical pumps , reciprocating pumps, mud and other non-ferrous metals industry, frequency control , have produced very good results.
10 , cranes, dumpers class load
Cranes, dump trucks and other requirements of the load torque and smooth , positive and negative frequent and require reliable . Frequency device control cranes, dumpers can meet these requirements.
11 , drawing machine class load
Production of wire drawing machine , requiring high-speed, continuous production . Steel strength 200Kg/mm2, speed control system for high precision , high stability and requires synchronization.
12 , delivery vehicle class load
Coal mines or steel mills steel shipping car transport vehicles such as the use of inverter technology with good results. Start and stop quickly , overload, reversing the flexibility to reach the coal formation, weight properly ( much less installed equipment ) , basically does not require manual operations, improve coal production efficiency , saving energy.
13 , lift overhead tour class load
As the elevator is manned tool , drag the system requires highly reliable , but also frequent acceleration and deceleration and reversing , and improve the reliability of the dynamic characteristics of the elevator , the elevator ride side increased sense of security, comfort and efficiency. Past the elevator speed dc majority, in recent years, turning into AC Motor , both Japan and Germany. Many elevator factory in the country are scrambling to equip with VVVF elevator . Such as Shanghai Mitsubishi, Guangzhou Hitachi, Fujitsu , Qingdao , Tianjin Otis all adopts AC frequency control . Many of the original production of elevators were also frequency transformation .
14 , feeder class load
Metallurgy , electric power, coal, chemical and other industries, many feeder , regardless disc feeder or feeder, frequency control effects are very significant. Jilin Chemical Company dye sulfuric acid production line disc feeder , the original slip speed , low torque , low failure more often turn card . After the use of frequency control , because it is asynchronous machines, high reliability, energy saving, and more importantly, to ensure the accuracy of the closed-loop temperature transmitter transport of materials , and will not make excessive oxidant transport accidents caused by over-temperature , to ensure the production orderliness .
15 , stacker reclaimer class load
Stacker reclaimer coal fields , docks, mainly mining equipment Stacker materials , the main function is to stockpile and reclaimer . Automatic and semi-automatic stacker reclaimer , improve equipment reliability, equipment running smoothly without shock and shake phenomenon , reclaiming process by 1/cosφ law rotary speed , improved efficiency reclaimer bucket wheel turning and the belt of coal uniformity, popular workers welcome .
16 , fans load
Fans Load is wide range of large equipment , steel mills , power plants , nonferrous metals, mining, chemical , textile, chemical , cement, paper and other industries more applications. Most open baffle opening using regulation to regulate air flow , waste a lot of energy, frequency control , to saving and reduce mechanical wear , extend equipment life.
17 , blenders class load
Chemical and pharmaceutical industry mixer very much, replace other speed frequency control mode , the benefits of Trinidad and Tobago .
18 , spinning machine class load
Spinning process is complex , multi- station , requiring tension control , and some require position control. Frequency control to good effect.
19 , special power class load
Many power supplies, such as experimental power supply aircraft drag (400Hz) frequency devices are available to accomplish , the benefits are less investment and quick , small size, simple operation.
20 , paper machine class load
China's paper industry paper machine , requiring the use of high- precision multi- way SCR DC speed , some with slip motor , commutator motor. Because of the slip rings and carbon brushes causing reliability and accuracy. Resulting in paper machinery behind the general speed of 200m/min only about hard 2000m/min compared with abroad. Thus the frequency of the paper machine is the general trend .
21 loads of laundry equipment category
Larger hotel washing machine and ironing equipment in the past to use more mechanical governor or pole-changing speed, only to provide a speed or several speeds, the need for repeatedly laundry fabric is not ideal .
Frequency control , greatly improving the efficiency of the washing machine .
22 , a musical fountain class load
Very musical fountain to attract visitors , the level and quantity of water is by the size of its frequency control .
23 , grinders and other mechanical loads
High speed grinding spindle misses , the need for power is high frequency , there are 200Hz, 400Hz or 800Hz. Before the spindle motor power and more drag from the intermediate turbine. IF unit volume , low efficiency, noise and more poor accuracy .
24 , cigarette machine class load
Cigarettes imported cigarette machine industry in the past , whether or Moline Moline 8 0 , are not variable speed. Thus in the cigarette industry is mainly to solve the problem of variable speed and reliability , simple technology , the drive uses a simple , extremely effective .
25 , vibration and noise reduction type load
Many loads of noise , such as large air compressor, intermediate units and other large vibration . Inverter technology , vibration and noise reduction can be reached within standards.
26 , dyeing machine class load
Most dyeing machinery equipment units are multi joint work . Process requires the synchronous operation of each unit to maintain constant tension , and at the same linear velocity , otherwise cut cloth , wrapped fabric , color unevenness , color is not enough, the quality problems such as excessive shrinkage . Conventional printing machinery , or whether it is the way of the power sub- power mode are based on the DC drive system .
Because the current thinking about the shortcomings inherent in the printing industry gradually AC inverter technology . Rotary screen printing machine from the unit into the cloth , printing unit , Oven conduction band unit and drop cloth unit, speed control system are printing complex one. Frequency control forming speed chain control . Good synchronization performance , high precision , high reliability.
27 , injection molding machine class load
Plastic injection molding machine molding process is the key equipment , the quantity, large power consumption . Multi- saving way past through △ type ( triangle ) into Y -type ( star ) to saving for , the general effect . Frequency control does not change the original structure of the injection molding machine , several process control pump pressure or flow ( such as clamping , mold , plastic injection , holding pressure, mold , die back , etc.) , it can save 20% to 52 %, preferably replaces the previous way proportional throttle valves , a significant reduction in energy consumption, the Pearl River Delta have carried out a number of injection molding plant frequency transformation . The transformation of the injection molding machine , pay attention to mold acceleration, otherwise lower production, pay attention to the input and output of the harmonic interference of .
28 , sewage treatment and other environmental class load
Increasing emphasis on environmental protection , it is related to human survival environment. Ever since clean energy, green cities emerged. Inverter can be used in three areas of environmental class load. First, industrial wastewater treatment, two garbage power plant , three industrial smoke , exhaust, dust control .
29 , glass, ceramics , pharmaceuticals, beverages , food, packaging and other production line load
Glass , ceramics, pharmaceuticals, beverages , food, packaging and other production line adopts frequency control, have achieved good results.
30 , offshore oil platforms class load
Oil drilling AC motor speed control is much better than the DC speed , especially in the sand , dusty place, because reliable AC motor . Offshore oil drilling platform , requires frequency control devices .
31 , submersible pump class load
Submersible pump oil is one way of oilfield . Submersible pump in the well more than 1800m below the work , the majority of full -frequency pressure start , constant speed operation , has the following drawbacks :
Starting current is too large, it will damage the motor insulation
An impact torque , damage pump structure ;
Suddenly a greater suction pump , sand easily inhaled , causing the card pumps. And no regulator systems and underground level fluctuations, resulting in voltage, current instability, so submersible motor over-excitation and under- excitation , causing malfunction .
32 , polyester chips class load
Polyester chips is one of the main products of petrochemical industry , due to the high precision frequency control , easy control of multiple control points , stable and reliable product quality and after use can increase the frequency control, bringing great benefits to the enterprise . Many companies are used in the expansion of frequency control technology .
1, the air conditioning load class
Office buildings, shopping malls and some supermarkets , factories have central air conditioning, a peak in the summer , air conditioning electricity consumption greatly. Hot weather , Beijing , Shanghai , Shenzhen and air conditioning electricity volume Zhanfeng electricity at above 40%. Thus with the inverter device , drag refrigeration pump air conditioning system , cooling water pump , fan is a very good power-saving technology. At present, there have been many companies specializing in energy-saving air-conditioning , which is the main inverter power saving technology .
2 , crusher class load
Metallurgy, mining, building materials applied many crusher, ball mill , after the class load with frequency effect is remarkable.
3 , a large kiln calciner class load
Metallurgy , building materials, caustic soda and other large industrial rotary kiln ( BOF ) before most of the DC commutator motors, slip motor , cascade control unit or intermediate speed . Since these speed mode or slip rings or inefficient , in recent years , many units with frequency control is very effective .
4, the compressor class load
Compressors also belong to the widely used class load . Low pressure compressors are widely used in various industrial sectors , the high-pressure compressor capacity in the steel ( such as oxygen ) , mining, fertilizers, ethylene has many applications. Frequency control , are brought starting current, saving , optimizing equipment life.
5 mill class load
In the metallurgical industry , the last large-scale multi- mill AC - AC inverter, in recent years, the use of AC - DC - AC inverter , the AC of the mill is a trend , especially at light loads mill, such as aluminum products plant in Ningxia national multi-rack aluminum rolling mill group to adopt a common drive to meet the low-frequency band set to start , synchronous operation between the rack , constant tension control , simple and reliable operation .
6 , hoist class load
Hoist class load frequency control , stable and reliable. Ironworks blast furnace ironmaking hoisting equipment is the main raw material conveying equipment. It requires Kai , smooth braking , acceleration and deceleration uniform, high reliability. The original multi-use Cascade , DC or rotor speed mode string resistance , low efficiency , poor reliability. AC inverter speed alternative to the above methods , you can achieve the desired results .
7 , class load converter
Class load converter , DC- AC inverter replacement unit is simple and reliable , stable operation.
8 , roller type load
Roller class load , mostly in iron and steel metallurgy industry , the use of variable frequency AC motor control, improve equipment reliability and stability.
9, the pump load
Pump load , wide range of large , including water pumps , oil pumps , chemical pumps, mud , sand pump , etc., there are low- medium and small capacity pumps also have a large capacity high-pressure pump .
Many water companies pump , chemical and fertilizer industries chemical pumps , reciprocating pumps, mud and other non-ferrous metals industry, frequency control , have produced very good results.
10 , cranes, dumpers class load
Cranes, dump trucks and other requirements of the load torque and smooth , positive and negative frequent and require reliable . Frequency device control cranes, dumpers can meet these requirements.
11 , drawing machine class load
Production of wire drawing machine , requiring high-speed, continuous production . Steel strength 200Kg/mm2, speed control system for high precision , high stability and requires synchronization.
12 , delivery vehicle class load
Coal mines or steel mills steel shipping car transport vehicles such as the use of inverter technology with good results. Start and stop quickly , overload, reversing the flexibility to reach the coal formation, weight properly ( much less installed equipment ) , basically does not require manual operations, improve coal production efficiency , saving energy.
13 , lift overhead tour class load
As the elevator is manned tool , drag the system requires highly reliable , but also frequent acceleration and deceleration and reversing , and improve the reliability of the dynamic characteristics of the elevator , the elevator ride side increased sense of security, comfort and efficiency. Past the elevator speed dc majority, in recent years, turning into AC Motor , both Japan and Germany. Many elevator factory in the country are scrambling to equip with VVVF elevator . Such as Shanghai Mitsubishi, Guangzhou Hitachi, Fujitsu , Qingdao , Tianjin Otis all adopts AC frequency control . Many of the original production of elevators were also frequency transformation .
14 , feeder class load
Metallurgy , electric power, coal, chemical and other industries, many feeder , regardless disc feeder or feeder, frequency control effects are very significant. Jilin Chemical Company dye sulfuric acid production line disc feeder , the original slip speed , low torque , low failure more often turn card . After the use of frequency control , because it is asynchronous machines, high reliability, energy saving, and more importantly, to ensure the accuracy of the closed-loop temperature transmitter transport of materials , and will not make excessive oxidant transport accidents caused by over-temperature , to ensure the production orderliness .
15 , stacker reclaimer class load
Stacker reclaimer coal fields , docks, mainly mining equipment Stacker materials , the main function is to stockpile and reclaimer . Automatic and semi-automatic stacker reclaimer , improve equipment reliability, equipment running smoothly without shock and shake phenomenon , reclaiming process by 1/cosφ law rotary speed , improved efficiency reclaimer bucket wheel turning and the belt of coal uniformity, popular workers welcome .
16 , fans load
Fans Load is wide range of large equipment , steel mills , power plants , nonferrous metals, mining, chemical , textile, chemical , cement, paper and other industries more applications. Most open baffle opening using regulation to regulate air flow , waste a lot of energy, frequency control , to saving and reduce mechanical wear , extend equipment life.
17 , blenders class load
Chemical and pharmaceutical industry mixer very much, replace other speed frequency control mode , the benefits of Trinidad and Tobago .
18 , spinning machine class load
Spinning process is complex , multi- station , requiring tension control , and some require position control. Frequency control to good effect.
19 , special power class load
Many power supplies, such as experimental power supply aircraft drag (400Hz) frequency devices are available to accomplish , the benefits are less investment and quick , small size, simple operation.
20 , paper machine class load
China's paper industry paper machine , requiring the use of high- precision multi- way SCR DC speed , some with slip motor , commutator motor. Because of the slip rings and carbon brushes causing reliability and accuracy. Resulting in paper machinery behind the general speed of 200m/min only about hard 2000m/min compared with abroad. Thus the frequency of the paper machine is the general trend .
21 loads of laundry equipment category
Larger hotel washing machine and ironing equipment in the past to use more mechanical governor or pole-changing speed, only to provide a speed or several speeds, the need for repeatedly laundry fabric is not ideal .
12 shows the residual content of this page
Frequency control , greatly improving the efficiency of the washing machine .
22 , a musical fountain class load
Very musical fountain to attract visitors , the level and quantity of water is by the size of its frequency control .
23 , grinders and other mechanical loads
High speed grinding spindle misses , the need for power is high frequency , there are 200Hz, 400Hz or 800Hz. Before the spindle motor power and more drag from the intermediate turbine. IF unit volume , low efficiency, noise and more poor accuracy .
24 , cigarette machine class load
Cigarettes imported cigarette machine industry in the past , whether or Moline Moline 8 0 , are not variable speed. Thus in the cigarette industry is mainly to solve the problem of variable speed and reliability , simple technology , the drive uses a simple , extremely effective .
25 , vibration and noise reduction type load
Many loads of noise , such as large air compressor, intermediate units and other large vibration . Inverter technology , vibration and noise reduction can be reached within standards.
26 , dyeing machine class load
Most dyeing machinery equipment units are multi joint work . Process requires the synchronous operation of each unit to maintain constant tension , and at the same linear velocity , otherwise cut cloth , wrapped fabric , color unevenness , color is not enough, the quality problems such as excessive shrinkage . Conventional printing machinery , or whether it is the way of the power sub- power mode are based on the DC drive system .
Because the current thinking about the shortcomings inherent in the printing industry gradually AC inverter technology . Rotary screen printing machine from the unit into the cloth , printing unit , Oven conduction band unit and drop cloth unit, speed control system are printing complex one. Frequency control forming speed chain control . Good synchronization performance , high precision , high reliability.
27 , injection molding machine class load
Plastic injection molding machine molding process is the key equipment , the quantity, large power consumption . Multi- saving way past through △ type ( triangle ) into Y -type ( star ) to saving for , the general effect . Frequency control does not change the original structure of the injection molding machine , several process control pump pressure or flow ( such as clamping , mold , plastic injection , holding pressure, mold , die back , etc.) , it can save 20% to 52 %, preferably replaces the previous way proportional throttle valves , a significant reduction in energy consumption, the Pearl River Delta have carried out a number of injection molding plant frequency transformation . The transformation of the injection molding machine , pay attention to mold acceleration, otherwise lower production, pay attention to the input and output of the harmonic interference of .
28 , sewage treatment and other environmental class load
Increasing emphasis on environmental protection , it is related to human survival environment. Ever since clean energy, green cities emerged. Inverter can be used in three areas of environmental class load. First, industrial wastewater treatment, two garbage power plant , three industrial smoke , exhaust, dust control .
29 , glass, ceramics , pharmaceuticals, beverages , food, packaging and other production line load
Glass , ceramics, pharmaceuticals, beverages , food, packaging and other production line adopts frequency control, have achieved good results.
30 , offshore oil platforms class load
Oil drilling AC motor speed control is much better than the DC speed , especially in the sand , dusty place, because reliable AC motor . Offshore oil drilling platform , requires frequency control devices .
31 , submersible pump class load
Submersible pump oil is one way of oilfield . Submersible pump in the well more than 1800m below the work , the majority of full -frequency pressure start , constant speed operation , has the following drawbacks :
? Starting current is too large, it will damage the motor insulation
? An impact torque , damage pump structure ;
? Suddenly a greater suction pump , sand easily inhaled , causing the card pumps. And no regulator systems and underground level fluctuations, resulting in voltage, current instability, so submersible motor over-excitation and under- excitation , causing malfunction .
32 , polyester chips class load
Polyester chips is one of the main products of petrochemical industry , due to the high precision frequency control , easy control of multiple control points , stable and reliable product quality and after use can increase the frequency control, bringing great benefits to the enterprise . Many companies are used in the expansion of frequency control technology .
12 shows the residual content of this page
Some occasions inverter applications
1, the air conditioning load class
Office buildings, shopping malls and some supermarkets , factories have central air conditioning, a peak in the summer , air conditioning electricity consumption greatly. Hot weather , Beijing , Shanghai , Shenzhen and air conditioning electricity volume Zhanfeng electricity at above 40%. Thus with the inverter device , drag refrigeration pump air conditioning system , cooling water pump , fan is a very good power-saving technology. At present, there have been many companies specializing in energy-saving air-conditioning , which is the main inverter power saving technology .
2 , crusher class load
Metallurgy, mining, building materials applied many crusher, ball mill , after the class load with frequency effect is remarkable.
3 , a large kiln calciner class load
Metallurgy , building materials, caustic soda and other large industrial rotary kiln ( BOF ) before most of the DC commutator motors, slip motor , cascade control unit or intermediate speed . Since these speed mode or slip rings or inefficient , in recent years , many units with frequency control is very effective .
4, the compressor class load
Compressors also belong to the widely used class load . Low pressure compressors are widely used in various industrial sectors , the high-pressure compressor capacity in the steel ( such as oxygen ) , mining, fertilizers, ethylene has many applications. Frequency control , are brought starting current, saving , optimizing equipment life.
5 mill class load
In the metallurgical industry , the last large-scale multi- mill AC - AC inverter, in recent years, the use of AC - DC - AC inverter , the AC of the mill is a trend , especially at light loads mill, such as aluminum products plant in Ningxia national multi-rack aluminum rolling mill group to adopt a common drive to meet the low-frequency band set to start , synchronous operation between the rack , constant tension control , simple and reliable operation .
6 , hoist class load
Hoist class load frequency control , stable and reliable. Ironworks blast furnace ironmaking hoisting equipment is the main raw material conveying equipment. It requires Kai , smooth braking , acceleration and deceleration uniform, high reliability. The original multi-use Cascade , DC or rotor speed mode string resistance , low efficiency , poor reliability. AC inverter speed alternative to the above methods , you can achieve the desired results .
7 , class load converter
Class load converter , DC- AC inverter replacement unit is simple and reliable , stable operation.
8 , roller type load
Roller class load , mostly in iron and steel metallurgy industry , the use of variable frequency AC motor control, improve equipment reliability and stability.
9, the pump load
Pump load , wide range of large , including water pumps , oil pumps , chemical pumps, mud , sand pump , etc., there are low- medium and small capacity pumps also have a large capacity high-pressure pump .
Many water companies pump , chemical and fertilizer industries chemical pumps , reciprocating pumps, mud and other non-ferrous metals industry, frequency control , have produced very good results.
10 , cranes, dumpers class load
Cranes, dump trucks and other requirements of the load torque and smooth , positive and negative frequent and require reliable . Frequency device control cranes, dumpers can meet these requirements.
11 , drawing machine class load
Production of wire drawing machine , requiring high-speed, continuous production . Steel strength 200Kg/mm2, speed control system for high precision , high stability and requires synchronization.
12 , delivery vehicle class load
Coal mines or steel mills steel shipping car transport vehicles such as the use of inverter technology with good results. Start and stop quickly , overload, reversing the flexibility to reach the coal formation, weight properly ( much less installed equipment ) , basically does not require manual operations, improve coal production efficiency , saving energy.
13 , lift overhead tour class load
As the elevator is manned tool , drag the system requires highly reliable , but also frequent acceleration and deceleration and reversing , and improve the reliability of the dynamic characteristics of the elevator , the elevator ride side increased sense of security, comfort and efficiency. Past the elevator speed dc majority, in recent years, turning into AC Motor , both Japan and Germany. Many elevator factory in the country are scrambling to equip with VVVF elevator . Such as Shanghai Mitsubishi, Guangzhou Hitachi, Fujitsu , Qingdao , Tianjin Otis all adopts AC frequency control . Many of the original production of elevators were also frequency transformation .
14 , feeder class load
Metallurgy , electric power, coal, chemical and other industries, many feeder , regardless disc feeder or feeder, frequency control effects are very significant. Jilin Chemical Company dye sulfuric acid production line disc feeder , the original slip speed , low torque , low failure more often turn card . After the use of frequency control , because it is asynchronous machines, high reliability, energy saving, and more importantly, to ensure the accuracy of the closed-loop temperature transmitter transport of materials , and will not make excessive oxidant transport accidents caused by over-temperature , to ensure the production orderliness .
15 , stacker reclaimer class load
Stacker reclaimer coal fields , docks, mainly mining equipment Stacker materials , the main function is to stockpile and reclaimer . Automatic and semi-automatic stacker reclaimer , improve equipment reliability, equipment running smoothly without shock and shake phenomenon , reclaiming process by 1/cosφ law rotary speed , improved efficiency reclaimer bucket wheel turning and the belt of coal uniformity, popular workers welcome .
16 , fans load
Fans Load is wide range of large equipment , steel mills , power plants , nonferrous metals, mining, chemical , textile, chemical , cement, paper and other industries more applications. Most open baffle opening using regulation to regulate air flow , waste a lot of energy, frequency control , to saving and reduce mechanical wear , extend equipment life.
17 , blenders class load
Chemical and pharmaceutical industry mixer very much, replace other speed frequency control mode , the benefits of Trinidad and Tobago .
18 , spinning machine class load
Spinning process is complex , multi- station , requiring tension control , and some require position control. Frequency control to good effect.
19 , special power class load
Many power supplies, such as experimental power supply aircraft drag (400Hz) frequency devices are available to accomplish , the benefits are less investment and quick , small size, simple operation.
20 , paper machine class load
China's paper industry paper machine , requiring the use of high- precision multi- way SCR DC speed , some with slip motor , commutator motor. Because of the slip rings and carbon brushes causing reliability and accuracy. Resulting in paper machinery behind the general speed of 200m/min only about hard 2000m/min compared with abroad. Thus the frequency of the paper machine is the general trend .
21 loads of laundry equipment category
Larger hotel washing machine and ironing equipment in the past to use more mechanical governor or pole-changing speed, only to provide a speed or several speeds, the need for repeatedly laundry fabric is not ideal .
Frequency control , greatly improving the efficiency of the washing machine .
22 , a musical fountain class load
Very musical fountain to attract visitors , the level and quantity of water is by the size of its frequency control .
23 , grinders and other mechanical loads
High speed grinding spindle misses , the need for power is high frequency , there are 200Hz, 400Hz or 800Hz. Before the spindle motor power and more drag from the intermediate turbine. IF unit volume , low efficiency, noise and more poor accuracy .
24 , cigarette machine class load
Cigarettes imported cigarette machine industry in the past , whether or Moline Moline 8 0 , are not variable speed. Thus in the cigarette industry is mainly to solve the problem of variable speed and reliability , simple technology , the drive uses a simple , extremely effective .
25 , vibration and noise reduction type load
Many loads of noise , such as large air compressor, intermediate units and other large vibration . Inverter technology , vibration and noise reduction can be reached within standards.
26 , dyeing machine class load
Most dyeing machinery equipment units are multi joint work . Process requires the synchronous operation of each unit to maintain constant tension , and at the same linear velocity , otherwise cut cloth , wrapped fabric , color unevenness , color is not enough, the quality problems such as excessive shrinkage . Conventional printing machinery , or whether it is the way of the power sub- power mode are based on the DC drive system .
Because the current thinking about the shortcomings inherent in the printing industry gradually AC inverter technology . Rotary screen printing machine from the unit into the cloth , printing unit , Oven conduction band unit and drop cloth unit, speed control system are printing complex one. Frequency control forming speed chain control . Good synchronization performance , high precision , high reliability.
27 , injection molding machine class load
Plastic injection molding machine molding process is the key equipment , the quantity, large power consumption . Multi- saving way past through △ type ( triangle ) into Y -type ( star ) to saving for , the general effect . Frequency control does not change the original structure of the injection molding machine , several process control pump pressure or flow ( such as clamping , mold , plastic injection , holding pressure, mold , die back , etc.) , it can save 20% to 52 %, preferably replaces the previous way proportional throttle valves , a significant reduction in energy consumption, the Pearl River Delta have carried out a number of injection molding plant frequency transformation . The transformation of the injection molding machine , pay attention to mold acceleration, otherwise lower production, pay attention to the input and output of the harmonic interference of .
28 , sewage treatment and other environmental class load
Increasing emphasis on environmental protection , it is related to human survival environment. Ever since clean energy, green cities emerged. Inverter can be used in three areas of environmental class load. First, industrial wastewater treatment, two garbage power plant , three industrial smoke , exhaust, dust control .
29 , glass, ceramics , pharmaceuticals, beverages , food, packaging and other production line load
Glass , ceramics, pharmaceuticals, beverages , food, packaging and other production line adopts frequency control, have achieved good results.
30 , offshore oil platforms class load
Oil drilling AC motor speed control is much better than the DC speed , especially in the sand , dusty place, because reliable AC motor . Offshore oil drilling platform , requires frequency control devices .
31 , submersible pump class load
Submersible pump oil is one way of oilfield . Submersible pump in the well more than 1800m below the work , the majority of full -frequency pressure start , constant speed operation , has the following drawbacks :
Starting current is too large, it will damage the motor insulation
An impact torque , damage pump structure ;
Suddenly a greater suction pump , sand easily inhaled , causing the card pumps. And no regulator systems and underground level fluctuations, resulting in voltage, current instability, so submersible motor over-excitation and under- excitation , causing malfunction .
32 , polyester chips class load
Polyester chips is one of the main products of petrochemical industry , due to the high precision frequency control , easy control of multiple control points , stable and reliable product quality and after use can increase the frequency control, bringing great benefits to the enterprise . Many companies are used in the expansion of frequency control technology .