Dec 05, 2020
How many do you know about the 32 fields of inverter application?
1 Air conditioning load
In summer, shopping malls, shopping malls, and office buildings use a lot of electricity. In hot weather, air-conditioning electricity consumption in Beijing, Shanghai, and Shenzhen accounts for more than 40% of peak electricity consumption. Therefore, using frequency conversion devices to drive the refrigeration pump, cold water pump and fan of the air conditioning system is a good energy-saving technology. At present, there are many companies specializing in air-conditioning electricity in my country, and the main technology is frequency conversion speed regulation.
2 crusher load
Many crushers and ball mills are used in metallurgical mines, building materials and other industries, and the effect after frequency conversion is significant.
three. Large kiln calciner load
In the past, large-scale industrial rotary kilns (converters) such as metallurgy, building materials, and caustic soda used DC, commutator, slip motor, cascade speed regulation or intermediate frequency unit speed regulation. In recent years, many units have adopted frequency conversion control with good results.
4 Compressor load
Compressors are also widely used loads. Low-pressure compressors are widely used in various industrial sectors, and high-pressure large-capacity compressors are widely used in steel (such as oxygen generators), mining, fertilizers, ethylene and other industries. Using frequency conversion speed regulation, it has the advantages of low starting current, energy saving and optimized equipment life.
5 Mill load
In the metallurgical industry, large-scale rolling mills used AC-DC-AC inverters in the past. In recent years, AC-DC-AC converters have been used in large rolling mills. AC-DC-AC inverters have been applied to light-load rolling mills, such as the multi-stand aluminum rolling mill of Ningxia Aluminum Products Factory, which can meet the requirements of low-frequency load start, synchronous operation between stands, constant tension control, simple and reliable operation.
6 hoist load
The hoisting load adopts frequency conversion speed regulation, which is stable and reliable. The blast furnace hoisting equipment of the ironworks is the main conveying equipment for ironmaking raw materials. It requires stable starting and braking, uniform acceleration and deceleration, and high reliability. In the past, cascade, DC or rotor series resistance speed regulation methods were used, which had low efficiency and poor reliability. Using AC frequency converter instead of the above speed regulation method can obtain ideal speed regulation effect.
7 Inverter load
The commutation load adopts AC frequency conversion instead of DC unit, which is simple, reliable and stable.
8 roller load
Drum loads, mostly in the steel industry, adopt AC motor frequency conversion control, which can improve the reliability and stability of the equipment.
9 pump load
The pump has a large load, a large volume, and a wide range, including water pumps, oil pumps, chemical pumps, mud pumps, sand pumps, etc. There are low pressure medium and small capacity pumps, and high pressure large capacity pumps.
Water supply companies, fertilizer industry, reciprocating pumps, non-ferrous metal slurry pumps and other industries mostly use variable frequency speed regulation for water pumps, which have achieved good results.
10 Crane and dump truck loads
Cranes, dump trucks and other load torques are large, require stability, and reliable positive and negative frequencies. Frequency conversion devices can control cranes and dump trucks to meet these requirements.
11 Wire drawing machine load
Wire drawing machines that produce steel wires require high-speed continuous production. The steel wire strength is 200kg/mm2, and the speed control system requires high precision, high stability and synchronization.
12 Transport vehicle load
The results show that the frequency conversion speed regulation technology is very effective in coal mines or steel plants. It has fast start and stop, strong overload capacity, flexible forward and reverse rotation, smooth coal surface, correct weight (not more or less), and basically does not require manual operation, which improves the production efficiency of raw coal and saves electricity.
13 Elevator overhead coach load
Since the elevator is a manned tool, it requires the drive system to have high reliability, and it also requires frequent acceleration and deceleration and forward and reverse rotation. The improvement of elevator dynamic characteristics and reliability improves the safety, comfort and efficiency of elevators. In the past, most elevators used DC speed control. In recent years, it has gradually changed to AC motor frequency control, whether in Japan or Germany. Many elevator factories in our country are scrambling to equip elevators with frequency conversion speed regulation. For example, Shanghai Mitsubishi, Guangzhou Hitachi, Qingdao Fuji, Tianjin Otis, etc. all adopt AC frequency conversion speed control. Many elevators originally produced have also undergone frequency conversion transformation.
14 Feeder load
There are many feeders in metallurgy, electric power, coal, chemical and other industries. Whether it is a pan feeder or a vibrating feeder, the effect of frequency conversion speed regulation is very significant. The disc feeder of the sulphuric acid production line of Jihua Dyestuff Factory adopts slip speed regulation, with small low-frequency torque, many faults and frequent blockages. After adopting variable frequency speed regulation, because it is an asynchronous motor, it has high reliability and energy saving. More importantly, it is closed loop with the temperature transmitter to ensure the accuracy of material transportation, avoid accidents caused by excessively high oxidant transportation temperature, and ensure orderly production.
15 stacker reclaimer type load
Stacker-reclaimer is the main equipment for stacking materials in coal yards, docks, and mines. Its main function is stacking and recycling. Realize automatic stacking and semi-automatic reclaiming. Improve the reliability of the equipment. The equipment runs smoothly, without impact or shaking. Adjust according to φ1 recycling process. Improved bucket wheel rotation reclaiming efficiency and improved belt coal transportation uniformity. It is very popular with workers.
16 fan load
Fans are equipment with a large load and are widely used in steel mills, power plants, non-ferrous metals, mining, chemical, textile, chemical fiber, cement, paper and other industries. Most of them use adjustable baffle opening to adjust the air volume, wasting a lot of electricity. Frequency conversion speed regulation can save electricity, reduce mechanical wear and extend equipment life.
17 Mixer load
There are many mixers in the chemical and pharmaceutical industries. There are many advantages to using frequency conversion speed control instead of other speed control methods.
18 Spinning machine load
The spinning process is complicated, there are many stations, tension control is required, and some stations require position control. The frequency conversion speed regulation effect is good.
19 special electric load
Various power supplies such as experimental power supply and aircraft drag power supply (400Hz) can be completed by frequency conversion devices. It has the advantages of low investment, quick effect, small size, simple operation and so on.
20 paper machine load
my country's paper industry has high requirements for paper machine accuracy, and most of them use SCR DC speed regulation, and some use slip motors and commutator motors. Due to the existence of slip rings and carbon brushes, their reliability and accuracy are not high. This has led to the backwardness of papermaking machinery. The general speed is only about 200m/min, which is difficult to compare with 2000m/min abroad. Therefore, paper machine frequency conversion speed regulation is the general trend.
21 Load of laundry equipment
In the past, washing machines and ironing equipment in large hotels used mechanical speed regulation or pole-changing speed regulation, and could only provide one or a few speeds, which is not ideal for fabrics that need to be washed and ironed repeatedly. Using frequency conversion speed control, the efficiency of the washing machine is greatly improved.
22 music fountain load
The water level and volume of the musical fountain are controlled by frequency conversion, which is very attractive to tourists.
23 Grinding machine and other mechanical loads
The spindle speed of the grinder is very high, and the power frequency is also very high, including 200Hz, 400Hz or even 800Hz. In the past, the power supply of the spindle motor was mostly driven by an intermediate frequency generator set. The intermediate frequency unit is large in size, low in efficiency, high in noise, and poor in accuracy.
24 cigarette machine load
In the past, imported cigarette machines, whether it was Molin No. 8 or Molin No. 0, were not stepless speed regulation. Therefore, in the cigarette industry, it is mainly to solve the problem of stepless speed regulation and reliability. The technology is simple, the inverter is simple to use, and the effect is great.
25 Vibration and noise reduction load
Many loads, such as large air compressors, intermediate frequency units, etc., have greater noise and vibration. Frequency conversion technology can reduce vibration and noise to reach the standard.
26 Dyeing machine load
Most printing and dyeing machinery is multi-unit equipment. During this process, all units are required to run synchronously at the same linear speed and keep the tension constant. Otherwise, quality problems such as broken cloth, wrapping cloth, uneven color, insufficient color, and excessive shrinkage will occur. In the past, the common power supply mode and sub-power supply mode of printing and dyeing machinery used DC speed control system.
Due to the inherent shortcomings of direct current, the printing and dyeing industry has gradually adopted AC frequency conversion technology. The rotary screen printing machine is composed of a cloth feeding unit, a printing unit, a drying room guide belt unit and a cloth drop unit, and belongs to a complex printing and dyeing speed control system. The speed chain is controlled by frequency conversion. Good synchronization performance, high precision and high reliability.
27 Injection molding machine load
Injection molding machines are the key equipment for plastic processing and molding, with large quantities and high power consumption. Most of the previous energy-saving methods have changed from delta type (triangle type) to Y type (star type), and the effect is average. The pressure of the original injection molding machine can be maintained, such as keeping the injection molding machine non-stop, non-stop, non-stop, etc., which better replaces the original proportional valve throttling speed regulation method, and greatly reduces energy consumption. Many injection molding plants in the Pearl River Delta have carried out frequency conversion transformation. When transforming the injection molding machine, attention should be paid to the acceleration of the clamping speed, otherwise the output will be reduced, and the harmonic interference of the input and output ends should be paid attention to.
28 Environmental protection load such as sewage treatment
Environmental protection related to human living environment has been paid more and more attention. Green energy appears in cities. Frequency conversion speed regulation can be used in three aspects of environmental protection load. The first is industrial sewage treatment, the second is waste-to-energy plants, and the third is the control of industrial smoke, exhaust and dust removal.
29 Production line load of glass, ceramics, medicine, beverage, food, packaging, etc.
The production lines of glass, ceramics, pharmacy, beverage, food, packaging, etc. adopt frequency conversion speed regulation, which has achieved good results.
30 offshore platform load
AC motors used in oil drilling are far superior to DC speed regulation, especially in sand and dust, because AC motors are reliable. Offshore oil drilling platforms require variable frequency speed regulation devices.
31 Electric submersible pump load
Electric submersible pumps are a method of oil extraction in oil fields. Electric submersible pumps mostly work in oil wells below 1800m. Most of them use power frequency full pressure start and constant speed operation. They have the following shortcomings:
? Excessive starting current will damage the motor insulation
? Produce impact moment, damage the pump structure;
? The pump suddenly produces a large suction force, it is easy to suck in sand particles, causing the pump to jam. Because there is no voltage stabilizing system, the downhole liquid level fluctuates greatly, resulting in unstable voltage and current, resulting in over-excitation and under-excitation of the submersible motor, causing malfunctions.
32 polyester chip load
Polyester chips are one of the main products of petrochemical industry. Due to the high precision of frequency conversion speed regulation, it is easy to control multiple control points and is stable and reliable. After adopting frequency conversion speed regulation, the product quality can be improved, which brings great benefits to the enterprise. Many companies use frequency conversion technology when expanding capacity.
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