Inverter load type application - CNweiken

1, air conditioning load class
Office buildings, shopping malls, and some supermarkets and factories have central air conditioners. In the summer, the electricity consumption is very high. In hot weather, the electricity consumption of air conditioners in Beijing, Shanghai and Shenzhen accounted for more than 40% of peak power. Therefore, using the frequency conversion device, dragging the refrigeration pump, cold water pump and fan of the air conditioning system is a very good power saving technology. At present, there are many companies that specialize in air conditioning, and the main technology is frequency conversion and power saving.
2, crusher type load
Metallurgical mines, building materials use a lot of crushers, ball mills, this type of load using frequency conversion after the effect is significant.
3. Large kiln calciner load
Large-scale industrial rotary kiln (converter) such as metallurgy, building materials and caustic soda used to be regulated by DC, commutator motor, slip motor, cascade speed regulation or medium frequency unit. Due to the speed control mode or the slip ring or low efficiency, in recent years, many units have adopted frequency conversion control, and the effect is excellent.
4, compressor load
Compressors are also a wide range of applications. Low-pressure compressors are commonly used in various industrial sectors. High-pressure large-capacity compressors have many applications in steel (such as oxygen generators), mines, fertilizers, and ethylene. The use of frequency control, both bring the advantages of small starting current, power saving, and optimized equipment life.
5, rolling mill load
In the metallurgical industry, in the past, large-scale rolling mills used AC-AC inverters. In recent years, AC-DC-AC inverters have been used. The exchange of mills is a trend, especially in light-load mills, such as the multi-rack of Ningxia National Aluminum Products Factory. The aluminum rolling mill adopts a general-purpose frequency converter to meet the requirements of low-band load start, synchronous operation between racks, constant tension control, and simple and reliable operation.
6, pump load
Pump type load, a wide range, including pumps, oil pumps, chemical pumps, mud pumps, sand pumps, etc., low-pressure medium and small capacity pumps, but also high-pressure large-capacity pumps.
Many water pump companies in the water pump, chemical and fertilizer industries, such as chemical pumps, reciprocating pumps, mud pumps in non-ferrous metals and other industries use frequency control, which produces very good results.
7, feeder load
In the metallurgy, electric power, coal, chemical and other industries, there are many feeders. Regardless of the disc feeder or the vibrating feeder, the frequency conversion speed regulation effect is very significant. The disc feeder of Jihua Company's dye plant sulfuric acid production line was originally designed for slip speed regulation, low frequency torque, many faults, and frequent card rotation. After the frequency conversion speed regulation, because it is an asynchronous machine, the reliability is high and the power is saved. What is more important is that the closed loop of the temperature transmitter ensures the accuracy of the conveyed materials, and does not cause the oxidant to over-temperature and cause an accident, thereby ensuring the production. Orderly.
8, fan load
Fan-type loads are large-scale and wide-ranging equipment, and are widely used in steel mills, power plants, nonferrous metals, mining, chemical, textile, chemical fiber, cement, paper and other industries. Most adopt the adjustment baffle opening to adjust the air volume, waste a lot of electric energy, and adopt frequency conversion speed regulation, which can save electricity and reduce mechanical wear and prolong the life of equipment.
9, mixer load
There are many mixers in the chemical and pharmaceutical industries, and the use of variable frequency speed control instead of other speed control methods has many advantages.
10, spinning machine load
The spinning process is complicated, there are many stations, tension control is required, and some require position control. The use of frequency conversion speed control effect is good.
11, paper machine load
The paper machine of China's paper industry requires SCR DC speed regulation for high precision, and slip motor and commutator motor for some. Reliability and precision are not high due to the presence of slip rings and carbon brushes. Leading to the backwardness of papermaking machinery, the general speed is only about 200m/min, which is difficult to compare with 2000m/min abroad. Therefore, the frequency conversion of papermaking machinery is the trend of the times.
12, grinding machine and other mechanical loads
The spindle of the grinding machine has a high speed and requires a high frequency of the power supply, 200 Hz, 400 Hz or even 800 Hz. In the past, the power supply of the spindle motor was mostly dragged by the intermediate frequency generator set. The IF unit has large volume, low efficiency, high noise and poor precision.
13, cigarette machine load
In the cigarette industry, it is mainly to solve the problem of stepless speed regulation and reliability, the technology is simple, the frequency converter is simple to use, and the effect is great.
14, vibration reduction and noise reduction load
Many loads, such as large air compressors and medium frequency units, have large noise and large vibration. Using frequency conversion technology, it can reduce vibration and reduce noise and reach the standard.
15, injection molding machine load
The injection molding machine is a key equipment for plastic processing and molding, with a large number and high power consumption. In the past, most of the power-saving methods were converted to Y-type (star type) by the △ type (triangle type) to save electricity, and the effect was general. The frequency conversion speed regulation does not change the original structure of the injection molding machine, and controls the pressure or flow of several processes of the oil pump (such as clamping, clamping, injection, pressure keeping, demoulding, mold-removing, etc.), which can save 20%~52 %, better replaced the previous proportional valve throttle speed control mode, greatly reducing energy consumption, many injection molding plants in the Pearl River Delta have carried out frequency conversion transformation. When remodeling the injection molding machine, pay attention to the mold clamping acceleration, otherwise the output will be reduced, pay attention to the harmonic interference between the input terminal and the output terminal.
16, glass, ceramics, pharmaceutical, beverage, food, packaging and other production line load
Glass, ceramics, pharmaceutical, beverage, food, packaging and other production lines use frequency control, and have achieved good results.