With the rapid development of electronic technology, in the AC speed control technology, frequency conversion speed control technology has become a major development direction of modern electric power transmission. It plays a huge role in saving electricity, reducing maintenance, improving quality and output, and achieving automation. It is widely used in industrial production. From the traditional DC motor, slip motor drive, to the application of frequency conversion technology, the method of motor speed control has undergone major changes, it is necessary to explore the characteristics and effects of the inverter drive.
Throughout the domestic and foreign brands of some inverters, its characteristics are roughly: can use standard motor speed control, also useful for other motors; motor can be high speed and miniaturization; explosion-proof; continuous speed regulation; small starting current; The speed is not affected by the current; the acceleration and deceleration time can be adjusted; the vector control is introduced to achieve fast response and high-precision control, which can replace the DC motor. In terms of the application effect of the inverter, the main performances are as follows:
(1) Energy saving;
(2) Implement control automation to improve equipment reliability;
(3) Improve the accuracy of control and equipment performance.
In industrial and mining enterprises, these characteristics of the frequency converter can solve difficult problems in production for enterprises, and also create huge benefits for enterprises. The most typical application of the inverter is to use the frequency converter for speed control of various mechanical energy saving. In our factory, it is mainly used for speed control of fans and constant torque transmission. One characteristic of the fan pump is that the load torque is proportional to the square of the speed, and the shaft power is proportional to the cube of the speed. Therefore, the previous motor is operated at a constant speed, and the flapper valve is used to adjust the air volume, and the speed is adjusted according to the required air volume to obtain a large amount of power saving effect.
The application of the frequency converter in the electronic weighing of raw materials is an important process in the sintering process. It is used to mix various raw materials such as iron, raw materials, flux, fuel, etc. used for sintering, and mix them together. The chemical composition of the material meets the set requirements and remains stable. The stability of the ingredients directly affects the quality of the sintered ore and the quality. Before using the inverter control, the electronic material of the raw material is controlled by the slip motor, the use efficiency is low, the energy consumption is high, the speed regulation structure is complex, the maintenance is difficult, the production environment is poor, the equipment failure rate is high, the loss is large, and the production belt is There are many unfavorable factors. Combined with the process equipment, the frequency conversion technology and computer technology are combined, and the pressure sensor is used for real-time monitoring to form an electronic weighing control system for the raw material ingredients.
By analyzing the working principle and actual operation of the inverter, the inverter is a set of equipment suitable for the production needs of our factory. After several years of practice, the equipment is stable in operation, low in equipment failure rate, low in maintenance intensity, in line with the requirements of enterprise automation production, and brings considerable economic benefits to our factory.
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