变频器应用中存在的问题及处理对策（Problems existing in application of frequency converter and Countermeasures）.docVIP

变频器应用中存在的问题及处理对策（Problems existing in application of frequency converter and Countermeasures） Frequency converter in AC drive system application shows good control, can realize soft start and stepless speed regulation, acceleration and deceleration control, make motor get high performance, and has significant energy saving effect. Therefore, the application of variable frequency speed regulation can improve the control accuracy, production efficiency and product quality of the production machinery, thus helping to realize the automation of the production process. Therefore, inverter has been widely used in all aspects of industrial production in recent years. But in the actual application and maintenance of inverter, some problems have also been exposed, which need to be paid attention to. I. mistakes in the application of frequency converter Frequency converter in AC motor traction applications, its advantages are obvious to all. But some enterprises in the new and renovation project application of converter process is often not taken into account the high equipment investment is the main reason, subjective view of motor control using the traditional control method can save not a small investment, this concept is actually entered a misunderstanding. The traditional control method using star angle conversion and autotransformer starting from the end of two, need to control cable to the motor, in the above medium size enterprises due to the control of the motor are centralized control, so are the length of cable. So compared with the traditional control mode of frequency converter, although high equipment investment, but saves a cable, and in recent years the price of cable has been high, so the above 55KW motor with inverter control of the investment and the traditional control method is similar to that of technology and product quality have been mature. In addition, its good energy-saving performance, there is a high rate of return on investment. In the fan, pump a