Power Electronic

       AC drive harmonic control reactive power compensation The  harmonic interference phenomenon of the inverter  includes: after the inverter starts or runs, the motor overheats, whistles (including increased noise, etc.), and vibrates/vibrates. The motor often breaks down, it is found that the stator insulation of the motor is breakdown after disassembling the motor. The connecting wire between the motor and the inverter will overheat, burst, and even catch fire. The instrumentation, sensors, communications, etc. around the motor will have problems such as work disorder. The above-described phenomena are likely to be caused by the harmonics generated in the inverter inversion process, which must be paid great attention by everyone. Variable speed drive harmonic interference phenomenon When you encounter the following problems, if there is no problem with the inspection equipment itself, you should consider it from the perspective of the harmonic interfe...

The variable frequency drives  is a power control device that converts the power frequency power supply into another frequency by using the on-off function of the power semiconductor device. The correct selection of the frequency converter is very critical to the normal operation of the control system. Usually we need to consider the matching problem with the motor, load type, site environment and so on when we select the inverter. Below we will specifically introduce what factors need to be considered when selecting an inverter. Variable frequency  drives considerations for selecting  1. Determine the purpose of frequency conversion: constant voltage control or constant current control, etc. 2. The load type of the inverter: such as vane pump or positive displacement pump, etc.. Pay special attention to the performance curve of the load, which determines the method of application. 3. Select the inverter according to the actual working current of the motor The actual work...