Research on EMC Simulation of Electric Drive System of Electric Engineering Machinery

AbstractIn order to suppress the electromagnetic interference in electric construction machinery, improve the stability and safety of the vehicle on the influence factors of electric construction machinery EMC system analysis, electric drive system due to the internal power electronic equipment for a long time in the high voltage, high current conditions and become the main influence factors of electric construction machinery EMC. The main methods to reduce electromagnetic interference of electric drive system grounding, shielding and filtering are expounded, which leads to the emulated research of EMC simulation of electric drive system of electric engineering machinery. The equivalent circuit model of battery, electronic control, motor and test system is established, and the low-pass filter composed of inductor and capacitor is designed. And the combined three electric system, test system, filter circuit composed of the model of simulation analysis, with or without filter input current, different frequencies of input and output voltage signals compared, the results show that adding filter can effectively improve the conducted interference, the use of RLC filter composed of four RLC components, can effectively improve the signal low frequency bias and high frequency distortion.