Terminal Voltage Analysis according to Filter Types of Motor Drive System with Long Cables

This work starts with a comparison between Ansys simulation software (HFSS, Q3D, and Q2D) combined with circuit diagram simulation (Ansys circuit) and actual measurements for a longitudinally homogeneous unit length of cable and finally selects the most suitable simulation method Q2D combined with Ansys circuit. The finite element simulation modeling and the circuit simulation can effectively simulate the inverter-cable-motor system, which can be a key tool to solve the overvoltage phenomenon at the motor end. In this paper, firstly, through the finite element modeling of the power cable, a finite element model matching the characteristic parameters of the cable is obtained, a high-frequency motor model is established in the circuit, and the frequency response of the cable and the motor is obtained through experimental and simulation comparison. This confirms the validity of the finite element simulation. And through the inverter drive regulation analysis of switching frequency, duty cycle on the motor end overvoltage, and cable length and motor end relationship, accurate simulation modeling will provide an effective way to analyze the motor overvoltage phenomenon and help to better simulate the inverter-long cable-motor system.