Examination of PMSM Application in Eelectric Vehicles based on Improved Bi-directional Z Quasi-Source Inverter

This article proposes a variable permanent magnet drive system with DC link voltage based on an improved impedance quasi-source inverter. The proposed inverter for the permanent magnet drive system has improved compared to the prior inverters used in such a system regarding output voltage gain and input current. In addition to functional analysis and dynamic equations, controller design and realization of an improved bilateral impedance quasi-source inverter for use in electric vehicles are also presented. The circuit analysis shows that with a two-way switch in the impedance pseudo-source network, the performance of the inverter under small inductance and low power factor can be improved. In the flux control method, when there is a disturbance in the input voltage of the circuit, the DC link tends to fluctuate, which is considered a defect. To overcome this problem, a dedicated voltage controller is used to remove the disturbance and stabilize the DC link voltage. A non-connection mode is designed. The simulation results are presented to prove the performance of the circuit and the effectiveness of the proposed control method.