Abstract:

The power conversion circuit of the permanent magnet synchronous motor control system powered by single phase sinusoidal AC power supply was studied in this paper. The filter capacitor, the current of rectifier BR and the parameters of the main circuit of the control system  were analyzed and calculated, and the formula for calculating the key parameters was also derived. Finally, the correctness of the principle analysis and the feasibility of the circuit parameter calculation method were verified by experiments, which had a certain reference value for the design of power transformation circuit.

Key words: permanent magnet synchronous motor, rectifier BR, calculation method, parameters of power conversion circuit, inverter, filter capacitor