| The multiphase permanent magnetic synchronous motor has advantages of small torque ripple and low noise and vibration.The multiphase permanent magnet synchronous motor is basically using the two level driving circuit, but there are not too many researches on the three level variable frequency drive system of multi phase permanent magnet synchronous motor.The six phase permanent magnet synchronous motor is selected as the research object, and the three phase permanent magnet synchronous motor six level inverter control strategy is studied in this paper. First of all, in theory, the six phase permanent magnet synchronous motor stator winding space time harmonic is analyzed, the coupling relationship between six phase permanent magnet synchronous motor space and time was obtained. And analyzed when adding the fundamental frequency current in the stator winding of stator winding and rotor winding between the motor electromagnetic radial component interactions, obtained the six phase permanent magnet synchronous motor fixed rotor magnetic potential generated radial force of betweenness relation. Then, the topology of six phase permanent magnet synchronous motor is proposed, which is a dual three-phase three level inverter driver. The feasibility of the proposed topology is verified by theoretical analysis.Once again based on the traditional six phase permanent magnet synchronous motor control strategy, achieved the voltage compensation and speed of the sliding mode control, which has a fast dynamic response, strong anti-interference ability. obtained by theoretical analysis. The final design of the six phase permanent magnet synchronous motor is the three level inverter control system hardware control circuit, and set up six phase permanent magnet synchronous motor three level inverter control system hardware in the loop test platform. With a 100 k W six phase permanent magnet synchronous machine as the object, the simulation tested the corresponding conditions, the operation condition of the corresponding simulation, verified the feasibility of the six phase permanent magnet synchronous dual three level topology, and the excellent performance of the speed sliding mode voltage compensation control strategy. |
