Research and Simulation of Dual Permanent Magnet Synchronous Motor Drive System with Quasi Z-Source
Due to the shared mode,the nine switch inverter can reduce the number of power electronic devices,re-duce the volume and weight of the driving device,and is suitable for dual machine drive applications.A dual perma-nent magnet synchronous motor drive system with a quasi Z source was studied to address the issue of low voltage uti-lization of a single motor in a nine switch inverter dual machine drive system.In order to realize the independent con-trol of each motor in the dual machine drive system,the principle of dual machine time-sharing control based on SVPWM modulation was studied.For purpose of different working conditions,the constant torque-flux weakening con-trol strategy of permanent magnet synchronous motor was studied.The indirect voltage method was used to control the Z source voltage to maintain the voltage stability.The simulation model of dual permanent magnet synchronous drive system with quasi Z source was built.The simulation results show that the control strategy of permanent magnet syn-chronous motor and quasi Z source is effective,the time-sharing control can realize the independent control of dual machine drive system,and it can meet the requirements of engineering application.
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