Abstract:A PMSM precision synchronization control system with multi module collaboration at the vehicle specification level was designed to address the issues of torque ripple, speed oscillation, and energy efficiency degradation caused by magnetic field coupling, harmonic injection, and inverter nonlinear distortion in the driving conditions of permanent magnet synchronous motors in new energy vehicles. By adopting a vehicle grade NPU and Cortex-M7 collaborative computing architecture, combined with silicon carbide power modules and pre drivers, as well as a full vehicle grade sensor acquisition module, high real-time performance, high reliability, and environmental adaptability at the hardware level have been achieved. Combining zero sequence suppression and predictive dead zone compensation, an adaptive zero pole cancellation complex vector decoupling algorithm is used to decouple the d/q-axis current and suppress harmonics. Construct an adaptive space vector pulse width modulation strategy to suppress q-axis current torque ripple, speed oscillation, and other issues, enhance motor torque response and synchronous tracking capabilities, and enable the motor to quickly respond and operate stably under dynamic conditions. The experimental results show that the system utilizes frequency adaptive function to control the power response delay within 20ms and the current harmonic distortion rate within 0.001%, achieving precise suppression of harmonics.
