ISG电机在冷起动中的策略仿真

ISG电机的控制系统决定着发动机冷起动性能,是弱混合动力系统中关键部件。它必须在很短的时间内拖动发动机至点火转速,并且要求转速过渡平稳,脉动冲击小。基于永磁同步电机(PMSM)数学模型选定矢量调速策略,采用脉宽调制器(SVPWM),因具有谐波少、响应快的优势,可作为电流调制方法。采用建立S imu link上的发动机阻力矩模型制定发动机起动策略,对冷起动过程进行仿真。仿真结果表明控制策略能够满足发动机快速起动的要求,并且升速过程平稳,受阻力矩变化影响较小,具有较好的抗负载扰动性能。

Simulation on ISG Motor in the Process of Cold Start on a HEV

As a key part in mild hybrid system,ISG motor has a significant influence on the performance of engine' cold starting.ISG motor should pull engine to ignition speed smoothly in short time with smaller torque ripple.This paper describes a vector control of permanent magnet synchronous motor(PMSM) based on the math model.With the advantages of smaller syntonic ripple and quick response,SVPWM is introduced in this paper for current control.With the dynamic running resistance torque model of an engine,a start s...