在汽车电动助力转向(EPS)系统中，逆变器的死区问题是影响转向电机输出性能的主要因素，表现为电流谐波含量增加，引发电机转矩脉动，增加电机附加损耗。双三相永磁同步电机采用2套定子绕组相移30°结构，通过双dq坐标变换控制使6次谐波电流含量降低，电磁转矩总谐波含量减小。仿真结果验证了所提方法的正确性和有效性。

In automotive electric power steering (EPS) system, the dead-time problem of the inverter is the main factor affecting the output performance of the steering motor, which is manifested by an increase in the current harmonic content. The dead-time problem causes motor torque ripple and increases the additional loss of the motor. The dual three-phase permanent magnet synchronous motors adopt two sets of stator windings with 30° phase shift. The content of the sixth harmonic current is reduced by the double dq coordinate transformation control, and the total harmonic content of electromagnetic torque is reduced. Simulation results show that the proposed method is correct and effective.