The concept of the dual channels provides integrated onboard charger (IOC) with robust fault tolerance capability and high reliability. This paper investigates a dual‐channel IOC system integrated symmetrical six‐phase permanent magnet synchronous machine (SSPMSM) drives. A key challenge in this system is the inevitable occurrence of unbalanced charging powers between the two channels, which results in a rotating field and hence a charging torque generation during charging. To address this issue, a harmonic current injection technique is proposed, leveraging the inherent multicontrol degrees of freedom of the SSPMSM to counteract the rotating field. By injecting harmonic components of the x‐, y‐, and 01‐axes, the desired straight‐line‐shaped trajectory can be maintained in the α–β subspace. Then, the specified harmonic components can be calculated with two constraints of balanced grid currents and zero erage charging torque. Subsequently, a unified controller is designed for dual‐channel IOC. Finally, the efficacy of the harmonic current injection technique is validated through experimentation.
中文翻译：
一种用于双通道集成车载充电器的谐波电流注入技术
双通道的概念为集成的车载充电器 （IOC） 提供了强大的容错能力和高可靠性。本文研究了一种双通道 IOC 系统集成对称六相永磁同步电机 （SSPMSM） 驱动器。该系统的一个关键挑战是两个通道之间不可避免地会出现不平衡的充电功率，这会导致旋转磁场，从而在充电过程中产生充电扭矩。为了解决这个问题，提出了一种谐波电流注入技术，利用 SSPMSM 固有的多控制自由度来抵消旋转磁场。通过注入 x 轴、 y 轴和 01 轴的谐波分量，可以在 α 到 β 子空间中保持所需的直线形状轨迹。然后，可以在平衡电网电流和零平均充电扭矩两个约束下计算指定的谐波分量。随后，为双通道 IOC 设计了一个统一控制器。最后，通过实验验证了谐波电流注入技术的有效性。
