一相开路时双三相永磁同步电机简化容错控制策略

一相开路时多相电机容错控制策略主要采用基于磁势不变的铜损和转矩优化,降低了系统的动态性能;而基于动态解耦的矢量控制,则增加了系统的复杂度,降低了切换过程的可靠性。从故障前后系统数学模型一致性和软硬件切换简洁性出发,提出了一种中性点隔离的一相开路时双三相永磁同步电机容错控制系统;将剩余有效绕组的作用等效为三相永磁同步电机和单相永磁同步电机的合成;在旋转dq坐标系和静止坐标系融合系统中建立其动态数学模型。通过实验平台验证了该容错控制策略能够实现故障前后的软硬件兼容,改善切换过程可靠性,有效提升了系统的转矩输出能力。

Simple fault tolerant control of dual three-phase PMSM under one phase open-circuited condition

The fault tolerant control strategy of the multi-phase motor under one phase open-circuited condition focus on copper loss minimization and torque optimization based on the constant magnetic motive force, which decreases the dynamic performance of the system, and the dynamic decoupling vector control increases the system complexity and reduces the reliability of switching process. In order to achieve the consistency of the mathematical model and the simplicity of the hardware and software design before and after the fault, a fault-tolerant control method of dual three-phase PMSM(Permanent Magnet Synchronous Motor) under one phase open-circuited fault is proposed, which makes the remaining active windings equivalent to the combination of three-phase PMSM and single-phase PMSM. The mathematical model of dual three-phase PMSM is established in the combined rotating dq and stationary reference frame. Experimental results prove that the proposed fault-tolerant control method can realize the effective compatibility of the software and hardware, improve the reliability of the switching process, and enhance the magnetic torque of the system.