考虑开路运行模式时的五相永磁同步电机FOC

五相永磁同步电机在开路故障下,由于缺乏有效的空间解耦模型,常采用滞环电流控制。针对滞环电流控制难以应用于大功率场合的问题,提出了一种五相电机矢量控制,即正常模式、单相开路、两相开路(包括相邻和不相邻两相开路)模式下的转子磁场定向控制(FOC)。所提FOC基于维持基波定子磁动势和定子永磁体磁链圆形旋转的原则,给出了适用于各种运行模式下的Clarke和Park变换矩阵以及空间解耦模型。这些解耦模型具有相似的电压方程和转矩方程形式,因此矢量控制可以得到统一。在五相电机驱动系统上验证了所提出的空间解耦模型及FOC方法的有效性和可行性。

Unified FOC of five-phase permanent magnet motor under open-circuit conditions

Due to the absence of decoupled faulty motor models of five-phase permanent magnet motor under faulty conditions, the hysteresis current control is usually employed. To cope with issues associated with hysteresis current control in high power applications, a unified vector control for five-phase motor is proposed, i. e.,FOC(Field Oriented Control) under respectively normal mode, single-phase fault mode, and two-phase fault mode(including adjacent and non-adjacent phases open-circuit conditions) operations. Based on the principles of preserving magnetic motive force and permanent magnet flux linkage of remaining phases circular rotating, the Clarke and Park transformation matrixes and the decoupled models adapted for different faulty conditions are given. These decoupled models have similar voltage and torque equations so that the FOC can be unified. The effectiveness and feasibility of the proposed decoupled models and unified FOC are validated by experimental results for five-phase motor drive system.