The overmodulation strategy plays an important role in the field weakening control for high-speed permanent magnet synchronous motor (PMSM) drives. However, the voltage jumps between the output voltage vectors (OVVs) in high overmodulation regions result in the deterioration of both current performance and loading capability. In order to solve this problem, a novel overmodulation strategy based on the voltage vector space division is proposed. The overmodulation regions are divided by the amplitude and the phase of reference voltage vectors to guarantee the continuity of OVVs. When the overmodulation region changes, the voltage jump can be efficiently suppressed, which contributes to eliminating current ripples. In addition, the proposed parallel projection replaces the traditional center projection to increase the modulation index, which can also improve the fundamental voltage amplitude, and make a reduction of the field weakening current and its current overshoot. By improving the utilization of the dc bus voltage, the higher capability of the output torque can be achieved in the field weakening region. Finally, the effectiveness of the proposed strategy is verified on a high-speed surface-mounted PMSM platform by the experimental results.

中文翻译：

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一种基于电压矢量空间划分的高速表面贴装永磁同步电机驱动器的过调制策略

过调制策略在高速永磁同步电机 (PMSM) 驱动器的弱磁控制中起着重要作用。然而，高过调制区域中输出电压矢量 (OVV) 之间的电压跳跃会导致电流性能和负载能力的恶化。为了解决这个问题，提出了一种基于电压向量空间划分的新型过调制策略。过调制区域除以参考电压矢量的幅度和相位，以保证 OVV 的连续性。当过调制区域发生变化时，可以有效抑制电压跳变，有助于消除电流纹波。此外，所提出的平行投影代替了传统的中心投影以增加调制指数，也可以提高基波电压幅值，减小弱磁电流及其电流过冲。通过提高直流母线电压的利用率，可以在弱磁区实现更高的输出转矩能力。最后，通过实验结果在高速表面贴装永磁同步电机平台上验证了所提策略的有效性。