For permanent magnet synchronous machines (PMSMs), current harmonics need to be controlled under two kinds of conditions. Under the first condition, the current harmonics caused by the non-sinusoidal back-electromotive force (EMF) and the dead time of inverters should be suppressed. Under the second condition, specific current harmonics should be injected to suppress the torque ripple of motors. Therefore, the accurate control of current harmonics is critical. It has been found that the original multiple reference frame (MRF)-based control algorithm cannot effectively achieve the control of current harmonics at high speeds. For the currents in MRFs, motional EMF was dominant rather than induced EMF at higher speeds. As a result, the original MRF-based control algorithm does not work at high speeds. To solve this problem, this paper proposed a novel MRF-based control algorithm that considers motional EMF. Furthermore, this paper achieved decoupling control of the current harmonics in MRFs for interior PMSMs. With the proposed control algorithm, the current harmonics of interior PMSMs can be controlled at both high and low speeds. Under the influence of non-sinusoidal back EMF and the dead time of the inverter, the effect of current harmonic control was verified on a laboratory test bench.

对于永磁同步电机（PMSM），需要在两种条件下控制电流谐波。在第一种情况下，应抑制由非正弦反向电动势（EMF）引起的电流谐波和逆变器的死区时间。在第二种情况下，应注入特定的电流谐波以抑制电动机的转矩脉动。因此，精确控制电流谐波至关重要。已经发现，原始的基于多参考系（MRF）的控制算法不能有效地实现高速电流谐波的控制。对于MRF中的电流，在较高速度下，运动EMF占主导地位，而不是感应EMF。结果，原始的基于MRF的控制算法无法高速运行。为了解决这个问题，本文提出了一种基于新的基于MRF的控制算法，该算法考虑了运动EMF。此外，本文实现了用于内部PMSM的MRF中电流谐波的去耦控制。利用所提出的控制算法，可以以高速度和低速度控制内部PMSM的电流谐波。在非正弦波反电动势和逆变器死区时间的影响下，在实验室测试台上验证了电流谐波控制的效果。