中文摘要：

电流滞环控制因其具有高动态性能且不需要任何负载参数的信息，是最简单的三相永磁同步电机驱动系统电流控制方法。然而，传统固定环宽的滞环控制方式存在开关频率不定、电流畸变程度大等缺点。该文提出一种新型变占空比电流滞环控制策略，当采用 id=0方式控制时，可以实现开关频率恒定、电流畸变小和高效率。其中，一个开关周期内开通与关断时间可以通过瞬时相反电动势、交轴电感、滞环环宽和参考电流与实际电流的偏差来确定。此外，三相电枢绕组的电压与电流之间彼此独立。仿真和实验结果验证了所提控制策略的有效性。

英文摘要：

Current-hysteresis-control （CHC） is the simplest strategy used for armature currents control of three-phase permanent magnet synchronous motor-based drive systems due to the advantages of excellent dynamic performances and having no need of load parameters. However, the switching frequency of the conventional CHC with a fixed hysteresis-band is variable and the harmonic ripples of armature currents are usually considerable. In this paper, a novel variable-duty-cycle current-hysteresis-control （VDC-CHC） strategy under the classicid=0 control method is proposed to achieve a constant switching frequency, a lower current ripple and a higher efficiency than conventional CHC. The turn-on and turn-off time in a switching period are obtained according to the instantaneous phase back-EMF, q-axis inductance, hysteresis band and phase current deviation between referenced and real values. In addition, the voltages and currents of three phase windings are independent. Both the simulations and experimental results confirm the effectiveness of the proposed strategy.