Method and system for suppressing tonal noise over wide speed range in alternating current machine

A method of suppressing tonal noise over a wide speed range in an AC machine by current injection and voltage injection is provided. The method includes, within a computerized processor, monitoring a position sensor that measures a current motor frequency of the motor, comparing the current motor frequency to a sampled frequency of the position sensor, and operating one of a current injection mode and a voltage injection mode based on the comparison to suppress the tonal noise in the motor. 提供了一种通过电流注入和电压注入来抑制交流电机中宽速度范围内的音调噪声的方法。该方法包括：在计算机化处理器内，监测测量该电机的当前电机频率的位置传感器，将该当前电机频率与该位置传感器的采样频率进行比较，以及基于该比较来操作电流注入模式和电压注入模式中的一者，以抑制该电机中的该音调噪声。