在稳态时可以使灯工作于低频叠加高频的方波电压，从而避免了声谐振的发生。

While the lamp is running in the steady - state, it can also make the lamp work at a low frequency square wave voltage and current a voiding acoustic resonance.

开发的高性能低成本两相无刷直流电动机，以正交方波电压模式运行。

This paper aims to develop a high property low cost of brushless DC mogto.