square wave voltage

To reduce the switching losses of IGBTs in PWM rectifier, a third order square wave is added to the phase voltage control signal on the basis of the Improved Period Average Model. This new control algorithm leads to no switching in about 1/ 3 cycle.

为降低PWM整流器的开关频率，本文在整流器的改进周期平均模型基础上，在相电压控制信号中叠加三次方波信号，使得整流器中的开关管有1／3时间不动作。

These reasearch results will greatly promote advancement of theory of aging and breakdown under such pulse condition. As a result, frequency control technique can be widely used. A novel PD signal measurement system and statistic analysis software is presented under square wave pulse voltage.

通过这些研究，将极大地促进变频条件下绝缘老化和击穿理论的发展，使变频调速技术应用前景更加广泛。设计了一种新的脉冲电压下局部放电测量系统和统计分析软件。

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.

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。