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on-off time中文是什么意思

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  • According to the following design theory : the dsp calculates in real time and produces three phases spwm waves to control the on or off of the 6 igbts in ipm respectively . ipm then inverts the commutated single phase direct current ( insulated gate bipolar transistor ) into three phases alternating current . when modulated signals of spwm are changed , the on - off time of switches also changes , so as to the voltage and frequency of output signals
    本文提出了一种基于dsp (数字信号处理器tms320f240 )的通用的三相间接变频电源系统,利用分段同步调制法和混合查表法,实时计算不同频率下的采样周期、电压幅值、输出脉宽,产生双极性spwm波形,经驱动放大后用于ipm ( intelligentpowermodule )中的绝缘栅双极型晶体管栅级驱动,以控制电源的输出电压和频率,实现变频电源的智能数字控制。
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