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一、引言众所周知,应用脉宽调制技术可以从直流的恒定电压电源变换为频率与电压可变的输出电源。如图1所示为从恒定直流电源变换为输出交流电源的主电路及其波形图,通常应用调制技术获得其换向开关角(α_1),以便最大限度地抑制电源的谐波分量至被允许的程度。通常是消除其较低次的谐波分量。应用传统的技术与摸拟电路,是以很复杂的控制为代价来减少输出电压的总谐波分量。传统电路采用的一般方法是决定两组不同基准波相交,控制电源开关应接通或断开的瞬间。
I. INTRODUCTION As we all know, the application of pulse-width modulation technology can be converted from DC constant voltage power supply to a variable frequency and voltage output power. Shown in Figure 1 from the constant DC power output for the exchange of AC power output of the main circuit and its waveform, modulation technology is usually used to obtain the commutation switching angle (α_1), in order to minimize the power harmonic component to be allowed Degree. It is usually to eliminate its lower order harmonic components. Using traditional techniques and analog circuits, the total harmonic components of the output voltage are reduced at the expense of very complex controls. The traditional method of using a common circuit is to determine the intersection of two groups of different reference waves, control the power switch should be turned on or off the moment.