开关电源把直流电源或交流电源通过它可以获得一个稳定的直流电压源。
Switching power supply or DC power to AC power through it will be a stable DC voltage source.
本文介绍一种新型的直流开关电源，该电源是一种直流电压输入，三种直流电压输出，并能够达到相当高的效率。
A new type of DC switch power which is possessed a DC voltage input and three DC voltage output, and is able to reach higher efficiency has been introduced in this paper.
开关电源经试验验证性能良好，直流电压输出纹波不大于0.3%，效率高于85%。
The variety of the output DC voltage is less than 0.3% and the efficiency is higher than 85%.
SVPWM具有较高的直流电压的利用率，开关损耗小，从而实现了高性能的逆变输出。
SVPWM technique have many good qualities, such as less pulsating torque, high usage of DC bus voltage, less switching loss, better high-speed regulation performance.
例如，在测量小直流电压的系统中，开关的接触电势将会被叠加到信号上。
For example, in a system for measuring small DC voltages, the contact potential of the switch will be added to the signal.
为降低开关频率和减少开关损失，需增加功率滞环比较器环宽，否则引起瞬时有功功率和直流电压波动，影响系统的性能；
The hysteresis wide is widened for decreasing switching frequency and energy losses, which causes the pulsation of instantaneous active power and direct current voltage.
所述开关元件从直流电压中产生具有第一频率的第一交流电压。
The switch element generates an alternate current voltage having a quasi-higher frequency from a direct current voltage.
电力变换器主电路部（3），其根据该脉冲宽度调制波对开关元件进行驱动，将直流电压转换为三相交流电压；
A power converter circuit (3) drives a switching device by the pulse-width modulated wave for converting a direct current into the three phase alternating current.
电力变换器主电路部（3），其根据该脉冲宽度调制波对开关元件进行驱动，将直流电压转换为三相交流电压；
A power converter circuit (3) drives a switching device by the pulse-width modulated wave for converting a direct current into the three phase alternating current.
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