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更新时间:2026.04.18
有源箝位零电压开关三相PFC变换器及其零电压开关-空间矢量调制策略

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页数: 9页

In three-phase PFC converter,there exist severe switch anti-parallel diode reverse recovery problems.The effective measures of Compound Active-clamping and Minimum Voltage Active-clamping techniques in single phase PFC are extended to three-phase PFC.A family of Active-clamping ZVS soft switching PFC converter is got. They can effectively suppress the diode reverse recovery, and realize ZVS for all the switches. In order to reduce the number of the auxiliary switches, A ZVS space vector modulation (ZVS-SVM)is proposed. It uses only one auxiliary switch and can realize ZVS for all the switches. The switching frequency of the main switch and the auxiliary switch is fixed, thus the input current waveform is good.The theory has been illustrated by the compound active-clamp (CAC) three phase PFC. One DSP controlled 4kW PFC converter prototype with CAC is implemented.

数字化零电压零电流开关逆变电源的设计

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大小:133KB

页数: 2页

本文针对数字化电源的特点进提出了数字化零电压零电流开关逆变电源的设计思想,用IGBT作为逆变电路主开关元件组成主电路,全桥式逆变结构能输出较大功率,辅以高频变压器和高频整流电路。通过谐振技术和移相控制技术的结合使领先桥臂实现了零电压开关,滞后桥臂实现了零电流开关。控制系统核心控制器件采用2407 DSP,以UC3879为脉冲发生电路,采用闭环反馈和参数自调整模糊PID方法实现对输出的恒流控制。

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