基于综合调制方法的高频电源设计  

Design of High-frequency Power Supply Based on Integrated Modulation Method

作　　者：孙传杰 田凯 杨敬然 楚子林 马洁 SUN Chuanjie;TIAN Kai;YANG Jingran;CHU Zilin;MA Jie(Tianjin Research Institute of Electric Science Co.,Ltd.,Tianjin 300180,China)

机构地区：[1]天津电气科学研究院有限公司,天津300180

出　　处：《电气传动》2022年第17期27-31,共5页Electric Drive

基　　金：天津电气院科研开发创新基金项目(YF2021ZL004)。

摘　　要：针对某些特种电气设备的测试需求,设计了一种大功率高频电源。该电源采用H桥级联的方式形成五电平拓扑,采用综合调制方法,包括双极性PWM调制、载波移相SPWM调制以及变载波频率PWM调制技术,从而有效避免了同步调制低频时输出谐波大及异步调制无法兼顾高频与低频输出精度的问题,使电源具有良好的谐波特性,满足了电源在全频率输出范围内的输出精度。对于H桥级联拓扑可能存在的直流电压不平衡问题,设计了一种精简而又在工程上可靠应用的方法。所设计的高频电源已经现场应用于模拟直线发电机的场合,证实了设计方案的可行性。A high-power high-frequency power supply was designed for test requirements of some special electrical equipment.In the power supply,cascaded H-bridge was adopted to form five-level topology structure,the integrated modulation method was adopted,including bipolar PWM modulation,carrier phase-shifted SPWM modulation and variable carrier frequency PWM modulation,so as to avoid the disadvantages of high harmonic output when synchronous modulation at low frequency and low frequency output precision when asynchronous modulation unable to take into account both high frequency and low frequency,make the power supply have good harmonic characteristics,the output precision of the power supply in the full frequency output range was met.A simple and reliable engineering application method was designed to solve the potential problem of DC voltage imbalance in H-bridge cascade topology.The high-frequency power supply designed has been applied in the field to simulate the linear generator,which prove the feasibility of the design scheme.

关 键 词：高频电源 双极性PWM调制 载波移相SPWM调制 变载波频率PWM调制 直流电压平衡 

分 类 号：TM464[电气工程—电器]