第34卷第10期·2240·2008年lo月高电压技术HighVoltageEngineeringV01．34No．10Oct．2008基于DSP的数字化高压直流电源的研究张春林1“，严萍1(1．中国科学院电工研究所，北京100080；2．中国科学院研究生院，北京100039)摘要：为得到完全可控的直流高压，便于绝缘材料的耐压实验研究。介绍了一种以数宁信号处理器(DSP)为控制核心的数字化高压直流电源。主电路采用全桥移相并联谐振的方式，通过控制逆变电路前后桥臂的相位差对输出电压进行准确控制。利用数字光纤完成隔离与高压反馈信号的传输，用DSP进行采集和数字比例积分(PI)箅法计算相位差。对输出电雎实时跟踪。从控制电路到主电路．完整地介绍了整套系统的工作原理并给出了具体参数和实验结果。结果表明，此套电源系统使得输出电压的幅值、上升沿、下降沿和电压维持时I’日J等呵以任意调节。给耐压实验带来很大的便利。关键词：DSP；PI调节；移相控制；高压直流电源；并联谐振；数字化中图分类号：TM832文献标志码：A文章编号：1003-6520(2008)10-2240—04ResearchofDigitalHigh-VoltageDCPowerSupplyBasedonDSPZHANGChun—linl一。YANPin91(1．InstituteofElectricalEngineering，ChineseAcademyofSciences，Beijing100080，China；2．GraduateSchool，ChineseAcademyofSciences，Beijing100039，China)Abstract：Traditionalhigh-voltageDCpowersupply-whichisgeneratedbyfrequencytransformerfollowedbyrecti—tierandfilter。hasthedisadvantagesofbigsize。lowefficiency，highrippleandinconvenientoperation-etc．。espe—dallyintheapplicationssuchasdielectricinsulationtestwhichneedstoadjusttheoutputvoltageflexibly．InordertoconvenientlyobtainacontrollableHVDCfordielectricinsulationtest，adigitalhigh—voltageDCpowersupplybasedonDSPcontrolisintroduced．Thestructureofthemaincircuitisafull—bridgeparallelresonantconverter。whichiscontrolledbythephase-shiftingmethod．ByregulatingthephasedifferenceofdrivingsignalsofthetWObridges。theoutputvoltagecanbewellcontrolled．Avoltagefeedbackclosedloopisusedinthecircuit-inwhichthedigitalopticalfiberisusedforisolationandtransmission．TheDSPcontrollercalculatesthephasedifferencewhichisbasedonthefeedbacksignal-sothattheoutputvoltagecanbereal—timelytraced．Moreover-itispossibletocontr...
