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ID:5295141
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页数:8页
时间:2017-12-07
《不对称半桥副边谐振pwm变换器》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第17卷第1O期电机与控制学报、,olI17N0.102013年lO月ElectricMachinesandControl0ct.2013不对称半桥副边谐振PWM变换器陈章勇1,2,许建平,一,张斐,一,王金平,2(1.西南交通大学电气工程学院,四川成都610031;2.西南交通大学磁浮技术与磁浮列车教育部重点实验室,四川成都610031)摘要:针对不对称半桥(asymmetrichalfbridge,AHB)变换器占空比变化范围宽而带来输出二极管电压应力高、且存在电压增益曲线呈非线性特性的问题,研究了AHB副边谐振(secondarysideres
2、onant。SSR)PWM开关变换器。AHB—SSR—PWM变换器原边采用不对称脉冲宽度调制,实现了开关管的零电压开通(zerovoltageswitching,ZVS),且原边开关管的电压应力箝位在输入电压:AHB.SSR—PWM变换器副边用带滤波电感的谐振支路代替传统的半波整流支路,实现了输出二极管的零电流关断(zerocurrentswitching,zcs)。此外,AHB.SSRPWM开关变换器的输出端存在滤波电感。减小了输出电压的纹波。分析结果表明,输出二极管的电压应力几乎与占空比无关;电压增益与隔离Buck类变换器类似,呈现线性增益特性。
3、通过一台200V输入,24V/2A输出的实验模型验证了理论分析的正确性。关键词:AHB—SSR—PWM变换器;不对称半桥;谐振变换器;零电压开通;零电流关断中图分类号:TM46文献标志码:A文章编号:1007--449X(2013)10--00394)7Asymmetrichalf-bridgesecondary-sideresonantPWMswitchingconverterCHENZhang—yong,-,XUJian—ping,一,ZHANGFei,一,WANGJin—ping,(1~SchoolofElectricalEngineering
4、,SouthwestJiaotongUniversity,Chengdu610031,China;2.KeyLaboratoryofMagneticSuspensionTechnologyandMaglevVehicle,MinistryofEducation,SouthwestJiaotongUniversity,Chengdu610031,China)Abstract:Thewiderdutyratiovariationrangeoftheasymmetrichalf-bridge(AHB)converterunderwiderinputvolt
5、agevariationrangebringshighvoltagestressoftheOUtputdiodeandproducesnonlinearvoltagegain.Asymmetrichalf-bridgesecondary.side.resonantPWM(AHB.SSR.PWM1switchingcon.verterwasanalyzedinthepaper~TheprimarysideoftheAHB—SSR.PWMconverterutilizesasymmetricpulsewidthmodulation(APWM)toachi
6、evezero—voltageswitching(ZVS)oftheswitchesandclampsthevoltageoftheswitchtotheinputvoltage.Zerocurrentswitching(zcs)oftheoutputdiodewasachievedbythehalf-waverectifiercircuitwithafilterinductorandresonantbranchinthesecondarysideoftheAHB—SSR—PWMconverter.Theoutputfilterinductorint
7、heAHB.SSR.PWMconverterreducedtheoutputvoltageripple.TheanalysisresultsshowthattheOUtputdiodevoltagestressisindependentofthedutycycle,andthevoltagegainisalmostlinear,similartothatoftheisolationBuck.typeconverter.Finally,a200Vinput.24V/2AOUtputexperimentalprototypeisbuilttoverify
8、thetheoreticalanalysis.Keywords:AHB-SSR-PWMconverter;a
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