简介:摘要通过对近几年已经发生的电梯剪切事故以及险兆事故不断分析总结后,对制动能力的降低将导致的事故隐患已经得到了制造、安装、维保及检验各环节人员的重视,并且在2017年10月1日开始执行的新检规中,增加了制动力监测和制动器的提起(或者释放)直接检测的项目。通过这一系列的措施,对制动力原因导致的剪切事故将得到有效的遏制。新检规同时对在控制柜执行非法门回路的短接增加了检验要求,该检验内容针对由于人为短接因素导致的门回路失效进行了有效的遏制。但非人为短接的电气回路本身故障导致电梯事故,在电梯事故比例中不容忽视,同时由于该类型故障在电梯使用过程不易非发现,因此更应该引起大家的重视。
简介:ADC/ACconverterforsingle-phasegrid-connectedphotovoltaicsystems-IECON'02;ANEWZVTDC-TO-DCFULLBRIDGECONVERTER;AThree-PhaseAC/ACHigh-FrequencyLinkMatrixConverterforVSCFApplications;Analysisofeffectiveresistanceandeddy-currentlossesinmultiturnwindingofhigh-frequencymagneticcomponents;Bi-polarityphase-shiftedcontrolledvoltagemodeAC/ACconverterswithhighfrequencyaelink;Contactlesspowerandinformationtransmission;
简介:摘 要:.本文结合教学实际,从高频功率放大电路的电路结构、与高频小信号放大器的区别和应用电路几个方面阐述了高频功率放大电路的教学设计。
简介:DoubletwoswitchforwardsoftswitchingPWMDC-DCconverter,Doubletwo-switchforwardtransformerlinkedsoft-switchingPWMDC-DCpowerconverterusingIGBTs,ExperimentalDeterminationofStrayCapacitancesinHighFrequencyTransformers,FullBridgeSoft-SwitchingPhase-ShiftedPWMDC-DCConverterusingTappedInductorFilter
简介:PerformanceevaluationonZCS-PFMseries-resonantDC-DCconverterwithhigh-frequencyhigh-voltagetransformerformagnetrondrive,Powersupplywithhighinsulationcapabilitytofeedelectronicsonthehighpotentialsideinpowerdistributionnetworks,Series-parallelresonantUPSwithcapacitiveoutputDCbusfilterforpoweringHFCnetworks,Soft-switchingphase-shiftedPWMfull-bridgeDC-DCconverterwithreducedconductionlossesnovelsoft-switchingDC-DCconverterusingtappedinductortypefilter,SynthesisandModulationofaSinglePhaseDC/ACConverterwithHigh-FrequencyIsolationinPhotovoltaicEnergyApplications,TransformerParasiticParametersandLosslessInductiveSnubberAssistedZeroCurrentSoftSwitchingDC-DCConverterforHighPowerMagnetronDrive。