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(ASD)ASDASDPQ()dcdcdcASD“”PQPQASD•(SCRs)•PFPWMDPFs()PWM(95%)DPFPFPQ(acdc)SCR/(VSI/VVI)6SCR()(CSISCR)VSICSI(100HP)SCRs()dcSCR1.(VSI)ASD.-www.fluke.com/library2.SCRPQ•SCR“”“”VTHD••57VSI(PWM)PWMPWMdcacIGBTPWM3.ASDPQ6“6”5712-5711131113566PWM55LC()5(280Hz)57deltawyedelta-delta30PCC()ACSourceInductionMotorDiodeRectifierPWMInverter4.(PWM)ASD.2FlukeCorporation12-delta-wye/delta-delta(deltadeltawye)6-12-18-HPacPF(PFDPF)5.WhyTrue-rmsTrue-rmsFlukeWhyTrue-rms,1260729.true-rmsDMMTrue-rmsDMM()10%40%35-30%3FlukeCorporationHotvibes“”PF?PF(DPF)(PF)PFPFWattsVADPF(PF)(PFPF,7)PFDPFDPF“”PFDPFDPF(Volt-AmpReactiveVAR)Volt-Amp(VA)VARWattVARVADPFVARDPF0.900.95VAR(6)PFASDSASDs(657)PF3?(XC=1/2fC):PF=42%:PF=100%165360VAR165360VAR60F1/6HP1/6HP6.(DPF).4FlukeCorporation(XL)PF(XC)XL=XC“”audiobuff“highQ”(8)A.B.8.XC=(XT+XS)PFDPFPF(5)DPFPFDPF()Kvar()VAKW()7.5FlukeCorporation