iAOn-stateoff-to-onUAK0ForwardReverseblockingblockingIdealizedcharacteristics
Idealized characteristics
4Specificationsofthyristor（晶闸管的主要参数）·Peakrepetitiveforwardblockingvoltage（正向重复峰值压)---VpRM; define: VpRM =90%VpsM·Peakrepetitivereverseblockingvoltage（反向重复幢电压=--VRRM;define:VRRM =90%VRSM· define: Rated Voltage VR =MIN(VpRM, VRRM) ☆·Peakon-statevoltagedrop(通态(峰值)电压)---VTM·Rated current l orAverage on-state current(通态平地流)---IAV☆·Peak forward surge current (浪涌电流)---ItsMITsm=4元lAVorlarger
4 Specifications of thyristor (晶闸管的主要参数) •Peak repetitive forward blocking voltage (正向重复峰 值电压)-VDRM；define: VDRM =90%VDSM •Peak repetitive reverse blocking voltage (反向重复 峰值电压) -VRRM；define: VRRM =90% VRSM • define: Rated Voltage VR =MIN(VDRM, VRRM) ☆ • Peak on-state voltage drop (通态(峰值)电压)-VTM •Rated current IR or Average on-state current (通态平 均电流)-IAV☆ • Peak forward surge current (浪涌电流)-ITSM ITSM= 4IAV or larger
Supplemental material>Supplemental material---Averaae on-state current (通态平均电流)---IT(AV)7AV2元7wt1元Tmsin @tdot =AVn2元JO元1m(Im sin ot) d(ot) =rms22元11.57元
AV m I I I sintdt = m 0 = 1 0 2 m rms 2 I = I (I sin ωt) 2 d (ωt) = m 1 2 I AV I = 2 I= 1.57 Supplemental material ➢Supplemental material-Average on-state current (通 态平均电流)-IT(AV) IAV
Supplemental materialConsideration:The current waveform flowingthrougha SCR is showed as below, Im=300A. Whatis the ratedcurrent value of the SCR?irtTSolution 1:Im1201m-100A136000120°240°360°wtSolution2:)=m=100/3A)? d(ot)nV3o2元11110AAV1.57Which one is right?
Solution 2: I 3A 0 3 (I ) 2 d(ωt) = m = 100 m I = 2 1 2 I 1.57 AV 3 I = = 110 A I AV 360 = =100A 120Im Which one is right? Supplemental material Consideration: The current waveform flowing through a SCR is showed as below, Im=300A. What is the rated current value of the SCR? Solution 1: