《电机控制》试卷-A卷-2014年-12级-答案

,2014A1.2.34.100120/////10/10//10/20//6/30//3/40/10011012MT345678GTO9CFPWM10220A1ABCDAB2PWM_____________________12()A.B.C.D.D3TMM/TA.TB.MC.M/TD.ACD4A.B.IC.PID.PIID5A.B.C.D.ABCD6PIA.B.C.D.ABCD7A.B.C.D.AD8V-MABCASRDC9A11ωUB1ωgEC1ωrED11ωIBC10A111B110C001D0005301.3-23-3ASRACRPI1ASRUim*=6VIdm=20A2Un*=10Vn=1000r/min1β2α2PI12123.134VM1ab2VM5.1V/fE/f26.1240120.nN=1500r/minΔnN=125r/min1sΔnN43(1)D=nN*s/ΔnN/(1-s)=1500*0.2/125/(1-0.2)=300/(125*0.8)=3(2)ΔnN*D/nN=s/(1-s)=s=ΔnN*D/nN/(1+ΔnN*D/nN)=ΔnN*D/(nN+ΔnN*D)=125*8/(1500+125*8)=1000/2500=40%(3)ΔnN=nN/D*s/(1-s)=1500/8*0.2/(1-0.2)=300/6.4=46.875(r/min)(4)ΔnNclose=ΔnNopen/(1+K)K=ΔnNopen/ΔnNclose=125/46.875=2.672.(10)PIKp+KI/sKp=100Ki1000R0=40kΩR1C1i=Uin/R0Uex=-i*R1-1/C1idt=-Uin*R1/R0-Uin/R0/C1idtKp=R1/R0Ki=1/R0/C1R1=Kp*R0=40k*100=4M(Ω)C1=1/R0/Ki=1/40k/1000=0.025μ(F)dU22dsUu=s012sin()3duTtUπθ=−s022usindTtUθ=6πθ=t1=t2=1/4ms2100ttTt−−==0.5ms131/8ms,u30101/8ms,u00000.5ms,u30101/8ms,1/8ms,u30101/8ms,1/8ms,u71110.5ms,1/8ms,u30101/8ms,2ABC1