SPWM (2).rar_SPWM仿真_SPWM逆变仿真_spwm_spwm的数学模型_逆变器spwm模块

%参数输入 Ud=390;F1=50;h=0.00001;Tend=1.2/F1; Kf=21;Ka=4/3;%载波比Kf和调制比Ka(Ka>1) F2=Kf*F1; T1=1/F1; T2=1/F2; P(1)=0; P(2)=2*pi/3; P(3)=4*pi/3; %主程序 t=0; i=1; while t<=Tend tt2=mod(t,T2); if tt2<=T2/2 A2=Ka*(4*tt2/T2-1); else A2=Ka*(-4*tt2/T2+3); end for k=1:3 A1=sin(2.*pi*t/T1-P(k)); if A1>A2 S(k)=1; else S(k)=-1; end end %逆变器输出线电压（负载电动机线电压） Uab=(S(1)-S(2))*Ud/2; Ubc=(S(2)-S(3))*Ud/2; Uca=(S(3)-S(1))*Ud/2; %逆变器输出端至直流电源中性点的电压 Uag=S(1)*Ud/2; Ubg=S(2)*Ud/2; Ucg=S(3)*Ud/2; %负载电动机相电压 Ua0=(2*Uag-Ubg-Ucg)/3; Ub0=(-Uag+2*Ubg-Ucg)/3; Uc0=(-Uag-Ubg+2*Ucg)/3; %-------------------------------------------------------------------------- tx(i)=t; Uaby(i)=Uab; Ubcy(i)=Ubc; Ucay(i)=Uca; Uagy(i)=Uag; Ubgy(i)=Ubg; Ucgy(i)=Ucg; Ua0y(i)=Ua0; Ub0y(i)=Ub0; Uc0y(i)=Uc0; A1y(i)=A1; A2y(i)=A2; t=t+h; i=i+1; end %-------------------------------------------------------------------------- figure(1);plot(tx,Uaby),title('AB线电压');xlabel('t(s)');ylabel('Uab');grid; figure(2);plot(tx,Ubcy),title('BC线电压');xlabel('t(s)');ylabel('Ubc');grid; figure(3);plot(tx,Ucay),title('CA线电压');xlabel('t(s)');ylabel('Uca');grid; figure(4);plot(tx,Uagy),title('AG电压');xlabel('t(s)');ylabel('Uag');grid; figure(5);plot(tx,Ubgy),title('BG电压');xlabel('t(s)');ylabel('Ubg');grid; figure(6);plot(tx,Ucgy),title('CG电压');xlabel('t(s)');ylabel('Ucg');grid; figure(7);plot(tx,Ua0y),title('A相电压');xlabel('t(s)');ylabel('Ua0');grid; figure(8);plot(tx,Ub0y),title('B相电压');xlabel('t(s)');ylabel('Ub0');grid; figure(9);plot(tx,Uc0y),title('C相电压');xlabel('t(s)');ylabel('Uc0');grid;