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文章 407
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阅读 850719
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原创 6点日记20130813

 2014-1-25 02:36  781 8 8 分类: 工程师职场文集: 6点日记

SVPWM

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%% Name : SVGEN

%% Author : tam

%% Date : 20130812

%% Description : SVPWM generator

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

clear;clc;clf;

time=1:1:360;

for theta=1:1:360;

theta_rad=theta/180*pi;

sin_theta=sin(theta_rad);

cos_theta=cos(theta_rad);

u_alfa=0.1*cos_theta-0.3*sin_theta;

u_beta=0.1*sin_theta+0.3*cos_theta;

tmp1=u_beta;

tmp2=0.5*u_beta+sqrt(3)/2*u_alfa;

tmp3=tmp2-tmp1;

sector=3;

if(tmp2>0) sector=sector-1;

end

if(tmp3>0) sector=sector-1;

end

if(tmp1<0) sector=7-sector;

end

if(sector==1||sector==4)

Ta= tmp2;

Tb= tmp1-tmp3;

Tc=-tmp2;

elseif(sector==2||sector==5)

Ta= tmp3+tmp2;

Tb= tmp1;

Tc=-tmp1;

elseif(sector==3||sector==6)

Ta= tmp3;

Tb=-tmp3;

Tc=-(tmp1+tmp2);

end

y_u_alfa(theta,1)=u_alfa;

y_u_beta(theta,1)=u_beta;

y_tmp1(theta,1)=tmp1;

y_tmp2(theta,1)=tmp2;

y_tmp3(theta,1)=tmp3;

y_sector(theta,1)=sector;

y_Ta(theta,1)=Ta;

y_Tb(theta,1)=Tb;

y_Tc(theta,1)=Tc;

end

figure(1);

subplot(221);

plot(time,y_u_alfa,'r',time,y_u_beta,'b');

xlabel('Ualfa,Ubeta');

subplot(222);

plot(time,y_tmp1,'r',time,y_tmp2,'b',time,y_tmp3,'g');

xlabel('tmp1,tmp2,tmp3');

subplot(223);

plot(time,y_sector);

xlabel('sector');

subplot(224);

plot(time,y_Ta,'r',time,y_Tb,'b',time,y_Tc,'g');

xlabel('Ta,Tb,Tc');

figure(2);

set(gcf,'Color','w');

line([-0.25,1.25],[0,0],'Color','k');

line([0.5,0.5],[-1,-0.5],'Color','k');

line([0,0],[-1,0.5],'Color','k');

line([1,1],[-1,0.5],'Color','k');

line([-0.25,0],[0,0.5]);

line([0,0.5],[0.5,-0.5]);

line([0.5,1],[-0.5,0.5]);

line([1,1.25],[0.5,0]);

line([-0.25,1.25],[y_Ta(1,1),y_Ta(1,1)],'Color','r');

line([-0.25,1.25],[y_Tb(1,1),y_Tb(1,1)],'Color','r');

line([-0.25,1.25],[y_Tc(1,1),y_Tc(1,1)],'Color','r');

line([-0.25,1.25],[-1,-1],'Color','k');

line([0.1,0.1],[0.3017,-1],'Color','g');

line([0.17,0.17],[0.1641,-1],'Color','g');

line([0.4,0.4],[-0.3017,-1],'Color','g');

line([0.6,0.6],[-0.3017,-1],'Color','g');

line([0.83,0.83],[0.1641,-1],'Color','g');

line([0.9,0.9],[0.3017,-1],'Color','g');

%PWM1

line([0,0.17],[-0.7,-0.7],'Color','m');

line([0.17,0.83],[-0.65,-0.65],'Color','m');

line([0.83,1],[-0.7,-0.7],'Color','m');

line([0.17,0.17],[-0.7,-0.65],'Color','m');

line([0.83,0.83],[-0.7,-0.65],'Color','m');

%PWM2

line([0,0.1],[-0.8,-0.8],'Color','m');

line([0.1,0.9],[-0.75,-0.75],'Color','m');

line([0.9,1],[-0.8,-0.8],'Color','m');

line([0.1,0.1],[-0.8,-0.75],'Color','m');

line([0.9,0.9],[-0.8,-0.75],'Color','m');

%PWM3

line([0,0.4],[-0.9,-0.9],'Color','m');

line([0.4,0.6],[-0.85,-0.85],'Color','m');

line([0.6,1],[-0.9,-0.9],'Color','m');

line([0.4,0.4],[-0.9,-0.85],'Color','m');

line([0.6,0.6],[-0.9,-0.85],'Color','m');

text(-0.05,0.1841,'Ta');

text(-0.05,0.3217,'Tb');

text(-0.05,-0.2817,'Tc');

text(-0.1,-0.7,'PWM1');

text(-0.1,-0.8,'PWM2');

text(-0.1,-0.9,'PWM3');

line([0.17,0.19],[-0.7,-0.7],'Color','c');

line([0.19,0.19],[-0.7,-0.65],'Color','c');

line([0.83,0.85],[-0.65,-0.65],'Color','c');

line([0.85,0.85],[-0.7,-0.65],'Color','c');

line([0.1,0.12],[-0.8,-0.8],'Color','c');

line([0.12,0.12],[-0.8,-0.75],'Color','c');

line([0.9,0.92],[-0.75,-0.75],'Color','c');

line([0.92,0.92],[-0.8,-0.75],'Color','c');

line([0.4,0.42],[-0.9,-0.9],'Color','c');

line([0.42,0.42],[-0.9,-0.85],'Color','c');

line([0.6,0.62],[-0.85,-0.85],'Color','c');

line([0.62,0.62],[-0.9,-0.85],'Color','c');

%%%%%%%%%%%%% The end of the program %%%%%%%%%%%

这是TI用于产生SVPWM的程序，为了理解我将其翻译成了Matlab程序。之前尝试过一次，没能成功，昨晚竟然自然而然地又走到了这个程序。终于成功。发现之前失败的原因是Matlab程序里面的一个数据在360个循环里面只记录了一个数据，我将其改成数组，每次循环都存一次运算结果，最后就成功地得到360个数据。可以正常显示了。

tam