function?[sysx0strts]?=?PWM_Generator（txuflag）
switch?flag
??case?0
????[sysx0strts]=mdlInitializeSizes;
??case?1
????sys=[];
??case?2
????sys=[];
??case?3
????sys=mdlOutputs（txu）;
??case?4
????sys=[];
??case?9
????sys=[];
???otherwise
????error（[‘Unhandled?flag?=?‘num2str（flag）]）;
end
%=============================================================================
%?mdlInitializeSizes
function?[sysx0strts]=mdlInitializeSizes

sizes?=?simsizes;

sizes.NumContStates??=?0;
sizes.NumDiscStates??=?0;
sizes.NumOutputs?????=?6;
sizes.NumInputs??????=?3;
sizes.DirFeedthrough?=?1;
sizes.NumSampleTimes?=?1;???%?at?least?one?sample?time?is?needed

sys?=?simsizes（sizes）;
x0??=?[];
str?=?[];
ts??=?[2e-6?0];???????????%每0.002秒算一次，500Hz開關頻率

%=============================================================================
%?mdlOutputs
function?sys=mdlOutputs（txu）
global?Ts?T
global?CMPR_HA??CMPR_HB?CMPR_HC?
global?Sa1?Sa2?Sb1?Sb2?Sc1?Sc2

Ts=0.0005;
T=t-fix（t/Ts）*Ts;

CMPR_HA=u（1）;
CMPR_HB=u（2）;
CMPR_HC=u（3）;

if?t==0
???CMPR_H