%==========================================================================
%確定比較器切換點Tcm1Tcm2Tcm3
%September?17?2009
%Southeast?University?Zhou?Mingming
%==========================================================================
function?[sysx0strts]?=switch_time（txuflag）
switch?flag
??case?0
????[sysx0strts]=mdlInitializeSizes;
??case?2
????sys=mdlUpdate（txu）;
??case?3
????sys=mdlOutputs（txu）;?
??case?4
????sys=mdlGetTimeOfNextVarHit（txu）;%Return?next?time?hit?for?variable?step?sample?time?in?SYS
??????????????????????????????????????%計算下一次的采樣時間（Just?only?for?離散系統）
??case?{19}
????sys=[];
??otherwise
????DAStudio.error（‘Simulink:blocks:unhandledFlag‘?num2str（flag））;
end
%=============================================================================
%?mdlInitializeSizes
%?Return?the?sizes?initial?conditions?and?sample?times?for?the?S-function.
%=============================================================================
function?[sysx0strts]=mdlInitializeSizes

sizes?=?simsizes;

sizes.NumContStates??=?0;
sizes.NumDiscStates??=?1;??%離散狀態變量的個數
sizes.NumOutputs?????=?3;
sizes.NumInputs???????=3;
sizes.DirFeedthrough?=?0;
sizes.NumSampleTimes?=?1;???

sys?=?simsizes（sizes）;
x0??=?[0];
str?=?[];
ts??=?[-2?0];

%=============================================================================
%更新狀態變量
%?其中：u（1）為Ualfa電壓矢量
%???????u（2）為Ubeta電壓矢量
%???????u（3）為檢測到的直流母線電壓。????
%???????x（1）指6個扇區：123456?
%???????x（3）指合成的空間電壓矢量在一個扇區的相對角度（θ-k*60）為角度值。運算時要變換為弧度值（θ-k*60）*pi/180

function?sys=mdlUpdate（txu）??
if??u（2）>0
????A=1;
else
????A=0;
end
if?（0.8660*u（1）-0.5*u（2））>0
????B=1;
else
????B=0;
end
if?（-0.8660*u（1）-0.5*u（2））>0
????C=1;
else
????C=0;
end
x（1）?=?A+2*B+4*C;?????????????%扇區號N=A+2B+4C????????????????
sys=x;
?
?
%=============================================================================
%?計算輸出時間
function?sys=mdlOutputs（txu）
T=0.0001;????%SVPWM波的開關周期
X=1.7321*u（2）*T/u（3）;
Y=（0.8660*u（2）+1.5*u（1））*T/u（3）;
Z=（-0.8660*u（2）-1.5*u（1））*T/u（3）;
switch?x（1）
????case?1
????????T1?=?ZT2=Y;
????case?2
????????T1?=?YT2=-X;
????case?3
????????T1?=?-ZT2=X;
????case?4
????????T1?=?-XT2=Z;
????case?5
????????T1?=?XT2=-Y;
????case?6
????????T1?=?-YT2=-Z;
end

if?T<（T1+T2）
????T1=T1*T/（T1+T2）;
????T2=T2*T/（T1+T2）;
end

Ta=（T-T1-T2）/4;
Tb=Ta+T1/2;
Tc=Tb+T2/2;

switch?x（1）?
????case?1
?????????state=[TbTaTc];??????
????case?2
?????????state=[TaTcTb];??
????case?3
?????????state=[TaTbTc];?
????case?4
?????????state=[TcTbTa];
????case?5
?????????state=[TcTaTb];
????case?6
?????????state=[TbTcTa];???
end
?????????sys=state;
?????????
?%=============================================================================
?%計算下一采樣時間點
?function?sys=mdlGetTimeOfNextVarHit（txu）
?sampletime=0.0001;
?sys=t+sampletime;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\1\
?????文件??????116188??2009-02-23?10:46??PMSM多個仿真文件\1\tongbu.mdl
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\10\
?????文件???????37918??2009-09-18?20:06??PMSM多個仿真文件\10\SVPWM.mdl
?????文件????????3049??2009-09-17?12:13??PMSM多個仿真文件\10\switch_time.m
?????文件??????367421??2009-09-13?15:29??PMSM多個仿真文件\10\電壓空間矢量脈寬調制SVPWM算法仿真實現及分析.pdf
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\11\
?????文件??????132501??2006-03-15?15:13??PMSM多個仿真文件\11\空間矢量PWM的SIMUlink仿真.PDF
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\12\
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\12\MATLAB_SMUlink_PMSM_mdl\
?????文件???????94836??2007-03-13?09:58??PMSM多個仿真文件\12\MATLAB_SMUlink_PMSM_mdl\pmsm_spwm.mdl
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\13\
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\13\三相整流控制\
?????文件??????118547??2012-10-19?20:30??PMSM多個仿真文件\13\三相整流控制\dsy.mdl
?????文件??????124734??2012-10-04?20:16??PMSM多個仿真文件\13\三相整流控制\dsy.mdl.original
?????文件??????110292??2012-05-09?15:15??PMSM多個仿真文件\13\三相整流控制\fxx.mdl
?????文件????????8243??2012-04-19?09:44??PMSM多個仿真文件\13\三相整流控制\svpwm.c
?????文件???????17920??2009-05-03?19:09??PMSM多個仿真文件\13\三相整流控制\svpwm.dll
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\14\
?????文件???????21065??2012-01-02?20:39??PMSM多個仿真文件\14\svpwm.c
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\15\
?????文件??????339092??2009-10-01?11:57??PMSM多個仿真文件\15\svpwm.pdf
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\16\
?????文件??????154142??2009-04-13?10:06??PMSM多個仿真文件\16\SVPWM.mdl
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\17\
?????文件??????351542??2011-02-01?15:51??PMSM多個仿真文件\17\Plecs_svm.pdf
?????文件???????38156??2011-02-01?16:03??PMSM多個仿真文件\17\SpaceVectorControl.mdl
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\18\
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\18\raccel\
?????目錄???????????0??2016-02-05?15:42??PMSM多個仿真文件\18\raccel\_sharedutils\
?????目錄???????????0??2016-02-13?12:53??PMSM多個仿真文件\18\raccel\SVPWM\
............此處省略151個文件信息