建模仿真.docx

建模仿真.docx

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建模仿真

1-phaseDiodeBridgeRectifiers（DBRECT1）

20092408

王建辉

NominalValues:

Vs（rms）=120Vat60Hz

Ls=1mH

Rs=10mΩ

Ld=1uH

Cd=1000uF

Rload=20Ω

1.ExecuteDBRECT1toobtainVs,

isand

waveforms.

2.FromtheresultsoftheFourieranalysiscontainedintheoutputfileDBRECT1.OUT,calculatetheinputpowerfactorandthedisplacementpowerfactor.

DCCOMPONENT=-6.437959E-01

HARMONICFREQUENCYFOURIERNORMALIZEDPHASENORMALIZED

NO（HZ）COMPONENTCOMPONENT（DEG）PHASE（DEG）

16.000E+011.053E+011.000E+00-1.012E+010.000E+00

21.200E+021.133E+001.076E-018.844E+011.087E+02

31.800E+028.053E+007.648E-011.486E+021.790E+02

42.400E+027.412E-017.039E-02-9.389E+01-5.340E+01

53.000E+024.459E+004.235E-01-5.685E+01-6.228E+00

TOTALHARMONICDISTORTION=9.022789E+01PERCENT

THD=90.23%

DPF=

=0.98

PF=

=0.73

3.MakeuseoftheFourieranalysisinDBRECT1.OUTtoplot

and

.Superimposethedistortioncurrentcomponent

=

-

ontheaboveplot.

4.Calculate

（thermscurrentthoughthefiltercapacitor）asaratiooftheaverageloadcurrent

.

5.Plotthecurrentandvoltageassociatedwithoneofthediodes,forexample,

andobtaintheaverageandthermsvaluesofthecurrentasaratiooftheaverageloadcurrent.

6.VaryLsasaparametertoinvestigateitsinfluenceontheinputdisplacementpowerfactor,theinputpowerfactor,%THD,andthepeak-peakrippleinthedcvoltage

.

（1）.Ls=2Mh

DCCOMPONENT=-6.096231E-01

HARMONICFREQUENCYFOURIERNORMALIZEDPHASENORMALIZED

NO（HZ）COMPONENTCOMPONENT（DEG）PHASE（DEG）

16.000E+019.914E+001.000E+00-1.764E+010.000E+00

TOTALHARMONICDISTORTION=7.325412E+01PERCENT

THD=73.25%

DPF=

=0.95

PF=

=0.77

（2）.Ls=3mH

DCCOMPONENT=-3.405093E-01

HARMONICFREQUENCYFOURIERNORMALIZEDPHASENORMALIZED

NO（HZ）COMPONENTCOMPONENT（DEG）PHASE（DEG）

16.000E+019.488E+001.000E+00-2.196E+010.000E+00

TOTALHARMONICDISTORTION=6.357699E+01PERCENT

THD=63.58%

DPF=

=0.93

PF=

=0.78

thepeak-peakrippleinthedcvoltage

：

（Fromtoptobottom,respectively, for the inductance Ls= 1 the ~ 3mH waveform）

7.Varythefiltercapacitor

toinvestigateitsinfluenceonthepercentageripplein

inputdisplacementpowerfactorand%THD.Plotthepercentage∆Vd（peak-topeak）/Vd（average）asafunctionof

.

（1）.Cd=500Uf

DCCOMPONENT=-2.267133E-05

HARMONICFREQUENCYFOURIERNORMALIZEDPHASENORMALIZED

NO（HZ）COMPONENTCOMPONENT（DEG）PHASE（DEG）

16.000E+011.075E+011.000E+005.286E+000.000E+00

TOTALHARMONICDISTORTION=9.646523E+01PERCENT

THD=96.47%

DPF=

=0.996

PF=

=0.72

（2）.Cd=1000Uf

DCCOMPONENT=-6.437959E-01

HARMONICFREQUENCYFOURIERNORMALIZEDPHASENORMALIZED

NO（HZ）COMPONENTCOMPONENT（DEG）PHASE（DEG）

16.000E+011.053E+011.000E+00-1.012E+010.000E+00

TOTALHARMONICDISTORTION=9.022789E+01PERCENT

THD=90.23%

DPF=

=0.98

PF=

=0.73

（3）.Cd=1500Uf

DCCOMPONENT=1.844372E-01

HARMONICFREQUENCYFOURIERNORMALIZEDPHASENORMALIZED

NO（HZ）COMPONENTCOMPONENT（DEG）PHASE（DEG）

16.000E+011.065E+011.000E+00-1.430E+010.000E+00

TOTALHARMONICDISTORTION=8.640326E+01PERCENT

THD=86.40%

DPF=

=0.97

PF=

=0.73

8.Varytheloadpowertoinvestigateitsinfluenceontheaveragedcvoltage.

9.Inthenominalcircuitinputfile,removethelimitonthemaximumtimestepduringthesimulationandobserveitsinfluenceonthecircuitwaveforms.

10.ObtaintheVs,isand

waveformsduringthestartuptransientwhenthefiltercapacitorisinitiallynotcharged.Obtainthepeakinrushcurrentasaratioofthepeakcurrentinsteadystate.Varytheswitchinginstantbysimplyvaryingthephaseangleθofthesource

.

Theabscissais0~50ms：

Theabscissais0~20ms：

thepeakinrushcurrentasaratioofthepeakcurrentinsteadystate：

Theabscissais0~50ms：

11.Replacethedcsideofthediodebridgebyacurrentsource

=10A,correspondingtoaverylargeLd.MakeLsalmostequaltozero.Obtain

Theaverageoutputvoltagewaveformisasfollows:

12.MakeLs=3mHinProblem10andobtain

（average）,displacementpowerfactor,powerfactor,%THD,andthecurrentcommutationinterval.

Loadvoltageaverage：

Vs,Is,Vd,waveformasfollows:

DCCOMPONENT=5.708134E-02

HARMONICFREQUENCYFOURIERNORMALIZEDPHASENORMALIZED

NO（HZ）COMPONENTCOMPONENT（DEG）PHASE（DEG）

16.000E+011.371E+011.000E+00-2.198E+010.000E+00

TOTALHARMONICDISTORTION=6.303744E+01PERCENT

THD=63.04%

DPF=

=0.93

PF=

=0.79

U=0.0042×360×60=90.72