建模仿真.docx

1、建模仿真1- phase Diode Bridge Rectifiers (DBRECT1)20092408王建辉Nominal Values: Vs(rms)=120V at 60 HzLs=1mHRs=10mLd=1uHCd=1000uFRload=201. Execute DBRECT1 to obtain Vs, is and waveforms.2. From the results of the Fourier analysis contained in the output file DBRECT1.OUT, calculate the input power factor an

2、d the displacement power factor.DC COMPONENT = -6.437959E-01 HARMONIC FREQUENCY FOURIER NORMALIZED PHASE NORMALIZED NO (HZ) COMPONENT COMPONENT (DEG) PHASE (DEG) 1 6.000E+01 1.053E+01 1.000E+00 -1.012E+01 0.000E+00 2 1.200E+02 1.133E+00 1.076E-01 8.844E+01 1.087E+02 3 1.800E+02 8.053E+00 7.648E-01 1

3、.486E+02 1.790E+02 4 2.400E+02 7.412E-01 7.039E-02 -9.389E+01 -5.340E+01 5 3.000E+02 4.459E+00 4.235E-01 -5.685E+01 -6.228E+00 TOTAL HARMONIC DISTORTION = 9.022789E+01 PERCENTTHD=90.23%DPF=0.98PF= =0.733. Make use of the Fourier analysis in DBRECT1.OUT to plot, , and.Superimpose the distortion curre

4、nt component = - on the above plot.4. Calculate (the rms current though the filter capacitor) as a ratio of the average load current.5. Plot the current and voltage associated with one of the diodes, for example, ,and obtain the average and the rms values of the current as a ratio of the average loa

5、d current.6. Vary Ls as a parameter to invest igate its influence on the input displacement power factor, the input power factor, %THD, and the peak-peak ripple in the dc voltage.（1）.Ls=2MhDC COMPONENT = -6.096231E-01 HARMONIC FREQUENCY FOURIER NORMALIZED PHASE NORMALIZED NO (HZ) COMPONENT COMPONENT

6、 (DEG) PHASE (DEG) 1 6.000E+01 9.914E+00 1.000E+00 -1.764E+01 0.000E+00 TOTAL HARMONIC DISTORTION = 7.325412E+01 PERCENTTHD=73.25%DPF=0.95PF= =0.77(2).Ls=3mHDC COMPONENT = -3.405093E-01 HARMONIC FREQUENCY FOURIER NORMALIZED PHASE NORMALIZED NO (HZ) COMPONENT COMPONENT (DEG) PHASE (DEG) 1 6.000E+01 9

7、.488E+00 1.000E+00 -2.196E+01 0.000E+00 TOTAL HARMONIC DISTORTION = 6.357699E+01 PERCENTTHD=63.58%DPF=0.93PF= =0.78the peak-peak ripple in the dc voltage：（From top to bottom, respectively,fortheinductanceLs =1the3mHwaveform）7. Vary the filter capacitor to investigate its influence on the percentage

8、ripple in,input displacement power factor and %THD. Plot the percentageVd(peak-topeak)/Vd(average) as a function of.(1).Cd=500UfDC COMPONENT = -2.267133E-05 HARMONIC FREQUENCY FOURIER NORMALIZED PHASE NORMALIZED NO (HZ) COMPONENT COMPONENT (DEG) PHASE (DEG) 1 6.000E+01 1.075E+01 1.000E+00 5.286E+00

9、0.000E+00 TOTAL HARMONIC DISTORTION = 9.646523E+01 PERCENTTHD=96.47%DPF=0.996PF= =0.72(2).Cd=1000UfDC COMPONENT = -6.437959E-01 HARMONIC FREQUENCY FOURIER NORMALIZED PHASE NORMALIZED NO (HZ) COMPONENT COMPONENT (DEG) PHASE (DEG) 1 6.000E+01 1.053E+01 1.000E+00 -1.012E+01 0.000E+00 TOTAL HARMONIC DIS

10、TORTION = 9.022789E+01 PERCENTTHD=90.23%DPF=0.98PF= =0.73(3).Cd=1500UfDC COMPONENT = 1.844372E-01 HARMONIC FREQUENCY FOURIER NORMALIZED PHASE NORMALIZED NO (HZ) COMPONENT COMPONENT (DEG) PHASE (DEG) 1 6.000E+01 1.065E+01 1.000E+00 -1.430E+01 0.000E+00 TOTAL HARMONIC DISTORTION = 8.640326E+01 PERCENT

11、THD=86.40%DPF=0.97PF= =0.738. Vary the load power to investigate its influence on the average dc voltage.9.In the nominal circuit input file, remove the limit on the maximum time step during the simulation and observe its influence on the circuit waveforms.10. Obtain the Vs, is and waveforms during

12、the startup transient when the filter capacitor is initially not charged. Obtain the peak inrush current as a ratio of the peak current in steady state. Vary the switching instant by simply varying the phase angle of the source.The abscissa is050ms： The abscissa is 020ms：the peak inrush current as a

13、 ratio of the peak current in steady state： The abscissa is050ms： 11. Replace the dc side of the diode bridge by a current source = 10 A, corresponding to a very large Ld. Make Ls almost equal to zero. Obtain The average output voltage waveform is as follows: 12.Make Ls = 3 mH in Problem 10 and obta

14、in (average), displacement power factor, power factor, %THD, and the current commutation interval.Load voltage average：Vs,Is,Vd,waveform as follows:DC COMPONENT = 5.708134E-02 HARMONIC FREQUENCY FOURIER NORMALIZED PHASE NORMALIZED NO (HZ) COMPONENT COMPONENT (DEG) PHASE (DEG) 1 6.000E+01 1.371E+01 1.000E+00 -2.198E+01 0.000E+00 TOTAL HARMONIC DISTORTION = 6.303744E+01 PERCENTTHD=63.04%DPF=0.93PF= =0.79U=0.004236060=90.72