MATLAB Simulation And Analysis of Bridgeless PFC Boost Converter

MATLAB Simulation And Analysis of Bridgeless PFC Boost Converter

CONTENTS1.1 Introduction1.2 Objective2.1 Boost converter2.2 Conventional PFC rectifier2.3 Bridgeless PFC rectifier2.4 Closed loop controlled Bridgeless PFC rectifier

RESULT AND DISCUSSION

3.0 Simulation and Result

CONCLUSION

REFERENCES

1.1 Introduction

Power-factor correction has been an active research topic in power electronics, and

significant efforts have been made on the developments of the PFC converters. Recently,

in an effort to improve the efficiency of the PFC rectifiers bridgeless PFC circuits are

being used. The bridgeless PFC topologies, also referred as dual boost PFC rectifiers,

may reduce the conduction loss by reducing the number of semiconductor components in

the conduction path. The simulation of conventional PFC rectifier, bridgeless PFC boost

rectifier is done using matlab and simulated waveforms are shown.

1.2 Objective of Project

The objective of the study are:

1. To design a boost converter and simulate conventional PFC rectifier circuit.

2. To simulate bridgeless PFC rectifier instead of conventional PFC rectifier circuit.

2.1 Boost converter

Vin = 26V

Vout = 48V

D = 0.5

Switching frequency = 40Khz

L = 100uH

C = 6800uF

FIG 1: BOOST CONVERTER CIRCUIT

2.2 Conventional PFC rectifier

FIG 2:CONVENTIONAL PFC RECTIFIER

FIG 3 OUTPUT CURRENT AND OUTPUT VOLTAGE WAVEFORMS

FIG 4 AC INPUT CURRENT AND VOLTAGE WAVEFORMS.

2.3 Bridgeless PFC Rectifier

FIG 5 BRIDGELESS PFC RECTIFIER

FIG 6 AC INPUT VOLTAGE AND CURRENT WAVEFORM 2.4 Closed loop controlled Bridgeless PFC Rectifier

FIG 7: Closed loop controlled Bridgeless PFC Rectifier

FIG 8 AC INPUT VOLTAGE AND CURRENT WAVEFORMS

FIG 9 OUTPUT VOLTAGE WAVEFORM

3.0 Simulation and Result

Sl NoMethodP.F

1Conventional PFC RectifierLow

2Bridgeless PFC RectifierImproved

From the simulated waveforms we can see the power-factor has been improved in Bridgeless PFC Rectifier and ripple at the output voltage has reduced in closed loop control. The number of conducting semiconductor switches has been reduced as a result switching losses are also reduced in the Bridgeless PFC Rectifier.

CONCLUSIONBridgeless PFC Converter is modeled and simulated using Matlab. The simulation studies indicate the power factor is nearly unity by employing the modified boost converter. This converter has advantages like reduced hardware, High performance and improved power factor. This work has covered the simulation of open loop and closed loop controlled PFC converter.

REFERENCES

1. J. C. Salmon, Circuit topologies for single phase voltage-doubler boost rectifiers, in Proc.IEEE Applied Power Electronics Conf., Mar. 1992, pp. 549-556.

2. D. Tollik and A. Pietkiewicz, Comparative analysis of 1-phase active power factor correction topologies, in Proc. Int. Telecommunication Energy Conf., Oct. 1992, pp. 517-523.

3. P. N. Enjeti and R. Martinez, A high performance single phase AC to DC rectifier with input power factor correction, in Proc.IEEE Applied Power Electronics Conf., Mar.1993, pp. 190-195.

4. A. F. Souza and I. Barbi, A new ZCS quasi-resonant unity power factor rectifier with reduced conduction losses, in Proc. IEEE Power Electronics Specialists Conf., Jun. 1995, pp.1171-1177.

5. A. F. Souza and I. Barbi, A new ZVS-PWM unity power factor rectifier with reduced conduction losses, IEEE Trans. Power Electro., vol. 10, no 6, pp. 746-752, Nov. 1995.

6. R. Martinez and P. N. Enjeti, A high performance single phase AC to DC rectifier with input power factor correction, IEEE Trans. Power Electron., vol. 11, no. 2, pp.311-317, Mar. 1996.

7. A. F. Souza and I. Barbi, A new ZVS semi resonant high power factor rectifier with reduced conduction losses, IEEE Trans. Ind. Electron., vol.46, no. 1, pp. 82-90, Feb. 1999.

8. J.-W. Lim and B.-H. Kwon, A power-factor controller for single phase PWM rectifier IEEE Trans. Ind. Electron., vol. 46, no. 5, pp.10351037, Oct. 1999

Dept of EEE, UVCE.Page 2