An Improved Z-Source Boost-Buck Rectifier Topology with Lower DC Output Voltage

A Z-source boost-buck rectifier topology has been proposed to overcome the limitation of the conventional voltage source rectifier which is a boost rectifier. Conventional Z-source rectifier topology’s lowest dc output voltage is limited because increasing the shoot-through duty ratio and the modulation index simultaneously to obtain low dc output voltage is contradictory with the principle that the sum of M and D must be lower than 1. To overcome this contradiction, this paper proposes a novel topology for Z-source rectifier which can obtain lower dc output voltage with power factor correction and less input harmonic current. This paper firstly analyzes the proposed topology and makes a comparison with the conventional one. At last, the simulation results will be presented and verify its outstanding buck capability.

[1]  Robert W. Erickson,et al.  Nonlinear-carrier control for high-power-factor boost rectifiers , 1996 .

[2]  F.Z. Peng,et al.  A novel ZVS Z-source rectifier , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[3]  F.Z. Peng,et al.  Z-source inverter , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[4]  Zhaoming Qian,et al.  Transient Modeling and Control of the Novel ZVS Z-Source Rectifier , 2006 .

[5]  Zhaoming Qian,et al.  Three Phase Z-Source Rectifier , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[6]  Poh Chiang Loh,et al.  Pulse-width modulation of Z-source inverters , 2005, IEEE Transactions on Power Electronics.

[7]  R. Wu,et al.  A PWM AC to DC converter with fixed switching frequency , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[8]  Jian Sun,et al.  On the zero-crossing distortion in single-phase PFC converters , 2004, IEEE transactions on power electronics.