Constant-frequency current slope control for single-phase switch-mode rectifiers without current sensors

Author

Lo, Yu-Kang ; Lia, Neng-Chin

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan

Volume

1

fYear

1998

fDate

31 Aug-4 Sep 1998

Firstpage

559

Abstract

In this paper, we present a novel control scheme for single-phase boost-type switch-mode rectifiers (SMRs). Based on the input current slopes, which depend on the source voltage, output DC level and boost inductance, the duty ratios of the switches are determined to achieve a unity power factor. No current sensors are required. By utilizing the triangular PWM comparators, the proposed control scheme can be fulfilled with a constant switching frequency. This novel control method with low costs and simple circuitry can be applied to any boost-type SMR. Simulations and experiments are performed. The results show feasibility of the presented scheme

Keywords

DC-DC power convertors; PWM power convertors; electric current control; power factor; rectifying circuits; switching circuits; boost inductance; constant switching frequency; constant-frequency current slope control; input current slopes; output DC level; single-phase switch-mode rectifiers; source voltage; switch duty ratios; triangular PWM comparators; unity power factor; Circuit topology; Costs; Equivalent circuits; Inductance; Pulse width modulation; Reactive power; Rectifiers; Switches; Switching frequency; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE

Conference_Location

Aachen

Print_ISBN

0-7803-4503-7

Type

conf

DOI

10.1109/IECON.1998.724304

Filename

724304