Title :
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
fDate :
31 Aug-4 Sep 1998
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;
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
DOI :
10.1109/IECON.1998.724304
