Single current sensor control for single-phase active power factor correction

This paper presents the realization of a boost-type active power factor corrector (APFC) using a single current sensor to sense the inductor current for input current shaping and output voltage regulation. Neither input voltage nor output voltage sensing is needed. The sensed inductor current is use...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2002-09, Vol.17 (5), p.623-632
Main Authors: Qiu, D.-Y., Yip, S.-C., Chung, H.S.H., Hui, S.Y.R.
Format: Article
Language:English
Subjects:
Active control
Current control
Electric potential
Electric power generation
Electrical engineering
Electronics
Inductors
Power conversion
Power factor
Power factor correction
Power supply
Pulse width modulation
Reactive power
Sampling methods
Sensors
Switched-mode power supply
Switches
Theory
Voltage
Voltage control
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Summary:This paper presents the realization of a boost-type active power factor corrector (APFC) using a single current sensor to sense the inductor current for input current shaping and output voltage regulation. Neither input voltage nor output voltage sensing is needed. The sensed inductor current is used for two main functions. The first one is for comparing with a sawtooth signal in order to shape the input current waveform. The second one is for determining the input and output voltages by processing the rate of change of the inductor current when the main switch is in on and off states, respectively. Compared with conventional APFCs, the proposed technique has several advantages. First, no dissipative voltage divider is required. Second, electrical isolation between the power conversion stage and the control stage can be achieved inherently. Finally, no complicated or sophisticated digital sampling and numerical computations are needed. The applicability and accuracy of the proposed technique have been studied experimentally. Steady-state behavior and large-signal response under output load disturbance are also investigated.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2002.802173