NDLI: A novel voltage sensorless control technique for a bidirectional AC/DC converter

Content Provider	IEEE Xplore Digital Library
Author	Yip, S.C. Qiu, D.Y. Chung, H.S.H. Hui, S.Y.R.
Copyright Year	2001
Description	Author affiliation: Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China (Yip, S.C.)
Abstract	A novel voltage sensorless control technique for a bidirectional AC/DC converter is presented. Only a single current sensor that measures the inductor current is needed in the whole system. The sensed inductor current is used for two functions. The first one is for shaping the current waveform at the AC side and the second one is for deriving the inductor voltage by determining the rate of change of the inductor current. The AC- and DC-side voltages, which are used for AC current synchronization and DC voltage regulation, respectively, are obtained by extracting the envelopes of the derived inductor voltage. Apart from reducing the number of sensing elements, the proposed method has additional advantages of (1) providing inherent electrical isolation and reducing noise coupling between the power circuit and the controller, and (2) having wide operating range. Design criteria for the differentiator and envelope detector circuit are described. The applicability of the proposed method is verified with the experimental results of a prototype.
Starting Page	1899
Ending Page	1904
File Size	526196
Page Count	6
File Format	PDF
ISBN	0780370678
ISSN	02759306
DOI	10.1109/PESC.2001.954399
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-17
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensorless control Inductors DC-DC power converters Sensor systems Current measurement Voltage control Noise reduction Circuit noise Coupling circuits Envelope detectors
Content Type	Text
Resource Type	Article

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