High Power Factor Operation of a Three-Phase Rectifier for an Adjustable-Speed Drive
Suryawanshi, H.M.
Kulwal, A.K.
Chaudhari, M.A.
Borghate, V.B.
Visvesvaraya Nat. Inst. of Technol., Nagpur;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: April 2008
Volume: 55,
Issue: 4
On page(s): 1637-1646
ISSN: 0278-0046
INSPEC Accession Number: 9920941
Digital Object Identifier: 10.1109/TIE.2008.917110
Current Version Published: 2008-04-04
Abstract
This paper presents a novel approach to improve the power factor (PF) and reduce the harmonics generated by an adjustable-speed drive (ASD). A high-frequency (HF) current injection technique is used to improve the PF and harmonic performance. The HF current at the same switching frequency (33 kHz) is injected into the input of a front-end rectifier from the output of an HF inverter. The main feature of the circuit is that it does not require any additional active devices for current injection. The inverter driving the induction motor is operated using a sinusoidal pulsewidth-modulation technique. The circuit simulation and experimental prototype results are presented for 67-hp (50 kW) and 3-hp three-phase induction motors, respectively.
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