A new control scheme for single-phase PWM multilevel rectifier withpower-factor correction
Bor-Ren Lin
Hsin-Hung Lu
Dept. of Electr. Eng., Nat. Yunlin Univ. of Sci. & Technol;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug 1999
Volume: 46,
Issue: 4
On page(s): 820-829
ISSN: 0278-0046
References Cited: 11
CODEN: ITIED6
INSPEC Accession Number: 6348054
Digital Object Identifier: 10.1109/41.778250
Current Version Published: 2002-08-06
Abstract
A new control scheme for a single-phase bridge rectifier with
three-level pulsewidth modulation is proposed to achieve high power
factor and low current distortion. The main circuit consists of a
diode-bridge rectifier, a boost inductor, two AC power switches, and two
capacitors. According to the proposed control scheme based on a voltage
comparator and hysteresis current control technique, the output
capacitor voltages are balanced and the line current will follow the
supply current command. The supply current command is derived from a
DC-link voltage regulator and an output power estimator. The major
advantage of using a three-level rectifier is that the blocking voltage
of each AC power device is clamping to half of the DC-link voltage and
the generated harmonics of the three-level rectifier are less than those
of the conventional two-level rectifier. There are five voltage levels
(0, ±VDC/2, ±VDC) on the AC side of
the diode rectifier. The high power factor and low harmonic currents at
the input of the rectifier are verified by software simulations and
experimental tests
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