A new control scheme for single-phase PWM multilevel rectifier with power-factor correction

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 pr...

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Vydáno v:IEEE transactions on industrial electronics (1982) Ročník 46; číslo 4; s. 820 - 829
Hlavní autoři: Lin, Bor-Ren, Lu, Hsin-Hung
Médium: Journal Article
Jazyk:angličtina
Vydáno: IEEE 01.08.1999
Témata:
Alternating current
Bridge circuits
Commands
Current supplies
Diodes
Electric potential
Harmonics
Power factor
Power generation
Power system harmonics
Pulse duration modulation
Pulse width modulation
Reactive power
Rectifiers
Space vector pulse width modulation
Voltage
ISSN:0278-0046
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Popis
Shrnutí: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, /spl plusmn/V/sub DC//2, /spl plusmn/V/sub DC/) 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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ISSN:0278-0046
DOI:10.1109/41.778250