Title :
A novel PWM scheme for single-phase three-level power-factor-correction circuit
Author :
Lin, Bor-Ren ; Lu, Hsin-Hung
Author_Institution :
Dept. of Electr. Eng., Nat. Yunlin Univ. of Sci. & Technol., Taiwan
fDate :
4/1/2000 12:00:00 AM
Abstract :
This paper presents a control scheme for a single-phase AC-to-DC power converter with three-level pulsewidth modulation. A single-phase power-factor-correction circuit is proposed to improve the power quality. The hysteresis current control technique for a diode bridge, with two power switches is adopted to achieve a high power factor and low harmonic distortion. A control scheme is presented where the line current is driven to follow the reference sinusoidal current which is derived from the DC-link voltage regulator, the capacitor voltage balance compensator and the output power estimator. The blocking voltage of each power device is clamped to half of the DC-link voltage. The high power factor and low current total harmonic distortion are verified by computer simulations and hardware tests
Keywords :
AC-DC power convertors; PWM power convertors; bridge circuits; electric current control; harmonic distortion; power conversion harmonics; power factor correction; power semiconductor switches; power supply quality; rectifying circuits; switching circuits; AC-to-DC power converter; DC-link voltage regulator; PWM scheme; blocking voltage; capacitor voltage balance compensator; computer simulation; diode bridge; hardware tests; hysteresis current control technique; output power estimator; power quality improvement; power switches; single-phase three-level power-factor-correction circuit; three-level pulsewidth modulation; total harmonic distortion; Bridge circuits; Current control; Diodes; Harmonic distortion; Hysteresis; Power quality; Pulse width modulation; Pulse width modulation converters; Reactive power; Voltage;
Journal_Title :
Industrial Electronics, IEEE Transactions on
