Title :
Multilevel PWM for single-phase power factor pre-regulator
Author :
Lin, Bor-Ren ; Lu, Hsin-Hung
Author_Institution :
Dept. of Electr. Eng., Nat. Yunlin Univ. of Sci. & Technol., Taiwan
Abstract :
A new single-phase bridge rectifier with three-level pulse width modulation (PWM) is proposed. A power factor corrector to improve the power quality is presented. The hysteresis current control (HCC) technique for a bridge rectifier with two AC power switches is adopted. The control schemes stored in programmable array logic (PAL) are implemented such that the line current is driven to follow the reference current. The reference current is derived from the a DC link voltage regulator and an output power estimator. The major advantage of using three-level PWM is that the blocking voltage of each AC power device is clamping to half of the DC link voltage. The high power factor and low harmonic currents at the input of the rectifier are verified by software simulations
Keywords :
AC-DC power convertors; PWM power convertors; electric current control; equivalent circuits; hysteresis; power factor correction; rectifying circuits; AC power switches; DC link voltage regulator; PAL storage; blocking voltage; control schemes; hysteresis current control; low harmonic currents; multilevel PWM; output power estimator; power factor corrector; power factor pre-regulator; power quality improvement; programmable array logic; reference current; single-phase bridge rectifier; single-phase pre-regulator; three-level pulse width modulation; Bridge circuits; Current control; Hysteresis; Power quality; Programmable logic arrays; Pulse width modulation; Reactive power; Rectifiers; Space vector pulse width modulation; Voltage;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780094
