Title :
A voltage-mode controlled high-input-power-factor AC line conditioner with minimized output voltage harmonics
Author :
Lo, Yu-Kang ; Chen, Chern-Lin
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A new AC line conditioner is presented. This system consists of a high input power factor half-bridge switch-mode rectifier (SMR), DC link capacitors and a low output harmonic half-bridge inverter. The rectifier is operated under voltage-mode feedback. No current sensing is required. The inverter is controlled by an EPROM-based modulator. Optimized sinusoidal PWM patterns compensating DC link voltage ripple and dead time effects are programmed. Synchronizing the SMR and the inverter can eliminate the voltage imbalance between DC link capacitors. The presented system is feasible for single- and three-phase applications
Keywords :
EPROM; bridge circuits; digital control; invertors; power capacitors; power convertors; power engineering computing; power factor; power system harmonics; pulse width modulation; rectifiers; rectifying circuits; switching circuits; voltage control; AC line conditioner; DC link capacitors; DC link voltage ripple compensation; EPROM; dead time compensation; half-bridge inverter; half-bridge switch-mode rectifier; output voltage harmonics; power factor; single-phase; sinusoidal PWM patterns; synchronisation; three-phase; voltage imbalance; voltage-mode feedback; Capacitors; Circuits; Costs; Current control; Diodes; Feedback; Power harmonic filters; Power system harmonics; Pulse width modulation; Pulse width modulation inverters; Reactive power; Rectifiers; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, PESC '94 Record., 25th Annual IEEE
Conference_Location :
Taipei
Print_ISBN :
0-7803-1859-5
DOI :
10.1109/PESC.1994.349707
