Title :
A new soft-switched quasi-single-stage (QSS) bi-directional inverter/charger
Author :
Wang, Kunrong ; Lee, Fred C. ; Dong, Wei
Author_Institution :
Celestica Corp., Johnson City, NY, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
A new soft-switched quasi single-stage (QSS) bidirectional inverter/charger topology is proposed in this paper. It realizes seamless four-quadrant operation in inverter mode, and rectifier operation with unity power factor in charger mode. Single stage power conversion, standard half-bridge connection of devices, soft-switching for all the power devices, low conduction loss, simple center-aligned PWM control, and high efficiency are among the salient features. The principles of circuit operation, PWM control and synthesis, and topological extension are discussed in this paper. The experimental results on a 3 kVA prototype (12 V DC to and from 110 V AC) are also presented
Keywords :
PWM invertors; battery chargers; bridge circuits; power factor; switching circuits; 110 V; 12 V; 3 kVA; bi-directional inverter/charger; center-aligned PWM control; half-bridge connection; high efficiency; inverter mode; low conduction loss; quasi-single-stage bi-directional inverter/charger; rectifier operation; seamless four-quadrant operation; single stage power conversion; soft-switched bi-directional inverter/charger; soft-switching; unity power factor; Batteries; Bidirectional control; Circuit topology; Hafnium; Pulse width modulation; Pulse width modulation inverters; Reactive power; Switches; Uninterruptible power systems; Voltage;
Conference_Titel :
Industry Applications Conference, 1999. Thirty-Fourth IAS Annual Meeting. Conference Record of the 1999 IEEE
Print_ISBN :
0-7803-5589-X
DOI :
10.1109/IAS.1999.806016
