Title :
Novel unity power factor circuits using zero-vector control for single-phase input system
Author :
Itoh, Jun-Ichi ; Fujita, Kouetsu
Author_Institution :
Power Electron. Dev. Lab., Fuji Electr. Corp. Res. & Dev. Ltd., Tokyo, Japan
Abstract :
This paper proposes two novel circuits which realize a unity input power factor single-phase to three-phase power converter with a motor load. The power supply is connected to the neutral point of the motor, and the three-phase inverter is controlled to act also as a virtual AC/DC converter leg. This virtual leg is controlled by zero-vectors of the three-phase inverter. The main features of these circuits are: (i) no inductive components are required; and (ii) a reduction in number of switching devices compared with conventional topologies. A full-bridge power converter can be built using the same number of switching devices as the conventional half-bridge, and with no need for a capacitive leg with accessible neutral point. In this paper, the full-bridge type of the proposed circuit is experimentally tested using a 750 W induction motor as load
Keywords :
AC-AC power convertors; induction motors; load (electric); power factor correction; 750 W; AC/AC power conversion; induction motor load; power supply; single-phase input system; switching devices minimisation; three-phase inverter; unity power factor circuits; virtual AC/DC converter leg; zero-vector control; AC motors; Circuit testing; Circuit topology; DC motors; DC-DC power converters; Inverters; Leg; Power supplies; Reactive power; Switching circuits;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-5160-6
DOI :
10.1109/APEC.1999.750497