Title :
Efficiency design considerations for a wide-range operated high-power soft-switching inverter
Author :
Lai, Jih-Sheng ; Zhang, Junhong
Author_Institution :
Future Energy Electron. Center, Virginia Polytech. Inst. & State Univ., Blacksburg, VA
Abstract :
Most soft-switching inverters have been designed to eliminate the switching loss, but the traditional techniques are only effective for certain operating points. This paper explores the negative current cycle effect on zero-voltage switching type inverters and then proposes a simple timing control technique for adaptivity of operating in a wide range of source voltage and load current conditions. A three-phase coupled-magnetic type 120-kW inverter has been designed and implemented for motor drive applications. The circuit operating principle is described in detail and then verified with computer simulation. Hardware experimental results indicate a superior efficiency performance profile under different voltages and load currents
Keywords :
digital simulation; invertors; losses; switching convertors; zero voltage switching; 120 kW; computer simulation; high-power soft-switching inverter; motor drive application; negative current cycle effect; switching loss; three-phase coupled-magnetic type inverter; timing control technique; zero-voltage switching; Application software; Computer simulation; Coupling circuits; Hardware; Inverters; Motor drives; Switching loss; Timing; Voltage control; Zero voltage switching;
Conference_Titel :
Industrial Electronics Society, 2005. IECON 2005. 31st Annual Conference of IEEE
Conference_Location :
Raleigh, NC
Print_ISBN :
0-7803-9252-3
DOI :
10.1109/IECON.2005.1568973
