Title :
A novel active resonant snubber for single switch unity power factor three-phase diode rectifiers
Author :
Shukla, Jagiitpati ; Fernandes, B.G.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Bombay, India
Abstract :
A new active feed-forward snubber for conventional three-phase PWM (pulse width modulated) boost rectifier using single switch operated in discontinuous conduction input current mode (DCM) is proposed. It is a resonant circuit consisting of a switch and passive components and it ensures that the main boost switch will be switched under zero-voltage (ZV) condition. Also, the boost diode operates under soft switching condition. Since the snubber circuit is a resonant circuit, the auxiliary switch itself has a soft turn-on and turn-off, resulting in reduced switching losses and electromagnetic interference (EMI). Performance of the converter circuit is predicted by simulating it on SABER. A laboratory prototype delivering 1 kW power at 245 Volts from 86.6 Vrms (L-L) is designed and developed. The simulation results obtained are verified experimentally.
Keywords :
PWM power convertors; electromagnetic interference; feedforward; power engineering computing; power factor; rectifying circuits; resonant power convertors; snubbers; switching convertors; 1 kW; 245 V; 86.6 V; EMI; PWM; SABER; active resonant snubber; boost diodes; boost rectifiers; boost switch; diode rectifiers; discontinuous conduction; electromagnetic interference; feed-forward snubber; passive components; pulse width modulation; resonant circuit; soft switching condition; switch components; switching losses reduction; unity power factor; zero-voltage condition; Diodes; Electromagnetic interference; Pulse width modulation; RLC circuits; Reactive power; Rectifiers; Resonance; Snubbers; Switches; Switching circuits;
Conference_Titel :
Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual
Print_ISBN :
0-7803-8399-0
DOI :
10.1109/PESC.2004.1355150
