Title :
A new soft switching technique for buck, boost and buck-boost converters
Author :
Zhang, Yingqi ; Sen, P.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
A new soft switching technique for buck, boost and buck-boost converters using a coupled inductor is proposed in this paper. The principles of operation of these converters are analyzed in detail. An additional winding is added on the same core of the main inductor for the purpose of commutation. By using hysteresis current control, zero voltage switching (ZVS) conditions are ensured over wide load range. The main inductor current is kept in continuous conduction mode (CCM) with small ripple, which allows high output power and small filter parameters. Also, the switching frequency is kept constant when load changes. Prototypes of buck, boost, and buck-boost converters have been built to verify the proposed concept. The experimental results are presented and they verify the analysis.
Keywords :
DC-DC power convertors; PWM power convertors; commutation; electric current control; inductors; magnetic cores; power control; switching circuits; windings; ZVS PWM converters; boost converters; buck converters; buck-boost converters; commutation; continuous conduction mode; coupled inductor; high output power; hysteresis current control; inductor core; operation principles; power regulation; small filter parameters; soft switching technique; switching frequency; winding; zero voltage switching; Bidirectional control; Current control; Filters; Inductors; Pulse width modulation converters; Switches; Switching circuits; Switching converters; Switching frequency; Zero voltage switching;
Conference_Titel :
Industry Applications Conference, 2002. 37th IAS Annual Meeting. Conference Record of the
Conference_Location :
Pittsburgh, PA, USA
Print_ISBN :
0-7803-7420-7
DOI :
10.1109/IAS.2002.1042773
