Title :
Over current protection methods for LLC resonant converter
Author :
Yang, Bo ; Lee, Fred C. ; Concannon, Matthew
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
LLC resonant converter was getting more and more attention in recent years because of its high efficiency, high frequency operation capability and simple structure. In this paper, the over current protection issue of LLC resonant converter is discussed. Three methods to provide over current protection function for LLC converter are proposed and investigated. They are: increase switching frequency control, variable frequency+PWM control, and diode clamping method. The pros and cons for each method were discussed. Tests were performed to verify the discussion.
Keywords :
PWM power convertors; frequency control; overcurrent protection; power semiconductor diodes; resonant power convertors; switching convertors; LLC resonant converter; PWM control; diode clamping method; over current protection method; switching frequency control; variable frequency control; Bridge circuits; Magnetic resonance; Power system protection; Pulse width modulation; Pulse width modulation converters; Stress; Switching converters; Switching frequency; Thermal management; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2003. APEC '03. Eighteenth Annual IEEE
Conference_Location :
Miami Beach, FL, USA
Print_ISBN :
0-7803-7768-0
DOI :
10.1109/APEC.2003.1179276
