This paper presents novel resonant techniques in controlling the output power of a half-bridge series-parallel load-resonant and a quasi-resonant converter operating at true resonance using simple power electronics techniques. A mathematical model of the load-resonant converter has been designed, analyzed and developed, leading to the building of a practical circuit with multi-resonant frequencies. Operation of the circuit over the entire resonant frequency range maintains essentially zero-current switching, and unity-power factor while operating at high-frequency operation. Different power levels can be delivered to the load at each distinct resonant frequency. Different curves have been drawn to assist the process. The quasi-resonant converter has been constructed using a pair of back-to-back power switches switching around 100kHz. The resonant components consist of only an inductor and a capacitor. Another pair of switches is inserted in the circuit to avoid slip-frequency problems when the load is an induction motor and variable speed operation is desired.
Power Control of Converters using Novel Resonant Techniques with Applications
Sae Technical Papers
34th Intersociety Energy Conversion Engineering Conference ; 1999
1999-08-02
Aufsatz (Konferenz)
Englisch
A novel fractional proportional-resonant current controller for voltage source converters
BASE | 2016
|