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Soft‐switching Techniques for
Soft‐switching Techniques for
PWM Full‐bridge Converter
PWM Full‐bridge Converter
Aero‐Power Sci‐tech Center
Nanjing University of Aeronautics Astronautics
Background
For PWM full‐bridge converter,
numerous topologies and control
strategy have been proposed, such
as bipolar control, limited bipolar
control and phase‐shifted control.
The relations between proposed
converters and the laws for
control strategies should be
considered.
Any other topologies and control
strategies?
Background
Propose a family of control strategies for PWM full‐bridge
converter, including the ones that are unknown
Classify the available control strategies, and the ones can realize
soft‐switching will be considered
Classify the soft‐switching techniques for PWM full‐bridge
converters
Propose the corresponding control schemes and topologies for
soft‐switching realization
Background for soft‐switching
intrinsic parameters in converters
Background for soft‐switching
Soft‐switching:
■ By using the resonant elements including inductor and
capacitor, turn‐on or turn‐off switches when the voltage or
current decreases to zero naturally
time name applications
time name applications
Half‐bridge or full‐bridge
1970s Series or parallel resonant technique
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