Constant frequency resonant dc/dc converter
First Claim
1. A constant frequency full resonant mode dc/dc converter operating at a constant resonant operating frequency comprising;
- a full bridge inverter having a least four semiconductor switches to which control signal are applied and at least four snubber capacitors;
a resonant circuit means connected to the full bridge inverter and comprising a parallel resonant branch which has a parallel inductor and parallel capacitor and is tuned to said operating frequency, and a series resonant branch having a series inductor which, together with said parallel capacitor, is tuned to a frequency different from said operating frequency;
a transformer connected to said resonant circuit means in such a way that said series resonant branch is connected in series to said transformer and said parallel resonant branch is connected in parallel to said transformer; and
a rectifying circuit means connected to said transformer wherein the phase shift angle among said control signals is adjustable to maintain the output voltage of said converter constant.
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Accused Products
Abstract
A constant frequency full resonant mode dc/dc converter is provided, suitable for use in low voltage, high current dc power distribution systems. The converter comprises a full-bridge inverter, a resonant circuit, an output transformer, an output diode rectifier, a dc output filter, and a control circuit. The resonant circuit consists of a series branch and a parallel branch. The components of the resonant circuit are selected such that a sinusoidal voltage waveform is achieved across the parallel branch, and an overall lagging current is obtained at the output of the full-bridge inverter for a desired range of output voltage control and no-load to full-load operating conditions.
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Citations
4 Claims
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1. A constant frequency full resonant mode dc/dc converter operating at a constant resonant operating frequency comprising;
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a full bridge inverter having a least four semiconductor switches to which control signal are applied and at least four snubber capacitors; a resonant circuit means connected to the full bridge inverter and comprising a parallel resonant branch which has a parallel inductor and parallel capacitor and is tuned to said operating frequency, and a series resonant branch having a series inductor which, together with said parallel capacitor, is tuned to a frequency different from said operating frequency; a transformer connected to said resonant circuit means in such a way that said series resonant branch is connected in series to said transformer and said parallel resonant branch is connected in parallel to said transformer; and a rectifying circuit means connected to said transformer wherein the phase shift angle among said control signals is adjustable to maintain the output voltage of said converter constant. - View Dependent Claims (2, 3, 4)
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Specification