Method and apparatus for extending zero-voltage swiitching range in a DC to DC converter
First Claim
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1. Apparatus for extending a zero voltage switching (ZVS) range during DC/DC power conversion, comprising:
- a DC/DC converter, operated in a quasi-resonant mode, comprising (i) a transformer, (ii) a primary switch, coupled to a primary winding of the transformer, for controlling current flow through the primary winding, and (iii) a varactor, coupled to the transformer, for accelerating a downswing in a voltage across the primary switch.
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Abstract
Apparatus for extending a zero voltage switching (ZVS) range during DC/DC power conversion. The apparatus comprises a DC/DC converter, operated in a quasi-resonant mode, comprising (i) a transformer, (ii) a primary switch, coupled to a primary winding of the transformer, for controlling current flow through the primary winding, and (iii) a varactor, coupled to the transformer, for accelerating a downswing in a voltage across the primary switch.
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Citations
20 Claims
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1. Apparatus for extending a zero voltage switching (ZVS) range during DC/DC power conversion, comprising:
a DC/DC converter, operated in a quasi-resonant mode, comprising (i) a transformer, (ii) a primary switch, coupled to a primary winding of the transformer, for controlling current flow through the primary winding, and (iii) a varactor, coupled to the transformer, for accelerating a downswing in a voltage across the primary switch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An inverter for extending a zero voltage switching (ZVS) range during DC/AC power conversion, comprising:
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a DC/DC converter for converting DC input power to DC output power, the DC/DC converter operated in a quasi-resonant mode and comprising (i) a transformer, (ii) a primary switch, coupled to a primary winding of the transformer, for controlling current flow through the primary winding, and (iii) a varactor, coupled to the transformer, for accelerating a downswing in a voltage across the primary switch; and a DC/AC conversion module for converting the DC output power to AC output power. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for extending a zero voltage switching (ZVS) range during DC/DC power conversion, comprising:
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deactivating a primary switch of a DC/DC converter operating in quasi-resonant mode, the primary switch for controlling current flow through a primary winding of the DC/DC converter; and increasing a resonant frequency of a resonant circuit of the DC/DC converter during a downswing in a voltage across the primary switch to accelerate the downswing. - View Dependent Claims (17, 18, 19, 20)
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Specification