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US 2012/0057387 A1Published application
Hybrid switch for resonant power converters
AssigneeVirginia Tech Intellectual Properties, Inc.
InventorsJih-Sheng Lai, Wensong Yu
Life of this patent
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Abstract
A hybrid switch comprising two semiconductor switches connected in parallel but having different voltage drop characteristics as a function of current facilitates attainment of zero voltage switching and reduces conduction losses to complement reduction of switching losses achieved through zero voltage switching in power converters such as high-current inverters.
Claims20
A hybrid switch comprising
- an insulated gate bipolar transistor (IGBT), and
- a power MOSFET, wherein
- conduction terminals of said IGBT and Said power MOSFET are connected in parallel, and wherein
- control terminals of said IGBT and said power MOSFET are responsive to a control signal.
1 more element
A power converter including a hybrid switch comprising
- an insulated gate bipolar transistor (IGBT), and
- a power MOSFET, wherein
- conduction terminals of said IGBT and Said power MOSFET are connected in parallel, and wherein
- control terminals of said IGBT and said power MOSFET are responsive to a control signal.
1 more element
A method of reducing conduction losses in a high current switching circuit comprising
- controlling two switches to conduct concurrently, wherein one of said two switches exhibits a substantially resistive voltage drop as a function of current and another of said two switches exhibits a substantially constant voltage drop plus a small resistive voltage drop characteristic as a function of current, wherein conduction current is shared between said two switches in accordance with respective voltage drop characteristics of said two switches.
Dependencies are inferred from the claim text.