Power Conversion Device
The power conversion device addresses inefficiencies in conventional DC/DC converters by determining reactor current continuity and calculating synchronous rectification timing, achieving precise rectification without external diodes and high-performance CPUs, resulting in a compact, efficient, and cost-effective solution.
JP7757805B2Active Publication Date: 2025-10-22OMRON CORP
Patent Information
- Application Number
- JP2022005938
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-01-18
- Publication Date
- 2025-10-22
- Estimated Expiration
- 2042-01-18
Smart Images
Figure 0007757805000001 
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Figure 0007757805000003
Abstract
To provide a small, low-cost, accurate, and high-efficiency power conversion device that can conduct synchronous rectification.SOLUTION: A power conversion device includes an input terminal pair, an output terminal pair, a first capacitor, a first switching part, a second switching part, a reactor, a transformer, a second capacitor, and a control unit. The control unit includes: a continuity determination unit that determines whether a reactor current is continuous or discontinuous; a synchronous rectification timing computing unit that calculates a synchronous rectification control timing of a second switching control signal for controlling switching of the second switching part in order to rectify an AC current being supplied from the first switching part to the second switching part via the reactor and the transformer depending on whether it is continuous or discontinuous, under control of the second switching part in synchronization with control of the first switching part; and a control signal output unit that generates and outputs a first switching control signal and the second switching control signal on the basis of the synchronous rectification control timing.SELECTED DRAWING: Figure 2
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Citation Information
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