Induction heating device having improved detection accuracy with respect to material of object
US11690142B2 · kind B2 · utility
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1References
20Claims
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Assignee
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Key dates
| Filing date | Jul 21, 2020 |
| Grant date | Jun 27, 2023 |
| Priority date | — |
| Expiry date | Dec 10, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2213/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An induction heating device includes: a working coil, an inverter, a current transformer, a current detecting circuit, a voltage detecting circuit, an AND circuit, and a controller. The induction heating device may detect presence or absence of an object and a material of the object based on a magnitude of resonance current applied to the working coil and a phase difference between the resonance current and a voltage applied to a switching element of the inverter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.