Power adjustment with variable frequency and duty-cycle control for induction heating apparatus
US4147910A · kind A · utility
10Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1977 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Jun 6, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/455
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In an induction heating cooking apparatus, the frequency of electromagnetic energy is varied in response to a desired power setting level within an allowable range and the duty cycle of the energy is varied in response to the setting level while the frequency is set at the lower limit of the allowable range. The combined effects of frequency and duty cycle controls permit the power to vary from as low as 50 watts to as high as 2 kilowatts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.