Small load detection by comparison between input and output parameters of an induction heat cooking apparatus
US4356371A · kind A · utility
43Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1980 |
| Grant date | Oct 26, 1982 |
| Priority date | — |
| Expiry date | Nov 10, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2213/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An induction heat cooking apparatus includes an inverter which generates ultrasonic frequency energy for heating a magnetic load by induction, and a small load detection circuit. The detection circuit includes a comparator which compares the input and output parameters of the inverter and latches a bistable device when the input power is smaller than the output parameter. The bistable device shuts down the inverter to prevent inadvertently placed small utensil objects from being excessively heated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.