Microwave oven with transformer having resistive heating in series with the primary winding
US5742032A · kind A · utility
8Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1997 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Mar 3, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/6473
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A microwave oven has a food-receiving cavity and a magnetron for delivering microwave power to the cavity. The magnetron is supplied with a high voltage through a transformer, and a variable impedance is connected in series with the primary winding of the transformer. The resistive heating effect produced by primary current is utilized to heat the air in the oven cavity, and the magnitude of the impedance is variable to vary the output of the magnetron.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.