High frequency heating apparatus
US5274208A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Mar 25, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2206/043
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high frequency heating apparatus includes a frequency conversion section including a switching element and converting a commercial power supply frequency to high frequency waves by an on-off control of the switching element, a step-up transformer stepping up an alternating output from the frequency conversion section, a rectification circuit connected at a secondary side of the step-up transformer, a magnetron driven by a direct current power from the rectification circuit, an anode current detection circuit detecting an anode current of the magnetron, and a control circuit for controlling an "on" period of the switching element in response to a detection signal from the anode current detection circuit so that the anode current is maintained at a predetermined value, thereby stabilizing a high frequency power produced by the magnetron against different commercial power supplies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.