Inductive heating apparatus
US4338503A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Jul 30, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Inductive heating apparatus includes serially connected first and second transistors which are alternately caused to conduct by a control circuit. A resonant circuit including an induction heating coil and a capacitor is connected in parallel with the second transistor. When the first transistor conducts a first current flows to charge the capacitor and when the second transistor conducts a second current flows in the resonant circuit to discharge the capacitor. The control circuit produces a turn-off signal to the conducting transistor before the current through the conducting current falls to zero and also produces a turn on signal to the nonconducting transistor when the current through the conducting transistor reaches zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.