Induction heating apparatus with means for detecting zero crossing point of high-frequency oscillation to determine triggering time
US4317975A · kind A · utility
16Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1978 |
| Grant date | Mar 2, 1982 |
| Priority date | — |
| Expiry date | Dec 26, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/27
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Induction heating apparatus using gate-controlled switching devices includes a zero crossing point detector for detecting the occurrence of each zero crossing point of high frequency energization current, and a timing circuit which provides timing action in response to the detected zero crossing point. The timing action is controlled by a power control circuit which detects the level of energy delivered to a load within a range from the inherent turn-off time of the gate-controlled switching devices to a desired value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.