Induction heater coupling control by core saturation
US4843201A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1988 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | May 17, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An induction heater comprising an alternating-current-carrying conductor (1) extending along an axis; a plurality of core sections (3, 4, 5) arranged in line and each substantially encircling the axis to guide magnetic flux resulting from the alternating current in the conductor (1); a plurality of heating element sections respectively associated with the core sections and each comprising an electrically conductive closed loop encircling magnetic flux in the associated core section (3, 4, 5) and being heated by electrical current induced thereby; and means (13, 14) to at least partially saturate at least one (4, 5) of the core sections thereby to reduce the coupling between the conductor (1) and the heating element section associated with said one core section (4, 5) and thus control the heating effected by said one core section (4, 5) and its associated heating element section (FIG. 4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.