Induction heating method implemented in a device including magnetically coupled inductors
US9398643B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 19, 2010 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Jun 3, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is an induction heating method implemented in a device for heating a metal part, the device including magnetically coupled inductors. Oscillating circuits of the device have at least approximately the same resonance frequency, each inverter is controlled by a control unit to vary amplitude and phase of current passing through the corresponding inductor, the device also including a means for determining said current and an actual temperature profile of said part. The method includes: a) comparing said actual temperature profile with a reference temperature profile and calculating a reference power density profile; b) calculating target currents which the inverters must produce in order for the currents of the inductors to reach suitable target values; c) determining the currents passing through the inductors to compare said currents with said target values and determine correction current deviations, and sending correction instructions to said control units in accordance with said current deviations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.