Current control system for an induction heating apparatus
US4327268A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1980 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | May 30, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Coil current loading the induction coils of an induction heating apparatus is directly sensed at the input from the tank circuit and the derived feedback current signal is used to control the power supply to the tank circuit be reference to a signal provided manually or automatically under process control. A voltage feedback signal is derived with a transformer from the input to the tank circuit for providing an input to a voltage limiter operative on the current controller when the voltage to the tank circuit exceeds an acceptable limit. A current limiter overrides the current controller to limit the load current by control of the current controller when the load becomes excessive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.