High output power high frequency resonant load inverters
US6842355B2 · kind B2 · utility
3Cited by
6References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2001 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Nov 1, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A new control strategy for IGBTs when used in high frequency (75 kHz-500 kHz) high power (10 kW-5 MW) inverters with series resonant load, a topology commonly used for induction heating. The strategy changes the IGBT strain elements into a total stress picture that fits the IGBP's behaviour and internal nature better. This makes the IGBT operate much more efficient, thus increasing the maximum output power from the inverter significantly compared to a standard control scheme. This makes the IGBT based inverter a much cheaper alternative than a MOSFET inverter, which has been state of the art for this application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.