Pre-charging an inverter using an auxiliary winding
US8223515B2 · kind B2 · utility
38Cited by
44References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 2009 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Dec 7, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transformer module includes a main primary winding coupled to a first input power source to receive a medium voltage signal, multiple main secondary windings each to couple to a power cell of a drive system, and an auxiliary primary winding coupled to a second input power source to receive a low voltage signal. The auxiliary primary winding can be spatially separated from the main windings to increase leakage inductance. The auxiliary primary winding can be active during a pre-charge operation to pre-charge the power cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.