Precharging apparatus and power converter
US9787210B2 · kind B2 · utility
3Cited by
58References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2015 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Jun 17, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/123
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Precharging systems and methods are presented for precharging a DC bus circuit in a power conversion system, in which precharging current is connected through a precharging resistance coupled between only a single AC input line and the DC bus circuit when the DC bus voltage is less than a non-zero threshold, and a controller individually activates controllable rectifier switching devices when the DC bus voltages greater than or equal to the threshold using DC gating or pulse width modulation to selectively provide a bypass path around the precharging resistance for normal load currents in the power conversion system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.