System and method for controlling a variable speed drive
US7425806B2 · kind B2 · utility
36Cited by
14References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2004 |
| Grant date | Sep 16, 2008 |
| Priority date | — |
| Expiry date | Jul 11, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable speed drive is provided having a converter to convert an AC voltage to a DC voltage, a DC link to filter and store energy from the converter, and a plurality of inverters. Each inverter is configured to convert a DC voltage to an AC voltage and is electrically connected in parallel to the DC link. An interleaved pulse width modulation control technique is used to control the operation of the plurality of inverters and possibly the converter to lower the RMS ripple current in the DC link.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.