US6856038B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed wind turbine having a matrix converter
Assignee: Vestas Wind Systems AS
•
Filing: 2003-03-24
•
Granted: 2005-02-15
•
Expires: 2023-03-24
Abstract
Abstract A variable speed wind turbine is disclosed comprising a turbine rotor that drives a doubly-fed induction generator, a matrix converter which converts variable frequency output into constant frequency output, and a control unit and a protection circuit for the matrix converter. Power is circulated in the system allowing for sensorless detection of rotor position and better output ratios of power from the system.
Inventors
- 👤 Anders V. Rebsdorf
- 👤 Lars Helle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
F; F03; F03D; F03D7/00; F03D7/02; F03D7/028; F03D7/0284; F03D9/00; F03D9/20; F03D9/25; F03D9/255; H; H02; H02M; H02M1/00; H02M1/42; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/275; H02M5/297; H02P; H02P9/00; H02P9/007; H02P9/42; F05; F05B; F05B2270/00; F05B2270/10; F05B2270/1016; H02P2101/00; H02P2101/15; Y; Y02; Y02B; Y02B70/00; Y02B70/10; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y02E10/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A method for operating a variable speed wind turbine comprising: configuring a generator for connection to a utility grid; connecting a matrix converter with a plurality of switches connected to the generator; supplying power from generator to the utility grid using the matrix converter; and actively damping drive-train oscillations.
Claim 2
Independent Claim
49 words
A method for operating a variable speed wind turbine comprising: configuring a generator for connection to a utility grid; connecting a matrix converter with a plurality of switches connected to the generator; supplying power from generator to the utility grid using the matrix converter; and actively damping drive-train oscillations.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2008-02-15 | 2008-08-16 | 2009-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-02-15 | 2012-08-16 | 2013-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-02-15 | 2016-08-16 | 2017-02-15 | $7700.00 | Window Closed / Lapsed |