US4674025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-inverter control apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1986-06-05
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Granted: 1987-06-16
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Expires: 2006-06-05
Abstract
Abstract In a multi-inverter system, inverters in series are swapped around in order to eliminate regenerative power due to phase difference between consecutive inverters in series.
Inventors
- 👤 Charles W. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:16
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/483; H02M7/49; H02M7/505; H02M7/515; H02M7/521
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
In a multi-inverter system including at least two inverters connected in series for outputting a compound voltage, the combination of: means for controlling said inverters to establish a predetermined phase shift between the respective output voltages of said inverters; and means responsive to a recurrent triggering signal for exchanging said inverters under said controlling means, whereby the average power derived from each inverter as a function of time is balanced out.
Claim 2
Dependent Claim
71 words
In a multi-inverter system including at least two inverters connected in series for outputting a compound voltage, the combination of: means for controlling said inverters to establish a predetermined phase shift between the respective output voltages of said inverters; and means responsive to a recurrent triggering signal for exchanging said inverters under said controlling means, whereby the average power derived from each inverter as a function of time is balanced out.
Claim 3
Dependent Claim
24 words
The system of claim 1 with said triggering signal responsive means being effective to exchange the effect of said controlling means upon said inverter.
Claim 4
Dependent Claim
11 words
The system of claim 2 with said triggering signal being periodical.
Claim 5
Dependent Claim
12 words
The system of claim 3 with said triggering signal being asynchronously applied.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-15 | 1990-12-15 | 1991-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-15 | 1994-12-15 | 1995-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-15 | 1998-12-15 | 1999-06-16 | $7700.00 | Window Closed / Lapsed |