Patent US2265943A successfully refreshed from Google Patents.
US4816985A
Expired / Lapsed
US
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Apparatus for controlling an alternating current power supply
Assignee: Mitsubishi Electric Corp
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Filing: 1988-02-18
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Granted: 1989-03-28
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Expires: 2008-02-18
Abstract
Abstract An apparatus for controlling power conversion from alternating current (A.C.) to direct current (D.C.) by a converter has a D.C. voltage detector connected to receive a D.C. output of the converter for detecting the D.C. side voltage of the converter, a phase detector connected to an A.C. power source for detecting the phase of the A.C. power source, and calculating means for making a first calculation of a first current command value based on the output of the D.C. voltage detector, a second calculation of a phase angle of the A.C. power source voltage based on the first current command value, and a third calculation of second current command values based on the phase angle of the A.C. power source voltage and the output of the phase detector.
Inventors
- 👤 Tooru Tanahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:31
CPC Classifications
B; B66; B66B; B66B1/00; H; H02; H02M; H02M5/00; H02M5/40; H02M5/42; H02M5/44; H02M5/453; H02M5/458; H02M5/4585
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
176 words
An apparatus which controls the conversion of power from an alternating current (A.C.) power source to direct current (D.C.) by a converter with an A.C. input, a D.C. output, and a control input, the apparatus comprising: a D.C. voltage detector having an input connected to the D.C. output of the converter and having an output; a phase detector having an input connected to the A.C. power source and having an output; and calculating means connected to the output of the D.C. voltage detector and the output of the phase detector for making: a first calculation of a first current command value based on the output of the D.C. voltage detector, a second calculation of a phase angle of the A.C. power source voltage based on the first current command value, and a third calculation of second current command values based on the phase angle of the A.C. power source voltage and the output of the phase detector, the calculating means being connected to provide the second current command values to the control input of the converter.
Claim 2
Independent Claim
176 words
An apparatus which controls the conversion of power from an alternating current (A.C.) power source to direct current (D.C.) by a converter with an A.C. input, a D.C. output, and a control input, the apparatus comprising: a D.C. voltage detector having an input connected to the D.C. output of the converter and having an output; a phase detector having an input connected to the A.C. power source and having an output; and calculating means connected to the output of the D.C. voltage detector and the output of the phase detector for making: a first calculation of a first current command value based on the output of the D.C. voltage detector, a second calculation of a phase angle of the A.C. power source voltage based on the first current command value, and a third calculation of second current command values based on the phase angle of the A.C. power source voltage and the output of the phase detector, the calculating means being connected to provide the second current command values to the control input of the converter.
Claim 3
Dependent Claim
65 words
An apparatus as set forth in claim 1 further comprising an A.C. voltage detector having an input connected to the A.C. power source to detect A.C. voltage and having an output wherein the calculating means is also connected to the output of the A.C. voltage detector and the second calculation of the calculating means is additionally based on the output of the A.C. voltage detector.
References Cited (Backward Citations)
US3832620A
Cited
US4210956A
Cited
US4328454A
Cited
US4330815A
Cited
US4494179A
Cited
US4490780A
Cited
US4626978A
Cited
JPH0612568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |