Patent US2786274A successfully refreshed from Google Patents.
Patent US4488211A successfully refreshed from Google Patents.
US4488211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Harmonic and pulsation reducing circuit used in a multiplex polyphase rectifier circuit
Assignee: Individual
•
Filing: 1982-08-17
•
Granted: 1984-12-11
•
Expires: 2002-08-17
Abstract
Abstract A harmonic and pulsation reducing circuit used in multiplex polyphase rectifier circuits such as a multiplex polyphase rectifier, a branch reactor, an external commutated invertor, etc. which is characterized in that a rectifier circuit to rectify the induced voltage of a secondary winding provided at interphase reactors interposed between other plural rectifier circuits is connected between the center of the interphase reactors and loads or a DC power source so that the rectified voltage may be superposed on the DC output voltage of the said plural rectifier circuits or the other DC power source.
Inventors
- 👤 Shota Miyairi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:51
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/40; H02M5/42; H02M5/44; H02M5/443; H02M5/45; H02M5/4505
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
In a multiplex polyphase rectifier circuit including an interphase reactor and a plurality of rectifier circuits, a harmonic and pulsation reducing circuit comprising a secondary winding associated with said interphase reactor, and an additional rectifier circuit rectifying the voltage induced in said secondary winding, said harmonic and pulsation reducing circuit being connected between a central point of said interphase reactor and a load in such a relation that said secondary winding is connected in series with said load, whereby the voltage obtained as a result of rectification of said induced voltage is superposed on the DC output voltage of said multiplex polyphase rectifier circuit.
Claim 2
Dependent Claim
104 words
In a multiplex polyphase rectifier circuit including an interphase reactor and a plurality of rectifier circuits, a harmonic and pulsation reducing circuit comprising a secondary winding associated with said interphase reactor, and an additional rectifier circuit rectifying the voltage induced in said secondary winding, said harmonic and pulsation reducing circuit being connected between a central point of said interphase reactor and a load in such a relation that said secondary winding is connected in series with said load, whereby the voltage obtained as a result of rectification of said induced voltage is superposed on the DC output voltage of said multiplex polyphase rectifier circuit.
Claim 3
Dependent Claim
37 words
A harmonic and pulsation reducing circuit as claimed in claim 1, wherein said plurality of rectifier circuits are constituted by thyristors, and said additional rectifier circuit is in the form of a hybrid bridge full-wave rectifier circuit.
Claim 4
Dependent Claim
110 words
In an external commutated inverter including an interphase reactor and a plurality of rectifier circuits constituted by thyristors, a harmonic and pulsation reducing circuit comprising a secondary winding associated with the said interphase reactor, and an additional rectifier circuit rectifying the voltage induced in said secondary winding, said harmonic and pulsation reducing circuit being connected between a central point of said interphase reactor and a DC power source in such a relation that said secondary winding is connected in series with said DC power source, whereby the voltage obtained as a result of rectification of said induced voltage is superposed on the DC output voltage of said DC power source.
Claim 5
Dependent Claim
110 words
In an external commutated inverter including an interphase reactor and a plurality of rectifier circuits constituted by thyristors, a harmonic and pulsation reducing circuit comprising a secondary winding associated with the said interphase reactor, and an additional rectifier circuit rectifying the voltage induced in said secondary winding, said harmonic and pulsation reducing circuit being connected between a central point of said interphase reactor and a DC power source in such a relation that said secondary winding is connected in series with said DC power source, whereby the voltage obtained as a result of rectification of said induced voltage is superposed on the DC output voltage of said DC power source.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |