US3754174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exciting method of electric machine combining electromagnetic coupling with electric rotating machine
Assignee: Kawasaki Heavy Industries Ltd
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Filing: 1972-08-04
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Granted: 1973-08-21
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Expires: 1992-08-04
Abstract
Abstract An electromagnetic coupling is connected mechanically with an electric machine whose armature winding is connected electrically with that of the electromagnetic coupling, and one of the two rotors of the electromagnetic coupling drives a load and the other rotor is driven by a driving machine. There is provided a transformer whose primary winding is supplied with electric power from the armature winding of the electromagnetic coupling and from which an exciting current is supplied to the field winding of the electromagnetic coupling or of the electric machine. By this arrangement, the whole installation will be compact and the stability will be high.
Inventors
- 👤 F Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:00
CPC Classifications
H; H02; H02K; H02K51/00; H02P; H02P29/00; H02P29/0016; H02P29/0027
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
202 words
Electric machine arrangement comprising in combination: an electric rotating machine having a stator, a rotor, a field winding and an armature winding in which alternating current flows; an electromagnetic coupling having two rotors which rotate with respect to each other, one of which is provided with an armature winding, and the other of which is provided with a field winding; one of the said two rotors of the said electromagnetic coupling being mechanically combined with the said rotor of the said electric rotating machine; the said armature winding of the said electromagnetic coupling and the said armature winding of the said electric rotating machine being electrically connected with each other; a transformer having at least one primary winding and a secondary winding; a converter which is composed of rectifiers; at least one of the said field windings and the secondary winding of the said transformer being connected electrically through the said converter; one of the said armature windings being connected electrically with the said primary winding of the transformer; wherein one of the said rotors of the electromagnetic coupling being arranged to drive a load, and the other rotor of the electromagnetic coupling being arranged to be driven by a driving machine.
Claim 2
Dependent Claim
202 words
Electric machine arrangement comprising in combination: an electric rotating machine having a stator, a rotor, a field winding and an armature winding in which alternating current flows; an electromagnetic coupling having two rotors which rotate with respect to each other, one of which is provided with an armature winding, and the other of which is provided with a field winding; one of the said two rotors of the said electromagnetic coupling being mechanically combined with the said rotor of the said electric rotating machine; the said armature winding of the said electromagnetic coupling and the said armature winding of the said electric rotating machine being electrically connected with each other; a transformer having at least one primary winding and a secondary winding; a converter which is composed of rectifiers; at least one of the said field windings and the secondary winding of the said transformer being connected electrically through the said converter; one of the said armature windings being connected electrically with the said primary winding of the transformer; wherein one of the said rotors of the electromagnetic coupling being arranged to drive a load, and the other rotor of the electromagnetic coupling being arranged to be driven by a driving machine.
Claim 3
Dependent Claim
128 words
Electric machine arrangement as claimed in claim 1, wherein one of the two rotors of the electromagnetic coupling is mechanically combined with the rotor of the electric rotating machine in such a manner that a rotor of which a circumferential inner part of a cylinder is provided with a magnetic member forming a magnetic circuit for the electromagnetic coupling and of which a circumferential outer part of the cylinder is provided with a magnetic member forming a magnetic circuit for the electric rotating machine is used in common as one of the two rotors of the electromagnetic coupling and as the rotor of the electric rotating machine, and rotates in a space between the stator of the electric rotating machine and the other rotor of the electromagnetic coupling.
Claim 4
Dependent Claim
43 words
Electric machine arrangement as claimed in claim 1, wherein the driving machine is a prime mover for propulsion of a ship suCh as an internal combustion engine, a steam turbine and a gas turbine, and the load is a propeller of the ship.
Claim 5
Dependent Claim
42 words
Electric machine arrangement as claimed in claim 1, wherein the rotor of the electromagnetic coupling combined mechanically with the rotor of the electric rotating machine drives the load, and the other rotor of the electromagnetic coupling is driven by the driving machine.
Claim 6
Dependent Claim
48 words
Electric machine arrangement as claimed in claim 4, wherein the field winding of the electric rotating machine is connected electrically with the secondary winding of the transformer through the converter, and the armature winding of the electromagnetic coupling is connected electrically with the primary winding of the transformer.
Claim 7
Dependent Claim
42 words
Electric machine arrangement as claimed in claim 1, wherein the rotor of the electromagnetic coupling combined mechanically with the rotor of the electric rotating machine is driven by the driving machine and the other rotor of the electromagnetic coupling drives the load.
Claim 8
Dependent Claim
52 words
Electric machine arrangement as claimed in claim 1, wherein the rotor of the electromagnetic coupling combined mechanically with the rotor of the electric rotating machine is driven by the driving machine and drives a propeller of a ship, and the other rotor of the electromagnetic coupling drives another propeller of the ship.
Claim 9
Dependent Claim
48 words
Electric machine arrangement as claimed in claim 6, wherein the field winding of the electromagnetic coupling is connected electrically with the secondary winding of the transformer through the converter, and the armature winding of the electric rotating machine is connected electrically with the primary winding of the transformer.
Claim 10
Dependent Claim
49 words
Electric machine arrangement as claimed in claim 7, wherein the field winding of the electric rotating machine is connected electrically with the secondary winding of the transformer through the converter, and the armature winding of the electric rotating machine is connected electrically with the primary winding of the transformer.
Claim 11
Dependent Claim
31 words
Electric machine arrangement as claimed in claim 1, wherein the primary winding of the transformer is a voltage winding which is electrically connected with the armature winding of the electromagnetic coupling.
Claim 12
Dependent Claim
40 words
Electric machine arrangement as claimed in claim 1, wherein the primary winding of the transformer is a current winding which is electrically connected between the armature winding of the electromagnetic coupling and the armature winding of the electric rotating machine.
Claim 13
Dependent Claim
42 words
Electric machine arrangement as claimed in claim 1, wherein the primary winding of the transformer is a voltage winding which is electrically connected with an electric source other than the armature windings of the electromagnetic coupling and of the electric rotating machine.
Claim 14
Dependent Claim
62 words
Electric machine arrangement as claimed in claim 1, wherein the transformer has two kinds of primary windings one of which is a voltage winding connected electrically with the armature winding of the electromagnetic coupling and the other of which is a current winding connected electrically between the armature winding of the electromagnetic coupling and the armature winding of the electric rotating machine.
Claim 15
Dependent Claim
73 words
Electric machine arrangement as claimed in claim 1, wherein the transformer has two kinds of primary windings one of which is a voltage winding connected electrically with an electric source other than the armature windings of the electromagnetic coupling and of the electric rotating machine and the other of which is a current winding connected electrically between the armature winding of the electromagnetic coupling and the armature winding of the electric rotating machine.
Claim 16
Dependent Claim
77 words
Electric machine arrangement as claimed in claim 1, wherein there is provided a second converter which is composed of rectifiers and whose D.C. terminals are connected electrically in series with the D.C. terminals of the converter described in claim 1 to the one of the field windings; further, the A.C. terminals of the seCond converter are connected electrically with an electric source other than the armature windings of the electromagnetic coupling and of the electric rotating machine.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |