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US3568041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternator control device having simplified charge-discharge indicator
Assignee: Mitsubishi Electric Corp
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Filing: 1968-10-29
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Granted: 1971-03-02
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Expires: 1988-10-29
Abstract
Abstract In an alternator driven by a prime mover of a vehicle to charge a storage battery, a gate controlled rectifier is provided to excite the field winding of the alternator and means responsive to the output voltage of the alternator is provide to effect ONOFF control of the gate controlled rectifier. To provide initial separate excitation current from the battery, a second excitation circuit including a second gate controlled rectifier is provided which is rendered inoperative as the output voltage of the alternator builds up. A lamp is directly coupled to the second excitation circuit to indicate when separate excitation current is being supplied and that the battery is not being charged.
Inventors
- 👤 Kenjiro Arakane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:59
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/16; H02J7/163; H02J7/24; H02J7/2437; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/92; Y10; Y10S; Y10S320/00; Y10S320/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
242 words
A control device for a rotatably driven AC generator having an armature winding and a field coil, and which selectively charges a storage battery, comprising: a full wave rectifier circuit connected to the armature winding of said AC generator; a first exciting circuit including a gate controlled rectifier coupling the output of said armature winding to the field coil of said AC generator to selectively supply exciting current from the armature winding to the field coil; a second exciting circuit including a first switching element for selectively supplying exciting current from the storage battery to the field coil, said first switching element controlling the operation of said second exciting circuit; a second switching element connected to both said first and second exciting circuits for controlling both said gate controlled rectifier and said first switching element to thereby control said first and second exciting circuits, said second switching element turning off both said first and second exciting circuits when the output voltage of said full wave rectifier circuit reaches a predetermined value; and a pilot lamp directly coupled in said second exciting circuit and responsive to exciting current flowing in said second exciting circuit for indicating (1) when said storage battery is supplying exciting current and is not being charged by the output of said full wave rectifier circuit, and (2) when said storage battery is not supplying exciting current via said second exciting circuit and when said storage battery is being charged.
Claim 2
Dependent Claim
242 words
A control device for a rotatably driven AC generator having an armature winding and a field coil, and which selectively charges a storage battery, comprising: a full wave rectifier circuit connected to the armature winding of said AC generator; a first exciting circuit including a gate controlled rectifier coupling the output of said armature winding to the field coil of said AC generator to selectively supply exciting current from the armature winding to the field coil; a second exciting circuit including a first switching element for selectively supplying exciting current from the storage battery to the field coil, said first switching element controlling the operation of said second exciting circuit; a second switching element connected to both said first and second exciting circuits for controlling both said gate controlled rectifier and said first switching element to thereby control said first and second exciting circuits, said second switching element turning off both said first and second exciting circuits when the output voltage of said full wave rectifier circuit reaches a predetermined value; and a pilot lamp directly coupled in said second exciting circuit and responsive to exciting current flowing in said second exciting circuit for indicating (1) when said storage battery is supplying exciting current and is not being charged by the output of said full wave rectifier circuit, and (2) when said storage battery is not supplying exciting current via said second exciting circuit and when said storage battery is being charged.
Claim 3
Dependent Claim
58 words
A device according to claim 1, wherein said lamp is lit when said storage battery is supplying exciting current and is not being charged by the output of said full wave rectifier circuit, and is extinguished when said storage battery is not supplying exciting current via said second exciting circuit and when said storage battery is being charged.
Claim 4
Dependent Claim
29 words
A device according to claim 1, wherein said AC generator is a three phase AC generator, and wherein said full wave rectifier is a three phase full wave rectifier.
Claim 5
Dependent Claim
37 words
A device according to claim 2, wherein said first switching element includes a gate controlled rectifier having its gate electrode coupled to the second switching element, the second switching element selectively turning off the first switching element.
Claim 6
Dependent Claim
14 words
A device according to claim 1, wherein the second switching element comprises a transistor.
Claim 7
Dependent Claim
20 words
A device according to claim 5, wherein said transistor is coupled to the gate electrode of said gate controlled rectifier.
Claim 8
Dependent Claim
24 words
A device according to claim 4, wherein said second switching element includes a transistor coupled to the gate electrodes of said gate controlled rectifiers.
Claim 9
Dependent Claim
35 words
A device according to claim 4, wherein said second exciting circuit includes a resistance element coupled in series with said first switching element, said pilot lamp being directly coupled in parallel with said resistance element.
Claim 10
Dependent Claim
43 words
A device according to claim 4 including means coupling said first and second exciting circuits to said field coil so that exciting current supplied via said second exciting circuit is turned off as the exciting current supplied via said first exciting circuit increases.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |