US6121699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
AC generator for motor vehicles
Assignee: Mitsubishi Electric Corp
•
Filing: 1998-11-18
•
Granted: 2000-09-19
•
Expires: 2018-11-18
Abstract
Abstract A motor vehicle AC generator including a rectifier in which a direct-fitting surface of a negative-polarity side cooling plate is brought closely into contact with a casing direct-fitting surface of a rear bracket and is fixedly tightened with a fitting screw with respect thereto. In addition, a silicone sheet is interposed between the cooling plate and the rear bracket in a state of being located within an intervening member accommodating groove made in the direct-fitting surface of the cooling plate so as to cover an area lying light under a diode except the peripheral bearing surface of the fitting screw. This construction forms an electric conducting portion at which the direct-fitting portion of the cooling plate and the casing direct-fitting surface directly come into contact with each other and further forms a thermal conducting portion at which the direct-fitting surface of the cooling plate and the casing direct-fitting surface come into contact with each other in a state where the silicone sheet is interposed therebetween.
Inventors
- 👤 Toshiaki Kashihara
- 👤 Yoshihito Asao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:05
CPC Classifications
H; H10; H10W; H10W90/00; H02; H02K; H02K11/00; H02K11/04; H02K11/049; H02K11/05; H10W40/00; H10W40/60; H10W40/611
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
318 words
An AC generator for a motor vehicle, the AC generator comprising: a rotor fitted over a shaft rotatably supported within a casing; a stator attached to said casing to surround said rotor; and a rectifier having a positive-polarity side cooling plate, positive-polarity side one-way conducting devices mounted on a fitting surface of said positive-polarity side cooling plate, a negative-polarity side cooling plate and negative-polarity side one-way conducting devices mounted on a fitting surface of said negative-polarity side cooling plate, said rectifier being fixedly tightened with a fitting screw to said casing in a state where a direct-fitting surface of only one of either said positive-polarity side and said negative-polarity side cooling plates opposite to said fitting surface thereof is brought closely into contact with a casing direct-fitting surface formed on an inner wall surface of said casing and the other of said positive-polarity side and said negative-polarity side cooling plates is not brought closely into contact with said casing direct-fitting surface; wherein an intervening member providing thermal conductivity is interposed between said direct-fitting surface of said only one of either said positive-polarity side cooling plate and said negative-polarity side cooling plate and said casing direct-fitting surface to cover at least an area right under said one-way conducting devices mounted on said fitting surface of said only one of either said positive-polarity side cooling plate and said negative-polarity side cooling plate to constitute an electric conducting portion at which said direct-fitting surface of said only one of either said positive-polarity side cooling plate and said negative-polarity side cooling plate and said casing direct-fitting surface come directly into contact with each other and a thermal conducting portion at which said direct-fitting surface of said only one of either said positive-polarity side cooling plate and said negative-polarity side cooling plate and said casing direct-fitting surface come into contact with each other in a state where said intervening member is interposed therebetween.
Claim 2
Dependent Claim
318 words
An AC generator for a motor vehicle, the AC generator comprising: a rotor fitted over a shaft rotatably supported within a casing; a stator attached to said casing to surround said rotor; and a rectifier having a positive-polarity side cooling plate, positive-polarity side one-way conducting devices mounted on a fitting surface of said positive-polarity side cooling plate, a negative-polarity side cooling plate and negative-polarity side one-way conducting devices mounted on a fitting surface of said negative-polarity side cooling plate, said rectifier being fixedly tightened with a fitting screw to said casing in a state where a direct-fitting surface of only one of either said positive-polarity side and said negative-polarity side cooling plates opposite to said fitting surface thereof is brought closely into contact with a casing direct-fitting surface formed on an inner wall surface of said casing and the other of said positive-polarity side and said negative-polarity side cooling plates is not brought closely into contact with said casing direct-fitting surface; wherein an intervening member providing thermal conductivity is interposed between said direct-fitting surface of said only one of either said positive-polarity side cooling plate and said negative-polarity side cooling plate and said casing direct-fitting surface to cover at least an area right under said one-way conducting devices mounted on said fitting surface of said only one of either said positive-polarity side cooling plate and said negative-polarity side cooling plate to constitute an electric conducting portion at which said direct-fitting surface of said only one of either said positive-polarity side cooling plate and said negative-polarity side cooling plate and said casing direct-fitting surface come directly into contact with each other and a thermal conducting portion at which said direct-fitting surface of said only one of either said positive-polarity side cooling plate and said negative-polarity side cooling plate and said casing direct-fitting surface come into contact with each other in a state where said intervening member is interposed therebetween.
Claim 3
Dependent Claim
53 words
An AC generator for a motor vehicle as defined in claim 1, wherein said intervening member is interposed between said direct-fitting surface of said one of said positive-polarity side cooling plate and said negative-polarity side cooling plate and said casing direct-fitting surface so that said thermal conducting portion surrounds said electric conducting portion.
Claim 4
Dependent Claim
53 words
An AC generator for a motor vehicle as defined in claim 1, further comprising an intervening member accommodating groove for accommodating said intervening member provided in at least one of said direct-fitting surface of said one of said positive-polarity side cooling plate and said negative-polarity side cooling plate and said casing direct-fitting surface.
Claim 5
Dependent Claim
64 words
An AC generator for a motor vehicle as defined in claim 3, further comprising an intervening member clearance groove made in at least one of said direct-fitting surface of said one of said positive-polarity side cooling plate and said negative-polarity side cooling plate and said casing direct-fitting surface so as to constitute a boundary between said thermal conducting portion and said electric conducting portion.
Claim 6
Dependent Claim
22 words
An AC generator for a motor vehicle as defined in claim 1, wherein said intervening member is made from a sheet-like material.
Claim 7
Dependent Claim
23 words
An AC generator for a motor vehicle as defined in claim 1, wherein said intervening member is made out of a grease-like material.
Claim 8
Dependent Claim
25 words
An AC generator as claimed in claim 1, wherein said thermally conductive silicone intervening member has a thermal conductivity of at least 2.5 kcal/mh °C.
Claim 9
Dependent Claim
279 words
An AC generator comprising; a rotor fitted over a shaft rotatably supported within a casing; a stator attached to said casing to surround said rotor; and a rectifier having a positive-polarity side cooling plate with a plurality of positive-polarity side one-way conducting devices mounted on a fitting surface of said positive-polarity side cooling plate, a negative-polarity side cooling plate with negative-polarity side one-way conducting devices mounted on a fitting surface of said negative-polarity side cooling plate, said rectifier being attached with a fitting screw to said casing whereby a direct-fitting surface of only one of either said positive-polarity side and said negative-polarity side cooling plates opposite to said fitting surface is brought closely into contact with a casing direct-fitting surface formed on an inner wall surface of said casing; wherein a thermally conductive silicone intervening member is interposed between said direct-fitting surface of the one cooling plate brought closely into contact with said casing direct-fitting surface and said casing direct-fitting surface to cover at least an area directly under respective said one-way conducting devices mounted on said fitting surface of the one cooling plate brought closely into contact with said casing direct-fitting surface to constitute an electric conducting portion in an area where said direct-fitting surface of the one cooling plate brought closely into contact with said casing direct-fitting sure and said casing direct-fitting surface come directly into contact with each other and a thermal conducting portion in an area where said direct-fitting surface of the one cooling plate brought closely into contact with said casing direct-fitting surface and said casing direct-fitting surface come closely into contact with each other with said thermally conductive silicone intervening member interposed therebetween.
Claim 10
Dependent Claim
279 words
An AC generator comprising; a rotor fitted over a shaft rotatably supported within a casing; a stator attached to said casing to surround said rotor; and a rectifier having a positive-polarity side cooling plate with a plurality of positive-polarity side one-way conducting devices mounted on a fitting surface of said positive-polarity side cooling plate, a negative-polarity side cooling plate with negative-polarity side one-way conducting devices mounted on a fitting surface of said negative-polarity side cooling plate, said rectifier being attached with a fitting screw to said casing whereby a direct-fitting surface of only one of either said positive-polarity side and said negative-polarity side cooling plates opposite to said fitting surface is brought closely into contact with a casing direct-fitting surface formed on an inner wall surface of said casing; wherein a thermally conductive silicone intervening member is interposed between said direct-fitting surface of the one cooling plate brought closely into contact with said casing direct-fitting surface and said casing direct-fitting surface to cover at least an area directly under respective said one-way conducting devices mounted on said fitting surface of the one cooling plate brought closely into contact with said casing direct-fitting surface to constitute an electric conducting portion in an area where said direct-fitting surface of the one cooling plate brought closely into contact with said casing direct-fitting sure and said casing direct-fitting surface come directly into contact with each other and a thermal conducting portion in an area where said direct-fitting surface of the one cooling plate brought closely into contact with said casing direct-fitting surface and said casing direct-fitting surface come closely into contact with each other with said thermally conductive silicone intervening member interposed therebetween.
References Cited (Backward Citations)
US3754169A
Cited
US3970881A
Cited
US3959676A
Cited
US3927338A
Cited
US3979659A
Cited
US4189653A
Cited
US4606000A
Cited
US4835427A
Cited
JPH08182279A
Cited
US5729063A
Cited
US5828564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-09-19 | 2004-03-20 | 2004-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-09-19 | 2008-03-20 | 2008-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-09-19 | 2012-03-20 | 2012-09-19 | $7700.00 | Window Closed / Lapsed |