US4056767A
Expired / Lapsed
US
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Cooling arrangement for semiconductor converter device
Assignee: Hitachi Ltd
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Filing: 1976-08-24
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Granted: 1977-11-01
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Expires: 1996-08-24
Abstract
Abstract In a converting device having two sets of converters, each of which includes planar type semiconductor controlled rectifier elements connected in a bridge configuration, with the converters being connected to a load, in a reverse-parallel configuration, so that the anode of one element is connected to the cathode of its parallel connected element, cooling fins are interposed between the planar type semiconductor controlled rectifier elements so that an individual cooling fin serves to cool directly adjacent elements disposed along the same axis in series with each other. As a result, the number of cooling fins can be sharply reduced. The converting device is especially effective for normal and reverse switching operations of a d.c. motor.
Inventors
- 👤 Masahiro Tobise
- 👤 Hiromasa Kogure
- 👤 Tadahiko Kanbara
- 👤 Hiroshi Koseki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:02
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/10; H10W90/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
In a converter circuit having two sets of converters, each including planar-type semiconductor controlled rectifier elements, connected in a bridge configuration, said converters being connected in parallel, with opposite polarities, to a load, an improved cooling arrangement for said converters wherein said rectifier elements are aligned in sequence along an axis so that the adjacent electrodes of adjacent rectifier elements which belong to respectively different converters are of opposite polarities with respect to each other; and cooling elements are interposed between each pair of adjacent rectifier elements wherein cooling elements are interposed between each adjacent rectifier element in said sequence.
Claim 2
Dependent Claim
100 words
In a converter circuit having two sets of converters, each including planar-type semiconductor controlled rectifier elements, connected in a bridge configuration, said converters being connected in parallel, with opposite polarities, to a load, an improved cooling arrangement for said converters wherein said rectifier elements are aligned in sequence along an axis so that the adjacent electrodes of adjacent rectifier elements which belong to respectively different converters are of opposite polarities with respect to each other; and cooling elements are interposed between each pair of adjacent rectifier elements wherein cooling elements are interposed between each adjacent rectifier element in said sequence.
Claim 3
Dependent Claim
118 words
In a multiphase converter circuit having two sets of converters, each including planar-type semiconductor controlled rectifier elements, connected in a bridge configuration, said converters being connected in parallel, with opposite polarities, to a load, and wherein anode reactor elements are connected between power supply lines for said circuit and said controlled rectifier element, an improved cooling arrangement for said converters wherein the rectifier elements disposed between each respective load terminal and associated anode reactor elements are aligned in sequence along an axis so that the adjacent electrodes of adjacent rectifier elements which belong to respectively different converters are of opposite polarities with respect to each other; and cooling elements are interposed between each pair of adjacent rectifier elements.
Claim 4
Dependent Claim
118 words
In a multiphase converter circuit having two sets of converters, each including planar-type semiconductor controlled rectifier elements, connected in a bridge configuration, said converters being connected in parallel, with opposite polarities, to a load, and wherein anode reactor elements are connected between power supply lines for said circuit and said controlled rectifier element, an improved cooling arrangement for said converters wherein the rectifier elements disposed between each respective load terminal and associated anode reactor elements are aligned in sequence along an axis so that the adjacent electrodes of adjacent rectifier elements which belong to respectively different converters are of opposite polarities with respect to each other; and cooling elements are interposed between each pair of adjacent rectifier elements.
Claim 5
Dependent Claim
102 words
In a multiphase converter circuit having two sets of converters, each including planar-type semiconductor controlled rectifier elements, connected in a bridge configuration, said converters being connected in parallel, with opposite polarities, to a load, and wherein anode reactor elements are connected between said controlled rectifier elements and said load, an improved cooling arrangement for said converters wherein the rectifier elements associated with each respective phase are aligned in sequence along an axis; and cooling elements are interposed between adjacent rectifier elements which belong to respectively different converters and the adjacent electrodes of which are of opposite polarities with respect to each other.
Claim 6
Dependent Claim
102 words
In a multiphase converter circuit having two sets of converters, each including planar-type semiconductor controlled rectifier elements, connected in a bridge configuration, said converters being connected in parallel, with opposite polarities, to a load, and wherein anode reactor elements are connected between said controlled rectifier elements and said load, an improved cooling arrangement for said converters wherein the rectifier elements associated with each respective phase are aligned in sequence along an axis; and cooling elements are interposed between adjacent rectifier elements which belong to respectively different converters and the adjacent electrodes of which are of opposite polarities with respect to each other.
Claim 7
Dependent Claim
22 words
In a multiphase converter circuit according to claim 3, wherein cooling elements are interposed between each adjacent rectifier element in said sequence.
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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |