Electrical machine with air-cooled control chip
First Claim
Patent Images
1. An electrical machine in the form of a generator for a motor vehicle, comprising:
- a housing (2);
a rotor (6), supported rotatably in the housing (2) about a pivot axis (5);
at least one fan (20), connected to the rotor (6), for generating a cooling air flow (22″
) from at least one intake opening (37″
) disposed in the housing (2) to at least one outlet opening (24) disposed in the housing (2); and
at least one regulator chip (31), directly disposed on a chip holder (30), for regulating the current generation, wherein the chip holder (30) is disposed such that it is bathed at least in part directly by the cooling air flow (22″
), is received in a recess (26) in the housing (2), and is thermally insulated by a thermal insulation (33″
) from the housing (2), wherein the at least one intake opening (37″
) in the housing (2) disposed immediately adjacent the chip holder (30) in the housing (2), so that waste heat from the chip holder (30) is already dissipated in the intake opening (37″
).
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Accused Products
Abstract
In an electrical machine, in particular a generator for a motor vehicle, having a housing (2), a rotor (6), supported rotatably in the housing (2) about a pivot axis (5), at least one fan wheel (20), connected to the rotor (6), for generating a cooling air flow (22, 22′, 22″) from at least one intake opening (37; 37′; 37″) disposed in the housing (2) to at least one outlet opening (24) disposed in the housing (2), and at least one regulator chip (31), disposed on a chip holder (30), for regulating the current generation, it is provided that the chip holder (30) is disposed such that it is bathed at least in part directly by the cooling air flow (22, 22′, 22″). As a result of this arrangement, it is attained that a very high heat transfer coefficient is present, because of the high flow speed of the cooling air flow (22, 22′, 22″).
23 Citations
7 Claims
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1. An electrical machine in the form of a generator for a motor vehicle, comprising:
-
a housing (2);
a rotor (6), supported rotatably in the housing (2) about a pivot axis (5);
at least one fan (20), connected to the rotor (6), for generating a cooling air flow (22″
) from at least one intake opening (37″
) disposed in the housing (2) to at least one outlet opening (24) disposed in the housing (2); and
at least one regulator chip (31), directly disposed on a chip holder (30), for regulating the current generation, wherein the chip holder (30) is disposed such that it is bathed at least in part directly by the cooling air flow (22″
), is received in a recess (26) in the housing (2), and is thermally insulated by a thermal insulation (33″
) from the housing (2),wherein the at least one intake opening (37″
) in the housing (2) disposed immediately adjacent the chip holder (30) in the housing (2), so that waste heat from the chip holder (30) is already dissipated in the intake opening (37″
). - View Dependent Claims (2, 3, 4)
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5. An electrical machine in the form of a generator for a motor vehicle, comprising:
-
a housing (2);
a rotor (6) supported rotatably in the housing (2) about a pivot axis (5);
at least one fan (20) connected to the rotor (6) for generating a cooling air flow (22) from at least one intake opening (37) disposed in the housing (2) to at least one outlet opening (24) disposed in the housing (2); and
at least one regulator chip (31) directly disposed on a chip holder (30) for regulating current generation, wherein the chip holder (30) is disposed such that the chip holder is bathed at least in part directly by the cooling air flow (22), is received in a recess (28) in the housing (2), and is thermally insulated by a thermal insulation (33) from the housing (2), wherein the at least one intake opening (37) in the housing 92) is spaced apart from the chip holder (30) in the housing (2).
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6. An electrical machine in the form of a generator for a motor vehicle, comprising
a housing (2); -
a rotor (6), supported rotatably in the housing (2) about a pivot axis (5);
at least one fan (20), connected to the rotor (6), for generating a cooling air flow (22″
) from at least one intake opening (37″
) disposed in the housing (2) to at least one outlet opening (24) disposed in the housing (2); and
at least one regulator chip (31), directly disposed on a chip holder (30), for regulating the current generation, wherein the chip holder (30) is configured integrally, is disposed such that it is bathed at least in part directly by the cooling air flow (22″
), is received in a recess (26) in the housing (2), and is thermally insulated by a thermal insulation (33″
) from the housing (2),wherein the at least one intake opening (37) in the housing (2) is disposed immediately adjacent the chip holder (30) in the housing (2), so that waste heat from the chip holder (30) is already dissipated in the intake opening (37″
).
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7. An electrical machine in the form of a generator for a motor vehicle, comprising
a housing (2); -
a rotor (6), supported rotatably in the housing (2) about a pivot axis (5);
at least one fan (20), connected to the rotor (6), for generating a cooling air flow (22) from at least one intake opening (37) disposed in the housing (2) to at least one outlet opening (24) disposed in the housing (2); and
at least one regulator chip (31), directly disposed on a chip holder (30), for regulating the current generation, wherein the chip holder (30) is configured integrally, is disposed such that it is bathed at least in part directly by the cooling air flow (22), is received in a recess (26) in the housing (2), and is thermally insulated by a thermal insulation (33) from the housing (2), wherein the at least one intake opening (37) in the housing (2) is spaced apart from the chip holder (30) in the housing (2).
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Specification
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Current AssigneeRobert Bosch GmbH
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Original AssigneeRobert Bosch GmbH
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InventorsBilsing, Thomas, Himmler, Frank, Doeffinger, Andreas, Henkel, Achim
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Primary Examiner(s)Tamai, Kabl
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Assistant Examiner(s)Comas, Yahveh
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Application NumberUS10/258,693Publication NumberTime in Patent Office1,193 DaysField of Search310/58, 310/52, 310/65, 310/89, 310/68.D, 310/64, 310/63US Class Current310/68.00DCPC Class CodesH02K 19/36 Structural association of s...H02K 19/365 with a voltage regulatorH02K 5/141 for cooperation with slip-r...H02K 9/06 with fans or impellers driv...H02K 9/28 Cooling of commutators, sli...
