US 12,003,168 B2Granted

Rotary electric machine

AssigneeKYB Corporation

InventorsYuu Eguchi, Haruki Tomita, Shun Matsuda

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Abstract

Increase the heat dissipation effect of the heat sink on the heat generating element. In the rotary electric machine, the portions of the circuit board that are installed in the first and the second installation portion of the heat-sink are configured as non-coated portions, and the non-coated portion is not coated with resist. Therefore, the circuit board can be installed in the first and the second installation portion of the heat-sink without being affected by the variation in the film thickness of the resist. Thus, the gap between the FET mounted on the circuit board and the first to third heat dissipating portion of the heat-sink can be set as small as possible. Therefore, the heat generated by the FET can be efficiently transferred to the heat-sink. As described above, the heat dissipation effect of the heat-sink on the FET can be enhanced.

Claims2

Dependent claims

A rotary electric machine, comprising:

a motor unit with a bottomed cylindrical housing with one end in the axial direction closed;
a heat-sink that closes the opening of the housing and has a protruding installation portion;
a substrate that is fixed to the installation portion and is configured as a non-coating portion to which the portion installed in the installation portion is not coated with a resist;
a heat generating element mounted on a surface of the substrate facing the heat-sink;
and
a heat transfer member provided between the heat-sink and the heat generating element;
the installation portion having a first installation portion extending in the circumferential direction on the outer peripheral portion of the heat-sink;
a ground pattern being formed on the non-coated portion installed in the first installation portion;
and
the heat generating element being arranged inside the first installation portion when viewed from the plate thickness direction of the substrate.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/615,731Filed 26 Mar 2020
Priority: JP 2019-11074814 Jun 2019
Published: US 2022/0247275 A14 Aug 2022
Granted: 4 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H02K 9/22
Arrangements for cooling or ventilating: by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g.…
H02K 11/33
Structural association with control circuits or drive circuits: drive circuits, e.g. power electronics
H02K 5/04
Casings; Enclosures; Supports: casings or enclosures characterised by the shape, form or construction thereof
H02K 5/225
Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes: terminal boxes or…

Family

US 2022/0247275 A1Pre-grant publication · published 4 Aug 2022
US 12,003,168 B2This patent

From the US filing history. Foreign family members aren’t listed.

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