Brushless electric motor for rotating a fan of a motor-driven ventilation unit of a vehicle

Patent metadata

Field	Value
Publication number	US-12546326-B2
Application number	US-202118266684-A
Country	US
Kind code	B2
Filing date	Oct 6, 2021
Priority date	Dec 11, 2020
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

Described is a brushless electric motor for rotating a fan of a ventilation unit of a vehicle. The brushless electric motor includes at least one electric conduction device, a rotor, a stator equipped with at least two coils and a casing housing a servo circuit and a power circuit. The electric conduction device is configured to convey an electric current to the power circuit from a power supply of the vehicle. The power circuit is configured to connect the electric conduction device electrically to the coils, where the electrical connection is dependent upon the servo circuit. At least a portion of the casing is interposed between at least a portion of the power circuit and a connector placed at one end of the electric conduction device.

First claim

The invention claimed is:

1 . A brushless electric motor for rotating a cooling fan of a fan system for a vehicle, comprising:
at least one electrical conduction device; a rotor; a stator equipped with at least two coils; and a housing accommodating a feedback control circuit and a power circuit, the electrical conduction device being configured to convey an electric current to the power circuit from an electrical power supply of the vehicle, the power circuit being configured to electrically connect the electrical conduction device to the coils, the electrical connection being controlled by the feedback control circuit, wherein at least one part of the housing is interposed between at least one portion of the power circuit and a connector placed at one end of the electrical conduction device,
wherein the portion of the power circuit, the connector, and the part of the housing that is interposed between the portion of the power circuit and the connector form a stack, and
wherein the stack comprises a through-duct which extends from a first opening formed in the first portion of the power circuit to a second opening formed in the connector.

2 . The brushless electric motor as claimed in claim 1 , wherein at least one electrical connection between the electrical conduction device and the power circuit is disposed in the through-duct.

3 . The brushless electric motor as claimed in claim 2 , wherein the electrical connection is a weld between at least one end of at least one electrical wiring of the electrical conduction device and at least one electrically conductive track of the power circuit.

4 . The brushless electric motor as claimed in claim 1 , wherein the through-duct is filled with at least one sealing element.

5 . The brushless electric motor as claimed in claim 1 , wherein the first opening is at least partially closed by a cap.

6 . The brushless electric motor as claimed in claim 5 , comprising multiple electrical connections between the electrical conduction device and the power circuit, wherein the cap comprises at least one compartmentalizing element of the through-duct configured to insulate a plurality of electrical connections from one another.

7 . The brushless electric motor as claimed in claim 5 , wherein the cap is fixed to the connector by at least one fixing element.

8 . The brushless electric motor as claimed in claim 1 , wherein a second opening is closed by a cover which at least partially covers the connector.

9 . A fan system of a thermal treatment module for a vehicle, comprising:
a cooling fan; and at least one brushless electric motor as claimed in claim 1 , the brushless electric motor being connected to the cooling fan by a shaft and being configured to drive the rotation of the cooling fan.

Assignees

• Valeo Systemes Thermiques

Inventors

• Bonneau David
• Cambronne Olivier
• Vigor Dorian

Classifications

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K5/225 Primary

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title

• F01P2005/046

  with electrical pump drive · CPC title

• F01P5/04

  Pump-driving arrangements · CPC title

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title