Power supply device for a wound rotor

The power supply device for a wound rotor addresses complexity and reliability issues by using a two-part rotor shaft with specific receiving and sealing surfaces and an electrical connection element, ensuring reliable and compact motor operation at high speeds.

FR3166491A1Pending Publication Date: 2026-03-20AMPERE SAS
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Patent Information

Application Number
FR2024009756
Authority / Receiving Office
FR · FR
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-09-13
Publication Date
2026-03-20

AI Technical Summary

Technical Problem

The architecture of wound rotor electric motors in motor vehicles is complex due to the need for power supply to coils, cooperation with bearings, and sealing, while requiring compactness, reliability, and quiet operation, especially at high speeds.

Method used

A power supply device for a wound rotor with a rotor shaft comprising two parts, each with specific receiving and sealing surfaces, and an electrical connection element with slip rings and radial arms, ensuring reliable operation and assembly simplicity.

Benefits of technology

Enables reliable, quiet, and compact operation of the electric motor at high speeds without noise or vibration, using standard bearings and simplified manufacturing.

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Abstract

Power supply device for a wound rotor. Power supply device for a wound rotor of an electric motor (1F) of a motor vehicle, comprising: - a rotor shaft (6F) comprising a first part (61F) and a second part (62F), the second part comprising a socket portion (63F) through which the second part is fixed to the first part, - an electrical connection element (10F) comprising a slip ring (16F, 17F), an electrical connector (22F) for connection to a first end of a coil of the wound rotor, and a conductor (24F) electrically connecting the slip ring to the connector, the connection element further comprising a radial arm (27F), the conductor extending within the radial arm, the socket portion (63F) comprising a notch (66F) through which the radial arm extends. Figure for the abbreviation: Figure 4
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