Electric drive module having motor with heat sink insert in rotor shaft

US11626765B2 · kind B2 · utility

Assignee

• AMERICAN AXLE & MANUFACTURING, INC. · US

Inventors

• Jeffrey J. Ronning · Grosse Pointe Farms, US
• James P. Downs · South Lyon, US
• John C. Morgante · Sterling Heights, US
• Peter Fischer · Fishers, US
• David Crecelius · Noblesville, US
• Zugang Huang · Troy, US
• Paul J. Valente · Berkley, US

Key dates

• Filing date: Aug 8, 2018
• Grant date: Apr 11, 2023
• Expiry date: Jan 28, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K7/083
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A motor drive assembly having an electric motor with a rotor that includes a rotor shaft and a heat exchanger received in the rotor shaft. The heat exchanger has an insert body with an outer insert surface that is engaged to an inside surface of the rotor shaft. The insert body includes a plurality of segments. Each of the segments defines a first through-hole, and a plurality of second through-holes. Each of the segments is fixedly coupled to one another. A first flow passage extends through the first through-holes in the plurality of segments. Each of the second through-holes defines a portion of a corresponding second flow passage. The second flow passages are disposed concentrically about the first flow passage.