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

US12355308B2 · 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: Nov 3, 2023
• Grant date: Jul 8, 2025
• Expiry date: Nov 3, 2043

Classification

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

Abstract

A motor drive system has a rotor assembly that is rotatable about an axis and includes a hollow shaft, a tube, and one or more fin sets. The tube is received in the shaft and defines a first passage. The fin sets are disposed about the tube and are engaged to the shaft. Each fin set defines a plurality of circumferentially spaced apart fins that are coupled to the shaft and the tube. The first passage is configured to discharge fluid communicated therethrough into a return chamber that is formed in the rotor assembly. A plurality of second passages are formed between the shaft and fins and are in fluid communication with the return chamber.