Electric drive unit

US7345386B2 · kind B2 · utility

Assignees

• Conti Temic microelectronic GmbH · DE
• Temic Automotive Electric Motors GmbH · DE

Inventors

• Viktor Dano · Erlangen, DE
• Hans-Joachim Fach · Nürnberg, DE
• Ferdinand Friedrich · Heroldsberg, DE
• Matthias Gramann · Neunkirchen, DE
• Reinhard Orthmann · Leonberg, DE
• Hermann Pirner · Illschwang, DE
• Thomas Schencke · Ahrensfelde, DE
• Thomas Susemihl · Würzburg, DE
• Wolfgang Thiel · Köngen, DE
• Dietrich Von Knorre · Sandkrug, DE

Key dates

• Filing date: Nov 27, 2002
• Grant date: Mar 18, 2008
• Expiry date: Sep 13, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K9/06
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An electric drive unit includes an electric motor for driving a fan. The motor has an electronic control module. An impeller wheel for producing a working air flow is mounted by bearings on an axle of the electric motor. The hub of the impeller wheel has at least one preferably two walls enclosing a cooling space or cooling space portions. At least one cooling surface of a cooling body is in contact with components of the electronic control module and projects into the cooling space. A gap formed between the hub of the impeller wheel and a carrier section communicates with an inner hub space. Holes (43, 322) communicating with the hub inner space are provided in at least one component of the electric drive unit. When the impeller wheel rotes a convection cooling air flow is established between the gap and the holes.