Electric motor with a power output stage and with efficient heat transport and method

US9455609B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Thomas Hennecke · Leinfelden, DE
• Michael Heim · Holzgerlingen, DE
• Hans Irion · Winnenden, DE
• Gerhard Braun · Judenhof, DE
• Frank Wehrmann · Bad Oeynhausen, DE
• Georg Voegele · Tettnang, DE
• Sigmund Braun · Tübingen, DE
• Johannes Hirschle · Mehrstetten, DE
• Alexander Fink · San Jose, US

Key dates

• Filing date: Sep 7, 2011
• Grant date: Sep 27, 2016
• Expiry date: Jan 9, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K5/04
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to an electric motor, in particular an electronically commutated electric motor. The electric motor has a stator, a rotor and a housing, which accommodates at least the stator and the rotor in a cavity. The electric motor also has a power output stage, which is connected to the stator and is designed to energize the stator in order to induce a rotating magnetic field. The power output stage has at least one power semiconductor with a thermal contact area, wherein the thermal contact area is thermally conductively connected to the housing, with the result that heat generated in the power semiconductor can be dissipated to the housing. According to the invention, the housing has a housing cup, which at least partially surrounds the cavity and is preferably thermally conductive and which has a cup wall, wherein the cup wall has a mating contact area corresponding to the thermal contact area.