Cooling device for an electric motor

US9991765B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Esteban Grau Sorarrain · Düsseldorf, DE
• Christian Jäkel · Duisburg, DE
• Mario Koebe · Mülheim an der Ruhr, DE
• Matthias Kowalski · Mülheim an der Ruhr, DE
• Christoph Lehmann · Neukirchen-Vluyn, DE
• Andrey Mashkin · Burbach, DE
• Olga Plotnikova · Wuppertal, DE
• Carolin Schild · Mülheim an der Ruhr, DE

Key dates

• Filing date: Sep 3, 2014
• Grant date: Jun 5, 2018
• Expiry date: Dec 30, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K9/225
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A cooling device for an electric motor includes at least one closed capillary tube, within which a cooling fluid is located and which is introduced into an opening of a lamination stack of the electric motor such that the capillary tube is connected to the lamination stack to conduct heat and partially projects out of the lamination stack, such that the capillary tube has a cold end disposed outside and a hot end disposed inside the lamination stack. The cooling fluid and the degree of filling of the capillary tube with the cooling fluid is chosen such that an input of heat from the lamination stack into the capillary tube leads to evaporation of the cooling fluid, and the cold end of the capillary tube is cooled such that vapor produced during the evaporation condenses and heat input into the capillary tube is dissipated out of the capillary tube.