Electromotive drive

US6661144B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Karl-Friedrich Diener · Gerolzhofen, DE
• Hermann-Josef Conraths · Schwabach, DE
• Werner G. Hopf · Carpentersville, US
• Wolfgang Lienert · Wendelstein, DE
• Ekkehard Pittius · Roth, DE
• Peter Seitz · Pommelsbrunn, DE

Key dates

• Filing date: Aug 6, 2001
• Grant date: Dec 9, 2003
• Expiry date: Aug 6, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02K2213/09
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The aim is to improve the cooling of a self-ventilated electric motor (1). To this end, an electromagnetic speed limiting and governing device is provided between the motor shaft (3) and the fan wheel (2), the fan wheel, which is driven via an electromagnetic slip coupling (6, 10) in accordance with the motor speed, being mounted freely rotatably on the motor casing or on the motor bearing plate (5).