Electronically commutable motor

US7019479B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ralph Tobias · Baden-Baden, DE
• Stefan Beyer · Mering, DE
• Joerg Sutter · Gaggenau, DE
• Ingo Immendoerfer · Tamm, DE
• Heiko Frey · Gaggenau, DE

Key dates

• Filing date: Feb 27, 2003
• Grant date: Mar 28, 2006
• Expiry date: Feb 27, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/42
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

An electronically commutatable motor with a preferably three-phase excitation winding in the stator, which, in order to generate a torque for a permanent magnet rotor, can be connected to a direct current source via a motor control unit and a commutation device equipped with semiconductor switches. The motor is intended for use as a drive motor of a safety-critical auxiliary drive unit in a motor vehicle, in particular as the drive motor of an electrical power-assisted steering unit, wherein additional or existing switching means suppress or at least partially compensate for a braking moment that is generated by the motor in the event of a winding short and/or a malfunction in the semiconductor switches of the commutation device.