Collectorless direct current motor, driver circuit for a drive and method of operating a collectorless direct current motor

USRE37589E1 · kind E1 · reissue

Assignee

• Papst Licensing GmbH & Co. KG · DE

Inventor

• Rolf Mueller · Ingolstadt, DE

Key dates

• Filing date: May 16, 1994
• Grant date: Mar 19, 2002
• Expiry date: May 16, 2014

Classification

• Technology area (CPC —): General

Abstract

A method for the low-loss regulation of a collectorless direct current motor and a semiconductor circuit has, during the commutation phase given by a position sensor and with reduced motor output and number of revolutions, transistors or one end transistor which initially operates temporarily as a switch and thereafter operates temporarily as an analog amplifier element. During the analog period, a current is available which changes slowly according to a ramp function.