Apparatus and method for rotating-sensorless identification of mechanical parameters of a three-phase asynchronous motor

US8604745B2 · kind B2 · utility

Assignee

• Baumueller Nuernberg GmbH · DE

Inventors

• Sebastian Villwock · Pechbrunn, DE
• Heiko Zatocil · Koblenzer Straße, DE

Key dates

• Filing date: Aug 9, 2011
• Grant date: Dec 10, 2013
• Expiry date: Mar 15, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02P2207/01
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A method for the identification without shaft encoder of magnetomechanical characteristic quantities of a three-phase asynchronous comprising: —constant voltage impression U1α in α axial direction in order to generate a constant magnetic flux; —test signal voltage supply U1β in β axial direction of the asynchronous motor, whereby the α axial direction remains supplied with constant current; —measuring signal current measurement I1β in β stator axial direction of the asynchronous motor; —identification of mechanical characteristic quantities of the asynchronous motor based on the test signal voltage U1β and on the measuring signal current I1β, whereby the rotor can execute deflection movements. Method can also be used for control of electrical drives. An identification apparatus for the determination of mechanical characteristic quantities of an asynchronous motor and for motor control, whereby the identified characteristic quantities can be used to determine, optimize and monitor a motor control.