Apparatus and method for sensorless identification of rotating electrical equivalent circuit parameters of a three-phase asynchronous motor

US8587239B2 · 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: Nov 19, 2013
• Expiry date: Feb 22, 2032

Classification

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

Abstract

Identification of electrical equivalent circuit parameters (15) of a three-phase asynchronous motor (09) without a shaft encoder. The method comprises—Assumption of a standstill position of the rotor (11);—Equidirectional test signal infeed U1α, U1β in α and β in the stator axis direction of the asynchronous motor (09);—Measuring of a measuring signal I1α, I1β of the α and β axial direction of the asynchronous motor (09); and—Identification of equivalent circuit parameters of the asynchronous motor (09) on the basis of the test signal voltages U1α, U1β and of the measuring signal currents I1α, I1β; whereby the test signal feed allows the rotor (11) to remain torque-free. Determination of equivalent circuit parameters (15) of an asynchronous motor (09) as well relates to a motor control device (35), whereby the identified equivalent circuit parameters (15) can be used for the determination, optimization and monitoring of a motor control and for control of electrical drives.