Method and device for measuring the slip of a motor

Abstract

Abstract 1. A method for determining the slip of an asynchronous motor (1) fed from a multiphase source having a variable pulsation (2) without using a tachometric detector, by means of impedance measurements effected at its stator terminals, characterized in that it comprises the preliminary determination, starting from measurements effected on the stopped motor, of the stator resistance r1 and, on the off-load motor, of the reactance X0 for the different pulsations omega of the source which feeds the motor ; the preliminary determination of the resistance Rc and the reactance Xc of the motor, with locked rotor, for the different pulsations omega of the source feeding the motor ; measuring of the resistance R and of the reactance X of the motor in operation fed at a pulsation omega, and calculating the slip from the results of the preliminary determinations and the measurement of R and X, using a formula of the form : see diagramm : EP0101773,P11,F1 with : see diagramm : EP0101773,P11,F2

Inventors

• 👤 Francis Notelet
• 👤 Jacky Pillais

Bibliographic Details