Method of determining the displacement angle of an electric moto

Details Method of determining the displacement angle of an electric moto Method of determining the displacement angle of an electric moto

1974-11-26

1976-09-14

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

318490, G01R 3100

Patent

active

039809501

ABSTRACT:
The method of the present invention consists in passing a pulsating current through two series-connected working phase windings of the stator of an electric motor and determining the relationship between the displacement angle and phase voltages and line voltages across said windings.
This relationship is then used for determining the displacement angle of the electric motor which in this case is a synchronous reluctance motor operating in braking duty under conditions where there is no access to the motor shaft. Normally, this is the case with motors employed as an actuating means in the control and protection systems of nuclear reactors.
The device for carrying out the above method comprises a voltage comparison unit and an indicating instrument.

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