Method and apparatus for determining the angle between the air-g

Details Method and apparatus for determining the angle between the air-g Method and apparatus for determining the angle between the air-g

1982-03-29

1985-02-26

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

322 99, G01R 3102

Patent

active

045020051

ABSTRACT:
According to the method, current blocks of the stator currents are transformed into square waves of constant amplitude and the current blocks of the stator currents are extended to 180.degree. el. Fundamental components are filtered out from the stator voltages and the phase of the fundamental components are shifted lagging 90.degree. el. The phase-shifted fundamental components are connected into square waves of constant amplitude, at least one square wave of the currents is multiplied by the square wave of the voltage phase following the current phase, and the mean value thereof is formed. There is also an apparatus for implementing the method.

REFERENCES:
patent: 4345198 (1982-08-01), Wolfinger
Blaschke, V. F.; "Das Prinzip . . . "; Siemens-Zeitschrift; 45 (1971); No. 10; pp. 757-760.
Bodefeld et al.; Elektrische Maschinen; pub. by Springer-Verlag; 1949.
Weninger, R.; "Verfahren zur . . . "; etz Archiv; (1979); No. 12; pp. 341-345.

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