Apparatus for determining the rotor angle of a synchronous...

Details Apparatus for determining the rotor angle of a synchronous... Apparatus for determining the rotor angle of a synchronous...

G - Physics

08

C

354/25

G08C 21/00 (2006.01) G01R 31/34 (2006.01) H02P 21/10 (2006.01)

Patent

CA 1179775

ABSTRACT OF THE DISCLOSURE Apparatus for determining the rotor angle of a synchronous machine relative to a fixed axis is disclosed. A field position sensor measures the voltage induced in the stator with the stator winding current off when the rotor winding current is turned on, and provides a rotating magnetic flux vector angular position to set an integrator to a starting value for rotor angle position. Thereafter the integrator integrates the rotary speed signal fed from a tachometer. A function former responds to the integrator sum of the initial rotor angle and the integrated rotary speed signal to provide a rotor angle signal for control of the machine. The disclosed apparatus provides simple, relatively inexpensive rotary angle measurement.

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