Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1997-10-27
1999-02-23
Sircus, Brian
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318592, 318652, G05B 1929
Patent
active
058748210
ABSTRACT:
The invention relates to a method for controlling an electric motor, in particular of a brushless electric motor, whereby the absolute phase position of a rotor in relation to a stator of the electric motor (4) is determined, and to an apparatus for the method. A characteristic feature of the invention is that one or several movement(s) of the rotor are excited, the absolute phase position of the rotor in relation to the stator is measured, and the absolute phase position is deduced therefrom.
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