The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1996
Filed:
Dec. 28, 1994
Hydro-Quebec, Montreal, CA;
Abstract
The method and the apparatus are for starting up a synchronous machine having a rotor and a stator provided with a winding. The rotor has an initial position with respect to the stator. The method comprises the steps of (a) initializing a starting phase of a first vectorial sum of successive vectorial sums of currents to be applied to the winding; (b) applying successive vectorial sums of currents to the winding; (c) detecting, for each of the vectorial sums of currents applied in step (b), a movement of the rotor and a direction thereof; (d) compensating, for each of the movement and direction detected in step (c), the phase of a subsequent vectorial sum of currents applied to the winding to bring back the rotor towards its initial position; (e) detecting whether the rotor has moved with respect to the stator after applying of the successive vectorial sums of currents and either increasing the starting phase by a value different from a multiple of 180 electrical degrees if the rotor has not moved and returning to step (b), or going to a step (f); and (f) after step (e), storing the phase value of the last of the successive vectorial sums applied to the winding, whereby said machine is now ready to operate from the phase value stored in step (f).