Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Patent
1994-12-28
1996-07-16
Ro, Bentsu
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
318722, 318430, 318254, H02P 146
Patent
active
055370209
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).
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Couture Pierre
Francoeur Bruno
Lambert Ghislain
Hydro-Quebec
Ro Bentsu
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