Method and device for detecting the blocking of a stepper motor
AssigneeValeo Climatisation
InventorBruno Grendene
Life of this patent
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Abstract
The invention relates to a method of detecting the blocking of a three-phase stepper motor featuring three coils, characterised in that, with the stepper motor having its coils connected in star mode, with a common terminal (P), it implements a detection of a said blocking of the rotor of the motor, by supplying two of the said coils (A, B) with electricity in such a way that they are traversed by a current, and by measuring the voltage at an end terminal of the third coil (C). A comparison of the measured voltage is carried out with at least one given threshold.
Claims11
Method of detecting the blocking of a three-phase stepper motor featuring three coils, characterised in that, with the stepper motor (M) having its coils connected in star mode, with a common terminal (P), it implements a detection of a said blocking of the rotor of the motor, by supplying two of the said coils (A, B) with electricity in such a way that they are traversed by a current, and by measuring the voltage at an end terminal of the third coil (C), as well as by carrying out a comparison of the voltage measured with at least one given threshold (S1, S2).
Device for detecting the blocking of a three-phase stepper motor, characterised in that it includes:
- an electronic module for supplying the motor in star mode,
- an electronic blocking-detection module for supplying two coils (A, B) of the motor (M) in such a way that they are traversed by a current while a third coil is coupled to a measurement input of the electronic module.
Dependencies are inferred from the claim text.