Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1980-02-14
1983-05-03
Dobeck, B.
Electricity: motive power systems
Open-loop stepping motor control systems
318254, 318327, 318685, H02K 2900
Patent
active
RE0312290
ABSTRACT:
A control circuit for operating a stepping motor from a DC power source by switching current successively through four stator windings. Switching time in relation to shaft position is controlled by sensing the back EMF in the stator coils, the sensing circuit including a transformer having a first winding connected in series with two windings and the second winding connected in series with the other two windings of the stator. The voltages across the two windings at the transformer are used to generate a commutation pulse each time the voltages are equal. Each commutation pulse is generated in this manner at predetermined angular positions (phase) of the stepping motor independently of motor speed or supply voltage. The commutation pulses are then used to generate clock pulses for sequencing the switching of the stator windings.
REFERENCES:
patent: 3304481 (1967-02-01), Saussele
patent: 3727121 (1973-04-01), Rich
patent: 4065708 (1977-12-01), Ulland et al.
LandOfFree
Stepping motor control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Stepping motor control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stepping motor control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1204773