Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1976-02-17
1978-03-28
Rubinson, Gene Z.
Electricity: motive power systems
Open-loop stepping motor control systems
318227, H02K 3700
Patent
active
040817350
ABSTRACT:
A control system moves an inductively controlled multi-phase motor in a forward or reverse direction. The motion may be in steps or it may be a continuous rotation. Dynamic braking of the rotation in either direction, either in steps or continuous rotation, is achieved by activating one or more phases of the multi-phase motor that lag the selected phase. Detent is accomplished by deactivating the lagging phase or phases at a prescribed time so that the selected rotational phase will then be applied to stop the motor at the desired motor pole.
The speed at which the motor is moving when the lagging phase or phases are selected is measured by a velocity correction circuit that causes more current to be sent through the motor coils associated with the lagging phase or phases when the velocity is high than when it is low.
When the rotation of the motor is continuous and stopping is required, the dynamic braking circuitry continually compares the decaying voltage of a predetermined standard RC time constant circuit with the decaying voltage of a measuring RC time constant circuit that varies in accordance with the velocity of the motor. A comparator circuit compares the two voltages and, until they reach a minimal prescribed difference, causes a current to flow in the motor coils associated with the lagging phase or phases. When a limit is reached, two specified motor phases are selected, one being a lagging phase, the lagging phase being deactivated after a prescribed period of time has elapsed, so that the motor then detents at the prescribed motor pole.
REFERENCES:
patent: 3423658 (1969-01-01), Barrus
patent: 3757191 (1973-09-01), Agati et al.
patent: 3767993 (1973-10-01), Yablonski
patent: 3789971 (1974-02-01), Deyesso et al.
patent: 3849714 (1974-11-01), Goretzki et al.
Devine Thomas G.
Grossman Rene E.
Rubinson Gene Z.
Texas Instruments Incorporated
LandOfFree
Motion control system for an inductively controlled multi-phase does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motion control system for an inductively controlled multi-phase , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motion control system for an inductively controlled multi-phase will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-644929