Patent US3573593A successfully refreshed from Google Patents.
US3573593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angular velocity control system for step servo motor system responsive to winding deenergization
Assignee: Unisys Corp
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Filing: 1969-04-01
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Granted: 1971-04-06
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Expires: 1989-04-01
Abstract
Abstract The disclosure embodies an electrical system for a bidirectional step servomotor to control the dissipation of counter torque developed by the deenergization of each rotor coil. The amplitude of the induced voltage generated when each rotor coil is deenergized is electrically controlled by a selected one of a plurality of voltage regulators. Each voltage regulator has a different regulating voltage. The larger the amplitude of the induced voltage, the faster the dissipation time of the counter torque, therefore, the higher the angular velocity of the rotor.
Inventors
- 👤 Jack Beery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:24
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/14; H02P8/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A system to control the angular velocity of the rotor of an electric stepping motor, said system comprising: a magnetic rotor; a plurality of stator windings equally and angularly spaced about said rotor and electrically connected to a source of voltage; a plurality of switch means electrically connected in series circuit respectively with said stator windings, said switch means operable to simultaneously effect the deenergization of a selected one of said stator windings and the energization of an adjacent stator winding causing the rotor to rotate; and a velocity control member electrically connected to said switch means and responsive to the deenergization of each of said stator windings regulating the angular velocity of said rotor.
Claim 2
Independent Claim
115 words
A system to control the angular velocity of the rotor of an electric stepping motor, said system comprising: a magnetic rotor; a plurality of stator windings equally and angularly spaced about said rotor and electrically connected to a source of voltage; a plurality of switch means electrically connected in series circuit respectively with said stator windings, said switch means operable to simultaneously effect the deenergization of a selected one of said stator windings and the energization of an adjacent stator winding causing the rotor to rotate; and a velocity control member electrically connected to said switch means and responsive to the deenergization of each of said stator windings regulating the angular velocity of said rotor.
Claim 3
Dependent Claim
28 words
The system to control the angular velocity of the rotor of an electric stepping motor according to claim 1 wherein the velocity control member is a voltage regulator.
Claim 4
Dependent Claim
102 words
The system to control the angular velocity of the rotor of an electric stepping motor according to claim 1 further including a switch member connected in electrical parallel circuit with said first-mentioned velocity control member, said switch member normally open, and another velocity control member connected in electrical series circuit with said switch member and in electrical parallel circuit with said first-mentioned velocity control member, said another velocity control member responsive to the deenergization of each of said stator windings when said switch member is closed to regulate the angular velocity of said rotor below that of said first-mentioned velocity control member.
Claim 5
Independent Claim
184 words
A system to control the angular velocity of a step servomotor, said system comprising: a magnetic rotor having a plurality of selectable positions; a plurality of separately energizable induction coils equally and angularly spaced about the axis of said rotor, said coils consecutively energized to rotate said rotor, one end of each of said coils electrically connected to a source of voltage; a coil control member electrically connected to the other end of each of said induction coils selectively controlling the energization of one of said coils and the deenergization of an adjacent coil causing the rotor to rotate; an isolation diode having a first end electrically connected to the other end of each of said coils, said diode electrically connected for the conduction of current from said source of voltage and the second ends of said diodes electrically connected together; and a velocity control member electrically connected between said second ends of said isolation diodes and the source of power, said velocity control member conductively responsive to the deenergization of said induction coils and operable to control the angular velocity of said rotor.
Claim 6
Independent Claim
184 words
A system to control the angular velocity of a step servomotor, said system comprising: a magnetic rotor having a plurality of selectable positions; a plurality of separately energizable induction coils equally and angularly spaced about the axis of said rotor, said coils consecutively energized to rotate said rotor, one end of each of said coils electrically connected to a source of voltage; a coil control member electrically connected to the other end of each of said induction coils selectively controlling the energization of one of said coils and the deenergization of an adjacent coil causing the rotor to rotate; an isolation diode having a first end electrically connected to the other end of each of said coils, said diode electrically connected for the conduction of current from said source of voltage and the second ends of said diodes electrically connected together; and a velocity control member electrically connected between said second ends of said isolation diodes and the source of power, said velocity control member conductively responsive to the deenergization of said induction coils and operable to control the angular velocity of said rotor.
Claim 7
Dependent Claim
97 words
The system to control the angular velocity of a step servomotor according to claim 4 further including a switch member connected in electrical parallel circuit with said first-mentioned velocity control member, said switch member normally open, and another velocity control member connected in electrical series circuit with said switch member and in electrical parallel circuit with said first-mentioned velocity control member, said another velocity control member responsive to the deenergization of each of said coils when said switch member is closed to regulate the angulaR velocity of said rotor below that of said first-mentioned velocity control member.
Claim 8
Dependent Claim
31 words
The system to control the angular velocity of a step servo motor according to claim 5 wherein said first-mentioned velocity control member and said another velocity control member are voltage regulators.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |