US3742329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping motor control including pulse responsive means to deenergizepresently energized windings while delaying energization of windings to be energized
Assignee: Superior Electric Co
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Filing: 1971-09-29
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Granted: 1973-06-26
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Expires: 1991-09-29
Abstract
Abstract A motor control circuit for accepting an input pulse and changing the energization of the windings of a stepping motor to produce an incremental movement. Each energization of a winding is delayed for a duration equal to the extent of the pulse which is adjustable to enable dissipation of energy in the winding being deenergized and to accommodate delay in semiconductor turn on and turn off times. The circuit includes gates and a pair of bistable means for directing the proper sequence of winding changes of energization.
Inventors
- 👤 I Giguere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:56
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/14; H02P8/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
In a motor control circuit for use with a stepping motor for translating each input pulse to the control circuit into a change of energization of windings of the motor, said motor windings being connected into a plurality of phases with each change of energization altering the energization in a phase by deenergizing some windings of the phase and energizing other windings, the improvement comprising means for causing each input pulse to have a definite duration and means for deenergizing the some windings and delaying the energization of the other windings of the phase for the duration of the pulse.
Claim 2
Dependent Claim
100 words
In a motor control circuit for use with a stepping motor for translating each input pulse to the control circuit into a change of energization of windings of the motor, said motor windings being connected into a plurality of phases with each change of energization altering the energization in a phase by deenergizing some windings of the phase and energizing other windings, the improvement comprising means for causing each input pulse to have a definite duration and means for deenergizing the some windings and delaying the energization of the other windings of the phase for the duration of the pulse.
Claim 3
Dependent Claim
44 words
The invention as defined in claim 1 in which the system is responsive to command pulses having a duration different than the input pulse and there are means for receiving each command pulse and shaping it into an input pulse having a determined duration.
Claim 4
Dependent Claim
28 words
The invention as defined in claim 2 in which the pulse shaping means includes a monostable flip-flop having an output that constitutes the input pulse to the system.
Claim 5
Dependent Claim
21 words
The invention as defined in claim 2 in which the receiving and shaping means includes means for adjusting the determined duration.
Claim 6
Dependent Claim
75 words
The invention as defined in claim 1 in which each winding set is connected to a source of energy through a semiconductor, means causing each semiconductor to be rendered non-conducting upon receipt of one logical binary signal and to be rendered conducting upon receipt of The other logical binary signal and means for receiving at least some of said input pulses and always producing the one signal for the duration of the received input pulse.
Claim 7
Dependent Claim
57 words
The invention as defined in claim 5 in which the last named means includes a logic gate having an input controllably connected to receive input pulses and another input connected to receive instructions to cause the gate to produce the one or other binary signal with the instructions determining the signal in the absence of a pulse.
Claim 8
Dependent Claim
39 words
The invention as defined in claim 5 in which there are two phases and in which there are shifting means for conducting each input pulse to all the input pulse receiving means for the phase having its energization changed.
Claim 9
Dependent Claim
73 words
The invention as defined in claim 7 in which the shifting means includes two gates, each having two inputs, in which one input of each is connected to receive the input pulse and in which the other input is connected to steering means for producing a signal which causes one shifting gate to change its output while preventing the other shifting gate from altering its output for the duration of the input pulse.
Claim 10
Dependent Claim
84 words
The invention as defined in claim 2 in which the circuit includes a direction terminal for receiving either one or the other of two binary representations in which the windings are energized in a repeatable sequence to cause the stepping motor to move in one direction and a reversal of the replatable sequence to cause the motor to move in the opposite direction and means for receiving the direction representation and causing said circuit to provide the repeatable sequence dictated by the direction representation.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |