Patent US2639072A successfully refreshed from Google Patents.
Patent US4513236A successfully refreshed from Google Patents.
US4513236A
Expired / Lapsed
US
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Control method for stepping motor
Assignee: Canon Inc
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Filing: 1983-06-29
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Granted: 1985-04-23
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Expires: 2003-06-29
Abstract
Abstract This invention discloses a control method for a novel stepping motor and a novel stepping motor of unipolar or bipolar winding, in which an inverse electromotive force generated in the unenergized coils is utilized for motor control.
Inventors
- 👤 Noriyuki Kikukawa
- 👤 Yasuaki Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:15
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/32
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
68 words
A control method for controlling the operation of a stepping motor having a rotor, said method comprising the steps of energizing plural coils in succession to move the stepping motor rotor to a target point, and coupling two coils to one another, other than a coil being energized, to define a closed circuit containing said two coils, said coupling step comprising the step of grounding said two coils.
Claim 2
Dependent Claim
68 words
A control method for controlling the operation of a stepping motor having a rotor, said method comprising the steps of energizing plural coils in succession to move the stepping motor rotor to a target point, and coupling two coils to one another, other than a coil being energized, to define a closed circuit containing said two coils, said coupling step comprising the step of grounding said two coils.
Claim 3
Dependent Claim
28 words
A control method for controlling the operation of a stepping motor according to claim 1 including the further step of temporarily interrupting the energization of said energized coil.
Claim 4
Dependent Claim
28 words
A control method for controlling the operation of a stepping motor according to claim 1, wherein said coupling step comprises the step of concurrently energizing said two coils.
Claim 5
Dependent Claim
65 words
A control method for controlling the operation of a stepping motor having a rotor, said method comprising the steps of energizing plural coils in succession to move the stepping motor rotor to a target point, coupling two coils to one another, other than a coil being energized to define a closed circuit containing said two coils; and temporarily interrupting the energization of said energized coil.
Claim 6
Dependent Claim
65 words
A control method for controlling the operation of a stepping motor having a rotor, said method comprising the steps of energizing plural coils in succession to move the stepping motor rotor to a target point, coupling two coils to one another, other than a coil being energized to define a closed circuit containing said two coils; and temporarily interrupting the energization of said energized coil.
Claim 7
Dependent Claim
27 words
A control method for controlling the operation of a stepping motor according to claim 4 wherein said coupling step comprises the step of connecting said two coils.
Claim 8
Dependent Claim
28 words
A control method for controlling the operation of a stepping motor according to claim 4, wherein said coupling step comrprises the step of concurrently energizing said two coils.
Claim 9
Dependent Claim
27 words
A control method for controlling the operation of a stepping motor according to claim 4 wherein said coupling step comprises the step of grounding said two coils.
Claim 10
Dependent Claim
116 words
A stepping motor control device comprising: a plurality of separately energizable coils; a movable member arranged for movement in response to sequential energization of said coils; means for energizing said coils sequentially; and means for stopping the motor, including switch means arranged to couple two coils to one another, other than a coil being energized, to define a closed circuit containing said two coils, wherein said coils are connected mutually in parallel across a current supply source, each of said coils having associated therewith respective switch means for sequentially energizing the coils from the source, and wherein said stopping means includes means for operating two of said respective switch means concurrently to define said closed circuit.
Claim 11
Dependent Claim
116 words
A stepping motor control device comprising: a plurality of separately energizable coils; a movable member arranged for movement in response to sequential energization of said coils; means for energizing said coils sequentially; and means for stopping the motor, including switch means arranged to couple two coils to one another, other than a coil being energized, to define a closed circuit containing said two coils, wherein said coils are connected mutually in parallel across a current supply source, each of said coils having associated therewith respective switch means for sequentially energizing the coils from the source, and wherein said stopping means includes means for operating two of said respective switch means concurrently to define said closed circuit.
Claim 12
Dependent Claim
30 words
A stepping motor control device according to claim 8 wherein the two coils connected in said closed circuit are disposed on opposite sides of the coil defining said stop position.
Claim 13
Dependent Claim
16 words
A stepping motor control device according to claim 8 wherein said switching means comprises a transistor.
Claim 14
Dependent Claim
21 words
A stepping motor control device according to claim 8 further including means for temporarily interrupting the energization of said energized coil.
Claim 15
Dependent Claim
30 words
A stepping motor control device according to claim 8 wherein the two coils connected in said closed circuit are disposed on opposite sides of the coil defining the stop position.
Claim 16
Dependent Claim
85 words
A stepping motor control device comprising: a plurality of separately energizable coils; a movable member arranged for movement in response to sequential energization of said coils; means for energizing said coils sequentially; and means for stopping the motor, including switch means arranged to couple two coils to one another, other than a coil being energized, to define a closed circuit containing said two coils, wherein the two coils connected to said closed circuit are disposed on opposite sides of the coil defining said stop position.
Claim 17
Dependent Claim
85 words
A stepping motor control device comprising: a plurality of separately energizable coils; a movable member arranged for movement in response to sequential energization of said coils; means for energizing said coils sequentially; and means for stopping the motor, including switch means arranged to couple two coils to one another, other than a coil being energized, to define a closed circuit containing said two coils, wherein the two coils connected to said closed circuit are disposed on opposite sides of the coil defining said stop position.
Claim 18
Dependent Claim
16 words
A stepping motor control device according to claim 13 wherein said switching means comprises a transistor.
Claim 19
Dependent Claim
21 words
A stepping motor control device according to claim 13, further including means for temporarily interrupting the energization of said energized coil.
References Cited (Backward Citations)
GB1151037A
Cited
FR1555056A
Cited
GB1439991A
Cited
EP0012885A1
Cited
US4218643A
Cited
US4329635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |