US4389605A
Expired / Lapsed
US
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Pulse motor driving apparatus
Assignee: Canon Inc
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Filing: 1981-12-30
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Granted: 1983-06-21
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Expires: 2001-12-30
Abstract
Abstract A pulse motor is improved in its stability at the time of low revolution while maintaining the possibility of high revolution. Between the terminals of pulse motor windings there are parallel-connected current control means. The braking effect of said current control means is controlled depending upon the revolution of the pulse motor so as to stabilize the revolution at a low speed. It assures also a high speed revolution when desired. This arrangement of the invention enables to provide a pulse motor which is small in size and low in cost. When the present invention is embodied in a driving system for a carriage of printing head in a printer, all the performances required therefor can be attained.
Inventors
- 👤 Atsushi Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:04
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/14; H02P8/20
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
72 words
A pulse motor driving apparatus comprising: resistor means having an electric resistance connected in series with the winding of a pulse motor and with rectifying means having a rectification characteristic to form a closed circuit and control means connected in parallel with said resistor means and disposed to control said resistor means in such manner that at the time of low revolution of said pulse motor said resistor means may be short-circuited.
Claim 2
Dependent Claim
72 words
A pulse motor driving apparatus comprising: resistor means having an electric resistance connected in series with the winding of a pulse motor and with rectifying means having a rectification characteristic to form a closed circuit and control means connected in parallel with said resistor means and disposed to control said resistor means in such manner that at the time of low revolution of said pulse motor said resistor means may be short-circuited.
Claim 3
Dependent Claim
36 words
A pulse motor driving apparatus according to claim 1, wherein said rectifying means comprises a diode which makes the back electromotive force generated in said pulse motor winding conducted and said control means comprises a transistor.
Claim 4
Dependent Claim
37 words
A pulse motor driving apparatus according to claim 1, wherein said rectifying means comprises a diode which makes the back electromotive force generated in said pulse motor winding conducted and said control means comprises a lead switch.
Claim 5
Dependent Claim
79 words
A pulse motor drivnig apparatus comprising: at least one resistor means having an electric resistance connected in series with windings of a pulse motor and with a plural number of rectifying means having rectification characteristics to form closed circuits and at least one control means connected in parallel with said resistor means and disposed to control said resistor means in such manner that at the time of low revolution of said pulse motor said resistor means may be short-circuited.
Claim 6
Dependent Claim
79 words
A pulse motor drivnig apparatus comprising: at least one resistor means having an electric resistance connected in series with windings of a pulse motor and with a plural number of rectifying means having rectification characteristics to form closed circuits and at least one control means connected in parallel with said resistor means and disposed to control said resistor means in such manner that at the time of low revolution of said pulse motor said resistor means may be short-circuited.
Claim 7
Dependent Claim
46 words
A pulse motor driving apparatus according to claim 4, wherein said plural number of rectifying means comprise a plural number of diodes which make the electromotive force generated in said pulse motor windings conducted and said at least one control means comprises at least one transistor.
Claim 8
Dependent Claim
47 words
A pulse motor driving apparatus according to claim 4, wherein said plural number of rectifying means comprise a plural number of diodes which make the electromotive force generated in said pulse motor windings conducted and said at least one control means comprises at least one lead switch.
Claim 9
Dependent Claim
84 words
A pulse motor driving apparatus comprising: a plurality of electric elements which are connected in series with each other; a winding of a pulse motor connected in parallel with said electric elements; current control means connected in parallel with one of said electric elements and disposed to control the amount of current flow in at least two different states by a back electromotive force generated in said pulse motor winding; and switching means for controlling the supply of current to said pulse motor winding.
Claim 10
Dependent Claim
84 words
A pulse motor driving apparatus comprising: a plurality of electric elements which are connected in series with each other; a winding of a pulse motor connected in parallel with said electric elements; current control means connected in parallel with one of said electric elements and disposed to control the amount of current flow in at least two different states by a back electromotive force generated in said pulse motor winding; and switching means for controlling the supply of current to said pulse motor winding.
Claim 11
Dependent Claim
19 words
A pulse motor driving apparatus according to claim 7, wherein said current control means comprises a transistor or transistors.
Claim 12
Dependent Claim
48 words
A pulse motor driving apparatus according to claim 7 or 8, wherein said electric elements comprise an arrangement of recitifying means having a rectification characteristic, and resistor means having an electric resistance connected to said rectifying means in series and connected in parallel with said current control means.
Claim 13
Dependent Claim
35 words
A pulse motor driving apparatus according to claim 9, wherein said recitfying means comprises a diode connected in such direction in which the back electromotive force generated in the pulse motor winding may be transmitted.
Claim 14
Dependent Claim
82 words
A pulse motor driving apparatus comprising a plurality of transistors connected in parallel with the windings of a pulse motor respectively, said transistors comprising means for controlling the amount of current flow in at least two different states of said transistors by a back electromotive force generated in said pulse motor windings, the respective base terminals of said transistors being connected in common; and a plural number of switching means for controlling the supply of current to said pulse motor windings respectively.
Claim 15
Dependent Claim
82 words
A pulse motor driving apparatus comprising a plurality of transistors connected in parallel with the windings of a pulse motor respectively, said transistors comprising means for controlling the amount of current flow in at least two different states of said transistors by a back electromotive force generated in said pulse motor windings, the respective base terminals of said transistors being connected in common; and a plural number of switching means for controlling the supply of current to said pulse motor windings respectively.
Claim 16
Dependent Claim
67 words
A pulse motor driving apparatus for a pulse motor having a plurality of windings, comprising: a plurality of groups of transistors, the transistors in each group being connected in series with each other, and each said group of transistors being associated with a different one of said plurality of windings, and each said winding being connected in parallel with one of the transistors of its associated group.
Claim 17
Dependent Claim
67 words
A pulse motor driving apparatus for a pulse motor having a plurality of windings, comprising: a plurality of groups of transistors, the transistors in each group being connected in series with each other, and each said group of transistors being associated with a different one of said plurality of windings, and each said winding being connected in parallel with one of the transistors of its associated group.
Claim 18
Dependent Claim
110 words
A pulse motor driving apparatus comprising: at least one resistor means having an electric resistance; a plural number of rectifying means having a rectification characteristic, each of which is connected in series with said resistor means; a plurality of pulse motor windings each of which is connected across the associated rectifying means and said resistor means; at least one transistor connected in parallel with said resistor means for controlling the amount of current flow in at least two different states by a back electromotive force generated in said pulse motor windings; and a plural number of switching means for controlling the supply of current to said pulse motor windings, respectively.
Claim 19
Dependent Claim
110 words
A pulse motor driving apparatus comprising: at least one resistor means having an electric resistance; a plural number of rectifying means having a rectification characteristic, each of which is connected in series with said resistor means; a plurality of pulse motor windings each of which is connected across the associated rectifying means and said resistor means; at least one transistor connected in parallel with said resistor means for controlling the amount of current flow in at least two different states by a back electromotive force generated in said pulse motor windings; and a plural number of switching means for controlling the supply of current to said pulse motor windings, respectively.
Claim 20
Dependent Claim
41 words
A pulse motor driving apparatus according to claim 13, wherein said plural number of rectifying means comprise a plural numer of diodes connected in such a direction that the back electromotive force generated in said pulse motor windings may be transmitted.
Claim 21
Dependent Claim
98 words
A pulse motor driving apparatus comprising: current control means connected in parallel with the winding of a pulse motor and disposed to control the amount of current flow in at least two different states by a back electromotive force generated in said pulse motor winding, said current control means comprising an arrangement of rectifying means having a rectification characteristic, resistor means having an electric resistance connected to said rectifying means in series and at least one transistor connected in parallel with said resistor means, and switching means for controlling the supply of current to said pulse motor winding.
Claim 22
Dependent Claim
98 words
A pulse motor driving apparatus comprising: current control means connected in parallel with the winding of a pulse motor and disposed to control the amount of current flow in at least two different states by a back electromotive force generated in said pulse motor winding, said current control means comprising an arrangement of rectifying means having a rectification characteristic, resistor means having an electric resistance connected to said rectifying means in series and at least one transistor connected in parallel with said resistor means, and switching means for controlling the supply of current to said pulse motor winding.
Claim 23
Dependent Claim
35 words
A pulse motor driving apparatus according to claim 15, wherein said rectifying means comprises a diode connected in such direction in which the back electromotive force generated in the pulse motor winding may be transmitted.
Claim 24
Dependent Claim
90 words
A pulse motor driving apparatus comprising: at least one current control means comprising a plural number of transistors which have, at the side of the base thereof, a terminal common to all, said control means being connected parallel with the windings of a pulse motor respectively and disposed to control the amount of current flow in at least two different states via back electromotive force generated in said pulse motor windings, and a plural number of switching means for controlling the supply of current to said pulse motor windings, respectively.
Claim 25
Dependent Claim
90 words
A pulse motor driving apparatus comprising: at least one current control means comprising a plural number of transistors which have, at the side of the base thereof, a terminal common to all, said control means being connected parallel with the windings of a pulse motor respectively and disposed to control the amount of current flow in at least two different states via back electromotive force generated in said pulse motor windings, and a plural number of switching means for controlling the supply of current to said pulse motor windings, respectively.
Claim 26
Dependent Claim
113 words
A pulse motor driving apparatus comprising: at least one current control means comprising an arrangement of a plural number of rectifying means each having a rectification characteristic, at least one resistor means having an electric resistance connected with said rectifying means in series and at least one transistor connected in parallel with said resistor means, said control means being connected parallel with the windings of a pulse motor respectively and disposed to control the amount of current flow in at least two different states via back electromotive force generated in said pulse motor windings, and a plural number of switching means for controlling the supply of current to said pulse motor windings, respectively.
Claim 27
Dependent Claim
113 words
A pulse motor driving apparatus comprising: at least one current control means comprising an arrangement of a plural number of rectifying means each having a rectification characteristic, at least one resistor means having an electric resistance connected with said rectifying means in series and at least one transistor connected in parallel with said resistor means, said control means being connected parallel with the windings of a pulse motor respectively and disposed to control the amount of current flow in at least two different states via back electromotive force generated in said pulse motor windings, and a plural number of switching means for controlling the supply of current to said pulse motor windings, respectively.
Claim 28
Dependent Claim
41 words
A pulse motor driving apparatus according to claim 18, wherein said plural number of rectifying means comprise a plural number of diodes connected in such direction in which the back electromotive force generated in said pulse motor windings may be transmitted.
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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) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |