US4634948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping motor winding for bipolar drive
Assignee: PacSci Motion Control Inc
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Filing: 1985-05-17
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Granted: 1987-01-06
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Expires: 2005-05-17
Abstract
Abstract A stator for a stepping motor, the stator having a plurality of salient poles and at least two windings, each winding comprising at least two conductors each of which is wound upon one or more separate poles. The conductors of each winding may be connected either in series or in parallel. This winding arrangement is particularly advantageous when the conductors of each winding are connected in series and driven with a bipolar drive, as problems which exist with bifilar windings, such as high conductor-to-conductor potentials and inductive spikes, are avoided.
Inventors
- 👤 Robert N. Brigham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:46
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/14; H02K; H02K37/00; H02K37/02; H02K37/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
50 words
A stator for a stepping motor, comprising: (a) a plurality of salient poles; and (b) at least two windings, each winding comprising at least two conductors each of which is wound upon at least one pole associated with that conductor only, the conductors within each winding being connected in series.
Claim 2
Dependent Claim
50 words
A stator for a stepping motor, comprising: (a) a plurality of salient poles; and (b) at least two windings, each winding comprising at least two conductors each of which is wound upon at least one pole associated with that conductor only, the conductors within each winding being connected in series.
Claim 3
Dependent Claim
50 words
A stator for a stepping motor, comprising: (a) a plurality of salient poles; and (b) at least two windings, each winding comprising at least two conductors each of which is wound upon at least one pole associated with that conductor only, the conductors within each winding being connected in parallel.
Claim 4
Dependent Claim
50 words
A stator for a stepping motor, comprising: (a) a plurality of salient poles; and (b) at least two windings, each winding comprising at least two conductors each of which is wound upon at least one pole associated with that conductor only, the conductors within each winding being connected in parallel.
Claim 5
Dependent Claim
133 words
A stepping motor, comprising: (a) a stator having a plurality of salient poles; (b) at least two windings, each winding comprising two conductors each of which is wound upon at least one pole associated with that conductor only, the conductors within each winding being connected in series; (c) means for passing an electric current through each winding in one direction to produce one magnetic polarization of the pole(s) upon which the winding is wound and for passing an electric current through the winding in the opposite direction to produce the opposite magnetic polarization of the pole(s) upon which the winding is wound; and (d) a moving member having means which magnetically interact with the poles; whereby, successive changes in polarization of the windings cause incremental changes in the position of the moving member.
Claim 6
Dependent Claim
133 words
A stepping motor, comprising: (a) a stator having a plurality of salient poles; (b) at least two windings, each winding comprising two conductors each of which is wound upon at least one pole associated with that conductor only, the conductors within each winding being connected in series; (c) means for passing an electric current through each winding in one direction to produce one magnetic polarization of the pole(s) upon which the winding is wound and for passing an electric current through the winding in the opposite direction to produce the opposite magnetic polarization of the pole(s) upon which the winding is wound; and (d) a moving member having means which magnetically interact with the poles; whereby, successive changes in polarization of the windings cause incremental changes in the position of the moving member.
Claim 7
Dependent Claim
15 words
The invention, as defined in claim 3, wherein the motor is of the rotary type.
Claim 8
Dependent Claim
133 words
A stepping motor, comprising: (a) a stator having a plurality of salient poles; (b) at least two windings, each winding comprising two conductors each of which is wound upon at least two poles associated with that conductor only, the conductors within each winding being connected in parallel; (c) means for passing an electric current through each winding in one direction to produce one magnetic polarization of the pole(s) upon which the winding is wound and for passing an electric current through the winding in the opposite direction to produce the opposite magnetic polarization of the pole(s) upon which the winding is wound; and (d) a moving member having means which magnetically interact with the poles; whereby, successive changes in polarization of the windings cause incremental changes in the position of the moving member.
Claim 9
Dependent Claim
133 words
A stepping motor, comprising: (a) a stator having a plurality of salient poles; (b) at least two windings, each winding comprising two conductors each of which is wound upon at least two poles associated with that conductor only, the conductors within each winding being connected in parallel; (c) means for passing an electric current through each winding in one direction to produce one magnetic polarization of the pole(s) upon which the winding is wound and for passing an electric current through the winding in the opposite direction to produce the opposite magnetic polarization of the pole(s) upon which the winding is wound; and (d) a moving member having means which magnetically interact with the poles; whereby, successive changes in polarization of the windings cause incremental changes in the position of the moving member.
Claim 10
Dependent Claim
15 words
The invention, as defined in claim 5, wherein the motor is of the rotary type.
Claim 11
Dependent Claim
152 words
A stepping motor system, comprising: (a) a stepping motor with a stator having a plurality of salient poles, with at least two windings, each winding comprising two conductors each of which is wound upon at least two poles associated with that conductor only, and with a moving member having means which magnetically interact with the poles; and (b) a bipolar drive connected to the windings, such that the conductors in each winding may be energized either in series or in parallel, for passing an electric current through each winding in one direction to produce one magnetic polarization of the pole(s) upon which the winding is wound and for passing an electric current through the winding in the opposite direction to produce the opposite magnetic polarization of the pole(s) upon which the winding is wound; whereby, successive changes in polarization of the windings cause incremental changes in the position of the moving member.
Claim 12
Dependent Claim
152 words
A stepping motor system, comprising: (a) a stepping motor with a stator having a plurality of salient poles, with at least two windings, each winding comprising two conductors each of which is wound upon at least two poles associated with that conductor only, and with a moving member having means which magnetically interact with the poles; and (b) a bipolar drive connected to the windings, such that the conductors in each winding may be energized either in series or in parallel, for passing an electric current through each winding in one direction to produce one magnetic polarization of the pole(s) upon which the winding is wound and for passing an electric current through the winding in the opposite direction to produce the opposite magnetic polarization of the pole(s) upon which the winding is wound; whereby, successive changes in polarization of the windings cause incremental changes in the position of the moving member.
Claim 13
Dependent Claim
15 words
The invention, as defined in claim 7, wherein the motor is of the rotary type.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |