Patent US4647829A successfully refreshed from Google Patents.
US4647829A
Expired / Lapsed
US
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Means and method for stepping motor stabilization
Assignee: PacSci Motion Control Inc
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Filing: 1985-09-03
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Granted: 1987-03-03
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Expires: 2005-09-03
Abstract
Abstract A mid-range stabilization circuit for use in a multiphase stepping motor control system having motor current controllers responsive to first and second reference signal inputs, the current controllers providing a level of current to the motor phases proportional to the reference signals. The stabilization circuit includes means for measuring the levels of the reference signals and means for limiting the levels of the reference signals such that the motor current controllers can provide current chopping when the motor is operating at a mid-range velocity.
Inventors
- 👤 Irving J. Giguere
- 👤 Thomas R. Gianni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:16
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/12; H02P8/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
In a multiphase stepping motor control system having motor current controllers responsive to reference signal inputs, the current controllers providing a level of current to the motor phases proportional to the reference signals, a method of providing for mid-range velocity stability of the motor, comprising: (a) measuring the level of the reference signals; and (b) limiting the levels of the reference signals such that the current controllers can provide current chopping when the motor is operating at a mid-range velocity.
Claim 2
Dependent Claim
80 words
In a multiphase stepping motor control system having motor current controllers responsive to reference signal inputs, the current controllers providing a level of current to the motor phases proportional to the reference signals, a method of providing for mid-range velocity stability of the motor, comprising: (a) measuring the level of the reference signals; and (b) limiting the levels of the reference signals such that the current controllers can provide current chopping when the motor is operating at a mid-range velocity.
Claim 3
Dependent Claim
87 words
In a two-phase stepping motor control system having first and second motor current controllers responsive to first and second reference signal inputs, respectively, the current controllers providing a level of current to the motor phases proportional to the reference signals, a method of providing for mid-range velocity stability of the motor, comprising: (a) measuring the level of the reference signals; and (b) limiting the levels of the reference signals such that the current controllers can provide current chopping when the motor is operating at a mid-range velocity.
Claim 4
Dependent Claim
87 words
In a two-phase stepping motor control system having first and second motor current controllers responsive to first and second reference signal inputs, respectively, the current controllers providing a level of current to the motor phases proportional to the reference signals, a method of providing for mid-range velocity stability of the motor, comprising: (a) measuring the level of the reference signals; and (b) limiting the levels of the reference signals such that the current controllers can provide current chopping when the motor is operating at a mid-range velocity.
Claim 5
Dependent Claim
85 words
In a multiphase stepping motor control system having motor current controllers responsive to reference signal inputs, the current controllers providing a level of current to the motor phases proportional to the reference signals, a circuit for providing for mid-range velocity stability of the motor, comprising: (a) means for measuring the level of the reference signals; and (b) means for limiting the levels of the reference signals such that the motor current controllers can provide current chopping when the motor is operating at a mid-range velocity.
Claim 6
Dependent Claim
85 words
In a multiphase stepping motor control system having motor current controllers responsive to reference signal inputs, the current controllers providing a level of current to the motor phases proportional to the reference signals, a circuit for providing for mid-range velocity stability of the motor, comprising: (a) means for measuring the level of the reference signals; and (b) means for limiting the levels of the reference signals such that the motor current controllers can provide current chopping when the motor is operating at a mid-range velocity.
Claim 7
Dependent Claim
46 words
The circuit of claim 3, wherein the means for limiting the levels of the reference signals comprises a voltage clamping circuit which receives an input from the means for measuring the level of the reference signals and which is connected to act on the reference signals.
Claim 8
Dependent Claim
54 words
The circuit of claim 4, wherein the means for measuring the levels of the reference signals comprises: (a) a signal conditioner having one of the reference signals as an input; and (b) a frequency-to-voltage converter having the output of the signal conditioner as an input and providing an input to the voltage clamping circuit.
Claim 9
Dependent Claim
92 words
In a two-phase stepping motor control system having first and second motor current controllers responsive to first and second reference signal inputs, respectively, the current controllers providing a level of current to the motor phases proportional to the reference signals, a circuit for providing for mid-range velocity stability of the motor, comprising: (a) means for measuring the level of the reference signals; and (b) means for limiting the levels of the reference signals such that the motor current controllers can provide current chopping when the motor is operating at a mid-range velocity.
Claim 10
Dependent Claim
92 words
In a two-phase stepping motor control system having first and second motor current controllers responsive to first and second reference signal inputs, respectively, the current controllers providing a level of current to the motor phases proportional to the reference signals, a circuit for providing for mid-range velocity stability of the motor, comprising: (a) means for measuring the level of the reference signals; and (b) means for limiting the levels of the reference signals such that the motor current controllers can provide current chopping when the motor is operating at a mid-range velocity.
Claim 11
Dependent Claim
46 words
The circuit of claim 6, wherein the means for limiting the levels of the reference signals comprises a voltage clamping circuit which receives an input from the means for measuring the level of the reference signals and which is connected to act on the reference signals.
Claim 12
Dependent Claim
54 words
The circuit of claim 7, wherein the means for measuring the levels of the reference signals comprises: (a) a signal conditioner having one of the reference signals as an input; and (b) a frequency-to-voltage converter having the output of the signal conditioner as an input and providing an input to the voltage clamping circuit.
References Cited (Backward Citations)
US3885210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |