US3969660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative motor control with improved circuit means
Assignee: Allen Bradley Co LLC
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Filing: 1974-08-02
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Granted: 1976-07-13
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Expires: 1994-08-02
Abstract
Abstract A regenerative motor control of the field reversing type includes a field circuit for energizing the motor field and an armature circuit for energizing the motor armature. An analog signal generating means, typically a multiplier, is coupled to the armature circuit and is operable by a bi-polarity motor operative condition error signal and a bi-polarity field current direction and magnitude signal for energizing the motor armature and for providing deenergization, as well as improved reenergization of the armature, during the transient period between motoring and regenerative operation.
Inventors
- 👤 Arnold Ruppert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:58
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/281; H02P7/2815; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
353 words
A regenerative motor control for regulating the operative condition of a direct current motor from a power source between the motoring and regenerative states in accordance with a bi-polarity operative condition error signal produced by a motor operative condition error signal source, said control comprising: a field circuit means having an input couplable to said error signal source and an output connectable to the field winding of the motor, said field circuit means being responsive to said error signal for providing current energization in either direction from the power source through the motor field winding and for reversing the current energization from a first direction through zero to a second direction during a transient period initiated by a reversal of the polarity of the error signal; signal means connected to said field circuit means for providing a signal proportional in magnitude to the magnitude of the motor field winding current energization and having a polarity indicative of the direction of said energization; an armature circuit means having an output connectable to the armature winding of the motor for energizing the armature winding from the power source responsive to the magnitude of a controlling signal of a preselected polarity applied to an input thereof, the energization of the armature winding providing motoring operation to the motor for one direction of field winding current energization and providing regenerative operation to the motor, for the motoring direction of motor rotation, for the other direction of field winding current energization; and analog signal generating means mathematically combining the magnitude and polarity characteristics of input signals applied to at least a pair of inputs for determining the magnitude and polarity characteristics of a resultant output signal provided at an output of said means, one of said inputs being couplable to said error signal source, the other of said inputs being coupled to said signal means for receiving said field winding current energization signal, sid output being coupled to the input of said armature circuit means for providing a controlling signal to said armature circuit means having the preselected polarity during the motoring and regenerative states of the motor.
Claim 2
Dependent Claim
353 words
A regenerative motor control for regulating the operative condition of a direct current motor from a power source between the motoring and regenerative states in accordance with a bi-polarity operative condition error signal produced by a motor operative condition error signal source, said control comprising: a field circuit means having an input couplable to said error signal source and an output connectable to the field winding of the motor, said field circuit means being responsive to said error signal for providing current energization in either direction from the power source through the motor field winding and for reversing the current energization from a first direction through zero to a second direction during a transient period initiated by a reversal of the polarity of the error signal; signal means connected to said field circuit means for providing a signal proportional in magnitude to the magnitude of the motor field winding current energization and having a polarity indicative of the direction of said energization; an armature circuit means having an output connectable to the armature winding of the motor for energizing the armature winding from the power source responsive to the magnitude of a controlling signal of a preselected polarity applied to an input thereof, the energization of the armature winding providing motoring operation to the motor for one direction of field winding current energization and providing regenerative operation to the motor, for the motoring direction of motor rotation, for the other direction of field winding current energization; and analog signal generating means mathematically combining the magnitude and polarity characteristics of input signals applied to at least a pair of inputs for determining the magnitude and polarity characteristics of a resultant output signal provided at an output of said means, one of said inputs being couplable to said error signal source, the other of said inputs being coupled to said signal means for receiving said field winding current energization signal, sid output being coupled to the input of said armature circuit means for providing a controlling signal to said armature circuit means having the preselected polarity during the motoring and regenerative states of the motor.
Claim 3
Dependent Claim
78 words
The regenerative motor control according to claim 1 wherein the armature circuit means is further defined as responsive to the opposite polarity of the controlling signal for reducing the armature winding energization to zero and said analog signal generating means is further defined as means for providing a controlling signal to said armature circuit means having the opposite polarity during the interval in which the field winding current energization is decreasing from the first flow direction to zero.
Claim 4
Dependent Claim
37 words
The regenerative motor control according to claim 1 wherein said analog signal generating means is further defined as multiplier means for providing an output signal which is the product of input signals applied to the inputs thereof.
Claim 5
Dependent Claim
52 words
The regenerative motor control of claim 2 wherein said field signal circuit means is further defined as providing a bi-polarity signal and said multiplier means is further defined as algebraic multiplier means for providing an output signal at the output thereof which is the algebraic product of said pair of input signals.
Claim 6
Dependent Claim
38 words
The regenerative motor control according to claim 1 wherein said field circuit means is further defined as means for controlling the magnitude of the field winding current energization responsive to the magnitude of the operative condition error signal.
Claim 7
Dependent Claim
42 words
The regenerative motor control according to claim 5 wherein said field circuit means includes means for providing substantially constant field winding current energization responsive to the operative condition error signal. in at least a portion of the operating range of the motor.
Claim 8
Dependent Claim
25 words
The regenerative motor control according to claim 6 wherein said field circuit means includes saturable amplifying means for providing substantially constant field winding current energization.
Claim 9
Dependent Claim
50 words
The regenerative motor control according to claim 4 wherein said field circuit means includes saturable amplifying means for providing substantially constant field winding current energization responsive to the operative condition error signal, whereby the output signal of said multiplier outside said transient period is directly proportional to the error signal.
Claim 10
Dependent Claim
37 words
The regenerative motor control according to claim 5 wherein said field circuit means is further defined as means for controlling the magnitude of the field winding current energization in proportion to the magnitude of said error signal.
Claim 11
Dependent Claim
52 words
The regenerative motor control according to claim 4 wherein said control includes polarity establishing means and wherein said algebraic multiplier means is further defined as providing an output signal to said armature circuit means having the polarity to energize the armature winding when the multiplier input signals are of the same polarity.
Claim 12
Dependent Claim
50 words
The regenerative motor control according to claim 1 wherein said armature circuit means includes an armature current regulating circuit having an input receiving said analog signal generating means signal as a reference signal and means providing an armature current feedback signal to the input of said armature current regulating circuit.
Claim 13
Dependent Claim
55 words
The regenerative motor control according to claim 3 wherein said armature circuit means includes an armature current regulating circuit having an input coupled to the output of said multiplier for receiving the output signal as a reference signal and means providing an armature current feedback signal to the input of the armature current regulating circuit.
Claim 14
Dependent Claim
38 words
The regenerative motor control according to claim 1 including an input amplifier connectable to said error signal source and connected to the input of said field circuit means and to an input of said analog signal generating means.
Claim 15
Dependent Claim
41 words
The regenerative motor control according to claim 12 including means connectable to said error signal source and connected to the input of said field circuit means and to an input of said analog signal generating means for limiting said error signal.
Claim 16
Dependent Claim
20 words
The regenerative motor control according to claim 14 wherein said means for limiting said error signal comprises a saturable amplifier.
Claim 17
Dependent Claim
42 words
The regenerative motor control according to claim 14 wherein said field circuit means includes means for providing substantially constant field winding current energization responsive to the operative condition error signal in at least a portion of the operating range of the motor.
Claim 18
Dependent Claim
44 words
The regenerative motor control according to claim 1 wherein said operative condition error signal source is in the control and is operatively associated with the motor armature for generating an error signal corresponding to the error between desired and actual conditions in said motor.
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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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |