US3808482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor with speed control circuit
Assignee: Agfa Gevaert AG
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Filing: 1972-05-30
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Granted: 1974-04-30
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Expires: 1992-05-30
Abstract
Abstract A regulating arrangement comprises a subtracting amplifier having an output and two inputs, and producing at the output a voltage equal to a first factor times the voltage at one of the inputs minus a second factor times the voltage at the other of the inputs. A motor circuit is connected across the output of the subtracting amplifier. The motor circuit includes a motor connected with an impedance. The impedance is connected with the motor and with the output of the subtracting amplifier and enforces a voltage drop across the motor of magnitude differing from the voltage magnitude across the amplifier output by at least the magnitude of the voltage drop across the impedance. The voltage drop across the motor increases in magnitude as the motor current supplying energy to the motor decreases. Accordingly, the voltage drop across the motor tends to increase as the motor speed increases. A command unit applies to one of the inputs of the subtracting amplifier a voltage effecting desired motion of the motor. A feedback arrangement, connected with the motor and with the other input of the amplifier, applies to the latter at least part of the voltage drop across the motor.
Inventors
- 👤 E Wagensonner
- 👤 V Stenzenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:21
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/288; H02P7/2885; G; G03; G03B; G03B17/00; G03B17/02; G03B17/12; G03B17/14; G03B19/00; G03B19/18; G03B7/00; G03B7/08; G03B7/081; G03B7/085; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/91
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
215 words
A regulating arrangement comprising, in combination, subtracting amplifier means, having two inputs and an output, and operative for producing at said output a voltage equal to a first factor times the voltage at one of said inputs minus a second factor times the voltage at the other of said inputs; a motor circuit connected across said output of said subtracting amplifier means and comprising a motor having two motor terminals and also comprising impedance means including resistance means connected to one of said motor terminals in series with said motor and also connected to said output of said subtracting amplifier means, said impedance means being operative for carrying at least part of the motor current and enforcing across said motor terminals a voltage drop whose magnitude differs from the voltage drop across said output by at least the magnitude of the voltage drop across said impedance means and which increases in magnitude with decreasing motor current and accordingly with increasing motor speed; command means for applying to one of said inputs a voltage effecting desired motion of said motor; and feedback means connected to said one of said motor terminals and to the other of said inputs and operative for applying to the latter at least part of the voltage drop across said motor terminals.
Claim 2
Dependent Claim
215 words
A regulating arrangement comprising, in combination, subtracting amplifier means, having two inputs and an output, and operative for producing at said output a voltage equal to a first factor times the voltage at one of said inputs minus a second factor times the voltage at the other of said inputs; a motor circuit connected across said output of said subtracting amplifier means and comprising a motor having two motor terminals and also comprising impedance means including resistance means connected to one of said motor terminals in series with said motor and also connected to said output of said subtracting amplifier means, said impedance means being operative for carrying at least part of the motor current and enforcing across said motor terminals a voltage drop whose magnitude differs from the voltage drop across said output by at least the magnitude of the voltage drop across said impedance means and which increases in magnitude with decreasing motor current and accordingly with increasing motor speed; command means for applying to one of said inputs a voltage effecting desired motion of said motor; and feedback means connected to said one of said motor terminals and to the other of said inputs and operative for applying to the latter at least part of the voltage drop across said motor terminals.
Claim 3
Dependent Claim
25 words
An arrangement as defined in claim 1, wherein said substracting amplifier means comprises a differential amplifier, and wherein said first and second factors are equal.
Claim 4
Dependent Claim
15 words
An arrangement as defined in claim 4, wherein said differential amplifier comprises an operational amplifier.
Claim 5
Dependent Claim
14 words
An arrangement as defined in claim 1, wherein said motor is a rotary motor.
Claim 6
Dependent Claim
22 words
An arrangement as defined in claim 1, wherein said motor is a D.C. motor capable of unlimited rotation in a single direction.
Claim 7
Dependent Claim
14 words
An arrangement as defined in claim 1, wherein said motor comprises a galvanometer movement.
Claim 8
Dependent Claim
29 words
An arrangement as defined in claim 1, wherein the voltage applied to said one of said inputs by said command means is influenced by the voltage across said motor.
Claim 9
Dependent Claim
49 words
A regulating arrangement as defined in claim 1, wherein said feedback means includes feedback resistor means connected to said one of said motor terminals and to the other of said inputs and operative for applying to the latter at least part of the voltage drop across said motor terminals.
Claim 10
Dependent Claim
170 words
A regulating arrangement cOmprising, in combination, subtracting amplifier means comprising a differential amplifier having an inverting input, a non-inverting input and an output, and operative for producing at said output a voltage proportional to the difference between the voltages at said inverting and non-inverting inputs; a motor circuit connected across said output of said differential amplifier and comprising a motor, and impedance means connected with said motor and with said output for carrying at least part of the motor current and for enforcing a voltage drop across said motor of magnitude differing from the voltage magnitude across said output by at least the magnitude of the voltage drop across said impedance means and which increases in magnitude with decreasing motor current and accordingly with increasing motor speed; command means for applying to said non-inverting input a voltage effecting desired motion of said motor; and feedback means, connected to said motor and to said inverting input, for applying to the latter at least part of the voltage drop across said motor.
Claim 11
Dependent Claim
170 words
A regulating arrangement cOmprising, in combination, subtracting amplifier means comprising a differential amplifier having an inverting input, a non-inverting input and an output, and operative for producing at said output a voltage proportional to the difference between the voltages at said inverting and non-inverting inputs; a motor circuit connected across said output of said differential amplifier and comprising a motor, and impedance means connected with said motor and with said output for carrying at least part of the motor current and for enforcing a voltage drop across said motor of magnitude differing from the voltage magnitude across said output by at least the magnitude of the voltage drop across said impedance means and which increases in magnitude with decreasing motor current and accordingly with increasing motor speed; command means for applying to said non-inverting input a voltage effecting desired motion of said motor; and feedback means, connected to said motor and to said inverting input, for applying to the latter at least part of the voltage drop across said motor.
Claim 12
Dependent Claim
18 words
An arrangement as defined in claim 9, wherein said impedance means is connected in series with said motor.
Claim 13
Dependent Claim
14 words
An arrangement as defined in claim 2, wherein said impedance means comprises resistance means.
Claim 14
Dependent Claim
29 words
An arrangement as defined in claim 11, wherein said motor circuit comprises a power amplifier stage connected with said motor and with said output of said subtracting amplifier means.
Claim 15
Dependent Claim
17 words
An arrangement as defined in claim 12, wherein said power amplifier stage comprises a push-pull power amplifier.
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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |