US4368412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microprocessor-controlled motor drive control system
Assignee: Japan Kinoko Research Center Foundation
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Filing: 1981-02-04
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Granted: 1983-01-11
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Expires: 2001-02-04
Abstract
Abstract A microprocessor-controlled drive control system for a motor includes a driver circuit for the motor, a signal input unit for receiving an input command signal representing a desired extent of angular displacement of the motor, a microcomputer having an input/output interface connected between the signal input unit and the driver circuit and a central processing unit (CPU) for producing a control command signal in accordance with the input command signal and applying the control command signal to the driver circuit, thereby providing from the latter a drive signal for the motor in accordance with the control command signal, an encoder for sensing an angular displacement of the motor brought about by the drive signal and producing a succession of pulses representing the angular displacement being sensed, logic-circuit means connected between the encoder and the interface for applying to the central processing unit a feed-back signal at least in part derived from the encoder output pulses to modify the control command signal and consequentially the drive signal, and an interrupt unit associated with the microcomputer for intermittently providing an interrupt signal to the central processing unit, thereby permitting the latter to execute the modification of the control command signal.
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:42
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/23; G05B19/231; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34215; G05B2219/41; G05B2219/41363
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
224 words
A drive control system for a motor, comprising: a driver circuit connected to the motor; a signal input unit for receiving an input command signal representing a desired extent of angular displacement of the motor and generating a train of pulses representing said command signal; a microcomputer having an input/output interface connected to said driver circuit, and a central processing unit for producing a control command signal and applying said control command signal to said driver circuit, thereby providing from the latter a drive signal for said motor in accordance with said control command signal; an encoder for sensing an angular displacement of said motor being achieved by said drive signal and producing a succession of pulses representing said angular displacement being sensed; logic-circuit means connected between said encoder and said interface and between said signal input unit and said interface, said logic circuit means including a differential counter receiving said pulses from said signal input output and said encoder for registering a differential count thereof and applying the differential count to said interface to produce the modification of said control command signal in accordance therewith and consequentially said drive signal; and an interrupt unit associated with said microcomputer for intermittently providing an interrupt signal to said central processing unit, thereby permitting the latter signal to execute said modification of the control command signal.
Claim 2
Dependent Claim
224 words
A drive control system for a motor, comprising: a driver circuit connected to the motor; a signal input unit for receiving an input command signal representing a desired extent of angular displacement of the motor and generating a train of pulses representing said command signal; a microcomputer having an input/output interface connected to said driver circuit, and a central processing unit for producing a control command signal and applying said control command signal to said driver circuit, thereby providing from the latter a drive signal for said motor in accordance with said control command signal; an encoder for sensing an angular displacement of said motor being achieved by said drive signal and producing a succession of pulses representing said angular displacement being sensed; logic-circuit means connected between said encoder and said interface and between said signal input unit and said interface, said logic circuit means including a differential counter receiving said pulses from said signal input output and said encoder for registering a differential count thereof and applying the differential count to said interface to produce the modification of said control command signal in accordance therewith and consequentially said drive signal; and an interrupt unit associated with said microcomputer for intermittently providing an interrupt signal to said central processing unit, thereby permitting the latter signal to execute said modification of the control command signal.
Claim 3
Dependent Claim
47 words
The system defined in claim 1 wherein said driver circuit is adapted to provide, as said drive signal, a series of drive pulses having an on-time and off-time at least one of which controlledly is varied by said modification of the control command signal in said microcomputer.
Claim 4
Dependent Claim
29 words
The system defined in claim 1 or claim 2 wherein said signal input unit is adapted to issue a succession of input command pulses defining said input command signal.
Claim 5
Dependent Claim
89 words
The system defined in claim 1 or claim 2 wherein said logic-circuit means includes a second differential counter responsive to said pulses of the encoder and to a reference signal in the form of a succession of reference pulses furnished from said central processing unit through said interface for providing an output signal representing a difference between said encoder pulses and said reference pulses, said output signal of said second differential counter being returned through said interface to said microprocessor to produce said modification of the control command signal.
Claim 6
Dependent Claim
225 words
A drive control system for a motor comprising: a driver circuit connected to the motor; a signal input unit for receiving an input command signal representing a desired extent of angular displacement of the motor and generating a train of pulses representing said command signal; a microcomputer having an input/output interface connected to said driver circuit, and a central processing unit for producing a control command signal and applying said control command signal to said driver circuit thereby providing from the latter a drive signal in accordance with said control command signal; an encoder for sensing an angular displacement of said motor being produced by said drive signal and generating a succession of pulses representing said angular displacement being sensed; and logic circuit means connected with said interface and including: a first differential counter connected with said encoder and said unit for receiving said pulses from said unit and said encoder and producing a first differential count thereof and applying said first differential count to said interface, and a second differential counter connected to said encoder and to said interface for receiving reference pulses from said microcomputer and said pulses from said encoder for producing a second differential count of the received pulses and applying said second differential count to said interface whereby said control command signal is modified in accordance with said differential counts.
Claim 7
Dependent Claim
225 words
A drive control system for a motor comprising: a driver circuit connected to the motor; a signal input unit for receiving an input command signal representing a desired extent of angular displacement of the motor and generating a train of pulses representing said command signal; a microcomputer having an input/output interface connected to said driver circuit, and a central processing unit for producing a control command signal and applying said control command signal to said driver circuit thereby providing from the latter a drive signal in accordance with said control command signal; an encoder for sensing an angular displacement of said motor being produced by said drive signal and generating a succession of pulses representing said angular displacement being sensed; and logic circuit means connected with said interface and including: a first differential counter connected with said encoder and said unit for receiving said pulses from said unit and said encoder and producing a first differential count thereof and applying said first differential count to said interface, and a second differential counter connected to said encoder and to said interface for receiving reference pulses from said microcomputer and said pulses from said encoder for producing a second differential count of the received pulses and applying said second differential count to said interface whereby said control command signal is modified in accordance with said differential counts.
Claim 8
Dependent Claim
113 words
A motor system comprising: a drive control system as defined in claim 1 or claim 5, and an electric motor, operated by said driver circuit, said electric motor comprising a leadscrew; an elongated nut threadedly engaged with said leadscrew and extending axially therealong; a sleeve surrounding said nut and defining therewith a fluid pressurizable compartment adapted to receive the fluid at a pressure coupling said sleeve with said nut; an armature winding on said sleeve; a cylindrical housing surrounding said sleeve and forming a stator cooperating with said armature winding; commutators on said sleeve within said housing electrically connected to said armature; and brushes spring mounted in said housing bearing upon said commutators.
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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) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |