US4675584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: Toshiba Corp
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Filing: 1985-05-29
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Granted: 1987-06-23
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Expires: 2005-05-29
Abstract
Abstract A control system capable of improving a disturbance response characteristic, includes a control processing unit and a power converter. The control processing unit includes apparatus for (a) providing a signal A equal to a predetermined transfer function G X (s) of a detected value of a controlled variable n, (b) providing a signal B equal to a transfer function [1+G X (s)·G LH (s)] of a first command value, and (c) providing, as a second command value, a difference T* between said A and B signals, where G LH (s) is a simulated transfer function which is from T* to n. The power converter controls the controlled variable according to the second command value.
Inventors
- 👤 Ryoichi Kurosawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:03
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/281; H02P7/2815; B; B66; B66B; B66B1/00; B66B1/24; B66B1/28; B66B1/30; H02P7/285; H02P7/2855; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/902; Y10S388/923; Y10S388/93
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
A control system, comprising: detector means for detecting a value n of a controlled variable; means for producing a reference value; control amplifier means, connected to receive said detected value n and said reference value, for producing a first command value for reducing a difference between the detected value and said reference value; control processing means, connected to receive said detected value n and said first command value for producing a second command value, said control processing means including means (a) providing a signal A equal to a predetermined transfer function G X (s) of said detected value n, (b) providing a signal B equal to a transfer function (1+G X (s)·G LH (s)) of said first command value, and (c) providing, as said second command value, a difference T* between said A and B signals; and power converter means for controlling said controlled variable according to said second command value, where G LH (s) is a simulated transfer function which is from T* to n.
Claim 2
Dependent Claim
166 words
A control system, comprising: detector means for detecting a value n of a controlled variable; means for producing a reference value; control amplifier means, connected to receive said detected value n and said reference value, for producing a first command value for reducing a difference between the detected value and said reference value; control processing means, connected to receive said detected value n and said first command value for producing a second command value, said control processing means including means (a) providing a signal A equal to a predetermined transfer function G X (s) of said detected value n, (b) providing a signal B equal to a transfer function (1+G X (s)·G LH (s)) of said first command value, and (c) providing, as said second command value, a difference T* between said A and B signals; and power converter means for controlling said controlled variable according to said second command value, where G LH (s) is a simulated transfer function which is from T* to n.
Claim 3
Dependent Claim
179 words
A motor speed control system, comprising: speed detector means for detecting the speed of a motor and providing a detected speed value corresponding thereto; means for producing a reference speed value; speed control amplifier means, connected to receive said detected speed value and said reference speed value, for producing a first command value for reducing a difference between the detected speed value and said reference speed value; control processing means, connected to receive said detected speed value and said first command value, for producing a second command value, said control processing means including means (a) for providing a signal A equal to a predetermined transfer function G X (s) of said detected value, (b) providing a signal B equal to a (1+G X (s)·G LH (s)) of said first command value, and (c) providing, as said second command value, a difference T* between A and B signals; and power converter means for controlling said speed of the motor according to said second command value, where G LH (s) is a simulated transfer function which is from T* to n.
Claim 4
Dependent Claim
179 words
A motor speed control system, comprising: speed detector means for detecting the speed of a motor and providing a detected speed value corresponding thereto; means for producing a reference speed value; speed control amplifier means, connected to receive said detected speed value and said reference speed value, for producing a first command value for reducing a difference between the detected speed value and said reference speed value; control processing means, connected to receive said detected speed value and said first command value, for producing a second command value, said control processing means including means (a) for providing a signal A equal to a predetermined transfer function G X (s) of said detected value, (b) providing a signal B equal to a (1+G X (s)·G LH (s)) of said first command value, and (c) providing, as said second command value, a difference T* between A and B signals; and power converter means for controlling said speed of the motor according to said second command value, where G LH (s) is a simulated transfer function which is from T* to n.
Claim 5
Dependent Claim
36 words
A control system according to claim 1, wherein said predetermined transfer function G X (s) is a transfer function that can be expressed by ##EQU9## where G LA and G LC are defined as predetermined coefficients.
Claim 6
Dependent Claim
27 words
A motor speed control system according to claim 2, wherein said predetermined transfer function G X (s) is a transfer function that can be expressed by ##EQU10##
Claim 7
Dependent Claim
16 words
A motor speed control system according to claim 2, wherein said motor is an AC motor.
Claim 8
Dependent Claim
16 words
A motor speed control system according to claim 2, wherein said motor is a DC 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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |