US3754183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for controlling an electric output with reduced recovery time
Assignee: Hitachi Ltd
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Filing: 1972-03-28
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Granted: 1973-08-21
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Expires: 1992-03-28
Abstract
Abstract In the control of an electric output with respect to a reference value, the gain of a control means is controlled or changed to a higher value when the difference between the prevailing value of the electric output and a reference value exceeds a predetermined value.
Inventors
- 👤 M Ibamoto
- 👤 H Kiwaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:54
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14; H02P9/26; H02P9/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A control system for controlling an electric output with a reduced recovery time comprising; generating means for generating said electric output, comparing means for comparing said electric output with a reference level to detect the difference therebetween and to provide an output in accordance with the difference, controlling means for controlling said generating means with a constant gain in accordance with the output of said comparing means when the output of said comparing means is not highEr than a predetermined level, a non-sensitive region element connected with said comparing means and said controlling means for increasing the gain of said controlling means only when the output of said comparing means exceeds said predetermined level, whereby said generating means is controlled by said controlling means with the increased gain when said electric output deviates from said reference level exceeding a predetermined value.
Claim 2
Dependent Claim
141 words
A control system for controlling an electric output with a reduced recovery time comprising; generating means for generating said electric output, comparing means for comparing said electric output with a reference level to detect the difference therebetween and to provide an output in accordance with the difference, controlling means for controlling said generating means with a constant gain in accordance with the output of said comparing means when the output of said comparing means is not highEr than a predetermined level, a non-sensitive region element connected with said comparing means and said controlling means for increasing the gain of said controlling means only when the output of said comparing means exceeds said predetermined level, whereby said generating means is controlled by said controlling means with the increased gain when said electric output deviates from said reference level exceeding a predetermined value.
Claim 3
Dependent Claim
116 words
A control system according to claim 1, wherein said controlling means includes at least two controlling units connected in parallel with each other, one of said controlling units producing an output for controlling said generating means when the output of said comparing means is not higher than said predetermined level, the other being connected to said non-sensitive region element, said non-sensitive region element producing an output to be applied to said other controlling unit when the output of said comparing means exceeds said predetermined level, said other controlling unit producing in response to said output of said non-sensitive region element an output for controlling said generating means together with said output of said one controlling unit.
Claim 4
Dependent Claim
85 words
A control system according to claim 1, wherein said controlling means includes switching means and at least two controlling units providing different gains connected in parallel with each other, and said non-sensitive region element produces an outut to be applied to said switching means when the output of said comparing means exceeds said predetermined level, said switching means switching said controlling units in response to the output of said non-sensitive region element from one providing a lower gain to the other providing a higher gain.
References Cited (Backward Citations)
US3582713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |