JPS55145803A - Flow or pressure controller for hydraulic circuit - Google Patents
Flow or pressure controller for hydraulic circuitInfo
- Publication number
- JPS55145803A JPS55145803A JP5457679A JP5457679A JPS55145803A JP S55145803 A JPS55145803 A JP S55145803A JP 5457679 A JP5457679 A JP 5457679A JP 5457679 A JP5457679 A JP 5457679A JP S55145803 A JPS55145803 A JP S55145803A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- modifying
- valve
- magnet valve
- control magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Servomotors (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To enable closed loop control of flow or pressure by a hydraulic system which eliminates the necessity of strict control of working oil against contamination and which prevents rapid responsiveness by providing a proportional flow control magnet valve or a proportional pressure control magnet valve with a detector for detecting the position of a valve body of the valve.
CONSTITUTION: A calculated deviation signal 7 is added to a control signal 8 which is to be transmitted from a speed signal setter 5 to a proportional flow control magnet valve 3, thereby forming a modifying signal 9. A signal converter 10 converts the modifying signal 9 into a level of a valve body position signal, that is, the modifying signal 9 is converted into a conversion signal 11 by the signal converter 10. A comparator arithmetic circuit 12 compares a detection signal from a valve body position detector 4 of the proportional flow control magnet valve 3 with the conversion signal 11 to calculate a deviation between the two. The calculated deviation signal 13 is added to the conversion signal 11 to thus form a modifying signal 14 which is now converted by a further signal converter 15 into a signal level which is to be applied to a coil of the proportional flow control magnet valve 3. A finally necessitated feedback loop is the stage at which a deviation signal 7 is added to a control signal 8 to form a modifying signal.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5457679A JPS55145803A (en) | 1979-05-02 | 1979-05-02 | Flow or pressure controller for hydraulic circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5457679A JPS55145803A (en) | 1979-05-02 | 1979-05-02 | Flow or pressure controller for hydraulic circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55145803A true JPS55145803A (en) | 1980-11-13 |
Family
ID=12974516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5457679A Pending JPS55145803A (en) | 1979-05-02 | 1979-05-02 | Flow or pressure controller for hydraulic circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55145803A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102878125A (en) * | 2012-09-30 | 2013-01-16 | 徐州大亚自动装备有限公司 | Closed-loop control system of hydraulic window opener |
-
1979
- 1979-05-02 JP JP5457679A patent/JPS55145803A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102878125A (en) * | 2012-09-30 | 2013-01-16 | 徐州大亚自动装备有限公司 | Closed-loop control system of hydraulic window opener |
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