GB2340915A - Proportional controller - Google Patents

Proportional controller Download PDF

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Publication number
GB2340915A
GB2340915A GB9818086A GB9818086A GB2340915A GB 2340915 A GB2340915 A GB 2340915A GB 9818086 A GB9818086 A GB 9818086A GB 9818086 A GB9818086 A GB 9818086A GB 2340915 A GB2340915 A GB 2340915A
Authority
GB
United Kingdom
Prior art keywords
proportional controller
stepping motor
controller
proportional
input
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.)
Withdrawn
Application number
GB9818086A
Other versions
GB9818086D0 (en
Inventor
Hugh Patrick Alexander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9818086A priority Critical patent/GB2340915A/en
Publication of GB9818086D0 publication Critical patent/GB9818086D0/en
Publication of GB2340915A publication Critical patent/GB2340915A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Stepping Motors (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

A proportional controller comprises a stepping motor 1 (of <I>m</I> steps per revolution), a gear train, 2, (of ratio <I>x:y</I>), and an <I>n</I> turn needle valve 4. From these values the number of stepping motor steps required to fully open the valve (from being fully closed) can be determined and, using this value, an embedded micro-controller, or other suitable device, can be programmed to ensure that the needle valve will open or close a given amount proportional to any change in input.

Description

2340915 PROPORTIONAL CONTROLLER This invention relates to a proportional
controller.
Multi-turn actuated devices, such as needle valves and gas regulators are a well known class of devices which can be used in a number of different applications. However these devices cannot be controlled accurately enough to make them suitable for certain precision applications such as flow and pressure regulation.
According to the present invention there is provided a proportional controller comprising a stepping motor, a gear train and a multi-turn actuated device.
Two specific embodiments of the invention will now be described by way of the accompanying drawing in which: - Figure I shows the alignment of the stepping motor, the gear train and the multi-turn actuated device (in this case, a needle valve is shown).
Figure 2 illustrates, in a block diagram, the connections between the stepping motor and an embedded micro-controller.
Embodiment 1:
Referring to the drawing the proportional controller comprises a stepping motor 1 (of m steps per revolution), a gear train, 2, (of ratio x:y), and an 11 turn needle valve 4, The stepping motor is controlled by an embedded micro controller as illustrated in Figure 2 which has, as input, an analogue signal varying between values a and b.
From these values the number of stepping motor steps required to fully open the valve (from being fully closed) can be deten-nined using the following equation, Steps s = m n WY) The embedded micro-controller is programmed to convert the value of the analogue input into a digital value. Dependent on the digital resolution required, the analogue input is converted into a number of discrete steps d For example, 8 bit digital resolution would set d equal to 256, whereas with 12 bit digital resolution, d would be equal to 4096 steps The embedded micro-controller is then programmed to convert each increase of I digital input step into s1d stepping motor steps. This will ensure that the needle valve will open or close a given amount proportional to the change in analogue input.
Embodiment 2 Referring to the drawing the proportional controller comprises a stepping motor 1 (of m steps per revolution), a gear train, 2, (of ratio x:y), and an n turn gas regulator 4. The stepping motor is controlled by an embedded micro controller as illustrated in Figure 2 which has, as input, a digital signal from a suitable communications channel.
The number of stepping motor steps required to fully open the regulator (from being fully closed) is determined as for the valve in embodiment 1.
The embedded micro controller is programmed to accept known code sequences, sent via the communications channel, in order to advance (or retard) the stepping motor a specified number of steps.
3

Claims (8)

1 A proportional controller comprising a stepping motor, a gear train (of unspecified ratio) and a multi-turn actuated device.
2. A proportional controller as claimed in Claim 1 wherein the multi-turn actuated device is a needle valve.
3. A proportional controller as claimed in Claim 1 wherein the multi-turn actuated device is a gas flow regulator.
4. A proportional controller as claimed in Claim 1 wherein the multi-turn actuated device is a gas pressure regulator.
5. A proportional controller as claimed in any preceding claim wherein the stepping motor is controlled by an embedded micro-controller.
6. A proportional controller as claimed in Claim 5 wherein the embedded microcontroller is programmed to accept an analogue signal as input.
7. A proportional controller as claimed in Claim 5 wherein the embedded microcontroller is programmed to accept a digital signal as input.
8. A proportional controller as substantially described herein with reference to Figures 1 & 2 of the accompanying drawing.
GB9818086A 1998-08-20 1998-08-20 Proportional controller Withdrawn GB2340915A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9818086A GB2340915A (en) 1998-08-20 1998-08-20 Proportional controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9818086A GB2340915A (en) 1998-08-20 1998-08-20 Proportional controller

Publications (2)

Publication Number Publication Date
GB9818086D0 GB9818086D0 (en) 1998-10-14
GB2340915A true GB2340915A (en) 2000-03-01

Family

ID=10837519

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9818086A Withdrawn GB2340915A (en) 1998-08-20 1998-08-20 Proportional controller

Country Status (1)

Country Link
GB (1) GB2340915A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2245239A1 (en) * 2004-06-03 2005-12-16 Consejo Sup. Investig. Cientificas Servo-positioner for a micro-regulating valve
EP2354609A3 (en) * 2008-07-18 2011-11-02 Flowserve Management Company Variable speed actuator
US10094485B2 (en) 2008-07-18 2018-10-09 Flowserve Management Company Variable-speed actuator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6564220B1 (en) 1999-10-06 2003-05-13 Dell Usa, L.P. System and method for monitoring support activity
US6574615B1 (en) 1999-10-06 2003-06-03 Dell Usa, L.P. System and method for monitoring support activity

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941148A (en) * 1975-04-17 1976-03-02 Sun Oil Company Of Pennsylvania Control valve drive
EP0116734A1 (en) * 1983-02-15 1984-08-29 Fujikin International, Inc. Valve control device
US4850319A (en) * 1988-02-18 1989-07-25 Siemens-Bendix Automotive Electronics L.P. Electronic throttle actuator
EP0533546A1 (en) * 1991-09-16 1993-03-24 Labinal Improvements to exhaust gas recirculation devices
US5711507A (en) * 1994-09-30 1998-01-27 Gas Research Institute Automatic calibrating electrically controlled diaphragm valve actuators and methods for their calibration

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941148A (en) * 1975-04-17 1976-03-02 Sun Oil Company Of Pennsylvania Control valve drive
EP0116734A1 (en) * 1983-02-15 1984-08-29 Fujikin International, Inc. Valve control device
US4850319A (en) * 1988-02-18 1989-07-25 Siemens-Bendix Automotive Electronics L.P. Electronic throttle actuator
EP0533546A1 (en) * 1991-09-16 1993-03-24 Labinal Improvements to exhaust gas recirculation devices
US5711507A (en) * 1994-09-30 1998-01-27 Gas Research Institute Automatic calibrating electrically controlled diaphragm valve actuators and methods for their calibration

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PAJ abstract for JP63006201 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2245239A1 (en) * 2004-06-03 2005-12-16 Consejo Sup. Investig. Cientificas Servo-positioner for a micro-regulating valve
WO2006021603A1 (en) * 2004-06-03 2006-03-02 Consejo Superior De Investigaciones Científicas Servo-positioner for a micro-regulating valve
US8740181B2 (en) 2004-06-03 2014-06-03 Consejo Superior De Investigaciones Cientificas Servo-positioner for a micro-regulating valve
EP2354609A3 (en) * 2008-07-18 2011-11-02 Flowserve Management Company Variable speed actuator
US9188237B2 (en) 2008-07-18 2015-11-17 Flowserve Management Company Variable-speed actuator
US10094485B2 (en) 2008-07-18 2018-10-09 Flowserve Management Company Variable-speed actuator

Also Published As

Publication number Publication date
GB9818086D0 (en) 1998-10-14

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)