EP2246569A2 - Contrôleur de pompe - Google Patents
Contrôleur de pompe Download PDFInfo
- Publication number
- EP2246569A2 EP2246569A2 EP10160593A EP10160593A EP2246569A2 EP 2246569 A2 EP2246569 A2 EP 2246569A2 EP 10160593 A EP10160593 A EP 10160593A EP 10160593 A EP10160593 A EP 10160593A EP 2246569 A2 EP2246569 A2 EP 2246569A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- current
- voltage
- pressure
- control
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000012937 correction Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 4
- 230000003989 repetitive behavior Effects 0.000 abstract description 2
- 208000013406 repetitive behavior Diseases 0.000 abstract description 2
- 238000004422 calculation algorithm Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
- F04B2203/0201—Current
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
- F04B2203/0202—Voltage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/04—Motor parameters of linear electric motors
- F04B2203/0401—Current
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/04—Motor parameters of linear electric motors
- F04B2203/0402—Voltage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/04—Pressure in the outlet chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
Definitions
- the present invention relates to a technique for controlling the operation of a pump, including providing a method of controlling the operation of a pump at a constant pressure using motor current as a sensing parameter and motor voltage as a controlling parameter.
- the present invention relates to a method and apparatus using a pump control to keep an outlet pressure constant based at least partly on sensing motor current and a unique algorithm of tracking the V-I characteristics of a pump.
- Many pumps known in the art include a mechanical pressure switch, or semiconductor hall sensors, or load cells, or any other type of electronic pressure sensing device, that shuts off the pump when certain pressure (i.e., the shut-off pressure) is exceeded.
- the pressure switch, hall sensor or load cell is typically positioned in physical communication with the fluid in the pump. When the pressure of the fluid exceeds the shut-off pressure, the force of the fluid moves the mechanical switch to open the pump's power circuit or generates corresponding electrical signal to trace the set pressure.
- Mechanical switches have several limitations. For example, during the repeated opening and closing of the pump's power circuit, arcing and scorching often occurs between the contacts of the switch. The pressure cannot remain constant because of the non-repetitive and/or non-linear behavior. So relying totally on the pressure switch or sensor will always give an inconsistence control loop.
- a new technique is provided using current sensing to control the pressure at a constant level without the direct sensing of the pressure. This new technique will help to reduce the dependency solely on the pressure switch or sensor and their non linearity and other associated problems such as the non-repetitive behavior, as well as other known problems associated with being affected by electromagnetic interference (EMI), etc.
- EMI electromagnetic interference
- the present invention may take the form of apparatus, such as a pump controller, featuring one or more modules configured to respond to one or more input signals containing information about current provided from a pump; and also configured to provide one or more output signals containing information to control the pump to operate at a substantially constant pressure without the direct sensing of pump pressure.
- apparatus such as a pump controller, featuring one or more modules configured to respond to one or more input signals containing information about current provided from a pump; and also configured to provide one or more output signals containing information to control the pump to operate at a substantially constant pressure without the direct sensing of pump pressure.
- the one or more input signals may contain information about a sensed actual motor current to operate the pump, and the one or more output signals may contain information about a voltage read from the table that corresponds to the sensed actual motor current.
- the one or more input signals may also contain information about a comparison of the sensed actual motor current with a set current.
- the one or more modules may also be configured to provide a correction term to control the pump to operate at the substantially constant pressure.
- Either the one or more modules or the apparatus as a whole may be configured as a PID controller for controlling the operation of the pump.
- the apparatus may also take the form of a controller featuring one or more signal processing modules configured to respond to one or more input signals containing information about current provided from a pump; and configured to provide one or more output signals containing information to control the pump to operate at a substantially constant pressure without the direct sensing of pump pressure.
- Embodiments of the controller may include one or more of the features described herein.
- the controller may also form part of a pumping system or arrangement that includes the pump.
- the present invention may also take the form of a method featuring steps for controlling the pump, including responding to one or more input signals containing information about current provided from a pump; and providing one or more output signals containing information to control the pump to operate at a substantially constant pressure without the direct sensing of pump pressure.
- Embodiments of the method may include steps for implementing one or more of the features described herein.
- the present invention may also take the form of a computer program product having a computer readable medium with a computer executable code embedded therein for implementing the steps of the method when run on a signaling processing device that forms part of such a pump controller like element 10.
- the computer program product may take the form of a CD, a floppy disk, a memory stick, a memory card, as well as other types or kind of memory devices that may store such a computer executable code on such a computer readable medium either now known or later developed in the future.
- FIGs 1 a shows apparatus in the form of a pump controller generally indicated as 10 featuring one or more modules 12 and 14.
- the one or more modules 12 is configured to respond to one or more input signals containing information about current provided from a pump (see element 30 ( Figure 4 ); and also configured to provide one or more output signals containing information to control the pump 30 ( Figure 4 ) to operate at a substantially constant pressure without the direct sensing of pump pressure.
- the one or more input signals may contain information about a sensed actual motor current to operate the pump, and the one or more output signals may contain information about a voltage read from a calibration table that corresponds to the sensed actual motor current.
- the one or more input signals may also contain information about a comparison of the sensed actual motor current with a set current.
- the one or more modules 12 may also be configured to provide a correction term to control the pump to operate at the substantially constant pressure.
- Either the one or more modules 12 or the apparatus 10 as a whole may be configured as, or form part of, a module (see element 40 ( Figure 4 )) having a PID controller 41 along with other components or modules 42, 44, 46, 48 described below for controlling the operation of the pump 30.
- the module 40 includes, e..g., one or more signal processing modules configured to perform the signal processing for implementing the functionality of the present invention.
- the PID controller 40 may also form part of a pumping system or arrangement generally indicated as 50 in Figure 4 for controlling the operation of the pump 30.
- the one or more modules 14 may include other modules that may form part of the pump controller to implement other controller functionality that does not form part of the underlying invention, e.g., including input/output functionality for processing signaling to and from a pump/motor, a sensing device, etc., as well as functionality associated with other devices or components, e.g., including a random access memory (RAM) type device, a read only memory (ROM) type device, control and data bus type devices, etc.
- RAM random access memory
- ROM read only memory
- the calibration table may form part of, e.g., a memory storage device.
- the memory storage device itself may form part of the one or more modules 12, the one or more other modules 14, or some combination thereof.
- Memory storage devices are known in the art, and the scope of the invention is not intended to be limitation to any particular type or kind thereof either now known or later developed in the future.
- the present invention may also take the form of a method shown in Figure 1b having steps 22, 24 that form part of a flowchart generally indicated as 20 for controlling the pump 30 ( Figure 4 ), including responding to one or more input signals containing information about current provided from the pump 30, e.g. along signal path 42a ( Figure 4 ); and providing one or more output signals, e.g. along signal path 41 a ( Figure 4 ), containing information to control the pump 30 to operate at a substantially constant pressure without the direct sensing of pump pressure.
- Figure 2 is provided to show the general head-flow characteristics for a typical diaphragm pump. From the characteristics, the current and voltage are understood to be substantially unique for the head-flow desired. Another important outcome is that the pressure at the two different flow rates is understood not to substantially have the same voltage and current at any given time.
- Figure 3 is provided to show a V-I characteristic at a constant pressure for a typical diaphragm pump, which forms the basis for the table or table look-up technique according to the present invention.
- the V-I characteristics can be determined by varying the voltages applied to the pump for its entire operating range (e.g. from 8.5 V to 14.8V for +12V motor and without any control electronics, i.e. a variable speed drive (VSD)) and plotting the current by keeping the pressure constant which is the desired constant pressure at which the pump needs to be maintained when it is in its intended normal operation (e.g., 30 PSI).
- VSD variable speed drive
- V-I characteristics in Figure 3 that determine the table for a given pump are unique for that given pump since V-I characteristics substantially depend on the motor characteristics of that given pump, which typically vary from one motor when compared to another motor.
- respective V-I characteristics will be sensed and determined for each pump and a respective table will be formulated for each pump that are unique for each pump, and used to control each pump.
- any controller or control system may be implemented to control the pump at the constant pressure by looking up and following the above obtained trend line (V-I characteristics) using the table loop-up technique according to the present invention.
- Figure 4 shows a diagram of a control block for a pump system 50 having a simple yet effective approaches according to some embodiments of the present invention.
- the control block or module 40 includes devices, components or modules such as the PI(D) controller module 41, along with other components or modules 42, 44, 46, 48 for controlling the operation of the pump 30.
- the module 42 senses current from the motor along signal path 42a, and provides a current sensing signal along signal path 42b containing information about the sensed motor current.
- the module 44 is configured to respond to the current sensing signal along signal path 42b, to measure current at a motor voltage, and provide a measured current signal along signal path 44a containing information about the measured current at that motor voltage.
- the one or more input signals containing information about current provided from the pump 30 includes the current sensing signal along signal path 42b.
- the module 46 is configured to respond to a voltage output signal E along signal path 41 a provided from the PI(D) controller module 41 to the pump 30 along signal path 41 a for controlling the operation of the pump 30, to set current at a particular voltage (calibration), and provide a signal along signal path 46a containing information about the set current at the particular voltage (calibration).
- the node module 48 is configured to response to the signal along signal path 44a containing information about the measured current at the motor voltage and the signal along signal path 46a containing information about the set current at the particular voltage (calibration), and provide a signal e along signal path 48a to the PI(D) module 41 containing information about the two signals. Consistent with that described in further detail below, the signal e provided from the node module 48 to the PI(D) module 41 along signal path 48a contains information about an error between the set current and sensed actual motor current that will be used as input parameter for the PID controller 41.
- the PI(D) module 41 is configured to respond to one or more input signals, including the signal e along signal path 48a that contains information about current provided from the pump 30, as well as voltage output signal E along signal path 41 a provided from the PI(D) controller module 41 to the pump 30 along signal path 41 a for controlling the operation of the pump 30 the voltage signal E along signal path 41 a to the pump 30 along signal path 41 a for controlling the operation of the pump 30. Consistent with that described in further detail below, the voltage signal E from the PI(D) module 41 to the pump 30 along signal path 41 a will contain the correction term to the motor voltage to get the desire pressure.
- the one or more output signals containing information to control the pump 30 ( Figure 4 ) to operate at the substantially constant pressure without the direct sensing of pump pressure includes the voltage output signal E along signal path 41a.
- the voltage output signal E along signal path 41 a for controlling the operation of the pump 30 is effectively corrected or modified based at least partly on the control feedback system shown in Figure 4 that depends on a relationship between the sensed motor current and the information contained in the table calibrated for the respective pump 30 so as to operate the respective pump 30 at the substantially constant pressure without the direct sensing of pump pressure.
- the scope of the invention is not intended to be limited to the type or kind of signal path being used to exchange signal between the components or modules shown and described herein. Embodiments are envisioned using signal paths that are hard wired between the components or modules shown and described herein, or wireless communication couplings between the components or modules shown and described herein, or some combination thereof, as well as other types or kinds of signal paths either now known or later developed in the future.
- Figure 5 shows a graph of current in relation to voltage having V-I characteristics for desired current indicated as D (shown as having a lighter colored function) and achieved current indicated as A (shown as having a darker colored function) at a constant pressure without the direct sensing of pump pressure for controlling the operation of a diaphragm pump according to some embodiments of the present invention.
- the one or more modules 12 ( Figure 1 ) or 41 ( Figure 4 ) is configured to provide a correction term, e.g., in the form a modified voltage signal along signal path 41 a, to control the pump so as to operate at the substantially constant pressure, such that the desired current D and achieved current A have similar values at a similar motor voltage as shown in the graph Figure 5 for controlling the operation of a diaphragm pump without the direct sensing of pump pressure, according to some embodiments of the present invention.
- a correction term e.g., in the form a modified voltage signal along signal path 41 a
- This control implementation according to the present invention as described herein provides a highly accurate, seamless yet easy to implement control algorithm, which provides a piece-wise linear approach that is easy to calibrate (obtain the V-I characteristics) and has less computational burden on the controller.
- V-I curve The reproduction of the V-I curve is done using the piece-wise linear method.
- the curve is divided in number (ideally infinite) small linear lines.
- the pump will sense the actual motor current and apply the voltage to the motor. The same voltage will be sent to the set current prediction logic to get the set current for the desired pressure at the present motor voltage. The sensed actual motor current will be compared with the set current (desired current at that voltage for desired pressure - from the calibration table). The error between the set current and sensed actual motor current will be used as input parameter for the PID controller. The PID controller will generate the correction term to the motor voltage (controller by duty cycle) to get the desire pressure. Next time the above steps are repeated at a constant and very fast rate.
- the one or more output signals along signal path 41 a may be provided to get the output that gives the constant desired pressure at the pump's output through the predictive algorithm approach according to the present invention.
- the functionality of the modules 12, 41, 42, 44, 46 or 48 may be implemented using hardware, software, firmware, or a combination thereof.
- the modules 12, 41, 42, 44, 46 or 48 would include one or more microprocessor-based architectures having a microprocessor, a random access memory (RAM), a read only memory (ROM), input/output devices and control, data and address buses connecting the same.
- RAM random access memory
- ROM read only memory
- a person skilled in the art would be able to program such a microcontroller (or microprocessor)-based implementation to perform the functionality described herein without undue experimentation.
- the scope of the invention is not intended to be limited to any particular implementation using technology either now known or later developed in the future.
- VSD variable speed drive pump controller
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Measuring Fluid Pressure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17125409P | 2009-04-21 | 2009-04-21 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2246569A2 true EP2246569A2 (fr) | 2010-11-03 |
EP2246569A3 EP2246569A3 (fr) | 2011-06-22 |
EP2246569B1 EP2246569B1 (fr) | 2023-06-28 |
Family
ID=42313564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10160593.9A Active EP2246569B1 (fr) | 2009-04-21 | 2010-04-21 | Contrôleur de pompe |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2246569B1 (fr) |
JP (1) | JP5479995B2 (fr) |
CN (1) | CN101871447B (fr) |
AU (1) | AU2010201599B2 (fr) |
MX (1) | MX2010004368A (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110255992A1 (en) * | 2009-04-21 | 2011-10-20 | Derrick Thanh Tran | Pump controller |
WO2013086317A1 (fr) * | 2011-12-07 | 2013-06-13 | Flow Control Llc. | Pompe utilisant de l'électronique multitension et équipée d'une protection contre le fonctionnement à sec et la surintensité |
EP2615306A4 (fr) * | 2011-04-11 | 2015-07-08 | Fuji Electric Co Ltd | Dispositif de commande de pompe d'alimentation en eau |
US9745974B2 (en) | 2011-12-07 | 2017-08-29 | Flow Control LLC | Pump using multi voltage electronics with run dry and over current protection |
US9823627B2 (en) | 2012-12-12 | 2017-11-21 | S.A. Armstrong Limited | Self learning control system and method for optimizing a consumable input variable |
WO2018051192A3 (fr) * | 2016-09-16 | 2018-04-26 | Paul Davis | Pompe volumétrique et système de commande |
EP3339650A1 (fr) * | 2016-12-21 | 2018-06-27 | Grundfos Holding A/S | Pompe à moteur électrique |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2699278B1 (fr) * | 2011-04-20 | 2015-03-18 | KCI Licensing, Inc. | Dispositif de gestion de pression réduite distribuée à un site de tissu |
JP2013219852A (ja) * | 2012-04-05 | 2013-10-24 | Mitsubishi Electric Corp | トルク制御システム |
DE102014216230A1 (de) * | 2014-08-14 | 2016-02-18 | Continental Teves Ag & Co. Ohg | Verfahren zur Bestimmung einer Position und/oder Lageveränderung einer Hydraulikpumpe eines Kraftfahrzeugbremssystems sowie Kraftfahrzeugbremssystem |
CN104454485B (zh) * | 2014-11-24 | 2017-01-04 | 温岭市富莱欧机电有限公司 | 水泵控制器 |
DE102015204096A1 (de) * | 2015-03-06 | 2016-09-08 | Robert Bosch Gmbh | Verfahren zur Schadenserkennung bei einer Kraftstoffpumpe |
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- 2010-04-21 MX MX2010004368A patent/MX2010004368A/es active IP Right Grant
- 2010-04-21 CN CN201010209799.7A patent/CN101871447B/zh active Active
- 2010-04-21 AU AU2010201599A patent/AU2010201599B2/en active Active
- 2010-04-21 JP JP2010098216A patent/JP5479995B2/ja active Active
- 2010-04-21 EP EP10160593.9A patent/EP2246569B1/fr active Active
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Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8425200B2 (en) * | 2009-04-21 | 2013-04-23 | Xylem IP Holdings LLC. | Pump controller |
US20110255992A1 (en) * | 2009-04-21 | 2011-10-20 | Derrick Thanh Tran | Pump controller |
EP2615306A4 (fr) * | 2011-04-11 | 2015-07-08 | Fuji Electric Co Ltd | Dispositif de commande de pompe d'alimentation en eau |
US10024325B2 (en) | 2011-12-07 | 2018-07-17 | Flow Control Llc. | Pump using multi voltage electronics with run dry and over current protection |
WO2013086317A1 (fr) * | 2011-12-07 | 2013-06-13 | Flow Control Llc. | Pompe utilisant de l'électronique multitension et équipée d'une protection contre le fonctionnement à sec et la surintensité |
US9745974B2 (en) | 2011-12-07 | 2017-08-29 | Flow Control LLC | Pump using multi voltage electronics with run dry and over current protection |
US9823627B2 (en) | 2012-12-12 | 2017-11-21 | S.A. Armstrong Limited | Self learning control system and method for optimizing a consumable input variable |
US10948882B2 (en) | 2012-12-12 | 2021-03-16 | S.A. Armstrong Limited | Self learning control system and method for optimizing a consumable input variable |
US11960252B2 (en) | 2012-12-12 | 2024-04-16 | S.A. Armstrong Limited | Co-ordinated sensorless control system |
US11953864B2 (en) | 2012-12-12 | 2024-04-09 | S.A. Armstrong Limited | Self learning control system and method for optimizing a consumable input variable |
US9829868B2 (en) | 2012-12-12 | 2017-11-28 | S.A. Armstrong Limited | Co-ordinated sensorless control system |
US10429802B2 (en) | 2012-12-12 | 2019-10-01 | S.A. Armstrong Limited | Self learning control system and method for optimizing a consumable input variable |
US10466660B2 (en) | 2012-12-12 | 2019-11-05 | S.A. Armstrong Limited | Co-ordinated sensorless control system |
US11740594B2 (en) | 2012-12-12 | 2023-08-29 | S.A. Armstrong Limited | Self learning control system and method for optimizing a consumable input variable |
US11009838B2 (en) | 2012-12-12 | 2021-05-18 | S.A. Armstrong Limited | Co-ordinated sensorless control system |
US11531309B2 (en) | 2012-12-12 | 2022-12-20 | S.A. Armstrong Limited | Self learning control system and method for optimizing a consumable input variable |
US11550271B2 (en) | 2012-12-12 | 2023-01-10 | S.A. Armstrong Limited | Co-ordinated sensorless control system |
US11740595B2 (en) | 2012-12-12 | 2023-08-29 | S.A. Armstrong Limited | Co-ordinated sensorless control system |
WO2018051192A3 (fr) * | 2016-09-16 | 2018-04-26 | Paul Davis | Pompe volumétrique et système de commande |
WO2018114667A1 (fr) * | 2016-12-21 | 2018-06-28 | Grundfos Holding A/S | Pompe entraînée par un moteur électrique |
EP3339650A1 (fr) * | 2016-12-21 | 2018-06-27 | Grundfos Holding A/S | Pompe à moteur électrique |
Also Published As
Publication number | Publication date |
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MX2010004368A (es) | 2010-10-20 |
EP2246569B1 (fr) | 2023-06-28 |
JP5479995B2 (ja) | 2014-04-23 |
AU2010201599B2 (en) | 2014-06-05 |
CN101871447A (zh) | 2010-10-27 |
CN101871447B (zh) | 2015-12-16 |
AU2010201599A1 (en) | 2010-11-04 |
BRPI1002730A2 (pt) | 2012-04-03 |
EP2246569A3 (fr) | 2011-06-22 |
JP2010255634A (ja) | 2010-11-11 |
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