EP1138950B1 - Régulateur de pompes - Google Patents

Régulateur de pompes Download PDF

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Publication number
EP1138950B1
EP1138950B1 EP00890098A EP00890098A EP1138950B1 EP 1138950 B1 EP1138950 B1 EP 1138950B1 EP 00890098 A EP00890098 A EP 00890098A EP 00890098 A EP00890098 A EP 00890098A EP 1138950 B1 EP1138950 B1 EP 1138950B1
Authority
EP
European Patent Office
Prior art keywords
controller
pump
pressure
control circuit
transfer function
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.)
Expired - Lifetime
Application number
EP00890098A
Other languages
German (de)
English (en)
Other versions
EP1138950A1 (fr
Inventor
Manfred Sacher
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.)
Xylem Water Solutions Austria GmbH
Original Assignee
Pumpenfabrik Ernst Vogel GmbH
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8175919&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1138950(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Pumpenfabrik Ernst Vogel GmbH filed Critical Pumpenfabrik Ernst Vogel GmbH
Priority to AT00890098T priority Critical patent/ATE257548T1/de
Priority to EP00890098A priority patent/EP1138950B1/fr
Priority to DE50004980T priority patent/DE50004980D1/de
Priority to DK00890098T priority patent/DK1138950T3/da
Publication of EP1138950A1 publication Critical patent/EP1138950A1/fr
Application granted granted Critical
Publication of EP1138950B1 publication Critical patent/EP1138950B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • F04B49/20—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 by changing the driving speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine

Definitions

  • the invention relates to a system with at least one liquid pump, preferably centrifugal pump, which is driven by an electric motor and with a controller for comparing an actual value of an output pressure of Liquid pump with a predetermined setpoint of the outlet pressure and a Output signal, which depends on the result of the comparison and a Transfer function of the controller varies and a speed control device for Control of the electric motor is supplied.
  • a liquid pump preferably centrifugal pump
  • a controller for comparing an actual value of an output pressure of Liquid pump with a predetermined setpoint of the outlet pressure and a Output signal, which depends on the result of the comparison and a Transfer function of the controller varies and a speed control device for Control of the electric motor is supplied.
  • the required speed of the pumps is usually determined by means of P (proportional), PI (proportional-integral) or PID (proportional-integral-derivative) controllers Comparison of a measured actual value of the pump output pressure or the Consumer pressure in the system with a predetermined setpoint of this pressure determined and a corresponding output signal of the controller the speed controller supplied to the motor of the liquid pump.
  • Fig. 4 is a pressure-time diagram for this purpose.
  • the pump 1 in In this case, a centrifugal pump, by the electric motor 2, here a Three-phase short-circuited motor or a DC motor, powered.
  • a speed control device 3 e.g. a frequency converter Three-phase short-circuiting motors or a Thyristorstromrichter at DC motors or a voltage regulator.
  • This speed controller 3 receives the aforementioned signal of a PI controller 4, which receives this signal on the basis of Comparison of the values of the pressure / actual value encoder 5 and the pressure setpoint encoder 6 determined.
  • the consumers are connected.
  • the Diagram of FIG. 2 illustrates the operation of this known plant in Operation, wherein along the abscissa the time t and along the ordinate the pressure D are applied.
  • St is the start time
  • H indicates the start time
  • DB refers to continuous operation
  • the DS line indicates the pressure setpoint.
  • the Dashed line FD indicates the course of the delivery pressure or output pressure of the Pump in the operation of this system, wherein this delivery pressure to the pressure in Supply network N is equal and represents a function of the speed of the motor.
  • the invention is based on the object, the uneconomical operation of the pump to suppress at zero flow rates and thus unnecessary To avoid energy consumption and extend the life of the pump.
  • This object is achieved in that a control circuit is provided, which cyclically varies at least one of the control parameters of the controller.
  • the present invention is characterized in that a P, PI, or PID controller is used in the operation of the invention, the can provide continuously variable ramps of delivery pressure.
  • a preferred embodiment of the system according to the invention is characterized characterized in that the control circuit, suitably via a setpoint generator, the The setpoint supplied to the controller varies.
  • Another embodiment of the invention is characterized in that the Transfer function of the controller has a proportional member, by the Control circuit is varied.
  • the transfer function of the regulator comprises an integrator which is varied by the control circuit.
  • the plant has the Transfer function of the controller to a differentiator, by the Control circuit is varied.
  • Speed controller expediently used a frequency converter.
  • the motor of the liquid pump is a DC motor
  • each Pump a separate speed control device and a separate controller provided.
  • FIG. 1 shows two variants of a system according to the invention and FIG. 2 shows an associated one Pressure-time diagram.
  • the inventive system of Fig. 1 corresponds in many parts of those known in 3 and comprises a liquid pump 1, e.g. a Centrifugal pump, which is driven by an electric motor 2.
  • the engine 2 is from a speed control device 3, e.g. a frequency converter Three-phase short-circuiting motors or a Thyristorstromrichter at DC motors or a voltage regulator, driven.
  • This Speed control device 3 receives a control output signal 4a from a controller 4, the one has predetermined transmission behavior, the proportional, integral and / or May have differential components.
  • controller 4 is a PID controller executed.
  • the controller 4 receives its input signals on the one hand from a Pressure-actual value transmitter 5, which is a transformed into an electrical value pressure value the pump output or the consumer pressure of the network N to which the pump is connected, and on the other hand from a pressure setpoint encoder 6, the one Specifies setpoint of the consumer pressure that reaches as quickly and accurately shall be.
  • the controller 4 calculates in known manner the said output signal 4a, the acts on the speed control unit 3.
  • consumers are also connected to the grid connected. As indicated by dashed lines, can still be a storage vessel 8 to the Be connected to consumer network N.
  • control circuit 10 which is on the pressure setpoint encoder. 6 and / or acts directly on the controller 4 and cyclically - regardless of whether in regular or irregular time intervals - control parameters of the controller 4 and / or the Pressure setpoint adjusted.
  • the control parameters can be coefficients of Proportional, integral and / or differential terms of the transfer function of Regulator.
  • the dashed line GL makes the respective delivery pressure of the pump 1 as a function of speed
  • the dot-dash line Line PL the pressure in the supply network N visible.
  • GL and PL climb along ramp up and substantially simultaneously until the upper limit a of the pressure setpoint in the consumer network is almost reached. Now go the ramp-up of GL and PL steadily in an asymptote to the horizontal line a on, where the Consumption is readjusted accordingly.
  • the lag of the delivery pressure of Pump compared to the consumer pressure is negligible and therefore in the Drawing not shown.
  • the control circuit 10 switches Pressure setpoint for the first time to the lower limit e, and the controller 4 is similar due to reduced pumping capacity accordingly.
  • the curves GL and PL decrease accordingly.
  • a further change of the Pressure setpoint by the control circuit 10 this time again to the upper Limit a.
  • Delivery pressure GL and consumer pressure PL increase accordingly. It is Note that until now fluid has been withdrawn from the system, i. one Consumption has taken place. However, this consumption ends at time E, which is why the delivery rate of the pump is regulated back.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Valve Device For Special Equipments (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Power Steering Mechanism (AREA)
  • Control Of Multiple Motors (AREA)

Claims (8)

  1. Installation avec au moins une pompe à liquide (1), de préférence une pompe centrifuge, qui est actionnée par un moteur électrique (2) et avec un régulateur (4) pour comparer une valeur réelle d'une pression de sortie de la pompe à liquide à une valeur théorique de référence d'une pression de sortie et à un signal de sortie (4a), qui varie en fonction du résultat de la comparaison et d'une fonction de transmission du régulateur, et est transmis à un régulateur de vitesse (3) pour la commande du moteur électrique (2), caractérisé en ce qu'un circuit de commande (10) est prévu, lequel fait varier de manière cyclique la fonction de transmission du régulateur (4).
  2. Installation selon la revendication 1, caractérisée en ce que la fonction de transmission du régulateur (4) présente un élément de transfert à action proportionnelle qui varie par le biais du circuit de commande (10).
  3. Installation selon l'une des revendications 1 ou 2, caractérisée en ce que la fonction de transmission du régulateur (4) présente un élément à intégration qui varie par le biais du circuit de commande (10).
  4. Installation selon l'une des revendications 1 à 3, caractérisée en ce que la fonction de transmission du régulateur (4) présente un élément différenciateur qui varie par le biais du circuit de commande (10).
  5. Installation selon l'une des revendications 1 à 4, caractérisée en ce que le circuit de commande (10) varie la valeur théorique transmise au régulateur (4), de préférence par le biais d'un transmetteur de valeurs théoriques (6).
  6. Installation selon l'une des revendications 1 à 5, caractérisée en ce que le moteur (2) est un moteur triphasé et le régulateur de vitesse (3) est un convertisseur de fréquence.
  7. Installation selon l'une des revendications 1 à 6, caractérisée en ce que le moteur (2) est un moteur à courant continu et le régulateur de vitesse (3) est un convertisseur ou un régulateur de tension.
  8. Installation selon l'une des revendications 1 à 7, caractérisée en ce que, lorsqu'il y a plus d'une pompe à liquide (1), un régulateur de vitesse (3) et un régulateur individuel (4) sont prévus pour chaque pompe.
EP00890098A 2000-03-27 2000-03-27 Régulateur de pompes Expired - Lifetime EP1138950B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT00890098T ATE257548T1 (de) 2000-03-27 2000-03-27 Pumpensteuergerät
EP00890098A EP1138950B1 (fr) 2000-03-27 2000-03-27 Régulateur de pompes
DE50004980T DE50004980D1 (de) 2000-03-27 2000-03-27 Pumpensteuergerät
DK00890098T DK1138950T3 (da) 2000-03-27 2000-03-27 Pumpestyreapparat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00890098A EP1138950B1 (fr) 2000-03-27 2000-03-27 Régulateur de pompes

Publications (2)

Publication Number Publication Date
EP1138950A1 EP1138950A1 (fr) 2001-10-04
EP1138950B1 true EP1138950B1 (fr) 2004-01-07

Family

ID=8175919

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00890098A Expired - Lifetime EP1138950B1 (fr) 2000-03-27 2000-03-27 Régulateur de pompes

Country Status (4)

Country Link
EP (1) EP1138950B1 (fr)
AT (1) ATE257548T1 (fr)
DE (1) DE50004980D1 (fr)
DK (1) DK1138950T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0310643D0 (en) 2003-05-09 2003-06-11 Rolls Royce Plc Pump control system
DE102005027091A1 (de) * 2005-06-11 2006-12-14 Ksb Ag Betriebsverfahren für eine Abwasserhebeanlage und mit diesem Verfahren betriebene Anlage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4430698A (en) * 1981-08-20 1984-02-07 Harrel, Incorporated Three-mode process control
DE3824293A1 (de) * 1988-07-18 1990-01-25 Loewe Pumpenfabrik Gmbh Verfahren zur sollwertverstellung in geregelten pumpensystemen
DE59400789D1 (de) 1993-04-08 1996-11-14 Vogel Pumpen Anlage mit mindestens einer Flüssigkeitspumpe
US5580221A (en) * 1994-10-05 1996-12-03 Franklin Electric Co., Inc. Motor drive circuit for pressure control of a pumping system

Also Published As

Publication number Publication date
ATE257548T1 (de) 2004-01-15
DE50004980D1 (de) 2004-02-12
EP1138950A1 (fr) 2001-10-04
DK1138950T3 (da) 2004-05-03

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