WO1999061964A1 - Procede d'etalonnage de la regulation de la frequence de rotation d'un moteur electrique pour l'entrainement d'une pompe - Google Patents

Procede d'etalonnage de la regulation de la frequence de rotation d'un moteur electrique pour l'entrainement d'une pompe Download PDF

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Publication number
WO1999061964A1
WO1999061964A1 PCT/CH1999/000212 CH9900212W WO9961964A1 WO 1999061964 A1 WO1999061964 A1 WO 1999061964A1 CH 9900212 W CH9900212 W CH 9900212W WO 9961964 A1 WO9961964 A1 WO 9961964A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric motor
max
speed
current
variable
Prior art date
Application number
PCT/CH1999/000212
Other languages
German (de)
English (en)
Inventor
Franz Rudin
Original Assignee
Rudair Ag
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 Rudair Ag filed Critical Rudair Ag
Priority to AU35933/99A priority Critical patent/AU3593399A/en
Priority to HU0101477A priority patent/HUP0101477A3/hu
Priority to EP99917737A priority patent/EP1082645A1/fr
Priority to SK1738-2000A priority patent/SK17382000A3/sk
Priority to PL99344453A priority patent/PL344453A1/xx
Publication of WO1999061964A1 publication Critical patent/WO1999061964A1/fr

Links

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
    • F04B49/06—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
    • 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
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1201—Rotational speed of the axis
    • 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
    • F04B2203/0209—Rotational speed

Definitions

  • the present invention relates to a method for regulating the speed of an electric motor for driving a delivery unit with regard to the time-varying power requirement to be satisfied by the delivery unit on the consumer side.
  • centrifugal machines such as pumps or fans, but also piston or gear pumps, come into consideration as delivery units.
  • the speed of the electric motor is determined by the output size of a controller.
  • the presentation initially only refers to gyroscopes without wishing to restrict the scope of protection.
  • DE-44 23 736 discloses a refined power control which is based on the electrical active current of a gyroscopic machine in hy to use drastically variable purchase quantities as a benchmark.
  • a pump is provided as a rotary working machine, which is driven by an electric motor.
  • the current consumption of the electric motor is recorded, which represents a measure of the amount of hot water consumed in the flow.
  • the pump constantly provides an oversupply and when the purchase amount increases, the current consumption increases and, depending on the law, the speed of the electric motor.
  • the speed is at least approximately linear to the flow rate.
  • a controller is arranged within the control loop, which can be set to a selectable current consumption / speed characteristic in relation to the purchase quantity.
  • the controller determines a difference between the setpoint and the detected motor current. Depending on the difference signal determined, the control device emits an increased control signal, which triggers an increased speed on the electric motor. As a result, the pump increases its delivery rate and delivers the planned oversupply again.
  • the procedure is analogous for a reduction in the purchase quantity.
  • the oversupply that can be delivered by the pump is exceeded compared to the desired oversupply and consequently the detected current consumption of the motor drops.
  • the controller determines a difference between the setpoint and the detected motor current.
  • the control device emits a reduced control signal, which triggers a speed reduction on the electric motor.
  • the pump reduces its delivery rate and the planned oversupply is reduced to the desired level.
  • the regulation was improved by bringing the supply of the motor-driven pump closer to actual demand.
  • EP-B-0 279 939 Another method for pump control is described in EP-B-0 279 939.
  • a measuring sensor is provided in the pipe system to record the water flow rate. Proportional to the flow velocity and in accordance with the pipe network characteristic, an excessive voltage signal is generated, which is fed as an input variable to a controller connected to the continuously variable-speed electric motor. The output size of the controller determines the speed of the motor. If the input signal deviates from the specified bandwidth, the output signal is adjusted accordingly.
  • a characteristic curve must be available and, overall, a considerable outlay on equipment is required.
  • the invention has for its object to propose a further improved control method for the local application, where both the equipment and the operational effort are kept as low as possible and thereby by closely orientating to the real power requirement Operation with minimal energy consumption is feasible.
  • the method for regulating the speed of an electric motor for driving a conveyor unit with regard to the time-varying power requirement to be satisfied on the consumer side by the conveyor unit is based on the following measures.
  • the speed of the electric motor is determined by the output size of a controller.
  • the current absorbed by the electric motor is measured and a signal representing the current measured is generated, which is fed to the controller as an input variable.
  • the input variable is automatically calibrated in the controller.
  • FIG. 1 a speed-current diagram for the start phase of the calibration
  • Figure 2 a speed-current diagram for tracking the speed
  • FIG. 3 a volume flow-speed diagram for the continuous tracing of consumption.
  • the method is directed to the speed control of an electric motor driving a conveying unit - preferably in the form of a gyroscope.
  • the conveyor unit could e.g. be a pump or a fan.
  • a controller is used to influence the electric motor, the output variable of which determines the motor speed.
  • the measured motor current which is directly related to the volume flow delivered and consumed as consumption, is used as the reference variable.
  • a signal corresponding to the magnitude of the motor current consumed is generated which represents the input variable for the controller.
  • the input variable is automatically calculated and calibrated and used as an output signal, e.g. as 0 to 10 V DC, output to a control element of the motor.
  • the calculation and calibration are based on the following premises and in the following sequence.
  • the base load such as the no-load current of the electric motor, which depends on the size and quality of the motor, is reflected in the offset, ie in 1 min .
  • the electricity demand is made up of two giants, the base load electricity and the variable, demand-dependent electricity required for media transport. proportion of.
  • the average values of the respective current requirement I resulting for each speed result in three values which are registered as input variables x 1 t x 2 and x 3 .
  • a parabola section is created, from which the theoretical 100% value with l max can be calculated as follows. Due to the proportional relationship between speed n and current requirement l, a 100% value can be calculated from l 2 and l 3 . An average m 1 is formed from the two 100% values and after deduction from the offset lj the theoretical value l max is obtained .
  • the approximation formula for calculating l max is:
  • the condition should be that the mean values of l ⁇ ⁇ l 2 ⁇ l 3 .
  • the speed of the electric motor is tracked corresponding to the current change in the consumer's power requirement.
  • the calibrated motor current I currently pending is increased by a defined amount, the stability of the control resulting from the continuously updated consumption-dependent setting change on the actuator on the consumer side.
  • control methods according to the state of the art require a specification which is defined as an output characteristic or is generated and stored by a function. If the input signal differs beyond a limited bandwidth, the output signal is adjusted accordingly.
  • the calculated input signal is designed in the start-up phase in such a way that, for example, I max results in a 1 or 10 V current consumption of the electric motor for a computationally processed input signal.
  • a setpoint is specified for the subsequent consumption, which increases the output size in an equivalent manner.
  • the output size of 60% software moderately increased by 10%, resulting in an initial size of 66%.
  • the setpoint addition can also be determined empirically as a function of the output signal.
  • l max The calculation of l max is carried out in a targeted manner slightly below the practical 100% limit of l max , so that the software can adapt to the exact 100% of l max in the practical procedure. If the calculated I max is reached, l max remains at its value for the time provided in the program run, provided that consumption does not decrease. Then l max is reset for a defined time, for example by 1% of the output variable, and the resulting input variable represents the new value for l max in the calibration. Likewise, the l min determined during calibration - ie the offset - becomes a drop below the same by a defined value in each case until the effective 1 min - ie the effective offset - is reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

L'invention concerne la régulation de la fréquence de rotation d'un moteur électrique pour l'entraînement d'un groupe de circulation de milieux liquides ou gazeux, par exemple, d'une machine centrifuge, sous forme d'une pompe ou d'un ventilateur. Les demandes en énergie émanant de l'utilisateur, variant en fonction du temps et devant être satisfaites sont réglées via la fréquence de rotation du moteur. La fréquence de rotation du moteur électrique est déterminée par la grandeur de sortie d'un régulateur. L'intensité de courant absorbée par le moteur électrique est mesurée, et un signal représentatif de l'intensité de courant mesurée à chaque fois est généré, ce signal étant envoyé au régulateur en tant que grandeur d'entrée. L'étalonnage automatique de la grandeur d'entrée s'effectue dans le régulateur, ce qui permet de supprimer des détecteurs de mesure ou de longs conduits de mesure utilisés habituellement en technique des fluides. En outre, il n'est plus nécessaire de recourir à la détection d'une caractéristique d'installation, ce qui simplifie la mise en service d'une telle installation, réduit les frais et contribue à une économie d'énergie, le procédé assurant néanmoins une haute rentabilité et stabilité de régulation.
PCT/CH1999/000212 1998-05-22 1999-05-19 Procede d'etalonnage de la regulation de la frequence de rotation d'un moteur electrique pour l'entrainement d'une pompe WO1999061964A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU35933/99A AU3593399A (en) 1998-05-22 1999-05-19 Method for calibrating the speed of an electric pump-drive motor
HU0101477A HUP0101477A3 (en) 1998-05-22 1999-05-19 Method for calibrating the speed of an electric pump-drive motor
EP99917737A EP1082645A1 (fr) 1998-05-22 1999-05-19 Procede d'etalonnage de la regulation de la frequence de rotation d'un moteur electrique pour l'entrainement d'une pompe
SK1738-2000A SK17382000A3 (sk) 1998-05-22 1999-05-19 Spôsob regulácie počtu otáčok elektromotora na pohon čerpacieho agregátu
PL99344453A PL344453A1 (en) 1998-05-22 1999-05-19 Method for calibrating the speed of an electric pump-drive motor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH1124/98 1998-05-22
CH112498 1998-05-22
CH2419/98 1998-12-04
CH241998 1998-12-04

Publications (1)

Publication Number Publication Date
WO1999061964A1 true WO1999061964A1 (fr) 1999-12-02

Family

ID=25686720

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1999/000212 WO1999061964A1 (fr) 1998-05-22 1999-05-19 Procede d'etalonnage de la regulation de la frequence de rotation d'un moteur electrique pour l'entrainement d'une pompe

Country Status (6)

Country Link
EP (1) EP1082645A1 (fr)
AU (1) AU3593399A (fr)
HU (1) HUP0101477A3 (fr)
PL (1) PL344453A1 (fr)
SK (1) SK17382000A3 (fr)
WO (1) WO1999061964A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001011748A1 (fr) * 1999-08-04 2001-02-15 Ksb Aktiengesellschaft Controle de defaut d'une machine entrainee par un moteur electrique
DE10035829C2 (de) * 1999-08-14 2002-07-18 Ziehl Abegg Gmbh & Co Kg Verfahren zum Betreiben einer Lüftungseinrichtung sowie Lüftungseinrichtung
DE102004057712A1 (de) * 2004-11-30 2006-06-08 Conti Temic Microelectronic Gmbh Verfahren zur Bestimmung der Belastung eines elektrischen Antriebsmotors
AT518199A1 (de) * 2016-01-18 2017-08-15 Secop Gmbh Verfahren zur Detektion eines blockierten Ventils eines Kältemittelkompressors und ein Steuerungssystem für einen Kältemittelkompressor
EP4174315A1 (fr) * 2021-10-28 2023-05-03 Danfoss Power Solutions Inc. Système d'étalonnage de courant de démarrage de pompe électrohydraulique sur la base du signal de couple de sortie du moteur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210082A1 (de) * 1981-04-02 1982-10-21 IWE Ingenieurgesellschaft für wirtschaftliche Energienutzung mbH, 6078 Neu-Isenburg Verfahren und schaltungsanordnung zur regelung der drehzahl eines pumpenmotors
EP0279939A1 (fr) * 1987-01-29 1988-08-31 Ewald Hennel Méthode de contrôle du débit d'une pompe de circulation
EP0444269A2 (fr) * 1990-02-28 1991-09-04 Ewald Hennel Procédé de régulation de la charge d'une pompe
DE4423736A1 (de) * 1993-07-09 1995-01-12 Franz Rudin Verfahren zur Regelung der Leistung einer durch einen Elektromotor angetriebenen Kreiselarbeitsmaschine
WO1998004835A1 (fr) * 1996-07-29 1998-02-05 Gebr. Becker Gmbh & Co. Procede de regulation d'une unite et d'un convertisseur de frequence

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210082A1 (de) * 1981-04-02 1982-10-21 IWE Ingenieurgesellschaft für wirtschaftliche Energienutzung mbH, 6078 Neu-Isenburg Verfahren und schaltungsanordnung zur regelung der drehzahl eines pumpenmotors
EP0279939A1 (fr) * 1987-01-29 1988-08-31 Ewald Hennel Méthode de contrôle du débit d'une pompe de circulation
EP0444269A2 (fr) * 1990-02-28 1991-09-04 Ewald Hennel Procédé de régulation de la charge d'une pompe
DE4423736A1 (de) * 1993-07-09 1995-01-12 Franz Rudin Verfahren zur Regelung der Leistung einer durch einen Elektromotor angetriebenen Kreiselarbeitsmaschine
WO1998004835A1 (fr) * 1996-07-29 1998-02-05 Gebr. Becker Gmbh & Co. Procede de regulation d'une unite et d'un convertisseur de frequence

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001011748A1 (fr) * 1999-08-04 2001-02-15 Ksb Aktiengesellschaft Controle de defaut d'une machine entrainee par un moteur electrique
DE10035829C2 (de) * 1999-08-14 2002-07-18 Ziehl Abegg Gmbh & Co Kg Verfahren zum Betreiben einer Lüftungseinrichtung sowie Lüftungseinrichtung
DE102004057712A1 (de) * 2004-11-30 2006-06-08 Conti Temic Microelectronic Gmbh Verfahren zur Bestimmung der Belastung eines elektrischen Antriebsmotors
AT518199A1 (de) * 2016-01-18 2017-08-15 Secop Gmbh Verfahren zur Detektion eines blockierten Ventils eines Kältemittelkompressors und ein Steuerungssystem für einen Kältemittelkompressor
AT518199B1 (de) * 2016-01-18 2017-11-15 Secop Gmbh Verfahren zur Detektion eines blockierten Ventils eines Kältemittelkompressors und ein Steuerungssystem für einen Kältemittelkompressor
EP4174315A1 (fr) * 2021-10-28 2023-05-03 Danfoss Power Solutions Inc. Système d'étalonnage de courant de démarrage de pompe électrohydraulique sur la base du signal de couple de sortie du moteur

Also Published As

Publication number Publication date
EP1082645A1 (fr) 2001-03-14
AU3593399A (en) 1999-12-13
SK17382000A3 (sk) 2001-10-08
HUP0101477A3 (en) 2002-03-28
HUP0101477A2 (hu) 2001-09-28
PL344453A1 (en) 2001-11-05

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