EP1387087A2 - Méthode pour déterminer le débit d'une pompe - Google Patents

Méthode pour déterminer le débit d'une pompe Download PDF

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Publication number
EP1387087A2
EP1387087A2 EP03009647A EP03009647A EP1387087A2 EP 1387087 A2 EP1387087 A2 EP 1387087A2 EP 03009647 A EP03009647 A EP 03009647A EP 03009647 A EP03009647 A EP 03009647A EP 1387087 A2 EP1387087 A2 EP 1387087A2
Authority
EP
European Patent Office
Prior art keywords
motor
pump
flow rate
induced voltage
determined
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
Application number
EP03009647A
Other languages
German (de)
English (en)
Other versions
EP1387087B1 (fr
EP1387087A3 (fr
Inventor
Björn Kiffer
Frank Tolksdorf
Klaus Heinrich
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.)
Wilo SE
Original Assignee
Wilo AG
Wilo SE
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 Wilo AG, Wilo SE filed Critical Wilo AG
Publication of EP1387087A2 publication Critical patent/EP1387087A2/fr
Publication of EP1387087A3 publication Critical patent/EP1387087A3/fr
Application granted granted Critical
Publication of EP1387087B1 publication Critical patent/EP1387087B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F04D15/0088—Testing machines

Definitions

  • the invention relates to a method for determining the flow rate of a fluid by a pump, in particular by means of a permanently excited, field-driven synchronous motor driven Pump.
  • the invention further relates to a pump for conveying fluid, with which the procedure can be carried out.
  • the characteristic curve (electrical Power P over flow rate Q), however, is only a very flat one Incline increases or even decreases again. In this area there is one reliable determination of the flow rate of a fluid through the pump difficult or very inaccurate only on the basis of the electrical power.
  • the object of the invention is therefore to provide a method or a pump To make available, by means of which the flow rate of a fluid through a Pump, especially one from a permanently excited, Rotary field-operated synchronous motor driven pump, reliable too is to determine.
  • this object is achieved in that in pump mode, the motor, especially the permanently excited three-phase synchronous motor, from the electrical / electronic drive is switched off at least temporarily, in particular periodically. in the switched off state can then in particular in the pump motor induced voltage in the synchronous motor detected and from the detected induced voltage, the flow rate of the fluid can be determined.
  • the method according to the invention or the pump according to the invention makes take advantage of the idea that a motor is not just electrical Drive as a motor but also vice versa as a generator can.
  • a motor is not just electrical Drive as a motor but also vice versa as a generator can.
  • the rotor can rotate from the outside an induction voltage can be tapped from the stator connections is caused by the rotation of the rotor.
  • the invention is also based on the consideration that different Flow rates in a pump driven by a motor Influence on the time course of the generator induced voltage to have.
  • the motor, z. B. the permanently excited synchronous motor, which by a Frequency converter can be driven regulated by the driving Electronics switched off at least for a predetermined time interval, so that then preferably from the time course of the detected induced voltage the flow rate can be determined.
  • the determination can e.g. by Comparison with reference characteristic curves, maps, or characteristic values.
  • the induced voltage, especially at the stator connections can be recorded, for example, by an analog-digital converter become.
  • This can e.g. with a permanently excited synchronous motor in a microcontroller, which is preferably also the Control of the inverter in the frequency converter for the drive takes over.
  • the time course of the recorded for example, induced in a buffer Voltage characteristic of the flow rate, especially in the Time of shutdown.
  • All versions have the option of changing the chronological course of the to compare induced voltage with a reference as mentioned above or for example when measuring frequency values or frequency changes to compare these with stored values to get out of this comparison to close the flow rate.
  • a pump with which such a method can be carried out contains accordingly, a circuit by means of which the detected induced voltage, in particular the temporal course of the voltage and / or values derived therefrom with a stored one Reference characteristic, a reference map or reference values comparable is.
  • the motor can be provided with to switch off a suitable engine control at a certain time and the time course of the generator voltage then induced up to Motor standstill to be measured and, if necessary, closed to save.
  • Such a time measurement interval can be kept so short that A sufficiently reliable determination of the flow rate is possible without that the pump loses speed significantly. For example, it can be sufficient that the pump only works over a period of a few induced voltage peaks, for example 2 to 10 voltage peaks, is switched off.
  • the pump When the pump is switched on again after the specified time interval it is preferably provided in synchronous motors that that to be newly created by the frequency converter on the synchronous motor
  • the rotating field is first synchronized to the motor, since it is driven by the fluid's braking effect on the original driving rotating field lags.
  • the required new rotating field for connection to the synchronous motor the previously detected induced voltage, in particular from the temporal Voltage curve is determined. For example, from the temporal Course of the detected induced voltage on the required frequency and Phase position of the rotating field to be switched on are closed.
  • Figure 1 shows the typical time course of induced voltages, the after switching off the driving rotating field on a e.g. permanent excited synchronous motor can be tapped. There are two here Measuring curves 1 and 2 are shown, whereby it can be seen that the time course of the two measurement curves at different flow rates were recorded, differ from each other.
  • FIG. 2 shows a time-resolved representation of three measurement curves 1, 2 and 3 for three different flow rates of 10 m 3 / h, 10.5 m 3 / h and 11 m 3 / h shows.
  • the temporal decrease in the induced is also characteristic Voltages, or the decrease in the height of the voltage peaks as they is shown on the basis of the envelope 3 in FIG.
  • Such envelopes also show a characteristic, for different ones Flow rates given course. It can be done accordingly from the envelopes of the voltages to the flow rate conclude, for example by comparing the recorded Tensions among themselves or by comparison with one, for example stored reference characteristic or a reference map.
  • FIG. 1 also shows the possibility of inferring a flow rate from the change in frequency of the recorded voltage curve.
  • FIG. 1 shows, for example for the voltage curve 1, that a time ⁇ t 1 can first be determined between a first voltage peak pair, a time ⁇ t 2 being measured between a subsequent voltage peak pair.
  • the change in time between the two measured values .DELTA.t 1 and .DELTA.t 2 which also simultaneously represents the change in frequency, can also be used to draw conclusions about the flow rate, for example by comparison with reference values, which can also be stored in a memory.
  • the flow rates to be determined from the detected induced voltages are not to consider in conclusion. There may be other characteristics that stand out directly or indirectly from the temporal profiles of the induced voltages let determine, be used to derive the flow rates immediately, by comparison with other measured values or by comparison with stored reference values or characteristics or maps determine.
  • a pump for performing the The procedure can be accordingly without providing another Measuring device for the current flow rate of a fluid, e.g. Water can be closed by the pump.
  • a fluid e.g. Water
  • the procedure or a accordingly, such a pump is very inexpensive and economical because essentially the inventive method by software in the Motor control, for example in the microcontroller of the Frequency converter of a synchronous motor can be realized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
EP20030009647 2002-07-29 2003-04-30 Méthode pour déterminer le débit d'une pompe Expired - Lifetime EP1387087B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10234630 2002-07-29
DE2002134630 DE10234630A1 (de) 2002-07-29 2002-07-29 Verfahren zur Bestimmung der Durchflussmenge eines Fluids durch eine Pumpe

Publications (3)

Publication Number Publication Date
EP1387087A2 true EP1387087A2 (fr) 2004-02-04
EP1387087A3 EP1387087A3 (fr) 2009-10-28
EP1387087B1 EP1387087B1 (fr) 2011-03-30

Family

ID=30010508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030009647 Expired - Lifetime EP1387087B1 (fr) 2002-07-29 2003-04-30 Méthode pour déterminer le débit d'une pompe

Country Status (2)

Country Link
EP (1) EP1387087B1 (fr)
DE (2) DE10234630A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010092238A1 (fr) * 2009-02-12 2010-08-19 Enercomp Oy Système d'observation de l'efficacité énergétique
FR2951267A1 (fr) * 2009-10-14 2011-04-15 Peugeot Citroen Automobiles Sa Dispositif de detection du niveau de liquide dans un reservoir
EP2743509A1 (fr) * 2012-12-11 2014-06-18 Pierburg GmbH Détection de fonctionnement à sec
CN113915145A (zh) * 2021-09-24 2022-01-11 北京亿华通科技股份有限公司 一种燃料电池冷却系统的超压监测控制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8909425B2 (en) * 2013-04-12 2014-12-09 GM Global Technology Operations LLC Speed-based flow device diagnostic system and method
US10859592B2 (en) * 2017-01-31 2020-12-08 Tecan Trading Ag Method of aspirating by pipetting and pipetting apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077925A (en) * 1980-06-09 1981-12-23 Gen Motors Corp Mass airflow meters
DE3327594A1 (de) * 1983-07-30 1985-02-14 Alpine Ag, 8900 Augsburg Verfahren zur massenstrom-messung
EP0877463A2 (fr) * 1994-10-27 1998-11-11 WILO GmbH Pompe à tube d'entrefer
EP0945973A2 (fr) * 1998-03-25 1999-09-29 AKO-Werke GmbH & Co. KG Dispositif de commande pour un moteur synchrone monophase

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL88344C (fr) * 1951-07-20
DE1085684B (de) * 1954-05-04 1960-07-21 Rockwell Mfg Co Verfahren und Anordnung zur Messung der Durchflussmasse eines stroemenden Mediums
GB1349054A (en) * 1970-01-30 1974-03-27 Plessey Co Ltd Mass flow measurement
DE2143826A1 (de) * 1971-09-01 1973-03-08 Mrose James E Vorrichtung zum messen des mengenstroms und/oder der gesamtdurchsatzmenge von fluden
DE2544976A1 (de) * 1975-10-08 1977-04-14 Maximilianshuette Eisenwerk Verfahren und vorrichtung zum bestimmen des durchflusses eines massestroms
CA1270656A (fr) * 1985-10-04 1990-06-26 Ronald D. Howell Produits alimentaires congeles
DE19828553C1 (de) * 1998-06-26 2000-02-03 Bosch Gmbh Robert Verfahren und Vorrichtungen zur Durchführung eines Verfahrens zur Bildung oder Anpassung eines Ansteuersignals zur Ansteuerung eines ein Druckmedium fördernden Mittels eines Fahrzeugbremssystems
EP0971212B1 (fr) * 1998-07-10 2011-04-20 Levitronix LLC Méthode pour déterminer la perte de pression et le débit d'une pompe
DE19917904C2 (de) * 1999-04-20 2001-06-07 Bosch Gmbh Robert Verfahren und Vorrichtung zur Ansteuerung einer Pumpe zur Hilfsdruckversorgung einer Fahrzeugbremsanlage und entsprechende Fahrzeugbremsanlage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077925A (en) * 1980-06-09 1981-12-23 Gen Motors Corp Mass airflow meters
DE3327594A1 (de) * 1983-07-30 1985-02-14 Alpine Ag, 8900 Augsburg Verfahren zur massenstrom-messung
EP0877463A2 (fr) * 1994-10-27 1998-11-11 WILO GmbH Pompe à tube d'entrefer
EP0945973A2 (fr) * 1998-03-25 1999-09-29 AKO-Werke GmbH & Co. KG Dispositif de commande pour un moteur synchrone monophase

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010092238A1 (fr) * 2009-02-12 2010-08-19 Enercomp Oy Système d'observation de l'efficacité énergétique
FR2951267A1 (fr) * 2009-10-14 2011-04-15 Peugeot Citroen Automobiles Sa Dispositif de detection du niveau de liquide dans un reservoir
EP2743509A1 (fr) * 2012-12-11 2014-06-18 Pierburg GmbH Détection de fonctionnement à sec
CN113915145A (zh) * 2021-09-24 2022-01-11 北京亿华通科技股份有限公司 一种燃料电池冷却系统的超压监测控制方法

Also Published As

Publication number Publication date
EP1387087B1 (fr) 2011-03-30
DE10234630A1 (de) 2004-04-08
DE50313576D1 (de) 2011-05-12
EP1387087A3 (fr) 2009-10-28

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