EP1256723A1 - Motor pump unit controlled by electric current analysis - Google Patents

Motor pump unit controlled by electric current analysis Download PDF

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Publication number
EP1256723A1
EP1256723A1 EP02290925A EP02290925A EP1256723A1 EP 1256723 A1 EP1256723 A1 EP 1256723A1 EP 02290925 A EP02290925 A EP 02290925A EP 02290925 A EP02290925 A EP 02290925A EP 1256723 A1 EP1256723 A1 EP 1256723A1
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EP
European Patent Office
Prior art keywords
motor
phase
phase shift
pump
current
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Granted
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EP02290925A
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German (de)
French (fr)
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EP1256723B1 (en
Inventor
Pascal Vinzio
Louis Symoens
Jacques Berthon
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KSB SAS
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KSB SAS
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Publication of EP1256723A1 publication Critical patent/EP1256723A1/en
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    • 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
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
    • F04D15/0254—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump the condition being speed or load
    • 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
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0236—Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption

Definitions

  • the present invention relates to groups motor pumps and applies particularly to motor pump groups submerged, intended in particular to collect effluents and in particular to small power pumps, less than 4 kW whose coupling of motor winding is in star (motor phase winding).
  • a pump unit intended to pump oil. It is a large pump unit power whose coupling of the motor winding is necessarily in triangle, given the power of the engine, and as pointed out the indication, from line 10 of the first column, of the use of soft starters which apply for high power pumps.
  • the pump unit includes means for measuring a parameter which may be the phase difference between voltage and current, although in the example concrete of realization the parameter is only the current. We measure the possibly current the cosine phi every 25 s in the example of production. It is recommended to carry out this sampling every quarter of second at 15 min.
  • the signal representative of the absorbed current is the current going through the feeding phases and not directly into the phase of work.
  • the present invention does not aim at an engine of this kind of great power with coupling of the motor winding in triangle as it is also described in US-4,473,338.
  • a small power pump unit includes a pump driven by an alternating current electric motor, having at minus a work phase.
  • the engine may in particular be an engine single phase or three phase motor.
  • the pump set is intended to be placed in a pit or in a tank and to be started, when it is necessary to empty the pit.
  • a low level sensor in particular integrated into the group motor pump, which gives the order to stop the motor and therefore the pump, so that it does not run empty.
  • the float which is located at a very low level in the pit is very dirty. Although it is arranged as low as possible, there necessarily remains, effluents at the bottom of the pit, which cause clogging and odor problems.
  • the setting and installing a low level sensor like this are complicated and maintenance is tedious.
  • the invention remedies these drawbacks by a group motor pump, which dispenses with a low level sensor and which eliminates suddenly all the difficulties of installation, maintenance, odor and clogging from the bottom of the tank, and which allows the tank to be completely emptied, without taking the risk that the pump will no longer be supplied and works without load, while being insensitive to variations in voltage power supply and measurement disturbances if the group parameters motor pump are modified and without imposing a difference in the power taken by the pump under load and vacuum. We're looking for an immediate shutdown, and not only a long term regulation, if there is a danger of re-priming.
  • the invention therefore relates to a motor pump group comprising a pump driven by an electric current motor alternative with at least one working phase, and an integrated microprocessor to one of the inputs of which the supply sector voltage is applied, and to another input from which a signal representative of the current is sent absorbed in the working phase of the engine.
  • the microprocessor includes means for measuring the phase shift between voltage and current, means of continuous observation of the stability of the phase shift after it has stabilized at a constant value, means for memorizing the constant stabilized value of the phase shift, and means for switching off the engine, when, after the phase shift has stabilized, the phase shift takes, for a prescribed period, a value greater than the stabilized value.
  • the signal representative of the absorbed current is the current passing only in the working phase (winding by motor phase). We can take this current using a measuring chain, a current transformer, or also across a type switch triac, which is currently the preferred solution.
  • the pump set can include a high level of the liquid to be conveyed, connected to an input of the microprocessor, way to send a signal to start the pump set and means for measuring the phase shift, only when the sensor detects a high level.
  • the microprocessor thus remains in standby state and does not enter action only when the pump set is operating.
  • Means for determining the stability of the phase shift may include means for measuring the constancy of the current.
  • the means of determining the stability of the phase shift include an intermediate liquid level sensor, detecting a level between the high level detected by the high level sensor and a low level, corresponding to switching off the motor. These means of finding with intermediate level sensor are relatively simple and very safe.
  • the means of determining the stability of the phase shift may include a timer that is triggered by the signal from the level sensor, and which, after a prescribed flow time, decides that the phase shift is stable. If indeed, a certain flow time of 4 to 5 s has elapsed while the phase shift is stable, we can consider that we are no longer in the transitional phase. The means of observation operate continuously and react immediately to any variation instantaneous cosine phi.
  • the pump set shown in Figure 1 is placed in a pit F. It includes a motor which drives a pump 2 centrifugal, having a suction skirt 3 and a discharge pipe 4, conveying the effluents contained in the pit F outside of the latter.
  • the motor 1 is supplied with current, via supply line 5 by sector S.
  • a high level sensor 6, which is likely to detect the level of effluents in pit F.
  • a level sensor 7 is mounted on the motor 1 a level sensor 7 intermediate.
  • a microprocessor 8 connected by a line 9 to a circuit 10 for measuring the current entering a working phase of the engine 1.
  • the motor is a single-phase motor, which includes a main phase 11 or work phase and a phase auxiliary 12, which is in series with a capacitor 13.
  • the motor 1 is controlled by a control device 14.
  • a voltage signal taken from the power supply 5 comes via a line 15 to a terminal of the microprocessor 8.
  • a reference signal comes via a line 16, from the power supply S, to an input of the microprocessor 8.
  • the microprocessor receives by a line 17, a signal from high level sensor 6.
  • the microprocessor 8 continuously measures the phase shift between the voltage signal applied by line 15 and the signal current applied by line 9.
  • the microprocessor 8 is connected by a line 18 to means 19 for memorizing the phase shift in steady state.
  • the device 19 for memorizing the stabilized value of the phase shift is connected by a line 20 to a comparator 21, which is connected, by a line 22, to a device 23 for memorizing the instantaneous value of the phase shift, value provided by the o microprocessor 8, via a line 24.
  • the comparison in the comparator 21 between the stabilized value of the phase shift provided by the device 19 and the instantaneous value of the phase shift provided by the device 23, is sent to a device 25 via a line 26. This device 25 determines if the instantaneous value of the phase shift is greater than the value stabilized.
  • the timer 28 sends a line 27 to a timer 28, a corresponding signal and the timer 28 determines whether the elapsed time while the device 25 transmits the signal in question, is greater than 200 ms. If this is the case, the timer 28 sends by a line 29, an order engine stop, to an on / off device 30 which transmits it by a line 31 to the engine control device 14.
  • the microprocessor 8 is connected to the on / off device 30, by a line 32 enabling the motor 1 energized.
  • the entire arrangement 8 to 30 preferably consists in the form of software.
  • the intermediate level sensor 7 is connected to the microprocessor 8, by a line 33.
  • the pump set operates as follows.
  • sensor 6 When the water level in pit 1 reaches the level high detected by sensor 6, sensor 6 sends a signal to line 17 microprocessor 8, which sends via line 32, a signal to device 30 of On Off.
  • the device 30 gives the order by line 31 to the device 14 of control, to start engine 1.
  • Pump 2 is running.
  • the water level drops at the intermediate sensor 7. This one sends by line 33 a signal to the finding microprocessor 8, from the phase shift between voltage and current.
  • the microprocessor 8 measures or then notes the phase difference between voltage and current and sends the value stabilized from this phase shift to the storage device 19 by line 18.
  • the microprocessor 8 sends continuously by line 24, at device 23, the instantaneous value of the phase shift between the current and voltage supplied by lines 9 and 15.
  • the comparator 21 which compare the values provided by device 19 and device 23, sends via line 26 a signal to the device 25.
  • the device 25 ascertains whether the phase shift is greater than a given value by a determined amount. Yes this is the case, it sends a signal through line 27 to timer 28, which determines if it receives this signal for a prescribed time. If that is the case, the timer 28 gives the command via line 29 to the on / off device 30, send a signal 31 to the engine stop control device 14 1.
  • the sensor 7 of intermediate level is replaced by a timer 7 which is triggered by the signal from the high level sensor 6 and which, after a flow time prescribed, decides that the phase difference between the current supplied by line 9 and the voltage supplied by line 15 is stable.
  • the means of finding the stability of the phase shift include means in the microprocessor 8 for measuring the constancy of the current supplied by line 9.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Electric Motors In General (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Amplifiers (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Flow Control (AREA)

Abstract

The motor pump includes a high liquid level sensor (6) connected to an input of a microprocessor (8) and out of phase measuring system for measuring so as to send a start signal to the motor or pump only when the sensors detects a high liquid level. An out of phase stability monitoring unit includes a system for measuring the current level and includes an intermediate liquid level sensor (7) which detects a level between high and low corresponding to motor voltage cutoff. The immersed motor/pump unit includes a pump (2) and AC motor (1) having at least a working phase and a microprocessor integrated in one of the inputs to which a supply voltage is applied and to another input from which is sent a signal representing the current absorbed in the motor phase. The microprocessor includes a system for measuring the phase difference between voltage and current. The microprocessor includes: (a) A system for continuous monitoring of the phase difference stability after it has settled at a constant value; (b) Memory for storing out of phase values, and; (c) Supply voltage cutoff switches which interrupt the supply voltage to the motor when, after out of phase is stabilized, the out of phase value, during a set time period, reaches a value greater than the stabilized value and the signal representing the absorbed current is the current passing only through the working phase.

Description

La présente invention se rapporte aux groupes motopompes et s'applique tout particulièrement aux groupes motopompes immergés, destinés notamment à relever des effluents et tout particulièrement à des pompes de petite puissance, inférieure à 4 kW dont le couplage du bobinage moteur est en étoile (bobinage par phase du moteur).The present invention relates to groups motor pumps and applies particularly to motor pump groups submerged, intended in particular to collect effluents and in particular to small power pumps, less than 4 kW whose coupling of motor winding is in star (motor phase winding).

Au US-A 5 015 531, on décrit un groupe motopompe destiné à pomper du pétrole. Il s'agit d'un groupe motopompe de grande puissance dont le couplage du bobinage moteur est nécessairement en triangle, compte tenu de la puissance du moteur, et comme le souligne l'indication, dès la ligne 10 de la première colonne, de l'utilisation de démarreurs doux qui s'appliquent pour des pompes de grande puissance. Le groupe motopompe comprend des moyens de mesure d'un paramètre qui peut être le déphasage entre la tension et le courant, bien que dans l'exemple concret de réalisation le paramètre soit seulement le courant. On mesure le courant éventuellement le cosinus phi toutes les 25 s dans l'exemple de réalisation. On préconise d'effectuer cet échantillonnage tous les quarts de seconde à 15 min. Le signal représentatif du courant absorbé est le courant passant dans les phases d'alimentation et non pas directement dans la phase de travail. La présente invention ne vise pas de moteur de ce genre de grande puissance à couplage du bobinage moteur en triangle comme cela est décrit également au US-4 473 338.At US-A 5,015,531, a pump unit is described intended to pump oil. It is a large pump unit power whose coupling of the motor winding is necessarily in triangle, given the power of the engine, and as pointed out the indication, from line 10 of the first column, of the use of soft starters which apply for high power pumps. The pump unit includes means for measuring a parameter which may be the phase difference between voltage and current, although in the example concrete of realization the parameter is only the current. We measure the possibly current the cosine phi every 25 s in the example of production. It is recommended to carry out this sampling every quarter of second at 15 min. The signal representative of the absorbed current is the current going through the feeding phases and not directly into the phase of work. The present invention does not aim at an engine of this kind of great power with coupling of the motor winding in triangle as it is also described in US-4,473,338.

Un groupe motopompe de petite puissance comprend une pompe entraínée par un moteur électrique à courant alternatif, ayant au moins une phase de travail. Le moteur peut être notamment un moteur monophasé ou un moteur triphasé. Le groupe motopompe est destiné à être placé dans une fosse ou dans une cuve et à être mis en route, lorsque c'est nécessaire pour vider la fosse. Lorsque la fosse est presque vide, il est connu de prévoir un capteur de niveau bas, notamment intégré au groupe motopompe, qui donne l'ordre d'arrêter le moteur et donc la pompe, afin que celle-ci ne fonctionne pas à vide. Le flotteur qui est situé à un niveau très bas dans la fosse s'encrasse beaucoup. Bien qu'il soit disposé aussi bas que possible, il subsiste nécessairement, des effluents dans le bas de la fosse, qui entraínent des problèmes de colmatage et d'odeur. En outre, le réglage et l'installation d'un capteur de niveau bas de ce genre, sont compliqués et l'entretien en est fastidieux.A small power pump unit includes a pump driven by an alternating current electric motor, having at minus a work phase. The engine may in particular be an engine single phase or three phase motor. The pump set is intended to be placed in a pit or in a tank and to be started, when it is necessary to empty the pit. When the pit is almost empty, it is known to provide a low level sensor, in particular integrated into the group motor pump, which gives the order to stop the motor and therefore the pump, so that it does not run empty. The float which is located at a very low level in the pit is very dirty. Although it is arranged as low as possible, there necessarily remains, effluents at the bottom of the pit, which cause clogging and odor problems. In addition, the setting and installing a low level sensor like this are complicated and maintenance is tedious.

On a déjà proposé d'arrêter le groupe motopompe par analyse du comportement du moteur en mesurant le déphasage entre la tension et le courant. A l'instant où la pompe commence à aspirer de l'air, le cosinus phi varie. Dès que ce cosinus atteint une valeur prescrite, la pompe est arrêtée. Cette manière de procéder est sensible aux variations de la tension d'alimentation, impose une grande différence de la puissance prise par la pompe en charge et à vide et entraíne des risques de perturbations de l'interprétation de la mesure si les paramètres du groupe motopompe évoluent.We have already proposed to stop the pump unit by analysis of engine behavior by measuring the phase difference between the voltage and current. The moment the pump begins to draw air, the cosine phi varies. As soon as this cosine reaches a prescribed value, the pump is stopped. This procedure is sensitive to variations in the supply voltage, imposes a large difference in the power taken by the pump under load and empty and entails risks of disturbances interpretation of the measurement if the parameters of the pump set evolve.

L'invention remédie à ces inconvénients par un groupe motopompe, qui se dispense d'un capteur de niveau bas et qui élimine du coup toutes les difficultés d'installation, d'entretien, d'odeur et de colmatage du fond de la cuve, et qui permet de vider vraiment complètement la cuve, sans prendre pour autant le risque que la pompe ne soit plus alimentée et travaille à vide, tout en étant peu sensible aux variations de la tension d'alimentation et aux perturbations de la mesure si les paramètres du groupe motopompe se modifient et sans imposer de différence de la puissance prise par la pompe en charge et à vide. On cherche à obtenir un arrêt immédiat, et non pas seulement une régulation à terme, s'il y a danger de réamorçage.The invention remedies these drawbacks by a group motor pump, which dispenses with a low level sensor and which eliminates suddenly all the difficulties of installation, maintenance, odor and clogging from the bottom of the tank, and which allows the tank to be completely emptied, without taking the risk that the pump will no longer be supplied and works without load, while being insensitive to variations in voltage power supply and measurement disturbances if the group parameters motor pump are modified and without imposing a difference in the power taken by the pump under load and vacuum. We're looking for an immediate shutdown, and not only a long term regulation, if there is a danger of re-priming.

L'invention a donc pour objet un groupe motopompe comprenant une pompe entraínée par un moteur électrique à courant alternatif ayant au moins une phase de travail, et un microprocesseur intégré à l'une des entrées duquel est appliquée la tension du secteur d'alimentation, et à une autre entrée duquel est envoyé un signal représentatif du courant absorbé dans la phase de travail du moteur. Suivant l'invention, le microprocesseur comprend des moyens destinés à mesurer le déphasage entre la tension et le courant, des moyens de constatation en continu de la stabilité du déphasage après qu'il s'est stabilisé à une valeur constante, des moyens de mémorisation de la valeur stabilisée constante du déphasage, et des moyens de mise hors tension du moteur, lorsque, après que le déphasage s'est stabilisé, le déphasage prend, pendant une durée prescrite, une valeur supérieure à la valeur stabilisée.The invention therefore relates to a motor pump group comprising a pump driven by an electric current motor alternative with at least one working phase, and an integrated microprocessor to one of the inputs of which the supply sector voltage is applied, and to another input from which a signal representative of the current is sent absorbed in the working phase of the engine. According to the invention, the microprocessor includes means for measuring the phase shift between voltage and current, means of continuous observation of the stability of the phase shift after it has stabilized at a constant value, means for memorizing the constant stabilized value of the phase shift, and means for switching off the engine, when, after the phase shift has stabilized, the phase shift takes, for a prescribed period, a value greater than the stabilized value.

On détermine que le niveau le plus bas, c'est-à-dire que la fosse est complètement vide, est atteint, en analysant d'une manière particulière le comportement électrique du moteur du groupe motopompe. Après une phase transitoire, lors du démarrage de la pompe, dans laquelle le déphasage entre la tension et le courant peut varier beaucoup, ce déphasage est constant lorsque la pompe atteint un régime établi. Mais lorsque la pompe du groupe commence à aspirer de l'air, d'une manière régulière et non pas seulement une simple bulle d'air accidentelle, le déphasage prend une valeur supérieure à la valeur stabilisée. C'est le signe qu'il faut arrêter la pompe, dans la mesure où cette valeur supérieure à la valeur stabilisée est obtenue pendant une certaine durée. Comme l'on mémorise le cosinus de charge en régime établi du groupe motopompe, le calibrage se refait à chaque mise en route du groupe motopompe et prend en compte les évolutions de la pompe, du réseau électrique et du réseau hydraulique (colmatage de tuyauterie, étanchéité du clapet, etc...). Le rapport entre la charge réelle et la puissance du moteur n'intervient plus.We determine that the lowest level, that is to say that the pit is completely empty, is reached, analyzing in a way particular the electrical behavior of the motor of the pump set. After a transient phase, when starting the pump, in which the phase shift between voltage and current can vary a lot, this phase shift is constant when the pump reaches an established speed. But when the pump of the group begins to suck in air, on a regular basis and not only a simple accidental air bubble, the phase shift takes on a value higher than the stabilized value. This is a sign that the pump must be stopped, insofar as this value greater than the stabilized value is obtained for a certain period. As we memorize the cosine of charge in established set of the pump set, calibration is redone each time route of the pump unit and takes into account the evolutions of the pump, the electrical network and the hydraulic network (clogging of piping, sealing of the valve, etc.). The ratio between the actual load and the power no longer intervenes.

On a obtenu de bons résultats lorsque ladite durée prescrite est supérieure à 200 ms et est inférieure à 5 s, avec une préférence pour une durée comprise entre 200 ms et 1 s.Good results have been obtained when said duration prescribed is greater than 200 ms and is less than 5 s, with preference for a duration between 200 ms and 1 s.

Le signal représentatif du courant absorbé est le courant passant seulement dans la phase de travail (bobinage par phase du moteur). On peut prendre ce courant à l'aide d'une chaíne de mesure, d'un transformateur de courant, ou également aux bornes d'un interrupteur de type triac, ce qui est actuellement la solution préférée.The signal representative of the absorbed current is the current passing only in the working phase (winding by motor phase). We can take this current using a measuring chain, a current transformer, or also across a type switch triac, which is currently the preferred solution.

Le groupe motopompe peut comprendre un capteur de niveau haut du liquide à véhiculer, relié à une entrée du microprocesseur, de manière à envoyer un signal de mise en marche du groupe motopompe et des moyens de mesure du déphasage, seulement lorsque le capteur détecte un niveau haut. Le microprocesseur reste ainsi en état de veille et n'entre en action que lorsque le groupe motopompe fonctionne.The pump set can include a high level of the liquid to be conveyed, connected to an input of the microprocessor, way to send a signal to start the pump set and means for measuring the phase shift, only when the sensor detects a high level. The microprocessor thus remains in standby state and does not enter action only when the pump set is operating.

Les moyens de constatation de la stabilité du déphasage peuvent comprendre des moyens de mesure de la constance du courant. Mais de préférence, les moyens de constatation de la stabilité du déphasage comprennent un capteur de niveau intermédiaire du liquide, détectant un niveau compris entre le niveau haut détecté par le capteur de niveau haut et un niveau bas, correspondant à la mise hors tension du moteur. Ces moyens de constatation à capteur de niveau intermédiaire sont relativement simples et très sûrs. Mais suivant un autre mode de réalisation plus simple bien qu'un peu moins sûr, les moyens de constatation de la stabilité du déphasage peuvent comprendre une minuterie qui est déclenchée par le signal du capteur de niveau, et qui, après une durée d'écoulement prescrite, décide que le déphasage est stable. Si en effet, une certaine durée d'écoulement de 4 à 5 s s'est écoulée alors que le déphasage est stable, on peut considérer que l'on n'est plus dans la phase transitoire. Les moyens de constatation fonctionnent en continu et réagissent immédiatement à toute variation instantanée du cosinus phi.Means for determining the stability of the phase shift may include means for measuring the constancy of the current. But preferably, the means of determining the stability of the phase shift include an intermediate liquid level sensor, detecting a level between the high level detected by the high level sensor and a low level, corresponding to switching off the motor. These means of finding with intermediate level sensor are relatively simple and very safe. But according to another simpler embodiment although a slightly less certain, the means of determining the stability of the phase shift may include a timer that is triggered by the signal from the level sensor, and which, after a prescribed flow time, decides that the phase shift is stable. If indeed, a certain flow time of 4 to 5 s has elapsed while the phase shift is stable, we can consider that we are no longer in the transitional phase. The means of observation operate continuously and react immediately to any variation instantaneous cosine phi.

Aux dessins annexés donnés uniquement à titre d'exemple :

  • la figure 1 est une vue schématique en coupe d'un groupe motopompe monté dans une fosse, et
  • la figure 2 est un schéma du circuit électrique du groupe motopompe.
    • In the accompanying drawings given solely by way of example:
  • FIG. 1 is a schematic sectional view of a motor-pump unit mounted in a pit, and
  • Figure 2 is a diagram of the electric circuit of the pump set.

    • Le groupe motopompe représenté à la figure 1 est placé dans une fosse F. Il comprend un moteur qui entraíne une pompe 2 centrifuge, ayant une jupe 3 d'aspiration et une tubulure 4 de refoulement, véhiculant les effluents contenus dans la fosse F à l'extérieur de celle-ci. Le moteur 1 est alimenté en courant, par l'intermédiaire de ligne 5 d'alimentation par le secteur S. Sur le moteur 1 est fixé un capteur 6 de niveau haut, qui est susceptible de détecter le niveau des effluents dans la fosse F. En dessous de ce capteur 6, est monté sur le moteur 1 un capteur 7 de niveau intermédiaire.The pump set shown in Figure 1 is placed in a pit F. It includes a motor which drives a pump 2 centrifugal, having a suction skirt 3 and a discharge pipe 4, conveying the effluents contained in the pit F outside of the latter. The motor 1 is supplied with current, via supply line 5 by sector S. On motor 1 is attached a high level sensor 6, which is likely to detect the level of effluents in pit F. Below of this sensor 6, is mounted on the motor 1 a level sensor 7 intermediate.

    A l'intérieur du compartiment moteur, est logé un microprocesseur 8, relié par une ligne 9 à un circuit 10 de mesure du courant passant dans une phase de travail du moteur 1.Inside the engine compartment is housed a microprocessor 8, connected by a line 9 to a circuit 10 for measuring the current entering a working phase of the engine 1.

    A la figure 2, le moteur est un moteur monophasé, qui comprend une phase principale 11 ou phase de travail et une phase auxiliaire 12, laquelle est en série avec un condensateur 13. Le moteur 1 est commandé par un dispositif 14 de commande. Un signal de tension pris sur l'alimentation 5 vient par une ligne 15 à une borne du microprocesseur 8. Un signal de référence vient par une ligne 16, de l'alimentation S, à une entrée du microprocesseur 8. In FIG. 2, the motor is a single-phase motor, which includes a main phase 11 or work phase and a phase auxiliary 12, which is in series with a capacitor 13. The motor 1 is controlled by a control device 14. A voltage signal taken from the power supply 5 comes via a line 15 to a terminal of the microprocessor 8. A reference signal comes via a line 16, from the power supply S, to an input of the microprocessor 8.

    Le microprocesseur reçoit par une ligne 17, un signal du capteur 6 de niveau haut. Le microprocesseur 8 mesure en continu le déphasage entre le signal de tension appliqué par la ligne 15 et le signal de courant appliqué par la ligne 9.The microprocessor receives by a line 17, a signal from high level sensor 6. The microprocessor 8 continuously measures the phase shift between the voltage signal applied by line 15 and the signal current applied by line 9.

    Le microprocesseur 8 est relié par une ligne 18 à des moyens 19 de mémorisation du déphasage en régime établi. Le dispositif 19 de mémorisation de la valeur stabilisée du déphasage est relié par une ligne 20 à un comparateur 21, lequel est relié, par une ligne 22, à un dispositif 23 de mémorisation de la valeur instantanée du déphasage, valeur fournie par le o microprocesseur 8, par l'intermédiaire d'une ligne 24. La comparaison dans le comparateur 21 entre la valeur stabilisée du déphasage fournie par le dispositif 19 et la valeur instantanée du déphasage fournie par le dispositif 23, est envoyée à un dispositif 25 par l'intermédiaire d'une ligne 26. Ce dispositif 25 détermine si la valeur instantanée du déphasage est supérieure à la valeur stabilisée. Si c'est le cas, il envoie par une ligne 27 à une minuterie 28, un signal correspondant et la minuterie 28 détermine si la durée qui s'écoule pendant que le dispositif 25 émet le signal en question, est supérieure à 200 ms. Si c'est le cas, la minuterie 28 envoie par une ligne 29, un ordre d'arrêt du moteur, à un dispositif 30 marche/arrêt qui le transmet par une ligne 31 au dispositif 14 de commande du moteur. Le microprocesseur 8 est relié au dispositif 30 de marche/arrêt, par une ligne 32 permettant de mettre le moteur 1 sous tension.The microprocessor 8 is connected by a line 18 to means 19 for memorizing the phase shift in steady state. The device 19 for memorizing the stabilized value of the phase shift is connected by a line 20 to a comparator 21, which is connected, by a line 22, to a device 23 for memorizing the instantaneous value of the phase shift, value provided by the o microprocessor 8, via a line 24. The comparison in the comparator 21 between the stabilized value of the phase shift provided by the device 19 and the instantaneous value of the phase shift provided by the device 23, is sent to a device 25 via a line 26. This device 25 determines if the instantaneous value of the phase shift is greater than the value stabilized. If so, it sends a line 27 to a timer 28, a corresponding signal and the timer 28 determines whether the elapsed time while the device 25 transmits the signal in question, is greater than 200 ms. If this is the case, the timer 28 sends by a line 29, an order engine stop, to an on / off device 30 which transmits it by a line 31 to the engine control device 14. The microprocessor 8 is connected to the on / off device 30, by a line 32 enabling the motor 1 energized.

    Tout l'agencement 8 à 30 est constitué de préférence sous la forme d'un logiciel.The entire arrangement 8 to 30 preferably consists in the form of software.

    Le capteur 7 de niveau intermédiaire est relié au microprocesseur 8, par une ligne 33.The intermediate level sensor 7 is connected to the microprocessor 8, by a line 33.

    Le groupe motopompe fonctionne de la manière suivante.The pump set operates as follows.

    Lorsque le niveau de l'eau dans la fosse 1 atteint le niveau haut détecté par le capteur 6, le capteur 6 envoie par la ligne 17 un signal au microprocesseur 8, lequel envoie par la ligne 32, un signal au dispositif 30 de marche/arrêt. Le dispositif 30 donne l'ordre par la ligne 31 au dispositif 14 de commande, de mettre le moteur 1 en route. La pompe 2 fonctionne. Le niveau de l'eau s'abaisse au niveau du capteur 7 intermédiaire. Celui-ci envoie par la ligne 33 un signal au microprocesseur 8 de constatation, du déphasage entre la tension et le courant. Le microprocesseur 8 mesure ou constate alors le déphasage entre la tension et le courant et envoie la valeur stabilisée de ce déphasage au dispositif 19 de mémorisation par la ligne 18. Alors que le groupe motopompe continue à fonctionner et que l'eau continue à s'abaisser dans la fosse F, le microprocesseur 8 envoie en permanence par la ligne 24, au dispositif 23, la valeur instantanée du déphasage entre le courant et la tension fournis par les lignes 9 et 15. Lorsque ce déphasage atteint une valeur supérieure à la valeur stabilisée, le comparateur 21 qui compare les valeurs que lui fournit le dispositif 19 et le dispositif 23, envoie par la ligne 26 un signal au dispositif 25. Le dispositif 25 constate si le déphasage est supérieur à une valeur donnée d'un montant déterminé. Si c'est le cas, il envoie un signal par la ligne 27 à la minuterie 28, laquelle détermine si elle reçoit ce signal pendant une durée prescrite. Si c'est le cas, la minuterie 28 donne l'ordre par la ligne 29 au dispositif 30 de marche/arrêt, d'envoyer un signal 31 au dispositif 14 de commande d'arrêt du moteur 1.When the water level in pit 1 reaches the level high detected by sensor 6, sensor 6 sends a signal to line 17 microprocessor 8, which sends via line 32, a signal to device 30 of On Off. The device 30 gives the order by line 31 to the device 14 of control, to start engine 1. Pump 2 is running. The water level drops at the intermediate sensor 7. This one sends by line 33 a signal to the finding microprocessor 8, from the phase shift between voltage and current. The microprocessor 8 measures or then notes the phase difference between voltage and current and sends the value stabilized from this phase shift to the storage device 19 by line 18. While the pump set continues to operate and the water continues to be lowered into the pit F, the microprocessor 8 sends continuously by line 24, at device 23, the instantaneous value of the phase shift between the current and voltage supplied by lines 9 and 15. When this phase shift reaches a value greater than the stabilized value, the comparator 21 which compare the values provided by device 19 and device 23, sends via line 26 a signal to the device 25. The device 25 ascertains whether the phase shift is greater than a given value by a determined amount. Yes this is the case, it sends a signal through line 27 to timer 28, which determines if it receives this signal for a prescribed time. If that is the case, the timer 28 gives the command via line 29 to the on / off device 30, send a signal 31 to the engine stop control device 14 1.

    Suivant un autre mode de réalisation, le capteur 7 de niveau intermédiaire est remplacé par une minuterie 7 qui est déclenchée par le signal du capteur 6 de niveau haut et qui, après une durée d'écoulement prescrite, décide que le déphasage entre le courant fourni par la ligne 9 et la tension fournie par la ligne 15 est stable.According to another embodiment, the sensor 7 of intermediate level is replaced by a timer 7 which is triggered by the signal from the high level sensor 6 and which, after a flow time prescribed, decides that the phase difference between the current supplied by line 9 and the voltage supplied by line 15 is stable.

    Suivant un autre mode de réalisation, les moyens de constatation de la stabilité du déphasage comprennent des moyens dans le microprocesseur 8 de mesure de la constance du courant fourni par la ligne 9.According to another embodiment, the means of finding the stability of the phase shift include means in the microprocessor 8 for measuring the constancy of the current supplied by line 9.

    Claims (6)

    Groupe motopompe comprenant une pompe (2) entraínée par un moteur (1) électrique à courant alternatif, ayant au moins une phase (11) de travail (bobinage par phase du moteur) et un microprocesseur (8) intégré à l'une des entrées duquel est appliquée la tension du secteur d'alimentation et à une autre entrée duquel est envoyé un signal représentatif du courant absorbé dans la phase (11) de travail du moteur (1), le microprocesseur (8) comprenant des moyens (8) destinés à mesurer le déphasage entre la tension et le courant, caractérisé en ce que le microprocesseur a des moyens (7) de constatation en continu de la stabilité du déphasage, après qu'il s'est stabilisé à une valeur constante, des moyens (19) de mémorisation de la valeur stabilisée constante du déphasage et des moyens (21 à 28) de mise hors tension du moteur (1), lorsque, après que le déphasage s'est stabilisé, le déphasage prend, pendant une durée prescrite, une valeur supérieure à la valeur stabilisée et le signal représentatif du courant absorbé est le courant passant seulement dans la phase (11) de travail.Motor-pump unit comprising a pump (2) driven by an electric AC motor (1), having at least one working phase (11) (winding by motor phase) and a microprocessor (8) integrated into one of the inputs from which the supply sector voltage is applied and to another input from which a signal representative of the current absorbed in the working phase (11) of the motor (1) is sent, the microprocessor (8) comprising means (8) intended measuring the phase shift between voltage and current, characterized in that the microprocessor has means (7) for continuously observing the stability of the phase shift, after it has stabilized at a constant value, means (19 ) memorizing the constant stabilized value of the phase shift and of the means (21 to 28) of switching off the motor (1), when, after the phase shift has stabilized, the phase shift takes, for a prescribed period, a value greater than the value stabilized and the signal representative of the absorbed current is the current flowing only in the working phase (11). Groupe motopompe suivant la revendication 1, caractérisé en ce que le groupe motopompe comprend un capteur (6) de niveau haut du liquide à véhiculer, relié à une entrée du microprocesseur (8), de manière à envoyer un signal de mise en marche du groupe motopompe et des moyens (8) de mesure du déphasage, seulement lorsque le capteur (6) détecte un niveau haut.Motor-pump unit according to claim 1, characterized in that the motor-pump group comprises a sensor (6) for the high level of the liquid to be conveyed, connected to an input of the microprocessor (8), so as to send a signal to start the group. motor pump and means (8) for measuring the phase shift, only when the sensor (6) detects a high level. Groupe motopompe suivant l'une des revendications précédentes, caractérisé en ce que les moyens de constatation de la stabilité du déphasage comprennent des moyens (8) de mesure de la constance du courant.Motor-pump unit according to one of the preceding claims, characterized in that the means for determining the stability of the phase shift comprise means (8) for measuring the constancy of the current. Groupe motopompe suivant l'une des revendications 1 à 3, caractérisé en ce que les moyens de constatation de la stabilité du déphasage comprennent un capteur (7) de niveau intermédiaire du liquide, détectant un niveau compris entre le niveau haut détecté par le capteur (6) de niveau haut et un niveau bas correspondant à la mise hors tension du moteur (1).Motor-pump unit according to one of claims 1 to 3, characterized in that the means for determining the stability of the phase shift comprise a sensor (7) for the intermediate level of the liquid, detecting a level between the high level detected by the sensor ( 6) high level and a low level corresponding to the power off of the motor (1). Groupe motopompe suivant la revendication 3, caractérisé en ce que les moyens de constatation de la stabilité du déphasage comprennent une minuterie (28), qui est déclenchée par le signal du capteur (6) de niveau haut et qui après une durée d'écoulement prescrite décide que le déphasage est stable.Motor-pump unit according to claim 3, characterized in that the means for determining the stability of the phase shift include a timer (28), which is triggered by the signal from the high level sensor (6) and which after a prescribed flow time decides that the phase shift is stable. Groupe motopompe suivant l'une quelconque des revendications précédentes, caractérisé en ce que la durée prescrite est supérieure à 200 ms et inférieure à 5 s.Pump unit according to any one of the preceding claims, characterized in that the prescribed duration is greater than 200 ms and less than 5 s.
    EP02290925A 2001-05-09 2002-04-12 Motor pump unit controlled by electric current analysis Expired - Lifetime EP1256723B1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    DK02290925T DK1256723T3 (en) 2001-05-09 2002-04-12 Motor pump unit whose shutdown is controlled by flow analysis

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0106106 2001-05-09
    FR0106106A FR2824600B1 (en) 2001-05-09 2001-05-09 MOTOR PUMP GROUP WHICH SHUT DOWN BY CURRENT ANALYSIS

    Publications (2)

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    EP1256723A1 true EP1256723A1 (en) 2002-11-13
    EP1256723B1 EP1256723B1 (en) 2005-07-06

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    Family Applications (1)

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    EP02290925A Expired - Lifetime EP1256723B1 (en) 2001-05-09 2002-04-12 Motor pump unit controlled by electric current analysis

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    EP (1) EP1256723B1 (en)
    AT (1) ATE299243T1 (en)
    DE (1) DE60204923T2 (en)
    DK (1) DK1256723T3 (en)
    ES (1) ES2246005T3 (en)
    FR (1) FR2824600B1 (en)
    PT (1) PT1256723E (en)

    Cited By (2)

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    FR2860271A1 (en) * 2003-09-30 2005-04-01 Realisations Electroniques Eur Start-stop control device for pump, has microcontroller that compares measured and recorded effective current and time lag between voltage and current, and stops pump in case of low or high intensity of current to pump
    CN104481891A (en) * 2014-11-27 2015-04-01 新昌县富士精工科技有限公司 Air conditioner draining pump

    Families Citing this family (4)

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    FR2896048B1 (en) * 2006-01-11 2008-07-04 Realisations Electroniques Eur METHOD AND DETECTION SYSTEM FOR AN ELECTRICAL DEVICE
    FR2951267B1 (en) * 2009-10-14 2011-10-28 Peugeot Citroen Automobiles Sa DEVICE FOR DETECTING THE LEVEL OF LIQUID IN A RESERVOIR
    DE102009053322B4 (en) 2009-11-17 2019-10-17 Endo-Technik Wolfgang Griesat Gmbh Device for controlling the flow of a peristaltic pump
    CN203962360U (en) * 2014-07-11 2014-11-26 君禾泵业股份有限公司 The automatic control of pump electronic water level switch

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    US5015151A (en) * 1989-08-21 1991-05-14 Shell Oil Company Motor controller for electrical submersible pumps
    US5833437A (en) * 1996-07-02 1998-11-10 Shurflo Pump Manufacturing Co. Bilge pump

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    US4473338A (en) * 1980-09-15 1984-09-25 Garmong Victor H Controlled well pump and method of analyzing well production
    US5015151A (en) * 1989-08-21 1991-05-14 Shell Oil Company Motor controller for electrical submersible pumps
    US5833437A (en) * 1996-07-02 1998-11-10 Shurflo Pump Manufacturing Co. Bilge pump

    Cited By (3)

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    Publication number Priority date Publication date Assignee Title
    FR2860271A1 (en) * 2003-09-30 2005-04-01 Realisations Electroniques Eur Start-stop control device for pump, has microcontroller that compares measured and recorded effective current and time lag between voltage and current, and stops pump in case of low or high intensity of current to pump
    CN104481891A (en) * 2014-11-27 2015-04-01 新昌县富士精工科技有限公司 Air conditioner draining pump
    CN104481891B (en) * 2014-11-27 2019-01-15 浙江富士精工科技有限公司 Air-conditioning drainage pump

    Also Published As

    Publication number Publication date
    DE60204923D1 (en) 2005-08-11
    FR2824600A1 (en) 2002-11-15
    FR2824600B1 (en) 2004-02-20
    DE60204923T2 (en) 2006-05-24
    EP1256723B1 (en) 2005-07-06
    ES2246005T3 (en) 2006-02-01
    PT1256723E (en) 2005-11-30
    ATE299243T1 (en) 2005-07-15
    DK1256723T3 (en) 2005-10-17

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