EP1082543B1 - Regelung der hubfrequenz einer dosierpumpe - Google Patents
Regelung der hubfrequenz einer dosierpumpe Download PDFInfo
- Publication number
- EP1082543B1 EP1082543B1 EP99953368A EP99953368A EP1082543B1 EP 1082543 B1 EP1082543 B1 EP 1082543B1 EP 99953368 A EP99953368 A EP 99953368A EP 99953368 A EP99953368 A EP 99953368A EP 1082543 B1 EP1082543 B1 EP 1082543B1
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- EP
- European Patent Office
- Prior art keywords
- pump
- frequency
- dosing
- cycle
- stroke
- 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.)
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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
- F04B49/06—Control using electricity
-
- 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
- F04B2201/02—Piston parameters
- F04B2201/0201—Position of the piston
Definitions
- the invention relates to a method for operating an asynchronous motor driven dosing pump with the motor revolutions in from pump suction and Pump pressure cycle of existing pump strokes with a defined stroke frequency converting pump drive, being continuous during a metering phase Pump strokes are carried out.
- the invention further relates to a Dosing pump with asynchronous motor drive and associated with it Frequency converter and thus the control unit in operative connection.
- asynchronous motors are used, which are from a 230 volt or 115 Volt standard operating network with alternating voltage and alternating current with one Mains frequency of 50 or 60 Hertz can be supplied.
- Asynchronous motor of these dosing pumps a mains voltage of 230 volts and the If the mains frequency is 50 or 60 Hertz, the asynchronous motors run at the same time a load-dependent, almost constant speed.
- the engine speed is converted into pump strokes that correspond to each Pump element causing pump suction and pump pressure cycles, for example a piston or a membrane.
- the Gear arrangement predetermined maximum stroke frequency at one of one Asynchronous motor with 230 Volt / 50 or 60 Hertz driven metering pump between 120 and 180 strokes / minute.
- a hub consists of one suction and a pressure stroke of the pump. From a so-called water meter or a standard signal generator or an internal clock generator Asynchronous motor supplied electrical control pulses that the Asynchronous motor one stroke of the pump element - for example Membrane or piston - let it complete. The control pulses are Repeated until the number of times for the desired dosing amount Strokes is executed. From this number of strokes, a dosing phase starts Pump together. A dosing phase is carried out by one of the dosing pumps supplied electrical start pulse triggered.
- Another way to reduce the stroke rate is to use the asynchronous motor to be controlled via a frequency converter, which is one opposite the motor Mains frequency of 50 or 60 Hertz reduced AC or AC frequency supplies.
- a frequency converter which is one opposite the motor Mains frequency of 50 or 60 Hertz reduced AC or AC frequency supplies.
- the result is that the engine speed and thus the stroke frequency of the Pump is decreased.
- With the reduced frequency lengthens due to the lower Engine speed the duration of the suction cycle and pressure cycle and thus the stroke frequency.
- the suction and pressure cycle are still the same length, that is, of the same duration.
- the advantage to the first method is that due to the extended Cycle times now a pause control during which the motor is stopped, is no longer necessary to achieve the desired stroke frequency.
- the pressure stroke is extended compared to a pulse-pause control with the same stroke frequency, so that determine a better distribution of the product to be dosed in the dosing line is.
- the suction cycle is also extended, which means that the The problem of large gaps without dosing product in the dosing line arises.
- a method for operating a metering pump driven by an asynchronous motor is known from GB-A-1 444 117, published in 1976.
- This dosing pump is special designed as a blood pump that works with an artificial heart, that imitate the characteristics of the natural heart as accurately as possible should.
- Such a pump system is used for example for heart-lung machines. If the frequency of the artificial heart increases, the diastole that is supposed to Pump suction cycle, have a shorter period of time compared to systole, which corresponds to the pump pressure cycle. Therefore, during diastole another one Frequency of the pump system clock used as during systole, the The length of time in which each of the two frequencies works depends on the heart rate.
- This document therefore describes a method for operating an asynchronous motor driven metering pump with a motor revolutions in pump strokes
- the pump strokes consist of pump suction and pump pressure cycle and during a metering phase
- Pump strokes are carried out continuously and with each pump stroke to the asynchronous motor an electrical alternating voltage during the pump suction cycle (diastole) with a certain frequency and during the pump pressure cycle (systole) the same electrical AC voltage with a different than the pump suction cycle Frequency is applied There is a short pressure cycle (systole) and a long one Suction cycle (diastole) desired
- the invention is therefore based on the object of providing a solution which is an improvement the dosing behavior when operating dosing pumps with asynchronous motor drive causes.
- this object is achieved in that each Pump stroke to the asynchronous motor during the pump suction cycle an electrical AC voltage with a higher frequency and the same during the pump pressure cycle electrical AC voltage with a lower frequency than the pump suction cycle is created.
- the invention thus creates the possibility of changing the time To design the length or duration of suction stroke and pressure stroke of a stroke differently.
- the higher the frequency applied to the asynchronous motor during the suction cycle is the faster it turns the engine and the shorter the suction stroke.
- the pressure cycle is all the more trained longer, the lower the frequency. It is therefore possible to use the suction cycle compared to the pressure cycle in its length and duration significantly shorten.
- the shortest possible suction cycle and the longest possible are desired Pressure cycle, so that the "metering gaps" disadvantageous in the prior art do not occur more.
- By applying the higher frequency during the suction cycle minimized the length of the suction cycle and thus the time during which no Product is dosed into a dosing line, kept as short as possible.
- To the Suction cycle then follows the pressure cycle. This is in its temporal duration or length by creating a correspondingly lower Alternating voltage frequency to the asynchronous motor can be regulated in such a way that a time duration for one stroke consisting of suction and pressure cycle, which corresponds to the desired stroke frequency.
- the pressure cycle is created by applying the lower frequency in its temporal extension as long as by the specified stroke frequency possible, i.e. maximized in time.
- the basic innovation of the invention is thus that Pump suction cycle and pump pressure cycle in relation to their duration or Length can be regulated differently and are also different. In contrast to the state of the art, at which suction and pressure cycles each have the same length are trained.
- the invention sees implementation of the method according to the invention in another Training before that by means of position sensors, the positions of a Pump suction and the pump pressure process of the metering pump Pump element of the pump drive in its front, the beginning of a Pump suction stroke indicating dead center and in its rear, the beginning of a Pump pressure stroke indicating dead center can be determined and by these Position sensors in the respective dead center emitted electrical position pulses be the electrical triggering to the respective frequency change Control pulses are processed.
- the invention therefore provides an embodiment furthermore that the control pulses are fed to a frequency converter from which the asynchronous motor is supplied with the respective frequency becomes.
- the invention therefore further provides that the front and rear dead center based on the rotor position of the asynchronous motor or Eccentric position of a gear can be determined.
- a dosing phase i.e. one to that of the dosing pump dosing volume corresponding number of pump strokes
- the dosing phase triggering electrical start impulse when positioning the pump element in its front or rear dead center is fed to the control unit.
- the pump or stroke frequency is expediently controlled in such a way that during a dosing phase a volume corresponding to the volume to be dosed Number of pump strokes is carried out.
- the invention further provides that pump strokes with a stroke frequency between 10 and 180 strokes / minute.
- the invention provides that the individual Suction cycles are formed for the same length during a dosing phase, and for other that the individual pressure cycles during a dosing phase of the same length be formed. This has the advantage of a uniform mechanical Stress on the dosing pump.
- the invention provides for the regulation of different dosing capacities advantageous development that the length of a suction stroke at maximum Stroke frequency or 100% dosing performance is specified and the length of a Pressure cycle as to achieve the current metering rate or Stroke frequency necessary complementary value is set or adjusted becomes.
- the Asynchronous motor supplied frequency is set and regardless of the the current dosing rate remains constant, the length of each Pressure cycle depending on the current dosing rate and associated stroke frequency by supplying a corresponding frequency adjusted to the asynchronous motor.
- the inventive method can be technically relative easy to implement on a dosing pump.
- This metering pump has the Advantages listed above for the method also.
- the Frequency converter in the rear the beginning of a pump pressure cycle representing dead center of the suction and pressure process of the metering pump effecting pump element on the lower and in each case in the front, the dead center representing the start of a pump suction stroke to the higher one Frequency changes, as provided by the invention in an embodiment.
- control unit electrical control impulses supplied to the frequency converter correspond to the respective Trigger frequency changes, which the invention also provides.
- control unit the front and rear dead center of the Detecting pump element and when positioning the pump element in electrical position pulses at the respective dead center of the control unit Feeding position sensors are assigned, which is the invention in further training provides.
- the invention then provides that the Control unit the position pulses to the respective control pulses processed.
- a particularly inexpensive way to record the front and rear Dead center is that the position sensors are front and rear dead center of the pump element based on the rotor position of the asynchronous motor or Detect eccentric position of a transmission, which the invention also provides.
- the invention provides for triggering a metering phase that one of the Control unit supplied electrical start pulse triggers a dosing phase.
- the invention provides that the individual Suction cycles are of equal length during a dosing phase, and other that the individual pressure cycle during a dosing phase of the same length are trained.
- the dosing pump has in its individual configurations and developments the same advantages as stated above for the method.
- FIG. 1 shows a simplified and schematic block diagram representation a pump element 1, which has a mechanical and gear connection 2 is in operative connection with an asynchronous motor 3.
- Gear connection 2 can be an eccentric gear.
- the Asynchronous motor 3 has an output of 40 watts or more.
- the reciprocating pump element 1 leads a pump suction stroke 16 during its forward movement and during its forward movement a pump pressure cycle 17 in a not shown Dosing pump, which has the elements shown in Figure 1.
- the pump element 1 can be, for example, a membrane or act as a piston, which by corresponding back and forth movement triggers or executes the suction and pressure cycles 16, 17 of the metering pump.
- a frequency converter 4 With the interposition of a frequency converter 4, the asynchronous motor 3 with an electrical 230 volt or 115 volt standard operating network 5 connected.
- the standard operating network 5 supplies a 230 volt or 115 volt AC voltage with a frequency of 50 Hertz or 60 Hertz.
- this connection is shown as lines 6 and 7.
- the mechanical and Gearbox connection 2 is designed so that at 230 volts / 50/60 Hertz from Asynchronous motor 3 completed speed in 125 strokes / minute of Pump element 1 are converted, one stroke each a suction and includes a print stroke.
- the frequency converter 4 now opens the Possibility of the 5 provided by the standard electrical operating network Frequency to regulate and to vary and accordingly changed frequency values to provide the asynchronous motor 3 via the line 7.
- the mechanical and gear connection 2 represents a pump drive that due to its mechanical design, the engine revolutions of the Asynchronous motor 3 in back and forth movements of the pump element 1 with converted defined stroke frequency.
- the stroke frequency is therefore only through Varying engine revolutions, i.e. the engine speed changeable.
- FIG. 1 also shows a control unit 8, which is connected via a line 9 is also in operative connection with the standard operating network 5.
- the frequency converter 4 electrical Control pulses 10 supplied.
- 1 shows sensors 11, which, as shown by the double arrow 12, the rotor position of the rotor of the Detect asynchronous motor 3 or the eccentric position of the eccentric gear or detect and the rotor position or the eccentric position of the Display control unit 8 as electrical position pulses 13 or to them to transfer.
- the position sensors 11 of the control unit 8 supplied electrical position pulses 13 are in the control unit 8 to the frequency converter 4 and the respective Frequency change triggering trigger pulses 10 processed or implemented.
- This start pulse 14 can be from an external Pulse generator, such as a water meter, from one Standard signal generator or an internal clock generator of the control unit 8 come.
- the asynchronous motor 3 and the mechanical and Transmission connection 2 are regulated and designed such that at the end of a each metering phase the rotor of the asynchronous motor 3 or the eccentric Eccentric takes a position in which the pump element 1 is at the end of its pressure stroke movement, that is, at its front dead center 18, is located.
- the pump element 1 At the end of his suction stroke movement or at the beginning of his Pressure cycle movement is the pump element 1 in its rear Dead center 19, which is also a specific rotor position of the Asynchronous motor or an eccentric position of the gearbox corresponds.
- the front and rear dead center position of the pump element 1 corresponding rotor positions of the asynchronous motor 3 or Eccentric positions of the transmission are detected by the sensors 11 and as electrical position pulses 13 supplied to the control unit 8.
- each one of suction and pressure stroke 16, 17 include existing pump stroke, existing dosing phase is thereby triggered that the control unit 8 a corresponding electrical Start pulse 14 is supplied.
- the control unit 8 then regulates the others Execution of the dosing phase.
- Asynchronous motor 3 and the pump element 1 is in its front Dead center 18.
- the asynchronous motor 3 now rotates at a high engine speed until the pump element 1 has reached its rear dead center 19 and thus performed a suction stroke 15 is. Reaching the rear dead center 19 is via the corresponding Rotor position of the asynchrome gate 3 or the eccentric gear in turn from the sensors 11 detected and as an electrical position pulse 13 to the Control unit 8 forwarded.
- This now sends a new one Control pulse 10 to the frequency converter 4, whereupon this now a 230 or 115 volt operating voltage with a frequency below 50/60 Hertz feeds the asynchronous motor 3.
- Due to the lower frequency the Asynchronous motor 3 now during when it reaches the rear dead center 19th beginning and until reaching the front dead center 18 of the Pump element 1 extending pressure cycle 17 of the metering pump with a lower speed.
- the control unit 8 controlled controlled frequency converter 4 during the suction cycle 16 a feed the asynchronous motor 3 as high as possible in order to keep the time To keep the duration of the suction cycle 16 as short as possible.
- the frequency converter 4 the Asynchronous motor 3 supply a lower frequency, which is thereafter dimensioned that the pressure stroke 17 to one of suction and pressure stroke 16, 17th existing stroke frequency leads to that during a dosing phase Dosing the desired volume corresponding number of dosing cycles 15 corresponds to.
- the duration of a suction cycle 16, as well as the duration of all suction cycles 16 to be carried out during a metering phase, during which is not dosed is thus minimized.
- the time duration a pressure cycle 17 and all to be carried out during a metering phase Pressure cycles 17 is set in accordance with the desired stroke frequency regulated and maximized, so that during the pressure cycles 17 a Frame of the specified stroke frequency as slow as possible, continuously sets uniform dosage.
- FIGS. 2a), 2b) and 3a), 3b The chronological sequence and duration of suction and pressure cycle 16, 17 and their Comparison to the prior art from FIGS. 2a), 2b) and 3a), 3b).
- Figures 2a), 2b) and 3a), 3b) are in the upper
- the partial diagram shows schematically the engine speed n over time t and in the lower one Partial image of the metering volume flow V plotted over time t.
- Figures 2a) and 2b) give the dosing behavior of a dosing pump when complete Utilization of the dosing performance possible with the dosing pump, i.e. at 100% dosing performance, again.
- Figures 3a) and 3b) give this Dosing behavior with half capacity utilization, i.e. at 50% Dosing performance, the dosing pump again.
- a metering cycle 15 consists of one suction cycle 16 and one pressure cycle 17, each with a stroke the dosing pump. While in the prior art according to FIG.
- the asynchronous motor 3 from the beginning of the first suction cycle 16 during total number of cycles 15 or the entire dosing phase with one constant engine speed n is operated, with the result that alternating on a suction stroke phase 16 follows an equally long pressure stroke phase 17 starts in the inventive method and in the inventive Dosing pump a dosing phase with a suction cycle 16, during which on the asynchronous motor 3 has a frequency of more than 50/60 Hertz.
- the Characteristic curves for the engine speed n are shown in FIGS. 2a) and 2b) provided with the reference numeral 20.
- the suction cycles 16 each begin on front dead center 18 of the pump element 1 and end at the rear Dead center 19.
- Dosing cycle 15 also has a pause 22 during which the Asynchronous motor 3 stands around the stroke or cycle frequency To be able to adapt the dosing phase to the desired dosing volume.
- the pause time is 22 50% of the total Time of a respective dosing cycle 15, so that here a 50% dosing rate the metering pump is set.
- Such a pause 22 is at inventive method and the metering pump according to the invention not more necessary because here the pressure cycle 17 of each cycle 15 through corresponding reduction in engine speed, that is, by a accordingly reduced frequency of the applied to the asynchronous motor 3 Operating voltage, is extended in its temporal extent so that it over the time corresponding to the corresponding stroke or cycle frequency extends.
- this is metered during a pressure cycle 17 Dosing volume in the inventive method and the inventive Dosing pump same as in the prior art, which by the respective equally large area below the dosing volume characteristic 21 can be seen.
- Dosing pump according to the invention here is compared to the state of the Technology additionally in that the motor 3 rotates continuously and thereby the mechanical and transmission connection 2 is treated much more gently because they do not have power surges when repetitively starting and stopping the Motors is exposed. It also follows that when method according to the invention and the metering pump according to the invention none Break time occurs more, a continuous dosage with a clear improved distribution of the product to be dosed in the dosing line. It there are no more "dosing gaps" worth mentioning.
- the method according to the invention and the metering pump according to the invention are in their mechanical and control devices 2, 3, 4, 8 designed in such a way that pump strokes with a stroke frequency between 10 and 180 Strokes per minute are executable.
- the stroke frequency should be used constant during a dosing phase consisting of several dosing cycles 15 his.
- the duration of a suction cycle 16 is preferably by the Control unit 8 selectable adjustable, maximum stroke frequency, i.e. the Maximum number of strokes that can be carried out during a unit of time at 100% Dosing performance, determines and remains constant during a dosing phase.
- the duration of a print cycle 17 is found to be the current one Dosing capacity or stroke frequency required complementary value. Also the The duration of each pressure cycle 17 is constant during a metering phase.
- the number of strokes at a desired dosing rate is determined by that the duration of each pressure cycle 17 to the respective metering rate or adapted the corresponding number of strokes, i.e. is extended accordingly, so that thereby the corresponding dosing performance reduced Number of strokes performed.
- This regulation is from the Control unit 8 and / or the frequency converter 4, which the asynchronous motor 3 each during the suction and pressure cycles 16, 17 a to achieve the required stroke frequency and thus to achieve the required duration of suction and pressure cycle 16, 17 supplies the necessary frequency.
- This procedure can be seen from a comparison of Figures 2 b) and 3 b). While the suction cycles 16 are each of the same length, the Print cycle 17 in Fig. 3 b) extended so that the 50% there Dosing performance sets a dosing cycle 15 which extends over time corresponds to two dosing cycles 15 of FIG. 2 b).
- Liquids of all kinds can be dosed with the dosing pump.
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Description
Diese zeigt in
- Fig. 1
- in vereinfachter und schematischer Blockschaltbilddarstellung Bestandteile einer erfindungsgemäßen Dosierpumpe zur Durchführung des erfindungsgemäßen Verfahrens,
- Fig. 2 a) und 2b)
- den Verlauf von Dosierzyklen beim Stand der Technik (Fig. 2 a)) und beim erfindungsgemäßen Verfahren (Fig. 2 b)) bei maximaler Dosierleistung und in
- Figur 3a) und 3 b)
- den zeitlichen Verlauf von Dosierzyklen beim Stand der Technik (Fig. 3 a)) und beim erfindungsgemäßen Verfahren (Fig. 3 b)) bei 50 %iger Dosierleistung.
Claims (25)
- Verfahren zum Betrieb einer von einem Asynchronmotor (3) angetriebenen Dosierpumpe mit die Motorumdrehungen in aus Pumpensaug- (16) und Pumpendrucktakt (17) bestehende Pumpenhübe definierter Hubfrequenz umwandelndem Pumpenantrieb, wobei während einer Dosierphase kontinuierlich Pumpenhübe ausgeführt werden,
dadurch gekennzeichnet, daß bei jedem Pumpenhub an den Asynchronmotor (3) während des Pumpensaugtaktes (16) eine elektrische Wechselspannung mit höherer Frequenz und während des Pumpendrucktaktes (17) dieselbe elekrische Wechselspannung mit gegenüber dem Pumpensaugtakt (16) niedrigerer Frequenz angelegt wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß als höhere Frequenz eine Frequenz oberhalb der Frequenz üblicher 230 V oder 115 V Standardbetriebsnetze und als niedrigere Frequenz eine Frequenz unterhalb der Frequenz üblicher 230 V oder 115 V Standardbetriebsnetze angelegt wird. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß ein Frequenzwechsel jeweils zu Beginn von Pumpensaug- (16) und Pumpendrucktakt (17) durchgeführt wird. - Verfahren nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet, daß mittels Positionssensoren (11) die Stellungen eines den Pumpensaug-(16) und den Pumpendruckvorgang (17) der Dosierpumpe bewirkenden Pumpenelementes (1) des Pumpenantriebes in seinem vorderen, den Beginn eines Pumpensaugtaktes (16) anzeigenden Totpunkt (18) und in seinem hinteren, den Beginn eines Pumpendrucktaktes (17) anzeigenden Totpunkt (19) ermittelt werden und von diesen Positionssensoren (11) im jeweiligen Totpunkt (18, 19) elektrische Positionsimpulse (13) ausgesandt werden, die zu den jeweiligen Frequenzwechsel auslösenden elektrischen Ansteuerungsimpulsen (10) verarbeitet werden. - Verfahren nach Anspruch 4,
dadurch gekennzeichnet, daß die Positionsimpulse (13) einer Steuerungseinheit (8) zugeführt und von dieser zu den den jeweiligen Frequenzwechsel auslösenden Ansteuerungsimpulsen (10) verarbeitet werden. - Verfahren nach Anspruch 4 oder 5,
dadurch gekennzeichnet, daß die Ansteuerungsimpulse (10) einem Frequenzumrichter (4) zugeführt werden, von welchem der Asynchronmotor (3) mit der jeweiligen Frequenz versorgt wird. - Verfahren nach einem der Ansprüche 4 bis 6
dadurch gekennzeichnet, daß vorderer und hinterer Totpunkt (18, 19) anhand der Rotorstellung des Asynchronmotors (3) oder der Exzenterstellung eines Getriebes ermittelt werden. - Verfahren nach einem der Ansprüche 4 bis 7
dadurch gekennzeichnet, daß ein die Dosierphase auslösender elektrischer Startimpuls (14) bei Positionierung des Pumpenelementes (1) in seinem vorderen oder hinteren Totpunkt (18, 19) der Steuerungseinheit (8) zugeführt wird. - Verfahren nach einem der vorrangehenden Ansprüche,
dadurch gekennzeichnet, daß während einer Dosierphase eine dem zu dosierenden Volumen entsprechende Anzahl an Pumpenhüben durchgeführt wird. - Verfahren nach einem der vorrangehenden Ansprüche,
dadurch gekennzeichnet, daß Pumpenhübe mit einer Hubfrequenz zwischen 10 und 180 Hüben/Minute ausgeführt werden. - Verfahren nach einem der vorrangehenden Ansprüche,
dadurch gekennzeichnet, daß die Hubfrequenz während einer Dosierphase konstant ist. - Verfahren nach einem der vorrangehenden Ansprüche,
dadurch gekennzeichnet, daß die einzelnen Saugtakte (16) während einer Dosierphase gleich lang ausgebildet werden. - Verfahren nach einem der vorrangehenden Ansprüche,
dadurch gekennzeichnet, daß die einzelnen Drucktakte (17) während einer Dosierphase gleich lang ausgebildet werden. - Verfahren nach einem der vorrangehenden Ansprüche,
dadurch gekennzeichnet, daß die Länge eines Saugtaktes (16) bei maximaler Hubfrequenz bzw. 100 % Dosierleistung vorgegeben wird und die Länge eines Drucktaktes (17) als zur Erreichung der jeweils aktuellen Dosierleistung bzw. Hubfrequenz notwendiger Komplementärwert eingestellt oder eingeregelt wird. - Dosierpumpe mit Asynchronmotorantrieb (2,3) sowie diesem zugeordnetem Frequenzumrichter (4) und damit in Wirkverbindung stehender Steuerungseinheit (8),
dadurch gekennzeichnet, daß bei konstanter Betriebsnetzspannung der Frequenzumrichter (4) dem Asynchronmotor (3) bei jedem Pumpenhub während eines Pumpensaugtaktes (16) Wechselstrom höherer Frequenz und während eines Pumpendrucktaktes (17) Wechselstrom mit gegenüber dem Pumpensaugtakt (16) niedrigerer Frequenz zuführt. - Dosierpumpe nach Anspruch 15,
dadurch gekennzeichnet, daß die höhere Frequenz oberhalb der Frequenz üblicher 230 Volt oder 115 Volt Standardbetriebsnetze (5) und die niedrigere Frequenz unterhalb der Frequenz üblicher 230 Volt oder 115 Volt Standardbetriebsnetze (5) liegt. - Dosierpumpe nach Anspruch 15 oder 16,
dadurch gekennzeichnet, daß der Frequenzumrichter (4) jeweils im hinteren, den Beginn eines Pumpendrucktaktes (17) darstellenden Totpunkt (19) eines den Saug- und Druckvorgang der Dosierpumpe bewirkenden Pumpenelementes (1) auf die niedrigere und jeweils in dessen vorderem, den Beginn eines Pumpensaugtaktes (16) darstellenden Totpunkt (18) auf die höhere Frequenz wechselt. - Dosierpumpe nach einem der Ansprüche 15 bis 17,
dadurch gekennzeichnet, daß von der Steuerungseinheit (8) dem Frequenzumrichter (4) zugeführte elektrische Aussteuerungsimpulse (10) den jeweiligen Frequenzwechsel auslösen. - Dosierpumpe nach Anspruch 17 oder 18,
dadurch gekennzeichnet, daß der Steuerungseinheit (8) den vorderen und hinteren Totpunkt (18, 19) des Pumpenelementes (1) detektierende und bei Positionierung des Pumpenelementes (1) in seinem jeweiligen Totpunkt (18, 19) der Steuerungseinheit (8) elektrische Positionsimpulse (13) zuführende Positionssensoren (11) zugeordnet sind. - Dosierpumpe nach Anspruch 19,
dadurch gekennzeichnet, daß die Steuerungseinheit (8) die Positionsimpulse (13) zu den jeweiligen Ansteuerungsimpulsen (10) verarbeitet. - Dosierpumpe nach Anspruch 19 oder 20,
dadurch gekennzeichnet, daß die Positionssensoren (11) vorderen und hinteren Totpunkt (18, 19) des Pumpenelementes (1) anhand der Rotorstellung des Asynchronmotors (3) oder der Exzenterstellung eines Getriebes detektieren. - Dosierpumpe nach einem der Ansprüche 15 bis 21,
dadurch gekennzeichnet, daß ein der Steuerungseinheit (8) zugeführter elektrischer Startimpuls (14) eine Dosierphase auslöst. - Dosierpumpe nach einem der Ansprüche 15 bis 22,
dadurch gekennzeichnet, daß die einzelnen Saugtakte (16) während einer Dosierphase gleich lang ausgebildet werden. - Dosierpumpe nach einem der Ansprüche 15 bis 23,
dadurch gekennzeichnet, daß die einzelnen Drucktakte (17) während einer Dosierphase gleich lang ausgebildet sind. - Dosierpumpe nach einem der Ansprüche 15 bis 24,
dadurch gekennzeichnet, daß die Länge eines jeden Saugtaktes (16) auf die bei 100 % Dosierleistung maximal durchführbare Anzahl an Pumpenhüben ausgerichtet ist und die Länge eines jeden Drucktaktes (17) sich als zur Erreichung der jeweils aktuellen Dosierleistung notwendiger Komplementärwert ergibt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823156 | 1998-05-23 | ||
DE19823156A DE19823156A1 (de) | 1998-05-23 | 1998-05-23 | Dosierpumpe |
PCT/EP1999/003332 WO1999061795A1 (de) | 1998-05-23 | 1999-05-14 | Regelung der hubfrequenz einer dosierpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1082543A1 EP1082543A1 (de) | 2001-03-14 |
EP1082543B1 true EP1082543B1 (de) | 2002-02-20 |
Family
ID=7868758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99953368A Revoked EP1082543B1 (de) | 1998-05-23 | 1999-05-14 | Regelung der hubfrequenz einer dosierpumpe |
Country Status (5)
Country | Link |
---|---|
US (1) | US6457944B1 (de) |
EP (1) | EP1082543B1 (de) |
AT (1) | ATE213523T1 (de) |
DE (2) | DE19823156A1 (de) |
WO (1) | WO1999061795A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10035834A1 (de) † | 2000-07-21 | 2002-02-07 | Grundfos As | Dosierpumpe mit einem Elektromotor |
US7087036B2 (en) * | 2002-05-24 | 2006-08-08 | Baxter International Inc. | Fail safe system for operating medical fluid valves |
DE10322868A1 (de) * | 2003-05-21 | 2004-12-16 | Lang Apparatebau Gmbh | Verfahren zur Regelung einer von einem elektromotorisch angetriebenen Exzenter betätigten Membran- oder Kolbenpumpe |
ITRM20040371A1 (it) * | 2004-07-21 | 2004-10-21 | Seko Italia S P A | Dispositivo di pilotaggio di un elettromagnete, in particolare per l'azionamento di pompe. |
US20090123298A1 (en) * | 2007-11-08 | 2009-05-14 | Tetra Laval Holdings & Finance, S.A. | Method to prolong lifetime of diaphragm pump |
EP2248935B1 (de) * | 2009-05-04 | 2011-08-10 | Coprecitec, S.L. | Haushaltswasch- oder Spülmaschine und Steuerung hierfür |
SE1550049A1 (sv) * | 2015-01-21 | 2016-07-22 | Osakeyhtiö Skf Ab | System, method & computer program product |
US9813000B2 (en) | 2015-12-18 | 2017-11-07 | Sirius Instrumentation And Controls Inc. | Method and system for enhanced accuracy of chemical injection pumps |
DE102016108118A1 (de) * | 2016-01-18 | 2017-07-20 | Sera Gmbh | Dosierpumpe und Verfahren zum Betreiben einer Dosierpumpe |
CN107387653B (zh) * | 2017-08-02 | 2023-04-18 | 宜昌船舶柴油机有限公司 | 船用二次力矩消振器及控制方法 |
DE102022114956A1 (de) | 2022-06-14 | 2023-12-14 | B.Braun Avitum Ag | Vorrichtung zur Herstellung von Dialysierflüssigkeit |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1773796B2 (de) * | 1968-07-08 | 1971-11-25 | Farbenfabriken Bayer AG, 5090 Le verkusen | Verfahren und vorrichtung zum foerdern und dosieren von gasen fuer gasanalysen |
GB1444117A (en) * | 1973-11-20 | 1976-07-28 | Madec Ges Fuer Klinische Spezi | Pump system |
US4145161A (en) * | 1977-08-10 | 1979-03-20 | Standard Oil Company (Indiana) | Speed control |
JPS5888482A (ja) * | 1981-11-20 | 1983-05-26 | Nikkiso Co Ltd | サブマ−ジブルポンプの運転方式 |
DE3276590D1 (en) * | 1982-01-15 | 1987-07-23 | Polaroid Corp | Pressure equalization pumping system |
IT1202723B (it) * | 1987-03-31 | 1989-02-09 | Massimo Sanna | Sistema e dispositivo per far erogare quantita' prefissate di liquido da una pompa dosatrice in regime di portata variabile |
JP3111790B2 (ja) * | 1994-02-03 | 2000-11-27 | 株式会社日立製作所 | 流量精密制御ポンプ |
US5673732A (en) * | 1995-07-11 | 1997-10-07 | Fe Petro Inc. | Variable speed pump-motor assembly for fuel dispensing system |
JPH09137781A (ja) * | 1995-11-15 | 1997-05-27 | Matsushita Refrig Co Ltd | 振動型圧縮機 |
DE19630384A1 (de) * | 1996-07-29 | 1998-04-23 | Becker Kg Gebr | Verfahren zur Steuerung oder Regelung eines Aggregats und Frequenzumwandler |
DE19654084C1 (de) * | 1996-12-23 | 1998-04-23 | Lang Apparatebau Gmbh | Dosierpumpe und Verfahren zur Erhöhung der Dosiergenauigkeit |
-
1998
- 1998-05-23 DE DE19823156A patent/DE19823156A1/de not_active Ceased
-
1999
- 1999-05-14 DE DE59900880T patent/DE59900880D1/de not_active Expired - Fee Related
- 1999-05-14 AT AT99953368T patent/ATE213523T1/de not_active IP Right Cessation
- 1999-05-14 WO PCT/EP1999/003332 patent/WO1999061795A1/de not_active Application Discontinuation
- 1999-05-14 US US09/700,936 patent/US6457944B1/en not_active Expired - Lifetime
- 1999-05-14 EP EP99953368A patent/EP1082543B1/de not_active Revoked
Also Published As
Publication number | Publication date |
---|---|
DE19823156A1 (de) | 1999-12-02 |
ATE213523T1 (de) | 2002-03-15 |
EP1082543A1 (de) | 2001-03-14 |
WO1999061795A1 (de) | 1999-12-02 |
DE59900880D1 (de) | 2002-03-28 |
US6457944B1 (en) | 2002-10-01 |
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