EP1598555B1 - Motor pump unit having means to limit the pressure of the hydraulic fluid which is being pumped by said pump - Google Patents
Motor pump unit having means to limit the pressure of the hydraulic fluid which is being pumped by said pump Download PDFInfo
- Publication number
- EP1598555B1 EP1598555B1 EP20050291034 EP05291034A EP1598555B1 EP 1598555 B1 EP1598555 B1 EP 1598555B1 EP 20050291034 EP20050291034 EP 20050291034 EP 05291034 A EP05291034 A EP 05291034A EP 1598555 B1 EP1598555 B1 EP 1598555B1
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- EP
- European Patent Office
- Prior art keywords
- motor
- lim
- pump
- limiting
- current
- 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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- 239000012530 fluid Substances 0.000 title claims description 4
- 238000012360 testing method Methods 0.000 claims description 2
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 11
- 238000013475 authorization Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005534 acoustic noise Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
- F04B2203/0201—Current
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/06—Pressure in a (hydraulic) circuit
Definitions
- the invention relates to an electro-pump unit system, of the type comprising an electric motor, a hydraulic pump driven by the electric motor and intended to provide hydraulic power, and means for limiting the pressure of the hydraulic fluid in the circuit. hydraulic.
- valve indicated schematically at 9 of the limiter 8 opens a bypass lane 10 which is connected to the tank 11 of the liquid intended to be sucked by the pump 3.
- the figure 1 illustrates at 12 the electric power supply battery of the electric pump unit 1. The figure still shows that the electric pump unit 1 receives the information on the speed of rotation of the steering wheel, denoted V VO and the information on the vehicle speed V VEH .
- the use of the mechanical pressure limiter 8 in the known system has many major disadvantages. Indeed, it causes an additional cost, is cumbersome, can cause states of instability, generates acoustic noise related to its opening and, by constituting a specific mechanical part, decreases the reliability of the system
- EP 0 574 623 mentions an electro-pump system equipped with pressure regulating means using a multitude of sensors to define an optimal pressure (pump speed, pressure, temperature) generating additional costs.
- the object of the present invention is to propose an electro-pump group system which overcomes the drawbacks inherent in the known system.
- the system according to the invention is characterized in that the pressure limiting means are implemented as electronic management means, the limitation of the pressure being effected by setting the maximum limiting current I LIM. to send to the drive motor of the pump.
- FIG 2 which gives the block diagram of a steering assistance system of a motor vehicle, using an electropump according to the invention, it is found that the latter differs from the electropump known in the state of the technique, represented on the figure 1 by the fact that the pressure limiter is removed and that the function performed in the system known by the limiter is accomplished by means electronic pressure limiters which are part of the calculator / controller 13 'and are indicated by the shaded area 15 of the rack representing this calculator.
- the pump converts the speed of rotation of the electric motor 3 into hydraulic flow in the hydraulic circuit, namely the cylinder 4.
- the resisting torque exerted on the engine corresponds to the sum of the resistance torque due to the pressure in the hydraulic circuit and the resisting torque specific to the pump, the resisting torque linked to the motor can be considered negligible. Therefore, limiting the pressure in the hydraulic circuit is equivalent to limiting the torque provided by the engine. Thus, it has been found possible within the scope of the invention to obtain the limitation of the pressure in the hydraulic circuit by limiting the maximum current to be sent to the electric motor 2 for driving the pump 3.
- the maximum limiting current I LIM is determined according to three parameters, namely the supply voltage U BAT supplied by the battery, the temperature T MOS of the active electronic elements, namely transistors. used and the temperature T CA of the carrier board electronic components calculator.
- the values of the limit current I LIM vary according to these parameters and are taken in a calibration table made from tests.
- each group of three battery voltage and temperature values corresponds to a limit current value I LIM .
- This interdependence is represented on the figure 4 in 19a in the form of a three-dimensional diagram on the three axes of which are reported respectively the U BAT temperatures, T MOS active element temperatures and T ca card temperatures, next to the table of values.
- the system according to the invention further provides a torque management in avoidance, that is to say the system allows an exceeding of the limit current I LIM to have a better response of the system to avoid an obstacle by a quick maneuver.
- the avoidance current I EV is obtained from the limit current I LIM by multiplication according to a correction coefficient, as shown in the diagram.
- fig 4 box 19b representing on the ordinate axis the current I and on the abscissa axis the speed V, the vehicle speed V VEH .
- the computer 13 comprises a microprocessor 17 which is intended to establish by calculation the engine speed reference C RPM , that is to say the engine speed reference, from the vehicle speed V VEH and of the speed of rotation of the steering wheel V VO and, also by calculation, the limit current I LIM , from the vehicle speed V VEH and the values representative of the battery voltage U BAT and the temperature values T mos of the active elements of electronic devices and the temperature T ca of the card of this device.
- the calculation operations of the engine speed setpoint C RPM and the limit current I LIM are symbolized in the figure by boxes marked 18 and 19.
- the values of the battery voltage and of the temperature are applied to the inputs of a circuit of formatting 20 which adapts the level of these values to the level allowable for the microprocessor 17 which performs, before using them for calculating the current I LIM in 21 a software formatting 21.
- the microprocessor 17 calculates the motor control C M. This calculation is symbolized by box 22.
- the engine control C M is sent to the engine after having been shaped by a circuit 23 of the computer.
- the calculation of the motor control C M carried out by the microprocessor 17, again takes into account the current I M consumed by the motor, the value of which has been shaped by the circuit 24 of the computer and software formatted in FIG. by the microprocessor.
- the figure 4 shows in more detail the implementation of the operations just described.
- the result of the calculation engine speed calculation performed at 18 is subjected to a decision logic symbolized by the box 27, which is intended to let the setpoint C RPM for a servo operation of speed, materialized by block 28 or to prohibit this passage, according to a rotation authorization signal S AR of binary nature, which is the result of an assessment of the speed of rotation of the motor V RPM , provided for provide protection for the pump.
- a rotation authorization signal S AR of binary nature which is the result of an assessment of the speed of rotation of the motor V RPM , provided for provide protection for the pump.
- the speed control box 28 thus receives at an input a signal which is either the engine speed set point C RPM equal to zero, as a function of the rotation authorization signal S AR applied to box 27.
- the box speed control 28 receives at a second input a signal representative of the speed of rotation of the motor, noted V RPM and produces at its output a signal S PWM1 to ensure the nullity of the error between the two input signals , namely the setpoint C RPM and the speed signal V RPM .
- the signal is advantageously a pulse width modulated signal.
- the control is effected by applying the output signal S PWM1 to a first input of a bit comparator 31 which receives at a second input the calculated current value I LIM and a third input the information of the motor current I M. From the comparison operation results a signal S PWM2 , which is either identical to the signal S PWM1 or equal to zero, the signal is applied to a motor power control 32 applied to the motor 2.
- the control loop formed by the speed control unit 28, the comparator 31, the motor power control 32 and the motor 2 is designed to ensure that the motor rotation speed V RPM is slaved to the engine speed set point C RPM which has been calculated in 22.
- the comparator 31 passes the signal S PWM1 to the motor control 32.
- the comparator prohibits the passage of the signal S PWM1 , which has the consequence that the signal S PWM2 becomes zero and the power control of the motor decreases until the current I M consumed by the motor becomes lower than current I LIM . This situation causes the comparator to allow again the passage of the signal S PWM1 to the motor control 32.
- the invention provides a pump protection function in the case where the rotational speed of the motor 2 is too low to ensure proper operation of the pump.
- This protection function is illustrated by the diagram inside box 28 of the figure 4 represents the speed of rotation V RPM as a function of time t.
- V min the speed of rotation
- the engine is stopped after a time t1 and is then restarted after a time t2, the stopping and starting times t1 and t2 being fixed but configurable.
- the times t1 and t2 are modulated according to the accelerations and decelerations of the engine. In this case, the modulation laws of t1 and t2 are parameterizable.
- the protection function 30 of the pump applies to the decision logic 27 of the figure 4 , the aforementioned rotation authorization signal S AR , which is of a binary nature and causes the decision logic to allow the passage of the engine speed setpoint C RPM to the speed control box 28, as has been described above, this passage of the signal is forbidden.
- the figure 5 illustrates another version of implementation of the strategy of the system according to the invention, which consists in replacing the comparator 29 of the figure 4 by a scalar controller 34, the control 32 of the motor thus becoming a scalar control which limits the torque supplied to the motor 2 by controlling the value of the phase currents and by slaving the phase difference between the field created by the power supply Bri and that Ba created by the magnets at a constant value of ⁇ ⁇ / 2.
- This control is known in particular for synchronous machines in which the stator is generally provided with a three-phase winding, powered by a voltage and current system and creating in the gap a rotating induction field Bri.
- the Bri field tends to attract the rotor which is provided with permanent magnets producing an induction field Ba.
- the induction field tends to align, giving rise to an electromagnetic torque.
- the figure 6 shows another version of implementation of the invention which provides a vector control of the engine and uses instead of the scalar controller 34 of the figure 5 a vector controller 35.
- the vector control makes it possible to limit the torque supplied to the motor by directly controlling the current vector I s (t) .
- I s (t) the current vector
- all the information relating to the three currents of the three phases of the motor can be combined into a single mathematical quantity, namely the current phasor which is a spatial quantity.
- the advantage of using a spatial phaser rather than processing scalar magnitudes is that the three information pertaining to three phase currents of the motor are combined into one complex size.
- the phasor represented by the vector current I in the diagram given inside the vector controller box 35 can be decomposed, in a two-phase space system equivalent to a three-phase scalar system, according to a direct stator current component I D carried on the X-axis and a quadrature stator current component I Q carried on the ordinate axis.
- the advantage lies mainly in handling only two quantities.
- the invention is usable in all cases where an electric pump unit is used which is intended to provide hydraulic power while providing protection against possible overpressures in the hydraulic circuit, for example in braking systems and for suspension of a motor vehicle or forklift trucks or the like.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Power Steering Mechanism (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
Description
L'invention concerne un système de groupe électro-pompe, du type comprenant un moteur électrique, une pompe hydraulique entraînée par le moteur électrique et destinée à fournir de la puissance hydraulique, et des moyens de limitation de la pression du fluide hydraulique dans le circuit hydraulique.The invention relates to an electro-pump unit system, of the type comprising an electric motor, a hydraulic pump driven by the electric motor and intended to provide hydraulic power, and means for limiting the pressure of the hydraulic fluid in the circuit. hydraulic.
Dans les systèmes d'électro-pompe de ce type, qui sont connus, la fonction de la limitation de la pression est accomplie par un limiteur de pression mécanique réalisé sous forme d'une soupape de sécurité pourvue d'un clapet de décharge à ressort à précontrainte réglable en fonction de la pression maximale admissible pour une application donnée. Comme on le voit sur la
L'utilisation du limiteur de pression mécanique 8 dans le système connu présente de nombreux inconvénients majeurs. En effet, il provoque un surcoût, est encombrant, peut provoquer des états d'instabilité, engendre des bruits acoustiques liés à son ouverture et, en constituant une pièce mécanique spécifique, diminue la fiabilité du systèmeThe use of the mechanical pressure limiter 8 in the known system has many major disadvantages. Indeed, it causes an additional cost, is cumbersome, can cause states of instability, generates acoustic noise related to its opening and, by constituting a specific mechanical part, decreases the reliability of the system
Le document
La présente invention a pour but de proposer un système de groupe électro-pompe, qui pallie les inconvénients inhérents au système connu.The object of the present invention is to propose an electro-pump group system which overcomes the drawbacks inherent in the known system.
Pour atteindre ce but, le système selon l'invention est caractérisé en ce que les moyens de limitation de la pression sont réalisés sous forme de moyens de gestion électronique, la limitation de la pression étant effectuée par l'établissement du courant maximal limite ILIM à envoyer au moteur d'entraînement de la pompe.To achieve this goal, the system according to the invention is characterized in that the pressure limiting means are implemented as electronic management means, the limitation of the pressure being effected by setting the maximum limiting current I LIM. to send to the drive motor of the pump.
L'invention sera mieux comprise, et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement dans la description explicative qui va suivre faite en référence aux dessins schématiques annexés donnés uniquement à titre d'exemple illustrant deux modes de réalisation de l'invention et dans lesquels :
- la
figure 1 est une vue synoptique en forme d'un schéma bloc d'un système de groupe électro-pompe selon l'état de la technique ; - la
figure 2 est une vue synoptique, similaire à lafigure 1 , d'un système d'électro-pompe selon l'invention ; - la
figure 3 montre le schéma synoptique du calculateur contrôleur 13' du groupe électro-pompe selon lafigure 2 ; - la
figure 4 est un schéma synoptique illustrant la mise en oeuvre des opérations effectuées par le calculateur 13' de lafigure 3 ; - les
figures 5 et6 sont des schémas synoptiques similaires à lafigure 4 et illustrent deux autres versions de mise en oeuvre du calculateur/contrôleur 13' d'un groupe électro-pompe selon l'invention.
- the
figure 1 is a schematic view in the form of a block diagram of an electro-pump system according to the state of the art; - the
figure 2 is a synoptic view, similar to thefigure 1 of an electro-pump system according to the invention; - the
figure 3 shows the block diagram of the control computer 13 'of the electric pump group according to thefigure 2 ; - the
figure 4 is a block diagram illustrating the implementation of the operations performed by the computer 13 'of thefigure 3 ; - the
figures 5 and6 are synoptic diagrams similar to thefigure 4 and illustrate two others implementation versions of the computer / controller 13 'of an electric pump unit according to the invention.
En se référant à la
Il est à noter que, dans un ensemble de groupes électro-pompe, la pompe transforme la vitesse de rotation du moteur électrique 3 en débit hydraulique dans le circuit hydraulique, à savoir le vérin 4. Le couple résistant exercé sur le moteur correspond à la somme du couple résistant du à la pression dans le circuit hydraulique et du couple résistant propre à la pompe, le couple résistant lié au moteur pouvant être considéré comme négligeable. Par conséquent, limiter la pression dans le circuit hydraulique est équivalent à limiter le couple fourni par le moteur. Ainsi il s'est avéré possible dans le cadre de l'invention, d'obtenir la limitation de la pression dans le circuit hydraulique par une limitation du courant maximal à envoyer au moteur électrique 2 d'entraînement de la pompe 3.It should be noted that, in a set of electro-pump units, the pump converts the speed of rotation of the
Selon une caractéristique de l'invention, le courant maximal limite ILIM est déterminé en fonction de trois paramètres, à savoir de la tension d'alimentation UBAT fournie par la batterie, la température TMOS des éléments électroniques actifs, à savoir des transistors utilisés et la température TCA de la carte porteuse des composants électroniques calculateur. Les valeurs du courant limite ILIM varient en fonction de ces paramètres et sont prises dans une table de calibration réalisée à partir d'essais. Ainsi à chaque groupe de trois valeurs de tension de batterie et de température correspond une valeur de courant limite ILIM. Cette inter-dépendance est représentée sur la
On décrira ci-après, en se référant aux
Comme le montre le schéma du groupe électro-pompe 1, de la
Après le calcul de la consigne régime moteur CRPM et du courant ILIM, le micro-processeur 17 calcule la commande moteur CM. Ce calcul est symbolisé par la case 22. La commande moteur CM est envoyé au moteur après avoir été mise en forme par un circuit 23 du calculateur. Le calcul de la commande moteur CM, effectué par le micro-processeur 17, prend encore en compte le courant IM consommé par le moteur dont la valeur a été mise en forme par le circuit 24 du calculateur et mise en forme logicielle en 25 par le micro-processeur.After calculating the motor speed set point C RPM and the current I LIM , the
La
La case d'asservissement de vitesse 28 reçoit donc à une entrée un signal qui est soit la consigne de régime moteur CRPM soit égale à zéro, en fonction du signal d'autorisation en rotation SAR appliqué à la case 27. La case d'asservissement de vitesse 28 reçoit à une deuxième entrée un signal représentatif de la vitesse de rotation du moteur, noté VRPM et produit à sa sortie un signal SPWM1 permettant d'assurer la nullité de l'erreur entre les deux signaux d'entrée, à savoir la consigne CRPM et le signal de vitesse VRPM. Le signal est avantageusement un signal à modulation de largeur d'impulsion. L'asservissement est effectué en appliquant le signal de sortie SPWM1 à une première entrée d'un comparateur binaire 31 qui reçoit à une deuxième entrée la valeur de courant calculée ILIM et à une troisième entrée l'information du courant moteur IM. De l'opération de comparaison résulte un signal SPWM2, qui est soit identique au signal SPWM1 soit égal à zéro, le signal est appliqué à une commande de puissance moteur 32 appliquée au moteur 2.The
La boucle d'asservissement formée par le casier d'asservissement de vitesse 28, du comparateur 31, de la commande puissance moteur 32 et du moteur 2 est conçue pour assurer que la vitesse de rotation moteur VRPM soit asservie à la consigne régime moteur CRPM qui a été calculée en 22. Tant que le courant moteur consommé IM est inférieur à la valeur de courant limite ILIM, le comparateur 31 laisse passer le signal SPWM1 à la commande moteur 32. Lorsque le courant IM est supérieur à la valeur du courant limite ILIM, le comparateur interdit le passage du signal SPWM1, ce qui a pour conséquence que le signal SPWM2 devienne zéro et la commande de puissance du moteur diminue jusqu'à ce que le courant IM consommé par le moteur devienne inférieur au courant ILIM. Cette situation amène le comparateur à permettre à nouveau le passage du signal SPWM1 à la commande moteur 32.The control loop formed by the
Comme il a été énoncé plus haut, l'invention prévoit une fonction de protection de pompe dans le cas où la vitesse de rotation du moteur 2 est trop faible pour assurer un fonctionnement correct de la pompe. Cette fonction de protection est illustrée par le diagramme qui figure à l'intérieur de la case 28 de la
La
La
Le phaseur représenté par le courant vectoriel I dans le schéma donné à l'intérieur de la case contrôleur vectoriel 35 peut être décomposé, dans un système biphasé spatial équivalent à un système triphasé scalaire, selon une composante de courant statorique directe ID portée sur l'axe des abscisses et une composante de courant statorique en quadrature IQ portée sur l'axe des ordonnées. L'avantage réside principalement dans la manipulation de deux grandeurs seulement.The phasor represented by the vector current I in the diagram given inside the
Bien entendu l'invention qui vient d'être décrite en se référant aux figures, dans son application à un véhicule automobile pour fournir une assistance à la direction de celui-ci n'est pas limitée à cette application. Cette dernière n'a été indiquée qu'à titre d'exemple.Of course the invention which has just been described with reference to the figures, in its application to a motor vehicle to provide assistance to the steering thereof is not limited to this application. The latter has been indicated only as an example.
En effet, l'invention est utilisable dans tous les cas où on utilise un groupe électro-pompe qui est destiné à fournir une puissance hydraulique tout en prévoyant une protection contre des éventuelles surpressions dans le circuit hydraulique, par exemple dans des systèmes de freinage et de suspension de véhicule automobile ou de chariots élévateurs ou analogue.Indeed, the invention is usable in all cases where an electric pump unit is used which is intended to provide hydraulic power while providing protection against possible overpressures in the hydraulic circuit, for example in braking systems and for suspension of a motor vehicle or forklift trucks or the like.
Claims (9)
- An electropump unit system, of the type comprising an electric motor, a hydraulic pump driven by the electric motor and intended to provide hydraulic power to a hydraulic device, and means for limiting the pressure of the hydraulic fluid sent by the pump into the hydraulic circuit, embodied as electronic management means (13', 17, 15), the limitation of the pressure being performed by establishing the limiting maximum current ILIM to be sent to the motor (2) driving the pump (3).
- The system according to claim 1, of the type comprising a computer for managing the operation of the system, characterized in that the computer (13') is adapted in order to provide the aforementioned electronic management.
- The system according to claim 2, characterized in that the computer (13') includes means for computing the limiting maximum current ILIM to be sent to the motor (2) for driving the pump (3).
- The system according to claim 3, characterized in that the means for computing the limiting maximum current ILIM are adapted so as to provide an increase in the limiting maximum current by multiplication by a predetermined coefficient for avoiding an obstacle during the driving of the vehicle for example.
- The system according to claim 4, characterized in that the electronic pressure-limiting means are adapted in order to compare the motor current IM with the aforementioned limiting maximum current ILIM and to provide a control preventing the motor current IM from exceeding the limiting current ILIM.
- The system according to claim 5, characterized in that the electronic management means are adapted in order to prevent the motor (2) from operating at low speeds of rotation which may cause inappropriate operation of the pump (3).
- The system according to any of claims 1 to 6, characterized in that it is intended to equip a motor vehicle and to provide assistance in the steering of the latter via a hydraulic actuator device.
- The system according to any of claims 1 to 6, characterized in that it comprises a calibration table established from tests, determining a correspondence between a group of three values of battery voltage and of temperature (UBAT, TMOS, TCA) and a limiting current value (ILIM) and in that the limiting maximum current value ILIM to be sent to the motor stems from the calibration table.
- The system according to claim 8, characterized in that the group of three values integrated into the calibration table are a value UBAT of a supply voltage provided by the battery (UBAT), a value of the temperature (TMOS) of the active electronic components and a value of the temperature (TCA) of the card bearing the computer's electronic components, respectively.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0405533 | 2004-05-21 | ||
FR0405533A FR2870570B1 (en) | 2004-05-21 | 2004-05-21 | ELECTRO-PUMP GROUP SYSTEM PROVIDED WITH MEANS FOR LIMITING THE HYDRAULIC FLUID PRESSURE SUPPLIED BY THE PUMP |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1598555A1 EP1598555A1 (en) | 2005-11-23 |
EP1598555B1 true EP1598555B1 (en) | 2008-02-20 |
Family
ID=34942283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20050291034 Active EP1598555B1 (en) | 2004-05-21 | 2005-05-13 | Motor pump unit having means to limit the pressure of the hydraulic fluid which is being pumped by said pump |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1598555B1 (en) |
DE (1) | DE602005004829T2 (en) |
FR (1) | FR2870570B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3789612A1 (en) | 2019-09-06 | 2021-03-10 | Weber-Hydraulik GmbH | Portable, battery-powered hydraulic unit for hydraulic rescue equipment |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5938901B2 (en) * | 2011-12-28 | 2016-06-22 | 株式会社ジェイテクト | Motor control device and electric pump unit |
CN112401692B (en) * | 2019-08-23 | 2023-04-14 | 广东美的生活电器制造有限公司 | Food processing device, control method and control system thereof, and readable storage medium |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3819490A1 (en) * | 1988-06-08 | 1989-12-14 | Siemens Ag | Pump system of a hydraulic actuator, e.g. for a motor vehicle |
US5141402A (en) * | 1991-01-29 | 1992-08-25 | Vickers, Incorporated | Power transmission |
JPH0544758U (en) * | 1991-11-20 | 1993-06-15 | 光洋精工株式会社 | Electric pump type power steering device |
EP0718496A3 (en) * | 1994-12-19 | 1998-12-02 | Lockheed Martin Corporation | A variable assist electro-hydraulic system |
CA2213457C (en) * | 1995-03-14 | 2005-05-24 | The Boeing Company | Aircraft hydraulic pump control system |
-
2004
- 2004-05-21 FR FR0405533A patent/FR2870570B1/en not_active Expired - Lifetime
-
2005
- 2005-05-13 DE DE200560004829 patent/DE602005004829T2/en active Active
- 2005-05-13 EP EP20050291034 patent/EP1598555B1/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3789612A1 (en) | 2019-09-06 | 2021-03-10 | Weber-Hydraulik GmbH | Portable, battery-powered hydraulic unit for hydraulic rescue equipment |
Also Published As
Publication number | Publication date |
---|---|
DE602005004829D1 (en) | 2008-04-03 |
FR2870570A1 (en) | 2005-11-25 |
DE602005004829T2 (en) | 2009-03-12 |
EP1598555A1 (en) | 2005-11-23 |
FR2870570B1 (en) | 2006-08-18 |
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