• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for controlling a pump arrangement comprising a pump and a control unit, wherein the pump comprises a motor and the control unit is arranged to drive said motor, the motor during operation being associated with an operating parameter from which the engine torque can be derived, said operating parameter has a normal value Punder normal operation of the engine in a first direction. The method is the steps of driving the motor in the first direction by means of the control unit, if a real value P of the operating parameter exceeds a predetermined clogging limit P, where 1.05P, stops the motor, by means of the control unit driving the motor in a second direction opposite to a second direction in advance determined flushing time TR, and if the absolute amount of the real value P of the operating parameter during the flushing time TR exceeds the absolute amount of a first release limit P, where | PLi I ^ l, lP, stop the engine, otherwise stop the engine after said flushing time TR.Publication image: Figure 2
    公开号:SE1450673A1
    申请号:SE1450673
    申请日:2014-06-03
    公开日:2015-12-04
    发明作者:Alexander Fullemann
    申请人:Xylem Ip Man S À R L；
    IPC主号:
    专利说明:

    Stop the pump motor abruptly, mainly due to requirements to avoid so-called pressure strokes in the pipe system downstream of the pump, but also due to the large torque and the large amount of movement that the pump impeller has during normal operation.
    If the motor is stopped abruptly, pressure will inevitably occur where the kinetic energy and moment of inertia of the liquid in the pipelines downstream of the pump creates vibrations that risk destroying the pipelines and other structural elements. engine speed.
    A direct consequence of the lack of intelligence in the cleaning method is that the standard cleaning sequence used, which is adequate in strained operating conditions as described above, drastically increases the pump load when a large and / or hard object enters the pump hydraulic unit and wedges, operating license has arisen. By harmful operating condition is meant ie. when an operating condition that is detrimental to the pump arrangement will immediately or in the short term cause the pump and / or control unit to break down. When the control unit, for example in the form of a frequency converter (VFD), performs said ramping down when a large and / or hard object is wedged and mechanically brakes the impeller, the extended, controlled ramping causes the motor to force the impeller to rotate and the object is wedged harder / drive - more difficult. This in turn means that the pump's impeller, shaft, motor, etc. or control unit will be overworked and damaged.
    To prevent damage to the pump and / or control unit, various safety systems / protection equipment are currently used, such as motor protection, fuses, etc., which are arranged to protect the equipment and trip before the equipment is damaged. Common to the harmful operating conditions described above, ie. if the safety system trips and / or if the pump arrangement breaks down, service personnel are required to make an emergency call and rectify the fault / clogging. These calls are expensive in themselves and in addition a stationary pump is costly for the plant owner. Brief Description of the Objects of the Invention The present invention aims to obviate the above-mentioned disadvantages and shortcomings of prior art cleaning methods and to provide an improved method of controlling a pump arrangement. A basic object of the invention is to provide an improved method for controlling a pump arrangement of initially defined type, the arrangement itself being able to solve. a further object of the present invention is to provide a method of controlling a pump arrangement which quite completely prevents service personnel from having to perform emergency calls.
    Brief description of the features of the invention According to the invention, at least the basic object is achieved by means of the initially defined method having the features defined in the independent claims. Preferred embodiments of the present invention are further defined in the dependent claims.
    According to the present invention there is provided a method for controlling a pump arrangement of initially defined type, which is characterized in that it comprises the steps of: - by means of the control unit driving the motor in a first direction, - if a real value P of the operating parameter exceeds a predetermined clogging limit P1, where P12 l, O5 * PN, stop the motor, - by means of the control unit drive the motor in a second direction opposite to the second direction during a predetermined flushing time TR, and - if the absolute amount of the operating value P during the flushing time TR exceeds the absolute amount of a first | PL1 | 2 l, l * P :, otherwise stop the engine after said flushing time TR. release limit Pm, where stopping the engine, Thus, the present invention is based on the insight that by breaking the drive in the first direction at a lower torque than the torque where the drive in the second direction is broken, i.e. have greater torque available for loosening the wedged material than the torque with which the material was wedged, the pump arrangement is spared and the number of emergency service calls can be more or less completely eliminated.
    According to a preferred embodiment of the present invention, the method after the step comprises: - if a real value P of the operating parameter exceeds a predetermined clogging limit P1, where P12 1, O5 * PN, stops the engine, also the steps of: - by means of the control unit driving the motor in the first direction during a predetermined control time TK, - if the real value PR of the operating parameter PR during the control time TK exceeds a false alarm control limit PF, where PF S P1, stop the motor.
    In this way a false alarm function is obtained, after which unnecessary running of the pump backwards can be avoided.
    According to a preferred embodiment of the present invention, the method after the step comprises: - if the absolute amount of the real value P of the operating parameter exceeds the absolute amount of a first release limit Pm, where IPMI 2 l, l * P1, stop the motor, also the steps of: - by the control unit drive the motor in the first direction for a predetermined flushing time TR, - if the real value P of the operating parameter exceeds a second release limit PM, where PM 2 P1 and Pm SO, 95 * | PM |, stop the motor.
    In this way, the pump arrangement, when unsuccessful in the first reverse pull-off attempt, attempts to loosen the wedged material by means of a forward pull-out attempt with an available torque greater than the available torque in normal forward operation but less than available torque in reverse pull-off. According to a preferred embodiment of the present invention, the operating parameter is the power consumption of the motor.
    Additional advantages and features of the invention will be apparent from the other dependent claims and from the following detailed description of preferred embodiments.
    Brief Description of the Drawings A more complete understanding of the above and other features and advantages of the present invention will become apparent from the following detailed description of preferred embodiments when taken in conjunction with the accompanying drawings, in which: Fig. 1 is a schematic illustration; of a pumping station comprising a pump arrangement, Fig. 2 is a flow chart showing a first embodiment of the method according to the invention, Fig. 3 is a flow chart showing a second embodiment of the method according to the invention, Fig. 4 is a flow chart showing a third embodiment of the method according to the invention, Fig. 5 is a diagram which schematically shows how the power consumption of the pump changes over time, in a successful cleaning / detachment in the other direction, Fig. 6 is a diagram which schematically shows how the power consumption of the pump changes over time , in the event of a successful detachment in the other direction after several unsuccessful detachment attempts, and Fig. 7 is a diagram schematically showing how the power consumption of the pump changes over time, in the event of a false clogging.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Figure 1 shows a pumping station, generally designated 1, comprising at least one speed-controlled pump 2, arranged to pump liquid from an in the pumping station 1 in an active, usually two submersible pumps. input pump pit 3 to an outlet pipe 4 and further away from the pump station 1.
    Furthermore, the pump station 1 comprises in a conventional manner at least one level device 5 arranged to determine the liquid level in the pump station 1. It should be pointed out that the level device 5 can be a single device which is operatively connected to an external control unit 6, be operatively connected to , be built into said at least one speed-controlled pump 2, etc. Said at least one speed-controlled pump 2 is preferably operatively connected to the external control unit 6 in order to allow control of the speed of the pump, alternatively said at least one speed-controlled pump 2 may comprise a built-in control unit (not shown). Hereinafter, the term control unit 6 will be used regardless of its physical location.
    The pump 2 and the control unit 6 together form at least a part of a pump arrangement, wherein the pump 2 comprises an electric motor 7 which is arranged to be driven by said control unit 6, and an impeller 8 which is connected to the motor 7 via a drive shaft 9 on conventional way. Preferably, the pump and most preferably a pump ratio are in operation. the wheel 8 an open impeller, wheels for a suction cap / insert ring at the inlet of the pump, which is axially displaceable in the pump 2. The wording "speed-controlled" covers all conceivable ways of changing a pump's speed, or more precisely the engine 7 speed / operating speed, primarily refers to current supply frequency control by means of a frequency converter (Variable Frequency Drive), which is built into a pump or which is external, and which constitutes an example of said control unit 6, the speed being proportional to the current supply frequency during normal operation. However, it also refers to internally or externally controlled supply voltage regulation, etc. Thus, at an overall level of the invention, it is not central how the pump's operating speed is regulated, only that the pump's 2 speeds can be regulated / controlled.
    The method according to the invention is directed to controlling a pump arrangement which comprises a pump 2 with a motor 7 and a control unit 6 which is arranged to control said motor 7, for the purpose of obtaining efficient cleaning of the pump at clogging . Pumping station I shall in this context be regarded as a delimited plant to which incoming liquid arrives. The pumping station shall be considered regardless of the type of liquid and regardless of where the liquid from and from which outgoing liquid is pumped. with respect to the present invention, comes and where the liquid is to be pumped. In the case where the pump station comprises a plurality of pumps 2, suitable alternation can take place between them, which, however, is not handled here.
    Furthermore, pump 2 is started and stopped during normal operation according to known methods and is not handled herein.
    Figures 2 show a preferred embodiment of a method, generally designated 10, for controlling a pump arrangement comprising a pump 2 and a control unit 6. It should be pointed out that the method 10 according to the invention can be expanded with one or more sub-methods, and / or run parallel / sequential with other control methods.
    The method 10 according to the invention for controlling a pump arrangement is in practice a cleaning method for a pump which is completely or partially clogged, i.e. a foreign material has entered the pump 2 and wedged the impeller 8.
    The degree of clogging and / or the nature of the clogging causes a load on the motor 7 of the pump 2 and indicates an operating condition of the pump arrangement. Thus, at each individual time, when the pump 2 is in an active state and the motor 7 is driven in a first direction by the control unit 6, it is associated with a degree of load corresponding to an operating state of the pump arrangement. The pump arrangement also comprises means for, intermittently or continuously, monitoring of at least one operating parameter from which the torque of the motor 7 can be derived, either by direct measurement or by derivation from measuring another operating parameter / quantity.
    Said operating parameter P preferably consists of power consumption or torque, but other operating parameters such as power consumption are also conceivable. In reality, the load factor of the motor 7 will change, which means that torque and operating speed / speed change, when the hydraulic unit of the pump 2 is completely or partially clogged. A direct effect of this is that the power consumption, power consumption, etc. of the pump change to a corresponding extent, whereby the torque of the motor 7 can be derived from, for example, the current consumption of the motor. Preferably, the actual power consumption of the pump 2, or more particularly the motor 7, is monitored when the pump 2 is in the above-mentioned active state, and hereinafter the invention will be described with this as a starting point. However, it should be understood that the invention is not limited to measuring power consumption as an operating parameter. Said operating parameter has a normal value PN during normal operation of the motor 7 in a first direction. By the first direction is meant that the impeller 8 is driven forward, i.e. pumps liquid out via the outlet pipe 4.
    Now, the inventive method 10 in its most basic form will be described with reference to Figure 2.
    The method 10 assumes that the pump 2 is in its active state and the motor 7 is driven in a first direction by the control unit 6. In this context and during normal operation, said first direction is the direction which causes the impeller 8 to transport liquid from the pump pit 3 via the outlet pipe 4, i.e. the motor 7 is driven in the forward direction. At start of pump 2, ie. starting from an inactive state of the pump 2, the control unit 6 provides a controlled, for example linear, ramp-up of the actual operating speed / speed F of the motor 7 from 0 to an operating speed FN for normal operation, which for example constitutes approximately 75-85% of the motor 7 so-called Motor 7 maximum speed is the speed of the motor 7 (ie
    The normal operating speed FN can be, for example, a constant maximum speed Fww. if the pump 2 were directly connected to a power network, it usually has a current supply frequency of 5OHz or 60Hz). or a value varying over time, can for example be a manually set value or an automatically optimized value based on instantaneous energy consumption, etc. This also means that the normal value PN of the operating parameter can be constant or varying over time in line with the current status of the normal operating speed FN . It should also be noted that different conditions of the pumped liquid carry different loads on a pump 2 at unchanged normal operating speed FN, which means that the normal value PN of the operating parameter also depends on the load to which the pump 2 in the specific application is subjected. , i.e. different pumping stations receive liquid of different nature. Furthermore, the liquid that arrives at one and the same pumping station can have different conditions at different times of the day.
    When the pump 2 is in said active state, a real value P of said at least one operating parameter is determined / monitored, in the described embodiment real power consumption is determined. The actual power consumption varies during normal operation around a nominal value of the power consumption due to the fact that solid material found in the pumped liquid enters, affects and is transported through the hydraulic unit of the pump 2 and thus momentarily affects the motor 7 load / torque.
    When monitoring said real value P of said at least one operating parameter, it can be determined whether an externally applied force acts on the motor 7 to such an extent that an operating condition harmful to the pump arrangement is initiated, which is true when the motor 7 load / torque exceeds one for pump arrangement 7 harmful level. Damaged operating condition refers to an operating condition which will immediately or in the short term cause the pump 2 and / or the control unit 6 to be overloaded and break if the motor 7 is kept unchanged, or alternatively the safety system / protection equipment will solve out. A harmful operating condition is imminent when a large and / or hard object enters the hydraulic unit of the pump 2 and is wedged between the impeller 8 and the impeller or suction cap / insert ring.
    The method 10, comprises the step of determining whether the real value P of when the motor 7 is driven in the first direction, the operating parameter exceeds a predetermined clogging point where Pï is greater than or equal to a factor OITIP> PI limit Limit Ph 1.05 times the normal value of the operating parameter PN. stop the engine 7 otherwise normal operation. Preferably, the ratio between the clogging limit P1 of the operating parameter and the normal value PN of the operating parameter is: PI 2 l, 1 * PN, and most preferably P1 2 l, 2 * PN.
    It should be pointed out that due to the fact that the normal value PN of the operating parameter can vary during operation, the clogging limit P1 of the operating parameter P1 will also vary, however, the above-mentioned mutual relations between them remain.
    By the term stop the motor is meant to perform a state change from the active state of the pump 2 to an inactive state of the pump 2. The step of stopping the motor 7 in this context preferably includes that the control unit 6 abruptly breaks the drive of the control unit immediately after clogging. the motor 7 in said first direction.
    The feature of abruptly breaking the drive is realized by setting the operating speed FN of the motor 7 equal to zero in the control unit 6, i.e. no ramping down of the motor 7 speed takes place, or by setting the operating speed FN of the motor 7 equal to zero by disengaging the motor 7, the that is, the motor 7 is made completely de-energized. This means that the foreign object that has entered the hydraulic unit of the pump 2 and is wedged, does not wedge harder / harder.
    After clogging is detected and the engine 7 is stopped, the method 10 begins a cleaning sequence. After the motor 7 has been stopped, the step is carried out by means of the control unit 6 to drive the motor 7 in a second direction opposite to the first direction during a predetermined flushing time TR. By the term drive the motor 7 in a second direction is meant that the motor 7 is driven in the rearward direction. During the flushing time TR, the pump arrangement tries to flush back what has been wedged into the pump pit 3.
    During the flushing time TR and driving the motor 7 in the other direction, the control unit 6 tries to generate a cleaning speed backwards FW of the motor 7. The absolute amount of the cleaning speed backwards E is preferably in the range 75-85% the method step of determining the absolute amount of operation of the motor 7 max speed Fww. During the purge time TR, the actual value P of the parameter exceeds the absolute amount of a first release limit Pm, where the absolute amount of the first release limit Pm of the operating parameter is greater than or equal to a factor of 1.1 times the clogging of the operating parameter- | Pn | that the wedged material cannot be detached and the PI limit. Om | P | > stop the engine 7, which means flushing out in the first release attempt backwards. Om 10 15 20 25 30 35 11 IPI <| PL1 | and then return to normal operation, stop the motor 7 after said flushing time TF, which means that the wedged material is flushed out into the pump pit 3 during the first pull-back attempt backwards. Preferably, the ratio between the first release limit PM of the operating parameter and the clogging limit of the operating parameter is PF: | Pm | Z 2 * PF, and most preferably IPMI 2 3 * PF After the step of stopping the motor 7 after it is determined that the real value P of the operating parameter exceeds the clogging limit P1, the method preferably also comprises the step of keeping the pump 2 in the inactive state a predetermined state waiting time Tv. In other words, the pump 2 is kept inactive for a waiting time Tv before the first pull-back attempt is started backwards, or before a false alarm check which will be described below.
    After the step of stopping the motor 7 after the rinsing time TF, the method preferably also comprises the step of keeping the pump 2 in an inactive state for a predetermined waiting time Tv. In other words, the pump 2 is kept inactive for a waiting time of TV before normal operation is resumed.
    Reference is now made to Figure 3 in which an addition to the method according to Figure 2 in the form of a false alarm control is described, other parts of the method 10 remain unchanged and are not described below.
    After the step of stopping the motor 7 after it is determined that the real value P of the operating parameter exceeds the clogging limit P1, the method comprises the step of driving the motor 7 in the first direction by means of the control unit 6 for a predetermined control time TK. During the control time TK, the method performs the step of determining whether the real value P of the operating parameter exceeds a false alarm control limit PF, where the false alarm control limit PF of the operating parameter is less than or equal to the operating parameter's clogging limit PF. The false alarm check is performed one or more times. If P> PF stop the engine 7, which means that it is not a false alarm but a blockage is confirmed. During the false alarm check, the material that caused the clogging stop of the motor 7 can sometimes be flushed out via the outlet pipe 4. Preferably, the ratio 10 15 20 25 30 35 12 is between the false alarm control limit PF of the operating parameter and the normal value of the operating parameter PN: PF 2 PN. During the control time TK and driving of the motor 7 in the first direction, the control unit 6 tries to generate a false alarm speed P3 of the motor 7 which is preferably equal to the normal operating speed FN.
    After the control time TK, the control unit 6 can continue to drive the motor 7 in the first direction according to normal operation, alternatively the motor 7 can be stopped whereby the pump 2 is kept in the inactive state for a predetermined waiting time Tv before normal operation is resumed.
    After the step of stopping the motor 7 after it is determined that the real value P of the operating parameter exceeds the false alarm control limit PF, the method preferably also comprises the step of keeping the pump 2 in the inactive state a predetermined waiting time Tv. In other words, the pump 2 is kept inactive for a waiting time Tv before the first reverse pull-off attempt is started.
    Reference is now made to Figure 4, in which an addition to the method according to Figure 2 in the form of a detachment attempt is described in advance, other parts of the method 10 remain unchanged and are not described below.
    After the step of stopping the motor 7 after it is determined that the absolute amount of the real value P of the operating parameter exceeds the absolute amount of the first release limit Pm, the method comprises the step of driving the motor 7 in the first direction by means of the control unit 6 for a predetermined flushing time TR. During the flushing time TR and driving the motor 7 in the first direction, the control unit 6 tries to generate a cleaning speed forward FM ~ of the motor 7. The cleaning speed forward Fm »is preferably in the range 75-100% of the motor 7 maximum speed Fww. During the purge time TR, the method performs the step of determining if the real value P of the operating parameter exceeds a second release limit Pm, where the second withdrawal limit PH of the operating parameter is greater than or equal to the operating limit clogging limit PI and is less than or equal to a factor of 0.95 times the absolute amount of the first detachment limit PM. If P> PM stop the motor 7, which means that the wedged material cannot be loosened and flushed out in the first pull-forward attempt forward. If P <PL2 and after the flushing time TR, the control unit 6 can continue to drive the motor 7 in the first direction according to normal operation, alternatively the motor 7 can be stopped whereby the pump 2 is kept in the inactive state for a predetermined waiting time TV before normal operation resumes. P <PM means that the wedged material is flushed out via the outlet pipe 4 during the first pull-forward attempt forward. Preferably, the ratio between the first release limit Pm of the operating parameter and the second release limit Pm of the operating parameter is Pm: Pm S 0.85 * | PM | , and most preferably PM = 0.8 * | Pm |.
    It should be pointed out that after the first retrieval attempt backwards, one or more retracting attempts backwards can be performed before the first forward release attempt is performed. Furthermore, the method 10 may perform a plurality of alternations between backward pulling attempts and forward pulling attempts before service personnel are called to the site, where each backward pulling attempt may include one or more pulling attempts forward and each forward pulling attempt may include one or more pulling attempts.
    For example, the first detachment limit PM may increase after each failed detachment attempt, and for example, the second detachment limit Pm may increase after each failed detachment attempt.
    The method 10 can also, when the wedged material has been released and before normal operation is resumed, comprise a flushing of the pump 2 by driving the motor 7 in the first direction by means of the control unit 6 during the maximum speed Fww during a flushing time TR.
    Finally, reference is made to Figures 5-7, which schematically show different cleaning sequences by means of an upper graph showing the actual operating speed / speed of the pump / motor and how this changes over time, and a lower graph showing the actual torque / current consumption of the pump / motor and how this changes over time.
    Figure 5 detects a blockage, after which a false alarm check is carried out where the blockage is confirmed. Then a first pull-back attempt is made backwards, which is successful. Then 10 15 20 25 30 35 14 a forward flushing takes place, with a selectable subsequent waiting time when the pump is inactive, before normal operation is resumed.
    Figure 6 detects a blockage, whereupon a false alarm is displayed. A check is then performed where the blockage is confirmed. a first pull-back attempt, which fails. first detachment attempt forward, which fails. A second pull-back attempt backwards, which succeeds. Thereafter, a forward flushing takes place, with selectable subsequent waiting time when the pump is inactive, before normal operation is resumed.
    Figure 7 detects a blockage, after which a false alarm check is carried out when false alarms are confirmed and normal operation is resumed.
    Possible modifications of the invention The invention is not limited only to the embodiments described above and shown in the drawings, which have only illustrative and exemplary purposes. This patent application is intended to cover all adaptations and variants of the preferred embodiments described herein, and consequently the present invention is defined by the wording of the appended claims and thus the equipment may be modified in any conceivable manner within the scope of the appended claims.
    It should be pointed out that even if it is not explicitly stated that features from a specific design can be combined with the features in another design, this should be considered obvious when possible.
    It should be understood that the waiting time TV may have different lengths at different phases in the method, however, one and the same designation is used in the description as well as in the requirements for the sake of clarity. The waiting time for TV is in the order of 3 seconds.
    It should be understood that the flushing time TR may have different lengths at different phases in the method, however, one and the same designation is used in the description as well as in the requirements for the sake of clarity.
    The rinse time TR is of the order of 3 seconds.
    Exact values of the limits stated in this document depend on the specific pump arrangement and its surroundings during operation and are thus not stated, but instead it is the mutual relations between the stated limits that are central in this document.
    Throughout this specification and in the following, it is to be understood, unless the context otherwise requires, that the word "include", and variants such as "includes" or "comprising", means including the specified unit or step or group of units or steps but not excluding other devices or steps or groups of devices or steps.
    权利要求:
    Claims (11)
    [1]
    A method of controlling a pump arrangement comprising a pump (2) and a control unit (6), wherein the pump (2) comprises a motor (7) and the control unit (6) is arranged to drive said motor (7), wherein the motor (7) during operation is associated with an operating parameter from which the torque of the motor (7) can be derived, said operating parameter has a normal value PN during normal operation of the motor (7) in a first direction, the method being characterized by the steps of: the control unit (6) drives the motor (7) in a first direction, - if a real value P of the operating parameter exceeds one in which P1 Z 1.05 * PN, predetermined clogging limit P1, stop (7), - by means of the control unit the motor (6 ) drive the motor (7) in a second direction opposite to the first direction during a predetermined flushing time TR, and - if the absolute amount of the real value P of the operating parameter during the flushing time TR exceeds the absolute amount of a first IPMI 2 l, l * Pm (7), (7) after said flushing time TR. release limit PM, where stop the engine otherwise stop the engine
    [2]
    Method according to claim 1, wherein the relationship between the clogging limit PI of the operating parameter and the operating parameter 1.1, * PN, 1.2 * PN. normal value PN is: P1 2 preferably P1 2
    [3]
    Method according to claim 1 or 2, wherein the ratio between the first release limit Pm of the operating parameter and the operating IPm | 2 2 * The clogging limit P1 of the parameter is: preferably | Pm | 2 3 * PR
    [4]
    A method according to any one of claims 1-3, wherein the method after the step of: - if a real value P of the operating parameter exceeds a predetermined clogging limit P1, wherein P12 1, O5 * PN, (7), also comprises the step of: stop the motor 10 15 20 25 30 35 17 - keep the pump (2) in an inactive state for a predetermined waiting time Tv.
    [5]
    A method according to any one of claims 1-4, wherein the method after the step of: - otherwise stopping the motor (7) after said flushing time TF, also comprises the step of: - keeping the pump (2) in an inactive state a predetermined waiting time Tv .
    [6]
    A method according to any one of the preceding claims, wherein the method after the step of: - if a real value P of the operating parameter exceeds a predetermined clogging limit P1, wherein PF2 1.05 * PN, (7), also comprises the steps of: stopping the motor - by means of the control unit (6) drive the motor (7) in the first direction for a predetermined control time TF, - if the real value P of the operating parameter P during the control time TK where PF S PF, exceeds a false alarm control limit PF, stop the motor (7).
    [7]
    Method according to claim 6, wherein the ratio between the false alarm control limit PF of the operating parameter and the normal value PN of the operating parameter is: PF Z PN.
    [8]
    Method according to one of the preceding claims, wherein the method after the step of: - if the absolute amount of the real value P of the operating parameter exceeds the absolute amount of a first release limit | PL1 | 2, 1 * P1, (7), also comprises the steps of: Pm, where stopping the motor - by means of the control unit (6) driving the motor (7) in the first direction for a predetermined flushing time TF, - if the real value P of the operating parameter exceeds a second where PL2 2 P1 and PL2 SO, 95 * | PF1L release limit PM, stop the motor (7). 10 15 18
    [9]
    A method according to claim 8, wherein the ratio between the second release limit PL2 and the first release limit PL1 is: PQ S 0, 85 * | PL , preferably PH = 0.8 * | Pm |.
    [10]
    Method according to one of the preceding claims, wherein the operating parameter consists of the current consumption of the motor (7).
    [11]
    11. ll. Method according to any one of the preceding claims, wherein the sub-step stopping the motor (7) in the step: - if a real value P of the operating parameter exceeds one in which P12 1.05 * Pm predetermined clogging limit P1, stop (7), includes that the control unit ( 6) the motor immediately after it is determined that the real value P of the operating parameter exceeds the clogging limit P1 abruptly interrupts the drive of the motor (7) in said first direction.
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    RU2016152221A3|2018-12-12|
    PL3152442T3|2019-09-30|
    ES2715680T3|2019-06-05|
    MA39551A1|2018-06-29|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
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    PCT/IB2015/054145| WO2015186046A1|2014-06-03|2015-06-01|Method for controlling a pump arrangement|
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    AU2015270108A| AU2015270108B2|2014-06-03|2015-06-01|Method for controlling a pump arrangement|
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    PL15727736T| PL3152442T3|2014-06-03|2015-06-01|Method for controlling a pump arrangement upon clogging of a pump|
    IL248865A| IL248865A|2014-06-03|2016-11-09|Method for controlling a pump arrangement|
    PH12016502289A| PH12016502289B1|2014-06-03|2016-11-16|Method for controlling a pump arrangement|
    CL2016003084A| CL2016003084A1|2014-06-03|2016-11-30|A method for controlling the arrangement of a pump after the obstruction of the pump, the arrangement of the pump comprising a pump and a control unit, the pump comprises a motor, and the control unit that is arranged to drive such a motor .|
    ZA2016/08883A| ZA201608883B|2014-06-03|2016-12-22|Method for controlling a pump arrangement|
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