Pump control system and method of calibrating control pump with automatic pump model

Abstract

The present disclosure relates to a method for controlling a pump wherein the method comprises the steps of:-operating (501) the pump at a set pump speed (omega) based on an operating value model function (P omega (q)) corresponding to the set pump speed (omega); determining (503) an actual operating value (P) at the set pump speed (omega); -comparing (505a, 505b) the actual operating value (P) with a maximum value (Pmax) of the operating value model function (P omega (q)) and / or a minimum value (Pmin) of the operating value model function (P omega (q)); and-if the actual operating value (P) is higher than the maximum value (Pmax) of the operating value model function (P omega (q)), automatically updating (507b) the operating value model function (P omega (q)) to a higher new operating value model function (P omega, up (q)), and / or if the actual operating value (P) is higher than the maximum value (Pmax), automatically updating (507a) the operating value model function (P omega (q)) to a lower new operating value model function (P omega, down (q)).

Description

Technical Field

[0001] The present disclosure relates to a pump control system and a method for controlling a pump using automatic pump model calibration. In addition, the present disclosure relates to a pump assembly with such a pump control system or controlled by such a method. Background Art

[0002] The pump can be used as a circulation pump for circulating water or another liquid through a pipe system (e.g. a heating or cooling system). Typically, a circulation pump can be operated in different operating modes. For example, a circulation pump can be operated to provide a constant output pressure, i.e., in constant pressure mode. Another operating mode is typically a "proportional pressure mode", in which the operating point of the circulation pump follows a linear line in a pressure-flow diagram (the so-called pq diagram). The overall goal of pump control is to control the pump in such a way that the pump operates exactly at the desired operating point (e.g. in the pq diagram). The output pressure P and the flow q are usually measured, and the measured values ​​are fed back in a closed-loop control so that the pump operates at the desired operating point.

[0003] However, flow sensors are expensive and often not available for pump control. As is well known, if measured flow values ​​that can be used for pump control are not available, known pump control systems and methods use similarity laws to estimate the current operating point based on other operating values ​​(e.g., actual power consumption P, motor current I and / or motor speed ω of the pump). However, using these operating values ​​to indirectly estimate the operating point requires an accurate model of the pump characteristics (e.g., a model function in a Pq diagram).

[0004] Pump manufacturers typically determine pump characteristics for certain pump types in laboratory and / or field tests and provide a data set with a plurality of model parameter sets indicating operating value model functions describing the pump characteristics for a certain model type.

[0005] Often, a pump type has multiple variants and a combination of numerous customization options. The real pump characteristics can differ slightly across the multiple variants, while the pump control system uses the same model functions to describe the pump characteristics. As a result, the real pump characteristics can differ from the assumed simulated pump characteristics. Manufacturing tolerances further increase the difference between the real pump characteristics and the assumed modeled pump characteristics. The real pump characteristics can even depend on the piping system to which the pump is connected, making the simulated pump characteristics that the pump manufacturer can provide through the pump control system inherently uncertain. Last but not least, the pump characteristics can change dynamically over time due to wear of mechanical and / or electrical components, making an old pump behave differently from a brand new pump.

[0006] US 7,945,411 B1, DE 10 2009 050 083 B4, US 9,897,084 B1 and US 9,470,217 B1 describe control systems in which the pump is either forced to operate at a known fixed operating point for calibration purposes or the actual operating point is determined by measuring or estimating the actual flow rate.

[0007] It is therefore an object of the present invention to provide an improved pump control system and an improved method for controlling a pump in which a pump model is used to control the pump without measuring or estimating flow and without forcing the pump into a known operating point. Summary of the invention

[0008] According to a first aspect of the present disclosure, there is provided a pump control system, comprising: - a storage element storing a plurality of model parameter sets for a plurality of pump speeds, wherein where each model parameter set indicates an operating value model function corresponding to a pump speed; - control electronics configured to command the pump to operate at a set pump speed based on an operating value model function corresponding to the set pump speed, wherein a corresponding model parameter set of a stored model parameter group is obtained from the storage element; and - Model updating electronic device, wherein the model updating electronic device is configured to: - Determine the actual operating value at the set speed; - Compare the actual operation value with the maximum value of the operation value model function and / or the minimum value of the operation value model function Small values ​​are compared; and - if the actual operating value is above a maximum value of the operating value model function, or if the operating value is below a minimum value of the operating value model function, automatically determining an updated set of model parameters, wherein if the actual operating value is above the maximum value of the operating value model function, the updated set of model parameters indicates a higher new operating value model function, and wherein if the actual operating value is below the minimum value of the operating value model function, the updated set of model parameters indicates a lower new operating value model function, wherein the storage element is also configured to store the updated set of model parameters.

[0009] The operating value may be the power consumption of the pump, the motor current or other directly available electrical performance value. It should be noted that the updating or calibration of the model parameter set does not require measured flow values ​​or estimated flow values. Furthermore, the pump does not need to be forced to operate at a fixed known operating point. The updating or calibration of the model parameter set may be performed dynamically and automatically during normal pump operation. The updating or calibration may be performed continuously, periodically and / or irregularly throughout the life of the pump.

[0010] The concept of the present invention is based on the fact that the normal operation of the circulation pump is often at or close to the minimum operating value or the maximum operating value. If the actual operating value determined is between the minimum and the maximum value of the operating value model function, it is impossible to evaluate the model function without a measured or estimated flow rate to determine the exact operating point. Outside the operating value range, that is, above the maximum value of the operating value model function and below the minimum value of the operating value model function, the deviation between the actual operating value and the operating value model function cannot be explained by the uncertainty of the flow rate. In this case, it can be assumed that the operating value model function does not reflect the true pump characteristics. Therefore, if the actual operating value is above the maximum value of the operating value model function and if the actual operating value is below the minimum value of the operating value model function, the operating value model function is updated or calibrated.

[0011] Optionally, the model updating electronic device may be configured to move or scale the operation value model function upward to a higher new operation value model function, and / or move or scale the operation value model function downward to a lower new operation value model function. In this case, the shape of the operation value model function may remain unchanged. Alternatively or additionally, the model updating electronic device may be configured to apply a correction function to adjust the shape of the operation value model function. For example, in the case of an upward update, the model function may be lifted only within a predefined range near the maximum value of the model function. Similarly, in the case of a downward update, the model function may be lowered within a predefined range near the minimum value of the model function.

[0012] Alternatively, a shift amount and / or scaling factor may be applied, where the shift amount and / or scaling factor is a predetermined constant or depends in a predetermined manner on the set pump speed. In the case where the shift amount and / or scaling factor is constant, the update logic is very simple and all pump speeds are given the same weight. However, if it is known that the model function is more accurate at certain pump speeds, it may be more advantageous to apply a shift amount and / or scaling factor that depends in a predetermined manner on the set pump speed.

[0013] Alternatively, the shift amount and / or the scaling factor may depend on the difference and / or the ratio between the actual operating value and the maximum or minimum value of the model function, respectively. Thus, the model function is adapted to the determined actual operating value.

[0014] Alternatively, the operating value model function may be a model curve of operating values, the model curve of operating values ​​being dependent on the pump flow within a predetermined flow range.Preferably, the model curve comprises a single well-defined minimum and maximum value within the predetermined flow range.

[0015] Optionally, the new higher operating value model function is at least within a sub-range of a predetermined flow range above the previous operating value model function, and the new lower operating value model function may be at least within a sub-range of a predetermined range below the previous operating value model function.

[0016] As described above, if the actual operating value is between the minimum and maximum values ​​of the operating value model function, the model function may not be automatically updated or calibrated. However, in this case, it may be advantageous to run the pump in a set of calibration batch runs. For example, such a calibration batch run may be started when a new pump is installed and initially operated for the first time. Alternatively or additionally, such a calibration batch run may be part of a regular maintenance action. Preferably, the calibration batch run is not started automatically, but is manually started by a technician or user.

[0017] Optionally, the model updating electronic device may be further configured to: - determine the maximum actual operating value and / or the minimum actual operating value in the calibration batch run, - Compare the maximum actual operating value with the maximum value of the operating value model function and / or compare the minimum The actual operation value is compared to the minimum value of the operation value model function; and - If the maximum actual operation value is higher than the maximum value of the operation value model function, the operation value model function is automatically updated to a higher new operation value model function, and / or if the minimum actual operation value is lower than the minimum value of the operation value model function, the operation value model function is automatically updated to a lower new operation value model function.

[0018] In other words, the calibration batch runs at different speeds are used to check whether the maximum actual operating value is above the maximum value of the model function and whether the minimum actual operating value is below the minimum value of the model function. Thus, a wider range or region of operating points can be scanned to update or calibrate the model parameter sets that indicate the model function corresponding to the corresponding pump speeds.

[0019] Optionally, the model update electronics may be integrated into the control electronics which commands the pump to operate at a set pump speed based on the current operating value model function. Alternatively or additionally, the model update electronics may be arranged separately and the model update electronics are only signal connected to the storage element to store the updated model parameter set received from the model update electronics.

[0020] According to a second aspect of the present disclosure, there is provided a pump assembly comprising: a pump, an electric motor for driving the pump, and an electronics housing for accommodating electric motor control electronics, wherein the pump control system is arranged in the electronics housing. This has the advantage that the pump assembly can perform automatic pump model calibration without accessing or connecting to a remote pump control system or remote model update electronics.

[0021] According to a third aspect of the present disclosure, a method for controlling a pump is provided, wherein the method comprises the following steps: - operating the pump at the set pump speed based on the operating value model function corresponding to the set pump speed; - Determine the actual operating value at the set pump speed; - comparing the actual manipulated value with a maximum value of the manipulated value model function and / or a minimum value of the manipulated value model function; and - If the actual operating value is higher than the maximum value of the operating value model function, the operating value model function is automatically updated to a higher new operating value model function, and / or if the actual operating value is lower than the minimum value of the operating value model function, the operating value model function is automatically updated to a lower new operating value model function.

[0022] Optionally, updating the operational value model function to a new higher operational value model function may include moving or scaling the operational value model function upward, and / or updating the operational value model function to a new lower operational value model function may include moving or scaling the operational value model function downward.

[0023] Optionally, a shift amount and / or a scaling factor may be applied, wherein the shift amount and / or the scaling factor may be a predetermined constant or may depend on the set pump speed in a predetermined manner.

[0024] Optionally, a shift amount and / or a scaling factor may be applied, wherein the shift amount and / or the scaling factor depends on a difference and / or a ratio between the axial manipulated value and a maximum value of the manipulated value model function or a minimum value of the manipulated value model function.

[0025] Optionally, the method may further include operating the pump in the set of calibration batch runs at different pump speeds if the actual operating value is equal to or above a minimum value of the operating value model function and if the actual operating value is equal to or below a maximum value of the operating value model function.

[0026] Optionally, the method may further comprise the following steps: - determining the maximum actual operating value and / or the minimum actual operating value in the calibration batch run; - comparing the maximum actual operating value with the maximum value of the operating value model function and / or comparing the minimum actual operating value with the minimum value of the operating value model function; and - If the maximum actual operation value is higher than the maximum value of the operation value model function, the operation value model function is automatically updated to a higher new operation value model function, and / or if the minimum actual operation value is lower than the minimum value of the operation value model function, the operation value model function is automatically updated to a lower new operation value model function.

[0027] The method disclosed herein can be implemented in the form of compiled or uncompiled software code stored on a computer-readable medium with instructions for performing the method. Alternatively or additionally, the method can be performed by software installed in an electronic device located in an electronic device housing of a pump assembly, or by software running in a cloud-based system and / or building management system (BMS) (e.g., in a pump control system disclosed herein).

[0028] The pump control systems and methods described herein may be implemented and integrated in electronic devices located within an electronic housing of a pump assembly, or in at least one central controller that controls a plurality of pumps (e.g., as part of a building management system (BMS)). It is also possible to implement the control systems and methods described herein, at least in part, in a remote cloud computing environment. A cloud computing environment may be particularly useful in the context of geographically widely distributed fluid distribution systems, such as municipal water systems or district heating or cooling systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Embodiments of the present disclosure will now be described by way of example with reference to the following drawings, in which: Figure 1 shows a perspective view of a pump assembly according to the present disclosure; Figure 2 A Pq diagram showing an example of a pump characteristic of a pump assembly operating at twelve different speeds; Figure 3 It shows that Figure 2 Pump characteristics of four different pumps of the same pump type shown; Figure 4 The pump characteristics for a single pump speed are shown in the Pq diagram; Figure 5 A schematic diagram showing a method for controlling a pump according to the present disclosure; and Figure 6 A schematic diagram showing further preferred steps of the method for controlling a pump according to the present disclosure is shown. DETAILED DESCRIPTION

[0030] Figure 1A pump assembly 1 according to the present disclosure is shown. The hardware of the pump assembly 1 is here substantially identical to the known pump type "Grundfos Magna3 50-60". The hardware comprises a pump housing 3 having an inlet flange 5 and an outlet flange 7. The inlet flange 5 and the outlet flange 7 can be connected to a pipe system (not shown) for pumping water or other liquids through the pipe system. The inlet flange 5 and the outlet flange 7 are coaxially arranged on an axis L, which defines a main pumping direction. The pump assembly 1 further comprises an electric motor drive 9 for driving an impeller (not visible) located in the pump housing 3. The motor rotor and the impeller rotate about a rotor axis R extending perpendicular to the axis L. The pump assembly 1 further comprises an electronics housing 11 for accommodating motor control electronics. The motor control electronics are configured to command the pump motor to run at a set pump speed. The front of the electronics housing 11 comprises a human-machine interface 13, which comprises a display 15 and buttons 17 for outputting and inputting information, commands, settings, parameters and / or programs. The pump assembly 1 may include an automatic pump control algorithm to operate automatically and / or may be manually set to operate at a certain operating point using the human machine interface 13 .

[0031] The pump control electronics within the electronics housing 11 are programmed so that the pump assembly 1 includes a new pump control system according to the present disclosure. The pump control system of the pump assembly 1 includes a storage element that has stored a plurality of model parameter sets for a plurality of pump speeds, wherein each model parameter set indicates an operating value model function corresponding to a pump speed. If the operating value model function is very accurate, the pump assembly 1 is able to operate at a desired operating point without a measured or estimated flow value. For example, the operating value may be the actual power consumption of the pump assembly or the current consumed by the motor drive of the pump assembly 1. Another example of an operating value may be the output pressure measured by a pressure sensor. The advantage of considering the actual power consumption or motor current as analog operating values ​​is that these are easily available without the need for a pressure sensor.

[0032] The pump control system of the pump assembly 1 further comprises control electronics configured to command the pump to operate at the set pump speed based on an operating value model function corresponding to the set pump speed, wherein a corresponding model parameter set of the stored model parameter sets is obtained from the storage element. When a new pump assembly 1 is put into service, the initial model parameter set stored in the storage element may be determined for the pump type using a specific fitting and modeling process in laboratory tests or field tests.

[0033] Figure 2 The results of this fitting or modeling process are shown to determine a set of model parameters that indicate an operational value model function. Figure 2 In the example shown, the operating value is the power consumption P of the pump assembly 1, so Figure 2A Pq diagram is shown, in which the power consumption P of the pump assembly 1 is shown as a function of the pumping flow q. Figure 2 The so-called "power curves" are shown for twelve different pump speeds ω1 to ω12. There are many ways to fit a "power curve" to the data points, such as Figure 2 shown. Figure 2 Two different model functions are actually shown, where model function #2 is a fine-tuning of model function #1. For example, the model function can be a polynomial function. The model function can be described by a set of model parameters that are initially determined by a simulation or fitting process under laboratory or field test conditions.

[0034] Figure 3 Shows Figure 2 The power consumption model function P ω (q) How to fit four different pumps of the same pump type. It can be seen that manufacturing tolerances can cause the data points and the model function P to ω (q) Such deviations can also be caused by pump variants of the same pump type or by wear after a certain operating time.

[0035] Figure 4 shows how the model function P is used for each individual pump assembly 1 during normal operation of the pump assembly 1 ω (q) Automatic updating or calibration is performed to reduce the deviation between the actual current pump characteristics and the assumed simulated pump characteristics. Figure 4 shows that at the minimum flow rate q min and the maximum flow rate q max Power curve for a single pump speed within a predetermined flow range between. Figure 4 The power curve in has a well-defined minimum value P min and the maximum value P max . Figure 4 Three different operating regions A, B and C are shown. Operating region A includes all regions where the power consumption is below the power consumption model function P ω The minimum value P of (q) min Operating region B includes all power consumption at P min and P max The operating region C includes all the operating points with power consumption higher than the power consumption model function P ω The maximum value of (q)P max Now, the idea of ​​improving the model function is that if the actual power consumption P currently determined is within the operating area A, that is, lower than the minimum value P of the model function of the currently set pump speed ω min , then reduce the model function. The basic principle here is that the actual determined power consumption P and the model function P ωThe deviation between (q) and (q) cannot be caused by the uncertainty of the flow rate. Similarly, if the actual power consumption P currently determined is within the operating area C, that is, higher than the model function P ω The maximum value of (q)P max , then the model function is improved. The same principle applies here, and this deviation cannot be explained by the uncertainty of the flow. If the actual power consumption currently determined is within the operating area B, that is, at the minimum value P of the model function min and the maximum value P max Between, the model function P ω (q) can remain unchanged temporarily. The reason is that the deviation may be caused by the uncertainty of the current unknown flow q.

[0036] Figure 5 The flow chart shows an applied method for controlling a pump assembly 1. In a first step 501, a model function P is generated based on an operating value corresponding to a currently stored model parameter set. ω (q), the pump runs at the set pump speed ω. In the second step 503, the actual power consumption P of the pump assembly 1 is determined. Then, in the following steps 505a, 505b, the actual power consumption P is compared with the power consumption model function P ω The minimum value P of (q) min and / or power consumption model function P ω The maximum value of (q)P max It should be noted that comparisons 505a, 505b may be performed in parallel or sequentially, wherein if one comparison is positive, the other comparison is obsolete. However, if the first comparison is negative, both comparisons 505a, 505b are performed. If comparison 505a is positive, i.e., P <P min , then reduce the model function P ω (q) (step 507a), and the new reduced power consumption model function P ω,down The new model parameter set of (q) is stored in the storage element for subsequent use based on the new lower power consumption model function P ω,down (q) to run the pump. Similarly, if comparison 505b is positive, that is, P>P max , then the power consumption model function P is improved ω (q) (step 507b) to a new higher power consumption model function P ω,up (q). Indicates the new higher power consumption model function P ω,down The new parameter set model parameter set of (q) is stored in the storage element for subsequent use based on the new higher power consumption model function P ω,up (q) Running the pump. Only when both comparisons 505a and 505b are negative, that is, the currently determined actual power consumption P is within the operating region B (i.e., Pmin and P max Between), power consumption model function P ω (q) can be temporarily kept unchanged (step 509).

[0037] Figure 6 The pump assembly 1 is shown in Figure 4 When the current power consumption P is equal to or higher than the power consumption model function P ω The minimum value P of (q) min , and if the actual power consumption P is equal to or lower than the power consumption model function P ω The maximum value of (q)P max , further steps that can be triggered manually. For example, in step 601, the pump assembly 1 may be operated at different speeds in a group of calibration batch runs. Thus, the actual power consumption P and the power consumption model function P can be scanned over a larger operating range. ω In step 603, the minimum actual power consumption P in the calibration batch operation is determined. batch,min and / or the maximum actual power consumption P batch,max . Similar to Figure 5 , followed by two comparison steps 605a and 605b, in which the minimum actual power consumption P batch,min And the power consumption model function P ω The minimum value P of (q) min By comparison, the maximum actual power consumption P batch,max And the power consumption model function P ω The maximum value of (q)P max Only when both comparisons are negative, the power consumption model function P ω (q) remains unchanged. If the minimum actual operating value in the calibration batch run is lower than the power consumption model function P ω The minimum value P of (q) min , then reduce the power consumption model function P ω (q) (step 607a) is a lower new power consumption model function P ω,down (q). Similarly, if the maximum actual operating value P in the calibration batch run batch,max Higher than the power consumption model function P ω The maximum value of (q)P max , update or calibrate the power consumption model function P ω (q) (step 607b) to a new higher power consumption model function P ω,up (q). Only when both comparisons 605a and 605b are negative, the power consumption model function P ω (q) can be temporarily kept unchanged (step 609).

[0038] In the foregoing description, reference is made to wholes or elements that have known, obvious or foreseeable equivalents, and such equivalents are incorporated herein in the same manner as if they were individually recorded herein. Reference should be made to the claims to determine the true scope of the disclosure, which should be interpreted as including any such equivalents. The reader will also understand that wholes or features described in the disclosure as optional, preferred, advantageous, convenient or the like are optional and do not limit the scope of the independent claims.

[0039] The above embodiments should be understood as illustrative examples of the present disclosure. It should be understood that any feature described with respect to any one embodiment may be used alone or in combination with other features described, and may also be used in combination with one or more features of any other embodiment, or in combination with any combination of any other embodiment. Although at least one exemplary embodiment has been shown and described, it should be understood that other modifications, substitutions, and alternatives are obvious to those of ordinary skill in the art and may be changed without departing from the scope of the subject matter described herein, and this application is intended to cover any modifications or variations of the specific embodiments discussed herein.

[0040] In addition, "comprising" does not exclude other elements or steps, and "one" or "a kind" does not exclude the plurality. In addition, the features or steps described with reference to one of the above exemplary embodiments may also be used in combination with other features or steps of the other exemplary embodiments described above. The method steps may be applied in any order or in parallel, or may constitute a part of or a more detailed version of another method step. It should be understood that all such modifications should be embodied within the scope of the claimed patent because they reasonably and appropriately fall within the scope of the contribution to the art. These modifications, substitutions and alterations can be made without departing from the spirit and scope of the present disclosure, which should be determined by the appended claims and their legal equivalents.

[0041] Reference Signs 1 Pump assembly 3 Pump housing 5. Inlet flange 7 Outlet flange 9 Motor drive 11Electronic equipment housing 13Human Machine Interface (HMI) 15 Display 17 buttons L Main flow direction axis RRotation axis Pump speed Power Consumption qFlow P ω (q) Operation value model function P min Minimum value of the model function P max The maximum value of the model function P batch,min Minimum practical operating value P batch,max Maximum practical operating value

Claims

1. A pump control system, comprising: a storage element storing a plurality of model parameter sets for a plurality of pump speeds, wherein each model parameter set indicates an operation value model function (P ω (q)); - control electronics configured to determine the pump speed (ω) based on an operating value model function (P ω (q)) to command the pump to operate at the set pump speed (ω), wherein a corresponding model parameter set among the stored model parameter sets is obtained from the storage element; and - Model updated electronic equipment, The model updating electronic device is configured as follows: - determining the actual operating value (P) at said set speed (ω); - Compare the actual operation value (P) with the operation value model function (P ω The maximum value (P max ) and / or the operation value model function (P ω (q)) minimum value (P min ) for comparison; and - If the actual operation value (P) is higher than the operation value model function (P ω The maximum value (P max ) or if the actual operating value (P) is lower than the operating value model function (P ω (q)) minimum value (P min ), automatically determine an updated set of model parameters, where If the actual operation value (P) is higher than the operation value model function (P ω The maximum value (P max ), the updated model parameter set indicates a higher new operational value model function (P ω,up (q)), and wherein, if the actual operation value (P) is lower than the operation value model function (P ω (q)) minimum value (P min ), the updated model parameter set indicates a lower new operational value model function (P ω,down (q)), The storage element is further configured to store the updated model parameter set.

2. The pump control system according to claim 1, wherein: The model updating electronic device is configured to update the operation value model function (P ω (q)) moves upward or scales to the higher new operational value model function (P ω,up (q)) and / or the operation value model function (P ω (q)) moves downward or scales to the lower new operational value model function (P ω,down (q)).

3. The pump control system according to claim 2, wherein: A shift amount and / or a scaling factor is applied, wherein the shift amount and / or the scaling factor is a predetermined constant or depends on the set pump speed (ω) in a predetermined manner.

4. The pump control system according to claim 2, wherein: Apply a shift amount and / or a scaling factor, wherein the shift amount and / or the scaling factor depends on the actual manipulated value (P) and the manipulated value model function (P ω The maximum value (P max ) or the operation value model function (P ω (q)) minimum value (P min ) between the two.

5. A pump control system according to any one of the preceding claims, wherein: The model updating electronic device is configured to apply a correction function to adjust the operation value model function (P ω (q)) shape.

6. A pump control system according to any one of the preceding claims, wherein: The operation value model function (P ω (q)) is the operating value (P) within the predetermined flow range ([q min ,q max ]) depends on the model curve of the pumping flow rate (q).

7. The pump control system according to claim 6, wherein: The higher new operation value model function (P ω,up (q)) is at least higher than the previous operation value model function (P ω (q)) The predetermined flow range ([q min ,q max ]) and wherein the lower new operating value model function (P ω,down (q)) is at least lower than the previous operating value model function (P ω (q)) The predetermined range [q min ,q max ] in a subrange of ].

8. A pump control system according to any one of the preceding claims, wherein: If the actual operation value (P) is equal to or higher than the operation value model function (P ω (q)) minimum value (P min ), and if the actual operation value (P) is equal to or lower than the operation value model function (P ω The maximum value (P max ), the control electronics being further configured to operate the pump at different pump speeds in grouped calibration batch runs.

9. The pump control system according to claim 8, wherein: The model updating electronic device is further configured to: - Determine the maximum actual operating value (P) of the calibration batch run batch,max ) and / or the minimum practical operating value (P batch,min ), - The maximum practical operating value (P batch,max ) and the operation value model function (P ω The maximum value (P max ) and / or the minimum actual operating value (P batch,min ) and the operation value model function (P ω (q)) minimum value (P min ) for comparison; as well as - If the maximum practical operating value (P batch,max ) is higher than the operational value model function (P ω The maximum value (P max ), automatically converting the operation value model function (P ω (q)) is updated to a higher new operation value model function (P ω,up (q)), and / or if the minimum practical operating value (P batch,min ) is lower than the operating value model function (P ω (q)) minimum value (P min ), automatically converting the operation value model function (P ω (q)) is updated to a lower new operation value model function (P ω,down (q)).

10. A pump control system according to any one of the preceding claims, wherein: The model updating electronics are integrated into the control electronics.

11. A pump assembly (1), comprising: A pump, an electric motor (9) for driving the pump, and an electronics housing (11) for accommodating the electric motor control electronics, wherein the pump control system according to any of the preceding claims is arranged in the electronics housing (11).

12. A method for controlling a pump, wherein: The method comprises the following steps: - Based on the operating value model function (P ω (q)), operating (501) the pump at the set pump speed (ω); - determining (503) an actual operating value (P) of said set pump speed (ω); - the actual operation value (P) and the operation value model function (P ω The maximum value (P max ) and / or the operation value model function (P ω (q)) minimum value (P min ) are compared (505a, 505b); and - If the actual operation value (P) is higher than the operation value model function (P ω The maximum value (P max ), the operation value model function (P ω (q)) automatically updates (507b) to a higher new operating value model function (P ω,up (q)), and / or if the actual operating value (P) is lower than the operating value model function (P ω (q)) minimum value (P min ), the operation value model function (P ω (q)) automatically updates (507a) to a lower new operating value model function (P ω,down (q)).

13. The method according to claim 12, wherein: The operation value model function (P ω (q)) is updated (507b) to the higher new operation value model function (P ω,up (q)) includes upward shifting or scaling the operational value model function (P ω (q)) and / or the operation value model function (P ω (q)) is updated (507a) to the lower new operation value model function (P ω,down (q)) includes shifting down or scaling the operational value model function (P ω (q)).

14. The method according to claim 13, wherein: A shift amount and / or a scaling factor is applied, wherein the shift amount and / or the scaling factor is a predetermined constant or depends on the set pump speed (ω) in a predetermined manner.

15. The pump control system of claim 13, wherein: Apply a shift amount and / or a scaling factor, wherein the shift amount and / or the scaling factor depends on the actual manipulated value (P) and the manipulated value model function (P ω The maximum value (P max ) or the operation value model function (P ω (q)) minimum value (P min ) between the two.

16. The method according to any one of claims 12 to 15, further comprising: If the actual operation value (P) is equal to or higher than the operation value model function (P ω (q)) minimum value (P min ), and if the actual operation value (P) is equal to or lower than the operation value model function (P ω The maximum value (P max ), operating (601) the pump at different pump speeds in grouped calibration batch runs.

17. The method according to claim 16, further comprising: - determining (603) the maximum actual operating value (P) of said calibration batch run batch,max ) and / or the minimum practical operating value (P batch,min ); - The maximum practical operating value (P batch,max ) and the operation value model function (P ω The maximum value (P max ) is compared (605a) and / or the minimum actual operation value (P batch,min ) and the operation value model function (P ω (q)) minimum value (P min ) for comparison (605b); and - If the maximum practical operating value (P batch,max ) is higher than the operational value model function (P ω The maximum value (P max ), the operation value model function (P ω (q)) automatically updates (607b) to a higher new operating value model function (P ω,up (q)), and / or if the minimum practical operating value (P batch,max ) is higher than the operational value model function (P ω The maximum value (P max ), the operation value model function (P ω (q)) automatically updates (607a) to a lower new operating value model function (P ω,down (q)).

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