Method for collecting operating parameter data of a motor system with an electric motor and corresponding motor system

Description

[0001] The invention relates to a method for acquiring operating parameter data of a motor system with an electric motor. The motor system can preferably be provided as a component of a fan.

[0002] Furthermore, the invention relates to a motor system for recording operating parameter data.

[0003] Finally, the invention relates to a fan with a corresponding motor system.

[0004] The term "motor system" is to be understood in the broadest sense. The teaching of the invention can be applied, for example, to an electric motor, to an arrangement of several electric motors, to groups of electric motors, or to several electric motor systems. The motor system can include a control unit with a processor and memory.

[0005] In practice, it is frequently important to estimate or determine the remaining service life of a component or assembly of a motor system or electric motor. By way of example, reference is made to DE 10 2016 122 404 A1, which concerns the determination of rotor fatigue in the assembly of an electric motor.

[0006] Determining the remaining service life of a component or assembly is particularly important when a failure would lead to consequential damage, as is the case, for example, in thermally critical applications. If, for instance, the cooling system or a part of it fails in a server room, this can lead to overheating and a system outage, or even the destruction of servers and other hardware. The cooling of other complex and / or expensive electronic systems is similarly critical. In such application scenarios, it is helpful if an impending failure is indicated early on, so that the component at risk of failure can be replaced in time.Furthermore, it is also of particular relevance in this regard if, in the event of a malfunction or following an incident of damage, at least an evaluation and analysis of operating parameter data can be carried out in order to enable the identification of causes.

[0007] Especially in inverters, such as those used to control electric motors, for example EC (electronically commutated) motors, several components and assemblies are present that limit their lifespan. Semiconductors (primarily in the output stage or in optocouplers) and capacitors (primarily electrolytic capacitors in the DC link or in switched-mode power supplies) are usually most at risk of failure. Capacitors, in particular, are subject to significant temperature- and load-current-dependent aging, which is why their lifespan can vary considerably.

[0008] In practice, electric motors are widely used in fans, ranging from miniature drives and servo motors to high-performance drives. Like many mechanically moving devices, electric motors are subject to (mechanical) wear. In slip-ring electric motors, the slip ring and sliding contacts are particularly affected. However, even electric motors without slip rings can become inoperable due to wear. In these cases, the motor shaft bearings are among the most vulnerable mechanical components.

[0009] The extent of wear depends primarily on the operating conditions of the electric motor. For example, if the electric motor is operated at excessively high or low temperatures, the bearing grease can no longer provide optimal lubrication, and the bearing will fail more quickly. Strong vibrations can also shorten the bearing's lifespan, as the bearings have to absorb additional forces due to the vibrations. This necessitates understanding the physical quantities that influence the operating parameters of an electric motor. Knowing these relevant physical quantities allows for the detection of wear-prone operating conditions or, in the event of a failure, the selection of a replacement motor suitable for the expected operating parameters.

[0010] It is common practice to attach sensors to the housing of an electric motor to provide information about its operating parameters. These sensors primarily measure temperature and vibration. Furthermore, various characteristics of the electric motor's power supply signal, such as voltage ripple or current, can be used to infer the motor's operating behavior.

[0011] Consequently, preserving and storing the identifiable operating parameter data is of particular importance in order to analyze and evaluate this collected data for optimization purposes or for troubleshooting. Examples can be found in EP 1 967 930 A2, JP 2006 101576 A, DE 10 2016 108506 B3, and WO 2004 / 079889 A1.

[0012] Continuous data acquisition, however, requires significant storage capacity, which is typically neither available nor feasible in fan hardware. Therefore, a gateway integrated into the motor system could provide a way to directly forward collected operating parameter data to a central evaluation unit. However, this is cumbersome and requires a permanent connection of the gateway to central, higher-level computing units capable of receiving and processing the enormous amounts of data. Furthermore, the necessary transfer of substantial data volumes is inefficient and disadvantageous.

[0013] Based on the current state of production known from practical experience with regard to fans, no meaningful recording of operating parameter data takes place for standard series devices, and in particular with regard to customer operation, no operating data is available that would allow for optimization potential and / or a determination / identification of failure causes of a motor system.

[0014] The present invention therefore aims to design and further develop a method for acquiring operating parameter data of a motor system comprising an electric motor of the type mentioned above, such that improved and / or more efficient acquisition and storage of operating parameter data, preferably directly in / on the motor system, is possible. Furthermore, a corresponding motor system and a corresponding fan are to be specified.

[0015] According to the invention, the foregoing problem is solved by the features of claim 1. A method for acquiring operating parameter data of a motor system with an electric motor, preferably for a fan, is described, wherein, during operation of the motor system, states of operating parameters are acquired, the operating parameters comprising a basic parameter and at least one additional parameter, wherein, based on a state acquisition of the basic parameter, state change events of the basic parameter are determined, wherein, upon detection of a state change event of the basic parameter, a state of the additional parameter is acquired, and wherein the acquired state of the additional parameter is stored in conjunction with the detected state change event.

[0016] The foregoing problem is further solved by the features of claim 16. According to this claim, a motor system for acquiring operating parameter data is specified, wherein the motor system comprises the following: an electric motor with a stator and a rotor rotatable relative to the stator, and a control device with a processor and a memory, wherein the control device is configured such that during operation of the motor system, states of operating parameters are detected, wherein the operating parameters comprise a basic parameter and at least one additional parameter, wherein the control device is further configured such that, based on a state detection of the basic parameter, state change events of the basic parameter are determined, and that upon detection of a state change event of the basic parameter, a state of the additional parameter is detected, and that the recorded state of the additional parameter is stored in the memory in conjunction with the detected state change event.

[0017] Finally, the aforementioned problem is solved by a fan having the features of claim 17. According to this claim, the fan comprises a motor system according to claim 16.

[0018] In accordance with the invention, it has first been recognized that it is a considerable advantage to reduce the operating parameter data of an engine system required for subsequent analyses and evaluations as much as possible during data acquisition. Furthermore, it has been recognized that a selection method can be implemented to reduce the amount of data to be stored, by which it is determined whether the current operating point should be evaluated and / or stored. Therefore, to acquire operating parameter data of the engine system, the states of operating parameters are recorded during operation. The operating parameters comprise a basic parameter and at least one additional parameter. According to the invention, predefinable state change events of the basic parameter are determined based on a state acquisition of the basic parameter.According to the invention, when a predefined state change event of the base parameter is detected, a state of the additional parameter, preferably prevailing at the time of detection of the state change event, is recorded. The recorded state of the additional parameter is then stored in conjunction with the detected state change event.

[0019] Consequently, the inventive method for acquiring operating parameter data of a motor system, the inventive motor system, and the inventive fan enable improved and / or more efficient acquisition and storage of operating parameter data in the motor system. The invention is thus based on the idea of ​​acquiring relevant operating points of the motor system, particularly with regard to relevant components of the motor system, in a storage-efficient manner, so that operating data is available for subsequent analyses in the event of damage (root cause analysis), or so that the operating parameter data can be used as a long-term database for the systematic development and optimization of the motor system or its components. Advantageously, a control unit or control device with storage functionality is provided in the motor system or in the electric motors used.

[0020] It should be noted here that a "predefinable state change event" to be determined – particularly within the scope of the claims and preferably within the scope of the description – can be understood as a specific or defined state change event in which the state of an operating parameter changes significantly. It is conceivable that the predefinable state change event is defined – rigidly or not rigidly – ​​in advance of engine operation with regard to its significance. Furthermore, it is conceivable that a predefinable state change event can be understood as a state change event that can be independently created and / or adapted by the engine system during a learning phase in customer operation and / or during the ongoing operation of the engine system. Thus, it is conceivable that, within the scope of an advantageous embodiment, the predefinable state change event is not rigidly defined or...is not predefined, but rather can be adapted during operation by a learning engine system.

[0021] Furthermore, it should be noted that the "acquisition" or "detection" of the state of an operating parameter—particularly within the scope of the claims and preferably within the scope of the description—is to be understood as state acquisition in the broadest sense. The state can be obtained based on measurements. It is also conceivable that the state of an operating parameter is calculated, for example, based on plant-specific simulations. A combined use of simulation data and real measurement data is also possible. Thus, the expression "acquired state" of an operating parameter (basic parameter and / or additional parameter) can be understood to mean that the state is acquired by measurement and / or calculation.

[0022] The "operating parameters of an electric motor or motor system" can encompass various pieces of information that characterize the operating conditions of the electric motor or motor system. Such operating parameters can include, for example, the operating temperature, the bearing temperature, vibration stress, the orientation of the electric motor, the rotational speed, or the humidity. This brief and non-exhaustive list illustrates the range of possible operating parameters for an electric motor. In principle, anything that directly or indirectly influences the service life of an electric motor or motor system can be considered such an operating parameter. The physical quantity measured by a sensor that is representative of the respective operating parameter can be correspondingly diverse. An operating parameter, or its status monitoring, can therefore be based on one or more measured—preferably physical—quantities.Furthermore, it is conceivable that an operating parameter or its state detection is based on data obtained through internal processing or simulation and / or possibly through calculations.

[0023] To store acquired operating parameter data in or on the motor system, the motor system's electronics can preferably include a memory designed to store the acquired operating parameter states. To prevent data loss in the event of a power failure, the memory can preferably be designed as non-volatile memory. Such non-volatile memory can be, for example, flash memory, an EEPROM (Electronically Erasable Programmable Read-Only Memory), an NVRAM (Non-volatile Random Access Memory), or another semiconductor memory.

[0024] Advantageously, a predefined classification can be used as a basis for state monitoring of an operating parameter, whereby a recorded state of the operating parameter is assigned to a predefined class within the classification. This allows for the implementation of a suitable counting method that enables efficient acquisition and storage of the states of the monitored operating parameters. A class can, for example, correspond to a predefined range of operating parameters. Accordingly, a range-wise division of an operating parameter within a defined operating parameter range can be referred to as a class. For counting state change events, it is expedient to subdivide the measurement range of the operating parameters into classes of equal size, so that the classification of an operating parameter is defined equidistantly.Furthermore, it is also conceivable that the classification is defined non-linearly by an operating parameter.

[0025] It should be noted here that the predefined classification – and thus the classes defined by the classification – can be determined prior to engine operation, so that a predefined classification is provided. Furthermore, it is conceivable that the classification – and thus the classes defined by the classification – is created and / or adapted for an operating parameter during operation of the engine system and / or during a learning phase of the engine system, possibly individually.

[0026] In a further advantageous manner, when the state change event of the base parameter is detected, the state of one or more additional parameters prevailing at the time of detection can be recorded, whereby the recorded state(s) of the additional parameter(s) are also stored in conjunction with the detected state change event. Consequently, further operating parameter data can be efficiently preserved or stored in relation to the respective recorded state change event.

[0027] According to the invention, the detected state change event of the base parameter and the detected state of the additional parameter are stored as a state combination. Furthermore, when considering multiple additional parameters, the detected states of the additional parameters and the detected state change event are stored as a state combination. This means that the detected state change event and the detected state of the additional parameter, and optionally the detected state of the further additional parameter(s), can be stored as a state combination.

[0028] Consequently, a memory-efficient acquisition of operating parameter data is possible, allowing for the linked analysis of multiple operating parameters. Considering two or more operating parameters, the storage of determined operating states can be implemented. During engine operation, depending on the change in a first operating parameter (the base parameter), the concurrently prevailing state of at least one further operating parameter (the additional parameter) is detected and stored. Thus, a sophisticated method of data acquisition and storage of operating data on the engine system is achieved through intelligent compression based on the selection of a specific data set.

[0029] Advantageously, the storage of the state combination can therefore be carried out depending on the change in the base parameter. Consequently, a storage-efficient method can be provided, whereby relevant operating states of the engine system are recorded in the form of the state combination as a result of detected state change events, and a measure for storing the state combination is initiated or carried out depending on the detected characteristic state change of the base parameter.

[0030] With regard to the efficient storage of acquired or calculated operating parameter data, it is conceivable that the detected state change event is stored by the state combination in such a way that the start and end states of the state change of the detected state change event of the base parameter are stored in the state combination. Thus, the state before the characteristic state change and the state after the characteristic state change are stored as the start and end states of the state change event of the base parameter.

[0031] According to the invention, state combinations generated by detected state change events during operation can be stored in or by means of a matrix. The matrix comprises matrix elements that are addressable via the columns and rows of the matrix. Advantageously, the matrix can be implemented as a multidimensional matrix or as a nested matrix, wherein each matrix element stores further sub-elements. These sub-elements can comprise scalars, vectors, and / or matrices.

[0032] Furthermore, the state combinations are stored in the matrix in such a way that a distribution of the detected state change events of the base parameter is obtainable. Thus, the respective state changes of the state change events of the base parameter are available for subsequent operational data analysis.

[0033] To efficiently store the recorded or determined operating states, the state combinations are stored in the matrix such that the start and end states of the state change events are represented by matrix indices, preferably column and row indices. Information regarding the number of state events can conveniently be stored in the matrix elements. This ensures simple and efficient storage of the recorded operating states.

[0034] Advantageously, information about the states of additional parameters can be stored in the matrix elements of the matrix. The matrix can be a nested matrix with matrix elements, where the matrix elements themselves can comprise vectors and / or one or more matrices. Thus, various pieces of information about additional parameters, especially their states, can be efficiently stored in the nested matrix.

[0035] With regard to the appropriate collection of relevant operating parameter data, the state of the base parameter, determined by means of state monitoring, can be subjected to evaluation / analysis at predefined evaluation intervals in order to detect a state change event of the base parameter. This efficiently implements the detection of state change events. A state change event can represent a predefined state change of the base parameter.

[0036] Advantageously, the evaluation can be implemented such that a state change event of the basic parameter is detected when a predefined change threshold, in particular a state change threshold, is exceeded. Thus, by selecting a suitable change threshold, it can be determined which state changes should be considered characteristic state changes with regard to the acquisition and storage of operating parameter data.

[0037] Advantageously, the operating parameters can include a speed parameter, a temperature parameter, a current parameter, and / or a voltage parameter, etc. This allows operating parameters of the motor system or electric motor to be considered and stored, which are particularly important for any subsequent analysis and / or optimization of the motor system. Operating parameters can thus include information about speed, temperature, current, voltage, etc. Furthermore, gradients or other mathematical derivatives derived from these parameters are also conceivable.

[0038] With regard to the acquisition and storage of meaningful operating parameter data, it is conceivable to use a speed parameter as the base parameter. A temperature parameter and / or a current parameter could be appropriately considered and recorded as additional parameters. Storing the operating parameter data as a function of the speed parameter as the base parameter can, for example, result in the following advantages: Detailed knowledge of operating mode changes in an engine system enables a systematic analysis of customer operating parameters; data analysis for determining correlations between operating mode and damage patterns enables consideration of cold starts when estimating service life

[0039] Furthermore, with regard to the acquisition and storage of meaningful operating parameter data, it is conceivable that a voltage parameter is used as a basic parameter.

[0040] There are now various ways to advantageously elaborate and further develop the teaching of the present invention. Reference is made, on the one hand, to the claims subordinate to claim 1 and, on the other hand, to the following explanation of preferred embodiments of the invention with reference to the drawing. In conjunction with the explanation of the preferred embodiments of the invention with reference to the drawing, generally preferred embodiments and further developments of the teaching are also explained.

[0041] The drawing shows Fig. 1 in a schematic view a block diagram of a method for acquiring operating parameter data of a motor system according to an embodiment of the invention, Fig. 2 in a schematic view an algorithm for detecting a change of state event for a method for acquiring operating parameter data of a motor system according to an embodiment of the invention, Fig. 3a a diagram for illustrating, by way of example, the states of an operating parameter determined over time, Fig. 3b a diagram for illustrating, by way of example, the states of another operating parameter determined over time, Fig. 4 in a schematic view an exemplary storage of determined states of operating parameters as a combination of states in a nested matrix according to an embodiment of the invention, and Fig.5. A schematic view of the process steps of a method according to an embodiment of the invention.

[0042] Fig. 1 shows in a schematic view a block diagram of a method for acquiring operating parameter data of a motor system according to an embodiment of the invention. Fig. 1 This illustrates the principle of a method according to an exemplary embodiment, which can be applied, for example, to an external rotor motor of a motor system or a fan. During operation of the motor system or fan, specifically during motor operation, predefined state change events of operating parameter 1 are determined based on state monitoring of the operating parameter 1 as the base parameter. That is, during motor operation, the state of operating parameter 1 is monitored over time, and the state of operating parameter 1 determined in the predefined evaluation intervals Δt is subjected to evaluation so that predefined or characteristic state changes of operating parameter 1 are detected. If no characteristic state change of operating parameter 1 is detected during the evaluation, motor operation continues unchanged.In the event of a characteristic state change being detected, a memory function is triggered. Thus, during the operation of the fan's motor system, characteristic state changes are detected via related operating parameters, and a memory function is triggered if necessary. The memory function is configured such that the state change of operating parameter 1, together with the corresponding state of operating parameter 2 and, if applicable, the states of other operating parameters, is stored as a state combination. A corresponding memory can be provided for this purpose in the motor system or the fan. Motor operation continues uninterrupted. As a result, relevant state combinations representing relevant operating parameter states can be detected and stored as a function of a state change of a base parameter, in this case, operating parameter 1.

[0043] Fig. 2 Figure 1 shows a schematic view of an algorithm for detecting a change of state event for a method for acquiring operating parameter data of a motor system according to an embodiment of the invention. Fig. 2 This illustrates an example of an underlying algorithm that can be used to detect a characteristic state change of the basic parameter. During engine operation, the basic parameter of the engine system is sampled at predefined evaluation intervals. The sampled state n(t) of the basic parameter at sampling time t is continuously compared with the previous state n(t-1) of the basic parameter at sampling time t-1 in order to detect a state change event due to a characteristic state change. If a state change is detected, a measure is triggered to store the detected state change event, whereby, in addition to the detected characteristic state change, the state of at least one additional parameter prevailing at the time of detection is also stored.

[0044] Thus, during operation, the change in an operating parameter, acting as a base parameter, is analyzed at defined evaluation intervals. The operating state of the engine system corresponding to the state change event is characterized by the extent of the quantitative change in the base parameter, i.e., the state change of the base parameter, and by the states of at least one additional parameter present during the state change event.

[0045] Fig. 3a und Fig. 3b Each diagram illustrates the states of an operating parameter as determined over time. The x-axes in Fig. 3a or in Fig. 3b Each represents the reference quantity, for example, time, to which the states of operating parameter 1 and operating parameter 2 are related. Instead of time, quantities such as current, power, or temperature, or combinations of these quantities, could also be used as the reference quantity. The y-axis in Fig. 3a or in Fig. 3b represents the possible states of operating parameter 1 and operating parameter 2, respectively, where the value range of operating parameters 1 and 2 is divided into classes 1 to 10.

[0046] Operating parameter 1 serves as a basic parameter, where the one in Fig. 3a The depicted curve of the basic parameter represents an exemplary curve of a speed parameter. In the Fig. 3a The evaluation interval Δt, illustrated with dashed lines, represents a change of state event in which a speed jump from class 4 to class 2 takes place.

[0047] Operating parameter 2 serves as an additional parameter, where the one in Fig. 3b The depicted course of the additional parameter represents an exemplary course of a temperature parameter. The detection time of the state change event of the basic parameter is shown in the diagram according to... Fig. 3b illustrated with a dashed vertical line. The state of the additional parameter prevailing at the time of detection of the state change event is thus shown in Fig. 3b assigned to grade 5. Thus, it illustrates Fig. 3 A change in rotational speed occurring within the evaluation interval Δt is recorded as a state change event, where the rotational speed parameter changes from state class 4 to state class 2. At the time of the state change event, the temperature parameter, which functions as an additional parameter, is recorded with state class 5.

[0048] Fig. 4 Figure 1 shows a schematic view of an exemplary storage of determined states of operating parameters as a state combination in a nested matrix according to an embodiment of the invention. Fig. 4 illustrates the storage of operating parameter data using the example curves of operating parameter 1 and operating parameter 2 according to Fig. 3 Data is stored by organizing the recorded operating states into defined classes within a nested matrix. A class is defined as a range-wise division of operating parameters into a defined range of values. The classification of the operating parameters can be defined equidistantly or non-linearly. In the main matrix, after a state change of operating parameter 1, the detected state change event is stored in such a way that the start and end classes—that is, the state of operating parameter 1 as the base parameter—before and after the state change are traceable. The number of entries in a matrix element describes the number of state change events characterized by the classification of operating parameter 1 as the base parameter.

[0049] In addition to the stored state change of the state change event (from class to class), that is, the state change of operating parameter 1 as the base parameter, the implemented program code also stores information about further operating parameters, namely the auxiliary parameters, which are linked to the state change event of the base parameter. Thus, for example, it can be stored as operating parameter data that a speed jump from class 4 to class 2 occurred for the base parameter (operating parameter 1) and that a temperature of class 5 was present at the time of the speed jump event for the auxiliary parameter (operating parameter 2).

[0050] Fig. 5 Figure 1 illustrates individual process steps of a method according to an embodiment of the invention in an overview. Operating parameter data of an engine system are acquired, whereby the states of operating parameters 1 and 2 are recorded during operation of the engine system. Operating parameter 1 represents a basic parameter and operating parameter 2 an additional parameter. Based on the state acquisition of operating parameter 1, which functions as the basic parameter, predefined state change events of operating parameter 1 are determined. Upon detection of a state change event of operating parameter 1, the state of operating parameter 2—prevailing at the time of detection—is acquired. The acquired state of operating parameter 2 is linked to the detected state change event and stored in a nested matrix.

[0051] The detected state change event and the recorded state of the additional parameter are stored as a state combination in the matrix. The state combination is stored in the matrix such that the initial state and the target state of the detected state change event are represented by the matrix's columns and rows. Information regarding the number of detected state events is stored in the matrix elements of the main matrix. Furthermore, information regarding the recorded states of the additional parameter, namely operating parameter 2, is stored in the matrix elements. Specifically, according to the [document / section]... Fig. 5In the example shown, the characteristic state change of operating parameter 1 from start class 4 to target class 2 is stored in the main matrix. The corresponding matrix element also stores the state of the additional parameter at the time of detection of the state change event, namely class 5 for operating parameter 2, which functions as an additional parameter.

[0052] Therefore, to reduce the amount of data to be stored, a selection method is implemented that determines whether the current operating point should be evaluated and / or stored. Consequently, storage-efficient acquisition of operating parameter data is achieved.

[0053] Regarding further advantageous embodiments of the method according to the invention, reference is made to the general part of the description and to the attached claims in order to avoid repetition.

[0054] Finally, it should be expressly pointed out that the exemplary embodiments of the inventive method and the inventive motor system and the inventive fan described above serve only to discuss the claimed teaching, but do not limit it to the exemplary embodiments.

Claims

1. Method for detecting operating parameter data of a motor system having an electric motor, preferably for a fan, wherein during operation of the motor system states of operating parameters are detected, wherein the operating parameters include a basic parameter and at least one additional parameter, wherein, based on a state detection of the basic parameter, state change events of the basic parameter are established, wherein, when a state change event of the basic parameter is detected, a state of the additional parameters is detected, wherein the detected state of the additional parameter is stored in a state linked with the detected state change event, wherein the detected state change event and the detected state of the state parameter and where applicable the detected state of the additional state parameter or the detected states of the additional parameters are stored as a state combination, the method is characterised in that state combinations which are produced as a result of detected state change events are stored by means of a preferably nested matrix with matrix elements, wherein the state combinations are stored in the matrix in such a manner that a distribution of the detected state change events of the basic parameter can be obtained, and wherein the state combinations are stored in the matrix in such a manner that via indexes of the matrix, preferably column indexes and row indexes of the matrix, starting states and target states of the state change events are depicted, and wherein in the matrix elements of the matrix information items relating to the number of the state events are stored.

2. Method according to claim 1, characterised in that, during the state detection of an operating parameter, a classification is taken as a basis, wherein a detected state of the operating parameter is associated with a class of the classification.

3. Method according to claim 1 or 2, characterised in that, during the detection of the state change event of the basic parameter, a state of one or more other additional parameters is detected, wherein the detected state of the additional state parameter or the detected states of the other additional parameters is / are stored in a state linked with the detected state change event.

4. Method according to any one of claims 1 to 3, characterised in that the storage of the state combination is carried out in accordance with the change of the basic parameter.

5. Method according to any one of claims 1 to 4, characterised in that the detected state change event is stored by the state combination in such a manner that the starting state and target state of the state change of the detected state change event of the basic parameter are stored in the state combination.

6. Method according to any one of claims 1 to 5, characterised in that information items relating to detected states of additional parameters are stored in the matrix elements of the matrix.

7. Method according to any one of claims 1 to 6, characterised in that the state of the basic parameter established by means of the state detection of the basic parameter is subjected to an evaluation at predeterminable evaluation intervals in order to detect a state change event of the basic parameter, wherein the evaluation can be implemented in such a manner that, when a predeterminable change threshold is exceeded, a state change event of the basic parameter is determined.

8. Method according to any one of claims 1 to 7, characterised in that the operating parameters comprise a speed parameter, temperature parameter, current parameter and / or voltage parameter, etcetera.

9. Method according to any one of claims 1 to 8, characterised in that a speed parameter is used as a basic parameter and / or in that a voltage parameter is used as a basic parameter.

10. Motor system for detecting operating parameter data and carrying out a method according to any one of claims 1 to 9, the motor system comprising: an electric motor having a stator and a rotor which can be rotated relative to the stator, and a control device having a processor and a memory, wherein the control device is configured in such a manner that during operation of the motor system states of operating parameters are detected, wherein the operating parameters comprise a basic parameter and at least one additional parameter, wherein the control device is further configured in such a manner that, based on a state detection of the basic parameter, state change events of the basic parameter are established, in that, when a state change event of the basic parameter is detected, a state of the additional parameter is detected, and in that the detected state of the additional parameter is stored in the memory in a state linked with the detected state change event.

11. Fan having a motor system according to claim 10 for carrying out a method according to any one of claims 1 to 9.