Method for data diagnosis of electric machine

Abstract

The invention relates to a method for data diagnosis of an electric machine (2) in a power supply network (4). Detecting an instantaneous value of a current and / or a voltage in a motor branch (6) of the power supply network (4) leading to the motor (2) by means of a detection device (8) of the motor management system; calculating an effective value from the detected instantaneous values by means of a processor (10) of the detection device (8); transmitting the calculated effective value from the detection device (8) to a control device (14) of the motor management system via a first data interface (12), the control device performing protection and control functions of the motor management system on the basis of the received effective value; storing the detected instantaneous value in a data memory (16) of the detection device (8); transmitting the stored instantaneous value from the detection device (8) to the control device (14) via the first data interface (12); transmitting the instantaneous value from the control device (14) to the evaluation device (18); and analyzing the instantaneous value by means of an analysis device (18) in order to detect a pattern in the instantaneous value, said pattern allowing a statement about the operating state of the electric machine (2) to be obtained.

Description

Technical Field

[0001] The present invention relates to a data diagnosis method for a motor, a motor management system, and a data diagnosis system for monitoring a motor. Background Art

[0002] Data diagnostic methods allow inferences to be drawn about the current and / or future state of a motor based on a rich data base of measured values, such as time series of current and / or voltage. Data diagnostic methods are also gaining increasing importance within the context of predictive maintenance (PDM), which increases plant availability.

[0003] A well-known data diagnostic method is Motor Current Signature Analysis (MCSA). Motors and machines driven by them, particularly rotating machines such as pumps, agitators, compressors, and fans, can enter various states during operation. These states can be identified based on the temporal variation of the motor current and / or motor voltage and / or motor active power. For motors, such states include broken rotor bars, stator winding faults, misalignment, and bearing damage. For pumps, such states include dry running, cavitation, and misalignment. For agitators, such states include the state of the agitator shaft or stirring mechanism and the viscosity of the stirred product.

[0004] The data diagnostic method requires a record of measured variables, such as the motor current, that is suitable for the method in terms of duration and sampling frequency. Currently, this recording is performed by installing temporary measuring devices, such as storage oscilloscopes, in the relevant motor branches or by installing separate, additional, permanently installed data acquisition equipment.

[0005] Installing temporary measuring devices on a running motor branch line always presents problems, both in terms of risks to the operation of the equipment itself, such as short circuits, and also risks to personnel, since work with applied voltage is not permitted.

[0006] Installing a separate, additional, fixed data acquisition device on the relevant motor branch requires additional investment and installation space. Currently, separate data acquisition devices are only provided for MCSA purposes and must be integrated into the motor branch in addition to the devices used for motor management. Summary of the Invention

[0007] The technical problem to be solved by the present invention is an improved possibility for diagnosing motor data.

[0008] This technical problem is solved according to the present invention by a method having the features of claim 1. The method is used for data diagnosis of a motor in a power supply network. The method comprises the following steps: detecting instantaneous values ​​of current and / or voltage in a motor branch of the power supply network leading to the motor by a detection device of a motor management system. A further step is calculating effective values ​​from the detected instantaneous values ​​by a processor of the detection device. A further step is transmitting the calculated effective values ​​from the detection device to a control device of the motor management system via a first data interface. The control device performs protection and control functions of the motor management system based on the received effective values. A further step is storing the detected instantaneous values ​​in a data memory of the detection device. Once the storage process is complete, the detection device can send a message to the control device indicating that a new data set is available. A further step is transmitting the stored instantaneous values ​​from the detection device to the control device via the first data interface. A further step is transmitting the instantaneous values ​​from the control device to an evaluation device. A further step is analyzing the instantaneous values ​​by the evaluation device to detect patterns in the instantaneous values ​​that allow conclusions to be drawn about the operating state of the motor.

[0009] This technical problem is solved according to the invention by a motor management system having the features of claim 10. The motor management system is configured to provide protection and control functions for a motor in a power supply network. The motor management system has the following system components: - a detection device, which is configured to detect instantaneous values ​​of current and / or voltage in a motor branch of the power supply network leading to the motor. - a processor of the detection device, which is configured to calculate effective values ​​from the detected instantaneous values. - a control device, which is configured to perform the protection and control functions of the motor management system based on the received effective values. - a first data interface, which is configured to transmit the calculated effective values ​​from the detection device to the control device. - a data memory of the detection device, which is configured to store the detected instantaneous values, wherein the first data interface is also configured to transmit the stored instantaneous values ​​from the detection device to the control device.

[0010] The motor management system's devices are therefore enhanced to perform instantaneous value data acquisition suitable for data diagnosis. For this purpose, the acquisition device includes a data memory, and the firmware of the acquisition device and the control device are adapted accordingly to enable data acquisition and transmission of the acquired instantaneous values ​​to the evaluation device. If data diagnosis is required, data acquisition and transmission of the acquired instantaneous values ​​to the evaluation device can be activated.

[0011] This problem is solved according to the invention by a data diagnostic system having the features of claim 11. The data diagnostic system is used for data diagnostics of electric machines in a power supply network. The data diagnostic system comprises the following system components: a motor management system as described above; an evaluation device configured to analyze instantaneous values ​​to detect patterns in the instantaneous values ​​that allow conclusions to be drawn about the operating state of the electric machine; and a second data interface configured to transmit the instantaneous values ​​from the control device to the evaluation device.

[0012] Motor management systems protect motor branches through a combination of various multi-stage and delayable protection and monitoring functions. By monitoring electrical variables, exceeding warning limits can be used to identify abnormalities in operating characteristics at an early stage. Typical motor management system functions include: current-dependent electronic overload protection, thermistor motor protection, phase failure / asymmetry protection, blocking protection, monitoring of motor current with adjustable limit values, voltage and power monitoring, cosφ monitoring (motor no-load / load shedding), ground fault monitoring, temperature monitoring (e.g. via Pt100 / Pt1000), and monitoring of operating hours, downtimes, and the number of starts.

[0013] Siemens' proprietary motor management system is called SIMOCODE pro (SIMOCODE = SIRIUS Motor Management and Control Device). It provides extensive operating, service, and diagnostic data, helping to identify impending faults early and prevent them through preventive measures. In the event of a fault, the fault can be diagnosed, located, and eliminated in the shortest possible time—with minimal or no equipment downtime. The operating data provided includes the motor switching state (derived from the current in the main circuit), all phase currents, all phase and line voltages, active power, apparent power and power factor, phase asymmetry and phase sequence, ground fault current, frequency, time to trigger, motor temperature, and remaining cooling time. Service data provided includes motor operating time, motor downtime, number of motor starts, number of overload triggers, intervals for forced test release circuits, consumed energy, and internal notes stored in the device. Diagnostic data provided includes a large number of detailed early warning and fault messages, an internal error log with a time stamp, and time stamps for selectable status, warning, or fault messages. SIMOCODE pro is described in the SIMOCODE pro system manual "Industrielle Schalttechnik, Motormanagement- und Steuergeräte, SIMOCODE pro", Edition 02 / 2023, A5E40507475001A / RS-AG / 007, published by Siemens AG, Smart Infrastructure, Electrical Products, PO Box 100953, 93009 Regensburg, Germany, as of 03 / 2023.

[0014] Installed in a motor control center or low-voltage switchgear, SIMOCODEpro serves as an intelligent link between the higher-level automation system and the motor branch. It integrates: multifunctional electronic motor protection, independent of the automation system; integrated control functions that replace motor control hardware; detailed operating, service, and diagnostic data; fail-safe shutdown up to SIL3; open communication via PROFINET, ModbusTCP, and EtherNet / IP; and parameterization via the SIMOCODE ES software package (TIA Portal). Only main circuit switches and short-circuit protection devices (relays / contactors, power disconnect switches, and fuses) are required.

[0015] The present invention is based on the idea that a motor management device installed in a motor branch is enhanced so that, in addition to motor management functions (particularly overload protection), it also performs a range of data acquisition, so that the acquired measured values ​​are suitable for data diagnostics of the motor, such as condition monitoring, MCSA, etc. In this way, there is no need to install a separate, additional, permanently installed data acquisition device in the relevant motor branch: the required investment is significantly reduced, and no additional installation space is required.

[0016] The essential difference from the prior art is that the hardware and firmware required for detecting, storing, and transmitting the recorded measured values ​​are integrated into the equipment already required or used for protecting and controlling the motor branch. Essential components, such as current and / or voltage detection, as well as digital processing and transmission, are already part of motor protection systems, such as Siemens' proprietary motor management system SIMOCODEpro. According to the present invention, these components are expanded with suitable functions for storage and transmission.

[0017] The detection device and the control device therefore provide both a function of pole management for the motor based on effective values ​​and a function of data diagnosis for the motor based on instantaneous value analysis.

[0018] The recorded measured values ​​of the current and voltage of the relevant motor branches form the basis for data diagnosis. Whether only the current or the voltage is detected depends on the desired evaluation method. Recording the instantaneous current value is sufficient for MCSA, for example, at a sampling frequency of 3.2 / 4.2 kHz (at a 50 / 60 Hz grid frequency). However, it is possible to require voltage values ​​in addition to the current values, especially if the temporal variation of the active power is of interest.

[0019] Advantageous embodiments and developments of the invention are given in the dependent claims. The method according to the invention can be developed in accordance with the dependent device claims, and vice versa.

[0020] According to a preferred design, the analysis is performed by MCSA. For MCSA, the minimum duration of a sampling sequence is approximately 5 seconds; the present invention can detect sampling sequences whose length far exceeds the instantaneous value of this minimum length.

[0021] According to a preferred design, the storage of the detected instantaneous values ​​in the data memory and the transmission of the stored instantaneous values ​​from the detection device to the control device are performed asynchronously. The process can be as follows: A sampling sequence is initiated by a triggering event, wherein the instantaneous values ​​detected by the detection device are stored in the data memory of the detection module. The detected instantaneous values ​​are stored in the data memory of the detection device. Once the data memory of the detection device is full, the storage of the detected instantaneous values ​​in the data memory of the detection module ends. Subsequently, the instantaneous values ​​stored in the data memory are transmitted to the control device in blocks, for example, 200 kB blocks, until the entire contents of the data memory have been transmitted. Only then can the next sampling sequence be initiated.

[0022] According to a preferred design, the point in time at which the detected instantaneous values ​​are stored in the data memory, i.e., the sampling sequence, is initiated by an external command or by the motor state. The external command can be sent by a control center or control unit. It is also possible that the analysis device determines during data diagnosis that it requires additional measured values ​​for a specific motor state in order to confirm a pattern in the data. In this case, the analysis device can send a corresponding instruction to the control device, which can instruct the detection device to initiate the sampling sequence at the desired time. The triggering event can also be defined by the motor state, for example, at motor startup, 10 seconds after motor startup, once every hour, etc.

[0023] According to a preferred embodiment, the storage of the detected instantaneous values ​​in the data memory, ie the sampling sequence, begins only when the data memory is empty, thereby ensuring that the maximum data memory is provided for the instantaneous values ​​of the sampling sequence.

[0024] According to a preferred design, the data memory is an EEPROM of 1 to 10 megabytes. Advantageously, the investment cost for a data memory of this size is relatively low.

[0025] According to a preferred embodiment, the calculated effective value and the stored instantaneous value are transmitted via the first data interface via an electrical RS485 connection. An advantage here is that this standard is very common and has a lot of experience.

[0026] According to a preferred embodiment, the stored instantaneous values ​​are transmitted in blocks via the first data interface. The advantage here is that the transmission capacity of the first data interface can be optimally utilized by determining the block size.

[0027] According to a preferred embodiment, the instantaneous value is transmitted from the control device to the analysis device in a wired manner via a second data interface in the form of an Ethernet interface of the control device according to the OPC UA standard. This has the advantage that the standard is very common and has a wealth of experience.

[0028] According to a preferred design, the analysis device is an edge device, or the analysis device is provided in a cloud infrastructure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above characteristics, features and advantages of the present invention and the methods and means for achieving the above characteristics, features and advantages of the present invention will be more clearly understood through the following embodiments further illustrated with reference to the accompanying drawings. The accompanying drawings are schematic and not to scale:

[0030] Figure 1 A known motor management system is shown;

[0031] Figure 2 A data diagnosis system is shown;

[0032] Figure 3 A flow chart of a method for monitoring an electric machine in a power supply network is shown. DETAILED DESCRIPTION

[0033] Figure 1 A known motor management system is described. A three-phase power supply network 4, for example an AC power grid, has a main circuit 1 with three phase lines L1, L2, and L3. At a connection point 3 of the main circuit 1, a three-phase motor branch 6 branches off from the main circuit 1, through which electrical energy is transmitted to the motor 2. The motor can be a low-voltage AC asynchronous motor or any other electric drive motor.

[0034] In the energy transmission direction from connection point 3 to motor 2, a switch 24 and detection device 8 are connected in series in motor branch 6. Switch 24 switches all three phase lines L1, L2, and L3 of motor branch 6. Switch 24 can be designed as a mechanically or electronically switched switch, such as a relay / contactor or a power semiconductor switch. Switch 24 can be a power circuit breaker, such as an MCCB (Moulded Case Circuit Breaker), which interrupts the current in motor branch 6 in the event of a fault, such as a short circuit or overload, to prevent damage.

[0035] The detection device 8 is used to detect the current and / or voltage values ​​in the phase lines L1, L2, L3 of the motor branch 6. The voltages of the phase lines L1, L2, L3 can be measured relative to each other, relative to the neutral line or another defined potential, such as ground potential. The detection device 8 has a processor 10, which converts the measured instantaneous values ​​of the current and / or voltage into effective values. The effective values ​​are sent from the detection device 8 to the control device 14 via the first data interface 12. For example, the transmission of the effective values ​​can be carried out based on SPI (SPI = Serial Peripheral Interface), for example, one data block every 30 ms. As soon as enough effective values ​​for the block to be transmitted have been calculated, they are transmitted; therefore, no buffer memory is required in the detection device 8.

[0036] Control device 14 includes a processor 26 that evaluates the effective value. If the evaluation of the effective value performed by control device 14 indicates a fault or other undesirable state of power supply network 4, control device 14 sends a control signal to switch 24 via control line 28. If the received control signal triggers switch 24 to interrupt, it interrupts the current through phase lines L1, L2, and L3 of motor branch 6, thereby protecting motor 2 from damage.

[0037] The detection device 8 and the control device 14 are components of a motor management system, which performs protection and control functions for the motor 2 based on the effective values ​​of the current and / or voltage.

[0038] Figure 2 A data diagnosis system for data diagnosis of the electric machine 2 will be described. Figure 1 A motor management system is installed in the three-phase power supply network 4, which has a detection device 8 and a control device 14 for providing protection and control functions for the motor 2. Figure 1 The description given for the three-phase power supply network 4 also applies here, since Figure 2 The data diagnostic system is also installed Figure 1 The motor management system described in and provides its functionality. Figure 2 The description quoted about Figure 1 Instructions given.

[0039] Apart from Figure 1 In addition to the components and functions described in , the data diagnosis system has other components and functions described below.

[0040] The detection device 8 of the motor management system is configured to detect instantaneous values ​​of the current and / or voltage in the motor branch 6 of the power supply network 4 leading to the motor 2 and has both a processor 10 and a data memory 16 .

[0041] The control device 14 of the motor management system performs the protection and control functions of the motor management system based on the received effective values. The control device is not only connected to the switch 24 of the motor branch 6 via a control line 28, but is also connected to the analysis device 18 via a second data interface 20. The analysis device 18 can be an edge device and / or provided in a cloud infrastructure 22.

[0042] and Figure 1 Like the motor management system described in [1], the data diagnostic system also provides motor management system functions. Specifically, instantaneous values ​​of the current and / or voltage in the motor branch 6 are detected by a detection device 8, effective values ​​are calculated from the detected instantaneous values ​​by a processor 10 of the detection device 8, and the calculated effective values ​​are transmitted from the detection device 8 to the control device 14 via a first data interface 12. The control device performs the protection and control functions of the motor management system based on the received effective values. However, in the data diagnostic system, the detected instantaneous values ​​are stored in a data memory 16 of the detection device 8, transmitted from the detection device to the control device 14 via the first data interface 12, and from the control device 14 to an analysis device 18. The instantaneous values ​​are analyzed in the analysis device 18 to detect patterns in the instantaneous values ​​that allow statements about the motor operating state to be drawn, i.e., a method known as data diagnostics is performed.

[0043] If, during data analysis, analysis device 18 determines that a problem exists with the motor, analysis device 18 can send a signal to control device 14, which triggers control device 14 to send a control signal to switch 24 via control line 28. If the received control signal triggers switch 24 to interrupt, it interrupts the current through phases L1, L2, and L3 of motor branch 6. Once motor 2 has come to a standstill due to a lack of energy, it is maintained to resolve the identified problem.

[0044] The following are examples of recording instantaneous values. These examples are only used to help those skilled in the art better understand the concept. These examples are not to be interpreted as limiting in any way; any other suitable design is also possible.

[0045] According to a first example, the instantaneous values ​​of the current and / or voltage are recorded at a sampling frequency of 3.2 kHz (at a 50 Hz grid frequency) or at a sampling frequency of 4.2 kHz (at a 60 Hz grid frequency). A sampling frequency of 3.2 kHz (4.2 kHz) means 3200 (4200) sampling processes per second. Therefore, at a 50 Hz grid frequency, 3200 / 50 = 64 samples are collected per grid cycle, and at a 60 Hz grid frequency, 4200 / 60 = 70 samples are collected per grid cycle.

[0046] According to the second example, the instantaneous values ​​of the current and / or voltage are recorded at a sampling frequency of 3.2 kHz (at a 50 Hz grid frequency) or at a sampling frequency of 3.84 kHz (at a 60 Hz grid frequency). A sampling frequency of 3.2 kHz (3.84 kHz) means 3200 (3840) sampling processes per second. Therefore, at a 50 Hz grid frequency, 3200 / 50 = 64 samples are taken per grid cycle, and at a 60 Hz grid frequency, 3840 / 60 = 64 samples are taken per grid cycle. Therefore, in the second example, 64 samples are taken per grid cycle at both 50 Hz and 60 Hz grid frequencies.

[0047] These sampling frequencies are applicable to the use of measured values ​​in the motor management system embodied by the detection device 8 and the control device 14, and also to the use of measured values ​​in the data diagnosis system embodied by the detection device 8, the control device 14, and the analysis device 14. Therefore, the detection device 8 and the control device 14 provide functionality for the motor management system based on effective values, and also provide functionality for the data diagnosis system based on instantaneous values.

[0048] The data memory 16 of the detection device 8 can have a storage capacity in the single-digit MB range, for example, 1 to 9 MB. The instantaneous value can be transmitted from the detection device 8 to the control device 14 via RS584, for example, at 1.5 MBit / sec. The instantaneous value can be transmitted from the detection device 8 to the control device 14 in parallel and synchronously with the effective value transmission from the detection device 8 to the control device 14. The instantaneous value can be transmitted from the control device 14 to the analysis device 14 via Ethernet with OPC UA.

[0049] Figure 3 A flow chart of a method for monitoring an electric machine 2 in a power supply network 4 is shown. In a first step 31 , a detection device 8 of a motor management system detects instantaneous values ​​of a current and / or voltage in a motor branch 6 of the power supply network 4 leading to the electric machine 2 .

[0050] The following example estimate can be made: For example, a sample value has a data size of 4 bytes. If, in a three-phase network with three phases L1, L2, and L3, each detection process (sampling) detects the current value I and voltage value U in each phase, the amount of data obtained per detection process is: 2 [2 sample values: I and U] x 3 [3 phases] x 4 bytes [data size of one sample value] = 24 bytes. At a sampling frequency of 3.2 kHz, this means a data volume of 24 bytes x 3.2 kHz = 76.8 kByte / s.

[0051] In a second step 32, processor 10 of detection device 8 calculates an effective value from the detected instantaneous value. In a third step 33, the calculated effective value is transmitted from detection device 8 via first data interface 12 to control device 14 of the motor management system. The control device performs the protection and control functions of the motor management system based on the received effective value. In a fourth step 34, the detected instantaneous value is stored in data memory 16 of detection device 8.

[0052] The following exemplary estimation can be made: For example, data memory 16 has a data storage capacity of 5 MB. Since 76.8 kByte of instantaneous values ​​are detected per second, a sampling sequence with a duration of 5 MBs / 0.0768 MB=65 s can be stored in data memory 16.

[0053] In a fifth step 35 , the stored instantaneous value is transmitted from the detection device to the control device 14 via the first data interface 12 .

[0054] The following example estimate can be made: For example, if data transmission is based on the RS485 protocol, the transmission speed is 1.5 Mbit / s = 0.1875 MB / s. Therefore, the transmission of a complete 5 MB data memory takes approximately 5 MBs / 0.1875 MB = 26.7 seconds.

[0055] In a sixth step 36 , the instantaneous value is transmitted from the control device 14 to the evaluation device 18 .

[0056] In a seventh step 37 , the instantaneous values ​​are analyzed by the evaluation device 18 in order to detect patterns in the instantaneous values ​​which allow statements to be drawn about the operating state of the electric machine.

[0057] Because the instantaneous value-based motor management and analysis functions are performed in parallel, the above steps do not necessarily need to be understood in chronological order. The first step 31 is the basis for both functions: motor management and instantaneous value-based analysis. However, the second and third steps 32 and 33, which involve the motor management function, can be performed in parallel with the fourth to seventh steps 34 to 37, which involve instantaneous value-based analysis.

[0058] Reference Signs List

[0059] 1 Main circuit

[0060] 2 motors

[0061] 3 connection points

[0062] 4 Power supply network

[0063] 6 Motor branch

[0064] 8 Testing Equipment

[0065] 10 8 processor

[0066] 12 First data interface

[0067] 14 Control Equipment

[0068] 16 Data Memory

[0069] 18 Analytical Equipment

[0070] 20 Second data interface

[0071] 22 Cloud Infrastructure

[0072] 24 switches

[0073] 26 14 processor

[0074] 28 control lines

[0075] 31 First Step

[0076] 32 Step 2

[0077] 33 Step 3

[0078] 34 Step 4

[0079] 35 Step 5

[0080] L1 first phase line

[0081] L2 Second phase line

[0082] L3 third phase line.

Claims

1. A method for data diagnosis of an electric machine (2) in a power supply network (4), - detecting the instantaneous value of the current and / or voltage in the motor branch (6) of the power supply network (4) leading to the motor (2) by means of a detection device (8) of the motor management system; - calculating an effective value from the detected instantaneous value by a processor (10) of the detection device (8); - transmitting the calculated effective value from the detection device (8) to the control device (14) of the motor management system via the first data interface (12), the control device performing the protection and control functions of the motor management system based on the received effective value; - storing the detected instantaneous value in a data memory (16) of the detection device (8); - transmitting the stored instantaneous value from the detection device (8) to the control device (14) via the first data interface (12); - transmitting the instantaneous value from the control device (14) to the analysis device (18); and The instantaneous values ​​are analyzed by an analysis device (18) in order to detect patterns in the instantaneous values, which patterns allow statements to be drawn about the operating state of the electric machine (2).

2. The method according to claim 1, in, The analysis was performed by MCSA.

3. The method according to claim 1, in, The storage of the detected instantaneous value in the data memory (16) and the transmission of the stored instantaneous value from the detection device (8) to the control device (14) are performed asynchronously.

4. The method according to claim 1, in, The time point for starting to store the detected instantaneous value in the data memory (16) is triggered by an external command or a motor state.

5. The method according to claim 1, in, When the data memory (16) is empty, the detected instantaneous value starts to be stored in the data memory (16).

6. The method according to claim 1, in, The data memory (16) is an EEPROM having 1 to 10 Mbytes.

7. The method according to claim 1, in, The calculated effective value and the stored instantaneous value are transmitted via the first data interface (12) via an electrical RS485 connection.

8. The method according to any one of the preceding claims, in, The stored instantaneous values ​​are transmitted in blocks via a first data interface (12).

9. The method according to any one of the preceding claims, in, The instantaneous value is transmitted from the control device (14) to the evaluation device (18) in a wired manner via a second data interface (20) in the form of an Ethernet interface of the control device (14) in accordance with the OPC UA standard.

10. A motor management system configured to provide protection and control functions for a motor (2) in a power supply network (4), the motor management system having: - a detection device (8) configured to detect the instantaneous value of the current and / or voltage in the motor branch (6) of the power supply network (4) leading to the motor (2); - a processor (10) of the detection device (8) configured to calculate an effective value from the detected instantaneous value; - a control device (14) configured to perform protection and control functions of the motor management system based on the received effective values; a first data interface (12) configured to transmit the calculated effective value from the detection device (8) to the control device (14); A data memory (16) of the detection device (8) configured to store the detected instantaneous values, wherein the first data interface (12) is further configured to transmit the stored instantaneous values ​​from the detection device (8) to the control device (14).

11. A data diagnostic system for monitoring a motor (2) in a power supply network (4), comprising - The motor management system according to claim 10, an analysis device (18) configured to analyze the instantaneous values ​​in order to detect patterns in the instantaneous values, said patterns allowing statements to be drawn about the operating state of the electric machine (2); A second data interface (20) is configured to transmit instantaneous values ​​from the control device (14) to the analysis device (18).

12. The data diagnosis system according to claim 11, in, The analysis device (18) is an edge device or provided in a cloud infrastructure (22).

Images