Data acquisition processing unit for the electric machine of a machine, electric machine and machine having such an electric machine

Abstract

The present invention relates to a data acquisition and processing unit (14) for a motor (2) of a machine (1), a motor (2), and a machine (1). The data acquisition and processing unit (14) has: at least one analog input interface (16) for connection to sensors (9, 10, 11, 13) integrated in the motor (2); at least one digital input interface (17) for connection to sensors (12) or functional units integrated in the motor (2); an electronic computing storage unit (18) for storing and processing data provided through the input interfaces (16, 17); an output interface (20) for outputting the stored and / or processed data; and a housing in which the input interfaces (16, 17), the electronic computing storage unit (18), and the output interface (20) are housed.

Description

Technical Field

[0001] The present invention relates to a data acquisition and processing unit for a motor used in a machine, a motor, and a machine. Background Technology

[0002] Electric motors are widely used sub-units / components in machines or equipment (such as machine tools, packaging machines, air compressors, printing presses, equipment for conveying technology, equipment for food production, centrifuges, etc.). Typically, the machine itself has a machine controller, which can also communicate with the motor installed within the machine. As prior art, it is known that such motors for machines are connected to the machine controller via cables to control the motor itself and to collect sensor data from the motor (e.g., motor bearing temperature, motor temperature, speed). However, as the number of sensors in the motor increases, this leads to increased space requirements and more complex cabling. Furthermore, the amount of data to be transmitted increases, thus increasing the workload of the machine controller. Summary of the Invention

[0003] The object of this invention is to provide a particularly advantageous connection scheme for transmitting data between a motor and a machine controller.

[0004] This objective is achieved by a data acquisition and processing unit having the features described in claim 1. Advantageous embodiments are described in the dependent claims of claim 1.

[0005] The data acquisition and processing unit for a machine motor according to the present invention has at least one analog input interface for connection to a sensor integrated in the motor, at least one digital input interface for connection to a sensor or functional unit integrated in the motor (e.g., a release unit for releasing a tool clamped in a drive motor of a machine tool), an electronic computing storage unit for storing and processing data provided through the input interface, an output interface for outputting the stored and / or processed data, and a housing in which the input interface, the electronic computing storage unit, and the output interface are disposed.

[0006] This type of data acquisition and processing unit enables a particularly advantageous connection scheme for transmitting data between the machine's motor and its controller. Data generated by the motor's sensors and functional units is centrally collected in this unit and forwarded to the machine's controller in an aggregated manner—i.e., via the output interface. This simplifies and reduces the required interface between the motor and the controller. The required cable connections are correspondingly reduced, and space requirements are minimized. Furthermore, the received data can be stored and / or further processed in the electronic computing and storage unit. In this way, the amount of data that needs to be transmitted to the machine controller can be reduced. By housing the input interface, electronic computing and storage unit, and output interface, these components are protected from mechanical forces.

[0007] In a preferred embodiment, the housing is designed as a hollow cylindrical shell. In this way, the required space requirement is further reduced.

[0008] In another advantageous embodiment, an additional sensor, particularly a vibration sensor with three measuring axes, is also arranged within the housing. The sensor data is similarly stored and / or processed by the electronic computing and storage unit. If this additional sensor is designed as a vibration sensor, it can record and / or monitor the vibration of the motor during operation, and also detect shocks experienced by the motor in a disassembled state (e.g., during motor transport). It can also detect the vibration or impact of the data acquisition and processing unit itself.

[0009] Advantageously, the housing is connected to the motor via a flange connection. This achieves a particularly stable connection. The flange connection is especially advantageous if the data acquisition and processing unit is equipped with a vibration sensor, as this ensures that vibrations generated in the motor are reliably transmitted to the data acquisition and processing unit and detected by the vibration sensor there.

[0010] Furthermore, both the input and output interfaces can be encapsulated in potting material within the bottom region of the hollow cylindrical shell. If the data acquisition and processing unit is equipped with a sensor, this sensor is also advantageously encapsulated in potting material. This encapsulation enables particularly stable component positioning and ensures reliable operation of the sensor within the data acquisition and processing unit. For example, if the sensor is designed as a vibration sensor, encapsulation in potting material allows vibration to be reliably transmitted to the vibration sensor, resulting in particularly accurate measurement results.

[0011] In one advantageous embodiment, the housing is made of metal, particularly stainless steel. In this way, particularly stable and continuous protection against mechanical forces can be achieved.

[0012] The output interface can be designed as a bidirectional interface, especially one compliant with the IO-Link standard. This enables data transmission not only from the motor to the machine controller but also from the machine controller to the motor. Therefore, it further enhances the functionality of the data acquisition and processing unit and reduces the need for additional interfaces between the motor and the machine controller.

[0013] In one advantageous embodiment, the data acquisition and processing unit is configured to receive data from the machine controller via a bidirectional communication link, and the electronic computing and storage unit is configured to store and process data provided through the input interface and / or sensor data from sensors arranged in the housing based on the data received via the bidirectional communication link. In other words, the data acquisition and processing unit has a feedback function that adjusts the method of storing or processing the data provided through the input interface and / or sensor data from sensors arranged in the housing according to the type of machine to which the data acquisition and processing unit is connected via the bidirectional communication link.

[0014] In another advantageous embodiment, the electronic computing storage unit is configured to, on the one hand, store and / or process static and / or operating data of the motor, and on the other hand, compare the stored and / or processed data with limits, and output an alarm message when one of the limits is reached. In this way, the data acquisition and processing unit can be flexibly applied and forward the determined / processed data when necessary.

[0015] In another advantageous embodiment, the data acquisition and processing unit further includes an update unit designed to modify the static data and / or operating data of the drive motor stored in the electronic computing storage unit.

[0016] Furthermore, the object of the present invention is to provide a motor for a machine and a machine having a particularly advantageous connection scheme for transmitting data between the motor and the machine controller.

[0017] The motor for a machine according to the present invention comprises: a motor shaft; a motor body in which the motor shaft is rotatably supported; at least one sensor for detecting sensor parameters (e.g., temperature, speed) of the motor; and a data acquisition and processing unit, wherein one of the input interfaces is connected to the sensor for detecting the sensor parameters of the motor.

[0018] Advantageously, the electric spindle also includes: multiple additional sensors and / or functional units, particularly temperature sensors for determining the temperature of one or more motor bearings, stator temperature, rotor temperature, or coolant temperature; and sensors / functional units for determining position, determining axial displacement of the motor assembly, monitoring planarity, monitoring and releasing the tool connected to the motor, determining the rotational speed and / or rotation angle of the motor shaft, and determining and monitoring hydraulic pressure. These sensors / functional units are connected to a data acquisition and processing unit, allowing the electronic computing and storage units of the data acquisition and processing unit to store and / or process the data provided by the sensors / functional units through the input interface.

[0019] The machine according to the invention includes a motor, a data acquisition and processing unit, and a machine controller. A bidirectional communication link, particularly a communication link conforming to the IO-Link standard, connects the machine controller to the output interface of the data acquisition and processing unit. Attached Figure Description

[0020] The present invention will be further described with reference to the embodiments shown in the figures. Wherein:

[0021] Figure 1 A schematic diagram of a machine with a machine controller and a motor is shown, the motor having a data acquisition and processing unit with a farad connection;

[0022] Figure 2 It shows Figure 1 A schematic side view of the data acquisition and processing unit in the middle; and

[0023] Figure 3 It shows Figure 1 A schematic block diagram of the data acquisition and processing unit and its interaction with other units of the motor and the machine controller. Detailed Implementation

[0024] Figure 1 Machine 1 is schematically shown. Machine 1 has a motor 2. For example, motor 2 can be a drive motor or a servo motor. Motor 2 has a motor shaft 3, which may have, for example, a transmission mechanism or a mounting base / tool ​​holder for a cutting tool (e.g., a drilling tool or a milling tool) on its end side. Motor shaft 3 is rotatably supported in a motor base 6 by bearings 4 and 5. Furthermore, motor 2 has a rotor 7 arranged on motor shaft 3 and a stator 8 arranged in motor base 6 for driving motor shaft 3.

[0025] In addition, the electric spindle 1 is equipped with a first temperature sensor 9 for detecting the temperature of bearing 4, a second temperature sensor 10 for detecting the temperature of bearing 5, a third temperature sensor 11 for detecting the temperature of stator 8, and a fourth temperature sensor 12 for detecting the temperature of the coolant flowing through the motor 2. A speed sensor 13 is used to detect the rotational speed and / or rotation angle of the motor shaft 3. Temperature sensors 9, 10, 11, and 12, as well as speed sensor 13, are examples of sensors used to detect sensor parameters of the motor 2.

[0026] The data acquisition and processing unit 14 is connected to the motor base 6 via flange connection part 15. Temperature sensors 9 to 12 and speed sensor 13 are connected via signal lines (in... Figure 1 (shown in dashed line) is connected to the data acquisition and processing unit 14, thereby enabling data communication between these components.

[0027] Figure 2 and Figure 3 The data acquisition and processing unit 14 is described in more detail. The data acquisition and processing unit 14 has multiple analog input interfaces 16 and digital input interfaces 17. In the current embodiment, the digital input interface 17 is designed to conform to the RS485 standard. Temperature sensors 9 to 12 and speed sensor 13 are connected to the data acquisition and processing unit 14 through these input interfaces 16 and 17.

[0028] The data acquisition and processing unit 14 also includes an electronic computing storage unit 18 for storing and processing data provided through input interfaces 16 and 17, a vibration sensor 19, and an output interface 20. The vibration sensor 19 is an example of a sensor arranged in the housing.

[0029] The vibration sensor 19 is connected to the computing storage unit 18, so that the sensor data of the vibration sensor can be stored and / or processed by the computing storage unit 18.

[0030] Output interface 20 is designed as a bidirectional digital interface and is used to output data stored and / or processed by computing storage unit 18 to machine controller 21 of machine 1 via bidirectional communication link 22, and to receive data sent from machine controller 21 to data acquisition and processing unit 14. In the current embodiment, output interface 20 is designed as an interface conforming to the IO-Link standard.

[0031] The data acquisition and processing unit 14 described above is housed in a hollow cylindrical housing made of stainless steel. Here, input interfaces 16 and 17 are encapsulated in potting material in the area of ​​the bottom surface of the housing. Output interface 20 is encapsulated in potting material in the area of ​​the top surface of the housing—that is, in the area opposite to input interfaces 16 and 17. Vibration sensor 19 and computing storage unit 18 are also encapsulated in potting material.

[0032] Data generated by the functional units of the sensors—reference numerals 9, 10, 11, 12, 13 in this embodiment—and / or the motor 2 are transmitted to the data acquisition and processing unit 14 via input interfaces 16 and 17. Here, this data—along with the data from the vibration sensor 19—is stored and further processed by the computing storage unit 18. Specifically, the computing storage unit 18 stores not only static data of the motor 2 and / or the data acquisition and processing unit 14 (e.g., identification number, information about the installation location or operator), but also operational data of the motor 2 and / or the data acquisition and processing unit 14 (e.g., status, temperature, rotational speed, clamping status, running time). This data is also further processed by the computing storage unit 18, and, if necessary, compressed and / or converted into a displayable form (e.g., a histogram) using appropriate methods.

[0033] The computing storage unit 18 may also store limit values ​​or warning values ​​for specific parameters (e.g., temperature limit, vibration limit, speed limit), and the computing storage unit 18 may be programmed to compare the stored and / or processed data with the limit values ​​or warning values, and output an alarm message when one of the limit values ​​or warning values ​​is reached.

[0034] Finally, the stored and / or processed data is output to the machine controller 21 of machine 1 through output interface 20 and communication link 22.

[0035] The data acquisition and processing unit 14 also has an additional interface 23 for transmitting the stored and / or processed data outside the machine controller 21. In this way, data from the electric spindle 1 can be transmitted directly, bypassing the machine controller 21.

[0036] In the current embodiment, sensors 9, 10, 11, and 13 of the electric spindle 1 are connected to the data acquisition and processing unit 14 via analog input interface 16, while sensor 12 is connected to the data acquisition and processing unit 14 via digital input interface 17. Alternatively, all or several of sensors 9, 10, 11, and 13 may be connected to the data acquisition and processing unit 14 via digital input interface 17.

[0037] Not explicitly shown in the figure is the update unit. This update unit is designed to modify the static data of the motor 2 stored in the computing storage unit 18 (such as identification number, information about the installation location or operator) as needed, and in particular, to replace the data stored there with updated static data. For this purpose, the update unit can access the computing storage unit 18 remotely via a communication network (wired or wireless).

[0038] In the current embodiment, the digital input interface 17 is designed to conform to the RS485 standard. However, it is also possible for several or all of the input interfaces 17 to be designed to conform to other standards.

[0039] In the current embodiment, the machine 1 has one motor 2. However, it is also possible for the machine 1 to have multiple motors 2, wherein each motor 2 is equipped with a separate data acquisition and processing unit 14.

[0040] List of reference numerals

[0041] 1 machine

[0042] 2 motors

[0043] 3 motor shafts

[0044] 4 and 5 bearings

[0045] 6 motor base

[0046] 7 rotors

[0047] 8 stators

[0048] Temperature sensors 9, 10, 11, and 12

[0049] 13 speed sensor

[0050] 14 Data Acquisition and Processing Units

[0051] 15 Flange Connection

[0052] 16 Analog Input Interfaces

[0053] 17 Digital Input Interfaces

[0054] 18 electronic computing and storage units

[0055] 19 vibration sensors

[0056] 20 output interfaces

[0057] Machine controller of 21 machines

[0058] 22 communication links

[0059] 23 Other interfaces

Claims

1. A data acquisition and processing unit (14) for a motor (2) of a machine (1), the unit having: - At least one analog input interface (16) for connecting to sensors (9, 10, 11, 13) integrated in the motor (2). - At least one digital input interface (17) for connection to a sensor (12) or functional unit integrated in the motor (2). - Electronic computing storage unit (18) for storing and processing data provided through input interfaces (16, 17); - Output interface (20) for outputting stored and / or processed data; - The housing, input interfaces (16, 17), electronic computing storage unit (18) and output interface (20) are housed in the housing.

2. The unit according to claim 1, further comprising a sensor, particularly a vibration sensor (19), arranged in the housing, wherein, The electronic computing storage unit (18) is configured to store and process sensor data of sensors arranged in the housing.

3. The unit according to any one of the preceding claims, the unit further having a flange connection (15) for connecting the housing to the motor (2), in particular the motor base (6) of the motor (2).

4. The unit according to any one of the preceding claims, wherein, The shell is designed as a hollow cylindrical shell, especially a hollow cylindrical shell made of metal, especially stainless steel.

5. The unit according to claim 4, wherein, The input interfaces (16, 17) are encapsulated in potting material in the bottom region of the hollow cylindrical shell, and the output interface (20) is encapsulated in potting material in the top region of the hollow cylindrical shell.

6. The unit according to any one of the preceding claims, wherein, The output interface (20) is designed as a bidirectional interface, especially an interface that conforms to the IO-Link standard.

7. The unit according to any one of the preceding claims, wherein, At least one digital input interface (17) is designed to be an RS485 compliant interface.

8. The unit according to any one of the preceding claims, wherein, The electronic computing storage unit (18) is configured to store and / or process static data and / or operating data of the motor (2).

9. The unit according to any one of the preceding claims, wherein, The electronic computing storage unit (18) is configured to compare the stored and / or processed data with a limit, and output an alarm message when one of the limits is reached.

10. An electric motor (2) for a machine (1), the electric motor having: - Motor shaft (3); - The motor base (6) and the motor shaft (3) are rotatably supported in the motor base; - At least one sensor (9, 10, 11, 12, 13) for detecting sensor parameters of the motor (2); and - The data acquisition and processing unit (14) according to any one of the preceding claims, wherein, One of the input interfaces (16, 17) is connected to the sensor (9, 10, 11, 12, 13).

11. The motor according to claim 10, wherein the motor has at least one temperature sensor (9, 10, 11, 12) for detecting the bearing temperature, stator temperature and / or coolant temperature of the motor (2).

12. The motor according to claim 10 or 11, wherein the motor has a speed sensor (13), One of the input interfaces (16, 17) of the data acquisition and processing unit (14) is connected to the speed sensor (13).

13. The motor according to any one of claims 10 to 12, the motor further comprising a sensor for detecting axial displacement of the motor shaft (3) relative to the motor base (6), wherein, One of the input interfaces (16, 17) of the data acquisition and processing unit (14) is connected to a sensor for detecting the axial displacement of the motor shaft (3).

14. A machine (1), said machine having: - The motor (2) according to any one of claims 10 to 13; - Machine controller (21); and - A bidirectional communication link (22) between the machine controller (21) and the data interface (20) of the data acquisition and processing unit (14), especially a communication link conforming to the IO-Link standard.

15. The machine according to claim 14, wherein, The data acquisition and processing unit (14) is configured to receive data from the machine controller (21) via a bidirectional communication link (22), and the electronic computing and storage unit (18) is configured to store and process data provided through the input interfaces (16, 17) and / or sensor data of sensors arranged in the housing based on the data received via the bidirectional communication link (22).

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