Unit for data capture and processing for an electric motor of a machine, electric motor and machine with same

Abstract

The invention relates to a unit for data capture and processing (14) for an electric motor (2) of a machine (1), and to an electric motor (2) and a machine (1). The unit for data capture and processing (14) comprises: at least one analogue input interface (16) for connection to sensors (9, 10, 11, 13) integrated in the electric motor (2); at least one digital input interface (17) for connection to sensors (12) or functional units integrated in the electric motor (2); an electronic computing and storage unit (18) for storing and processing the data provided via 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 and storage unit (18) and the output interface (20) are accommodated.

Description

[0001] Data acquisition and processing unit for an electric motor of a machine, electric motor and machine hereby

[0002] DESCRIPTION

[0003] The invention relates to a unit for data acquisition and processing for an electric motor of a machine, an electric motor and a machine.

[0004] Electric motors are widely used sub-units of machines or

[0005] Systems (e.g. machine tools, packaging machines, air compressors, printing machines, conveyor systems, food production systems, centrifuges, etc.). Typically, the machines themselves have a machine control system that can also communicate with the electric motors installed in the machine. State of the art electric motors for machines are known which are connected to the machine control system of the machine via cables to control the electric motor itself and to record sensor data from the electric motor (e.g. temperature of a motor bearing, motor temperature, speed). However, with an increasing number of sensors in the electric motor, this leads to increased space requirements and complex cable routing. In addition, the amount of data to be transmitted increases, so the workload of the machine control system also increases.

[0006] The invention is based on the object of creating a particularly advantageous connection possibility for transmitting data between an electric motor and a machine control system of a machine.

[0007] This object is achieved by a unit for data acquisition and processing having the features of claim 1. Advantageous embodiments are described in the dependent claims dependent on claim 1. The unit for data acquisition and processing according to the invention for an electric motor of a machine has at least one analog input interface for connection to sensors integrated in the electric motor, at least one digital input interface for connection to sensors or functional units integrated in the electric motor (e.g.a release unit for releasing a tool clamped in an electric drive motor of a machine tool), an electronic computing and storage unit for storing and processing the data made available via the input interfaces, an output interface for outputting the stored and / or processed data and a housing in which the input interfaces, the electronic computing and storage unit and the output interface are accommodated.

[0008] Such a data acquisition and processing unit provides a particularly advantageous connection option for transmitting data between a machine's electric motor and the machine's control system. The data generated by the sensors and / or functional units of the electric motor are centrally consolidated in this unit and forwarded in a bundled form – namely via the output interface – to the machine's control system. This simplifies or reduces the number of interfaces required between the electric motor and the machine control system. The required cable connections are correspondingly reduced, and the space required is also reduced. Furthermore, the received data can be stored and / or further processed in the electronic computing and storage unit. This reduces the amount of data that must be transmitted to the machine control system.By accommodating the input interfaces, the electronic computing and storage unit and the output interface in one housing, the above-mentioned elements are protected from mechanical impact.

[0009] In a preferred embodiment, the housing is designed as a hollow cylindrical housing. This further reduces the required space.

[0010] In a further advantageous embodiment, a further sensor, in particular a vibration sensor with three measuring axes, is arranged in the housing, the sensor data of which is also stored and / or processed by the electronic computing and storage unit. If the further sensor is designed as a vibration sensor, vibrations of the electric motor during operation can be recorded and / or monitored, and vibrations of the electric motor in a disassembled state (e.g., during transport of the electric motor) can also be detected. It is also possible to detect vibrations or shocks of the data acquisition and processing unit itself.

[0011] Advantageously, the housing is connected to the electric motor via a flange connection. This allows for a particularly stable connection. If the data acquisition and processing unit is equipped with a vibration sensor, the flange connection is particularly advantageous, as it ensures that vibrations generated in the electric motor are reliably transmitted to the data acquisition and processing unit, where they can be detected by the vibration sensor.

[0012] Furthermore, the input interfaces can be embedded in a potting compound near the base of the hollow cylindrical housing, and the output interface near the base of the hollow cylindrical housing. If the data acquisition and processing unit is equipped with a sensor, this is also advantageously embedded in a potting compound. This embedding ensures particularly stable positioning of the elements. It also ensures that the sensor of the data acquisition and processing unit can operate reliably. If this sensor is designed as a vibration sensor, for example, embedding it in the potting compound allows vibrations to be reliably transmitted to the vibration sensor, resulting in particularly precise measurement results.

[0013] In an advantageous embodiment, the housing is made of metal, particularly stainless steel. This provides particularly robust and durable protection against mechanical influences.

[0014] The output interface can be designed as a bidirectional interface, particularly one compliant with the IO-Link standard. This allows not only data transmission from the electric motor to the machine controller, but also data transmission from the machine controller to the electric motor. This further increases the functionality of the unit for data acquisition and processing and reduces the need for additional interfaces between the drive motor and the machine controller.

[0015] In an advantageous embodiment, the data acquisition and processing unit is configured to receive data from the machine control system via the bidirectional communication connection, and the electronic computing and storage unit is configured to store and process the data provided via the input interfaces and / or the sensor data from the sensor arranged in the housing depending on the data received via the bidirectional communication connection. In other words, the data acquisition and processing unit has a feedback function such that, depending on the type of machine to which the unit is connected via the bidirectional communication connection, the manner in which the data provided via the input interfaces and / or the sensor data from the sensor arranged in the housing are stored or processed is adapted.

[0016] In a further advantageous embodiment, the electronic computing and storage unit is configured to, on the one hand, store and / or process static data and / or operating data of the electric motor and, on the other hand, to compare the stored and / or processed data with limit values ​​and, if one of the limit values ​​is reached, to issue a warning message. In this way, the data acquisition and processing unit can be used flexibly and, if necessary, forward the acquired / processed data.

[0017] In a further advantageous embodiment, the data acquisition and processing unit further comprises an updating unit which is designed to modify the static data and / or operating data of the drive motor stored in the electronic computing and storage unit.

[0018] Furthermore, it is an object of the present invention to provide an electric motor for a machine and a machine with a particularly advantageous connection option for transmitting data between the electric motor and a machine control system of the machine.

[0019] The electric motor according to the invention for a machine comprises a motor shaft, a motor base body in which the motor shaft is rotatably mounted, at least one sensor for detecting a sensor variable (e.g.

[0020] temperature, speed) of the electric motor and the unit for data acquisition and processing, whereby one of the input interfaces is connected to the sensor for detecting the sensor variable of the electric motor.

[0021] Advantageously, the motor spindle also has a plurality of additional sensors and / or functional units, in particular temperature sensors for determining the temperatures of one or more motor bearings, a stator temperature, a rotor temperature, or a coolant temperature of the electric motor, as well as sensors / functional units for determining a position, for determining an axial displacement of motor components, for monitoring a planar contact, for monitoring and releasing a tool connected to the electric motor, for determining a speed and / or angle of rotation of the motor shaft, and for determining and monitoring a hydraulic pressure. These sensors and / or functional units are connected to the data acquisition and processing unit, so that the data provided by them via the input interfaces can be stored and / or processed by its electronic computing and storage unit.

[0022] The machine according to the invention comprises the electric motor, the data acquisition and processing unit, and a machine controller. A bidirectional communication link, in particular a communication link according to the IO-Link standard, connects the machine controller and the output interface of the data acquisition and processing unit.

[0023] The invention is further explained using an exemplary embodiment in the drawing figures. Figure 1 shows a schematic view of a machine with a machine control system and an electric motor to which a unit for data acquisition and processing is flanged;

[0024] Fig. 2 is a schematic side view of the data acquisition and processing unit of Fig. 1; and

[0025] Fig. 3 is a schematic block diagram of the data acquisition and processing unit shown in Fig. 1 and its interaction with other units of the electric motor and the machine control system of the machine.

[0026] Fig. 1 shows a schematic diagram of a machine 1. The machine 1 has an electric motor 2. This electric motor 2 can be, for example, a drive motor or a servo motor. The electric motor 2 has a motor shaft 3, which can be provided on the front, for example, with a gear or a holder for a tool (e.g. a drilling or milling tool). The motor shaft 3 is rotatably mounted in a motor base body 6 via bearings 4 and 5. Furthermore, the electric motor 2 has a rotor 7 arranged on the motor shaft 3 and a stator 8 arranged in the motor base body 6 for driving the motor shaft 3.

[0027] The motor spindle 1 is further equipped with a first temperature sensor 9 for detecting the temperature of the bearing 4, a second temperature sensor 10 for detecting the temperature of the bearing 5, a third temperature sensor 11 for detecting the temperature of the stator 8, and a fourth temperature sensor 12 for detecting the temperature of the coolant flowing through the electric motor 2. A speed sensor 13 is used to detect the speed and / or the angle of rotation of the motor shaft 3. The temperature sensors 9, 10, 11, 12 and the speed sensor 13 are examples of sensors for detecting a sensor variable of the electric motor 2. A unit for data acquisition and processing 14 is flange-mounted on the motor base body 6 via a flange connection 15. The temperature sensors 9 to 12 and the speed sensor 13 are connected to the motor base body 6 via signal lines (in Fig.1 shown in dashed lines) is connected to the data acquisition and processing unit 14 so that data communication can take place between these elements.

[0028] Fig. 2 and Fig. 3 describe the data acquisition and processing unit 14 in more detail. The data acquisition and processing unit 14 has a plurality of analog input interfaces 16 and digital input interfaces 17. In the present embodiment, the digital input interfaces 17 are designed as interfaces according to the RS485 standard. The temperature sensors 9 to 12 and the speed sensor 13 are connected to the data acquisition and processing unit 14 via these input interfaces 16 and 17.

[0029] The data acquisition and processing unit 14 also includes an electronic computing and storage unit 18 for storing and processing the data provided via the 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.

[0030] The vibration sensor 19 is connected to the computing and storage unit 18 so that its sensor data can be stored and / or processed by the computing and storage unit 18.

[0031] The output interface 20 is designed as a bidirectional digital interface and serves to output the data stored and / or processed by the computing and storage unit 18 via a bidirectional communication connection 22 to a machine controller 21 of the machine 1 and to receive data sent from the machine controller 21 to the data acquisition and processing unit 14. In the present embodiment, the output interface 20 is designed as an interface according to the IO-Link standard.

[0032] The above-described elements of the data acquisition and processing unit 14 are housed in a hollow-cylindrical stainless steel housing. The input interfaces 16 and 17 are embedded in a potting compound near the base of the housing. The output interface 20 is embedded in a potting compound near the top surface of the housing—that is, an area opposite the input interfaces 16 and 17. The vibration sensor 19 and the computing and storage unit 18 are also embedded in a potting compound.

[0033] The data generated by the sensors - in the exemplary embodiment, reference numerals 9, 10, 11, 12, 13 - and / or the functional units of the electric motor 2 are fed to the data acquisition and processing unit 14 via the input interfaces 16, 17. There, these data - as well as the data from the vibration sensor 19 - are stored and further processed by the computing and storage unit 18. In particular, the computing and storage unit 18 stores both static data (e.g., identification numbers, information about the installation location or operator) of the electric motor 2 and / or the data acquisition and processing unit 14, as well as operating data (e.g., status, temperature, speed, tension state, operating hours) of the electric motor 2 and / or the data acquisition and processing unit 14. These data are also further processed by the computing and storage unit 18, if necessary, also compressed using suitable methods and / or converted into a displayable form (e.g.,histograms).

[0034] Limit or warning values ​​for certain parameters (e.g. temperature limit values, vibration limit values, speed limit values) can also be stored in the computing and storage unit 18 and the computing and storage unit 18 can be programmed in such a way that it compares the stored and / or processed data with the limit or warning values ​​and, if one of the limit or warning values ​​is reached, issues a warning message.

[0035] Finally, the stored and / or processed data are output via the output interface 20 and the communication connection 22 to the machine control 21 of the machine 1.

[0036] The data acquisition and processing unit 14 further comprises a further interface 23 for transmitting the stored and / or processed data outside the machine control 21. In this way, the data of the motor spindle 1 can be transmitted directly, bypassing the machine control 21.

[0037] In the present exemplary embodiment, the sensors 9, 10, 11 and 13 of the motor spindle 1 are connected to the data acquisition and processing unit 14 via analog input interfaces 16, while the sensor 12 is connected to the data acquisition and processing unit 14 via the digital input interfaces 17. However, it is also possible to connect all or some of the sensors 9, 10, 11 and 13 to the data acquisition and processing unit 14 via digital input interfaces 17. An updating unit is not explicitly shown in the figures. The updating unit is designed to modify the static data (e.g. identification numbers, information about the installation location or operator) of the electric motor 2 stored in the computing and storage unit 18 as needed, in particular to replace the data stored there with more current static data.For this purpose, the update unit can access the computing and storage unit 18 remotely via a communication network (wired or wireless).

[0038] In the present embodiment, the digital input interfaces 17 are designed as interfaces according to the RS485 standard. However, it is also possible to design some or all of the input interfaces 17 as interfaces according to a different standard.

[0039] In the present embodiment, the machine 1 has one electric motor 2. However, it is also possible for the machine 1 to have several electric motors 2, with each electric motor 2 being assigned a separate data acquisition and processing unit 14.

[0040] LIST OF REFERENCE SYMBOLS machine

[0041] 2 electric motor

[0042] 3 Motor shaft

[0043] 4, 5 camps

[0044] 6 Motor base body

[0045] 7 Rotor

[0046] 8 Stator , 10, 11 , 12 Temperature sensor

[0047] 13 Speed ​​sensor

[0048] 14 Data collection and processing unit

[0049] 15 Flange connection

[0050] 16 analog input interfaces

[0051] 17 Digital input interfaces

[0052] 18 electronic computing and storage unit

[0053] 19 Vibration sensor

[0054] 20 Output interface

[0055] 21 Machine control of the machine

[0056] 22 Communication connection

[0057] 23 Additional interface

Claims

CLAIMS 1. A data acquisition and processing unit (14) for an electric motor (2) of a machine (1), comprising: at least one analog input interface (16) for connection to sensors (9, 10, 11, 13) integrated in the electric motor (2); at least one digital input interface (17) for connection to sensors (12) or functional units integrated in the electric motor (2); an electronic computing and storage unit (18) for storing and processing the data provided via 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 and storage unit (18), and the output interface (20) are accommodated.

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

3. Unit according to one of the preceding claims, further comprising a flange connection (15) for connecting the housing to the electric motor (2), in particular to a motor base body (6) of the electric motor (2).

4. Unit according to one of the preceding claims, wherein the housing is designed as a hollow cylindrical housing, in particular as a hollow cylindrical housing made of metal, in particular of stainless steel.

5. Unit according to claim 4, wherein the input interfaces (16, 17) are embedded in a potting compound in the region of a base surface of the hollow cylindrical housing and the output interface (20) is embedded in a potting compound in the region of a cover surface of the hollow cylindrical housing.

6. Unit according to one of the preceding claims, wherein the output interface (20) is designed as a bidirectional interface, in particular as an interface according to the IO-Link standard.

7. Unit according to one of the preceding claims, wherein at least one digital input interface (17) is designed as an interface according to the RS485 standard.

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

9. Unit according to one of the preceding claims, wherein the electronic computing and storage unit (18) is configured to compare the stored and / or processed data with limit values and, if one of the limit values is reached, to issue a warning message.

10. Electric motor (2) for a machine (1), comprising: a motor shaft (3); a motor base body (6) in which the motor shaft (3) is rotatably mounted; at least one sensor (9, 10, 11, 12, 13) for detecting a sensor variable of the electric motor (2); and a data acquisition and processing unit (14) according to one of the preceding claims, wherein one of the input interfaces (16, 17) is connected to the sensor (9, 10, 11, 12, 13).

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

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

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

14. Machine (1), comprising: an electric motor (2) according to one of claims 10 to 13; a machine control (21); and a bidirectional communication connection (22), in particular as a communication connection according to the IO-Link standard, between the machine control (21) and the output interface (20) of the data acquisition and processing unit (14).

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

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