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CN-115104252-B - Assembly of an electric motor with an encoder

CN115104252BCN 115104252 BCN115104252 BCN 115104252BCN-115104252-B

Abstract

In order to reduce the cabling effort of an electric motor having an encoder, the electric motor (10) has an encoder interface (11) which can be connected to the adjusting unit (3) in order to receive an adjustment signal (u) from the adjusting unit (3), the encoder interface being designed to receive an encoder signal (s 2) from the encoder (2). Furthermore, the electric motor (10) has a signal interface (12) which is designed to transmit the encoder signal (s 2) to the regulating unit (3).

Inventors

  • E. Bo Hatchie

Assignees

  • B和R工业自动化有限公司

Dates

Publication Date
20260512
Application Date
20210219
Priority Date
20200221

Claims (11)

  1. 1. An electric motor (10) which can be connected to a regulating unit (3) in order to receive a regulating signal (u) from the regulating unit (3), wherein the electric motor (10) has a signal interface (12) which is designed to transmit an encoder signal (s 1) of an encoder (1) integrated on the electric motor (10) to the regulating unit (3), characterized in that the electric motor (10) has an encoder interface (11) which is designed to receive an encoder signal (s 2) from an encoder (2) which is arranged remotely from the electric motor (10) and in that the signal interface is designed to transmit an encoder signal (s 2) of an encoder (2) which is arranged remotely from the electric motor (10) to the regulating unit (3).
  2. 2. The electric motor (10) according to claim 1, characterized in that the signal interface (12) is designed for forwarding an encoder signal (s 2) of an encoder (2) arranged remote from the electric motor (10) itself to the regulating unit (3).
  3. 3. The electric motor (10) according to claim 1, characterized in that the signal interface (12) is designed for unchanged forwarding of an encoder signal (s 1) of an encoder (1) integrated on the electric motor (10) to the regulating unit (3).
  4. 4. The electric motor (10) according to claim 2, characterized in that the signal interface (12) is designed for unchanged forwarding of an encoder signal (s 1) of an encoder (1) integrated on the electric motor (10) to the regulating unit (3).
  5. 5. The electric motor (10) according to any one of claims 1 to 4, characterized in that the signal interface (12) is designed to receive the adjustment signal (u) from the adjustment unit (3).
  6. 6. Assembly comprising a motor (10) according to any one of claims 1 to 5, an adjusting unit (3), an encoder (2) arranged remote from the motor (10), an encoder (1) integrated on the motor (10), an encoder cable (5) and a connecting cable (4), wherein the encoder interface (11) is connected via the encoder cable (5) with the encoder (2) arranged remote from the motor (10) in order to receive an encoder signal (s 2) of the encoder (2) arranged remote from the motor (10), and a signal interface (12) is connected with the adjusting unit (3) via the connecting cable (4) in order to transmit the encoder signal (s 2) of the encoder (2) arranged remote from the motor (10) and the encoder signal (s 1) of the encoder (1) integrated on the motor (10) to the adjusting unit (3).
  7. 7. The assembly according to claim 6, characterized in that the signal interface (12) receives the adjustment signal (u) via the connection cable (4).
  8. 8. Method for operating an electric motor (10), wherein an encoder signal (s 1) of an encoder (1) integrated on the electric motor (10) is transmitted to a regulating unit (3) via a connection cable (4), characterized in that an encoder signal (s 2) of an encoder (2) arranged remote from the electric motor (10) is transmitted to the electric motor (10) and from the electric motor (10) to the regulating unit (3) via the connection cable (4), and the regulating unit (3) determines a regulating signal (u) and transmits the regulating signal to the electric motor (10) using the encoder signal (s 2) of the encoder (2) arranged remote from the electric motor (10) and/or the encoder signal (s 1) of the encoder (1) integrated on the electric motor (10).
  9. 9. Method according to claim 8, characterized in that the motor (10) forwards an encoder signal (s 2) of an encoder (2) arranged remote from the motor (10) unchanged to the regulating unit (3).
  10. 10. Method according to claim 9, characterized in that the encoder signal (s 2) of the encoder (2) arranged remote from the motor (10) and the encoder signal (s 1) of the encoder (1) integrated on the motor (10) are transmitted to the regulating unit (3) via the adjusting signal line (l 12) of the connecting cable (4).
  11. 11. Method according to any one of claims 8 to 10, characterized in that the adjustment signal (u) is transmitted from the adjusting unit (3) to the motor (10) via the connection cable (4).

Description

Assembly of an electric motor with an encoder Technical Field The invention relates to an electric motor which can be connected to an adjusting unit in order to receive an adjustment signal from the adjusting unit. Furthermore, the invention relates to an assembly comprising a motor, an adjusting unit, an encoder cable and a connecting cable according to the invention. The invention further relates to a method for operating an electric motor, wherein an encoder signal of an encoder is transmitted to a regulating unit, which determines an adjustment signal using the encoder signal and transmits the adjustment signal to the electric motor. Background Motors, in particular servo motors, are often used in industrial equipment, in particular in machine tools, packaging machines, industrial robots, etc. The control variable of the electric motor is controlled by the control unit by means of a predetermined value of the control signal. In order to be able to achieve the adjustment, at least one encoder is required, which provides an encoder signal, which is fed back to the adjustment unit. Multiple encoders, such as a master encoder and one or more slave encoders, may also be provided. The master encoder is typically integrated on the motor (master device), while the slave encoder is arranged on the slave device and thus remote from the motor. A (slave) encoder is therefore arranged on the slave (e.g. a roller connected to the motor), wherein a cable extending from the slave to the adjustment unit passes the encoder signal directly to the adjustment unit. Instead of such a master-slave combination, a single encoder can also be provided, for example, which is arranged outside the electric motor. The control unit processes the encoder signal and calculates therefrom a control variable, which is transmitted as a control signal to the electric motor. In this case, considerable cabling effort is incurred, and in particular, the addition, removal or replacement of the encoder is particularly complicated by the long cable connection between the encoder and the adjusting unit. Disclosure of Invention The object of the invention is therefore to reduce the cabling effort of an electric motor with an encoder. According to the invention, the object is achieved in that the electric motor has an encoder interface which is designed to receive an encoder signal from the encoder, wherein the electric motor has a signal interface which is designed to transmit the encoder signal to the regulating unit. In an assembly comprising a motor, a regulating unit, an encoder cable and a connecting cable according to the invention, the encoder interface may be connected with the encoder via the encoder cable for receiving an encoder signal from the encoder, and the signal interface of the motor is connected with the regulating unit via the connecting cable for transmitting the encoder signal to the regulating unit. The object is furthermore achieved by a method in that an encoder signal is transmitted from the encoder to the motor and an encoder signal is transmitted from the motor to the regulating unit. Thus, according to the invention, the encoder is not directly connected to the adjusting unit via a cable, but preferably to the motor via an encoder cable. As the motor, in particular, a servomotor may be provided. Furthermore, the encoder signal is transmitted by the motor to the regulating unit. The control unit processes the encoder signal and determines therefrom a control variable, which is in turn transmitted to the electric motor. Because the encoder is connected to the motor rather than directly to the adjustment unit, a simpler cabling is ensured, especially when the encoder is located close to the motor and further away from the adjustment unit. By connecting the encoder to the encoder interface of the motor, a modular, simpler connection of the adjusting unit, the motor and the encoder is obtained, wherein the motor forms the center. The encoder can be easily replaced, removed or added. Preferably, the signal interface is designed to relay the encoder signal itself to the regulating unit. This means that the encoder signal is circulated by the motor (durchgeschliffen) and forwarded unchanged to the regulating unit. Alternatively, the encoder signal can also be processed (for example modulated onto a suitable carrier wave) and transmitted to the control unit in this way. The motor may be designed to transmit a further encoder signal of a further encoder to the regulating unit. Thus, in addition to the encoder signal, the further encoder signal can also be transmitted by the motor to the regulating unit. The control unit processes the encoder signal and the further encoder signal and determines therefrom a control variable, which is in turn transmitted to the electric motor. In particular, the encoder may be provided as a slave encoder and the further encoder may be provided as a master encoder. The further encoder may be integrate