Control Device for Actuating an Electric Motor, Electric Motor and System Having a Control Device and Electric Motor

• US 20200136552A1
• Filed: 06/21/2018
• Published: 04/30/2020
• Est. Priority Date: 06/21/2017
• Status: Active Grant

• Current Assignee: Schmidhauser AG (Lenze AG /Mair/)
• Original Assignee: Schmidhauser AG (Lenze AG /Mair/)
• Inventors: BURGERMEISTER, Andreas
• Granted Patent: US 11,043,914 B2
• Time in Patent Office: Days
• CPC Class Codes: H02P 23/00 Arrangements or methods for the control of AC motors characterised by a control method other than vector control
• CPC Class Codes: H02P 23/0077 Characterised by the use of a particular software algorithm
• CPC Class Codes: H02P 29/00 Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors arrangements for starting electric motors H02P1/00; arrangements for stopping or slowing electric motors H02P3/00; control of motors that can be connected to two or more different electric power supplies H02P4/00; regulating or controlling the speed or torque of two or more electric motors H02P5/00; vector control H02P21/00
• CPC Class Codes: H02P 29/60 Controlling or determining the temperature of the motor or of the drive H02P29/02 takes precedence

Abstract

A control device for actuating an electric motor has: a temperature sensor interface for connecting an external temperature sensor, wherein the temperature sensor is provided to monitor the temperature of the electric motor, and a monitoring unit, which is configured to evaluate at least one temperature-dependent property of the temperature sensor in order to monitor the temperature of the electric motor and to exchange data with the electric motor via the temperature sensor interface independently of and in addition to the temperature monitoring.

Claims

1-15. -15. (canceled)

16. A control device for actuating an electric motor, comprising:

a temperature sensor interface for connecting an external temperature sensor, wherein the temperature sensor is provided to monitor temperature of the electric motor; and

a monitoring unit, which is configured to evaluate at least one temperature-dependent property of the temperature sensor in order to monitor the temperature of the electric motor,

wherein

the monitoring unit is further configured to exchange data with the electric motor via the temperature sensor interface independently of and in addition to the temperature monitoring.

17. The control device according to claim 16, wherein

the monitoring unit is configured to output a voltage or a current at the temperature sensor interface.

18. The control device according to claim 17, wherein

the monitoring unit is configured to evaluate an electrical resistance of the temperature sensor in order to monitor the temperature of the electric motor.

19. The control device according to claim 16, wherein

the monitoring unit is configured to evaluate an electrical resistance of the temperature sensor in order to monitor the temperature of the electric motor.

20. The control device according to claim 16, wherein

the monitoring unit is configured to output a prescribed pulse pattern at the temperature sensor interface in order to initiate a data exchange with the electric motor.

21. The control device according to claim 16, wherein

the monitoring unit is configured to evaluate a signal profile produced at the temperature sensor interface for decoding data transmitted from the electric motor to the control device.

22. The control device according to claim 16, wherein

the temperature sensor interface is a two-conductor interface.

23. The control device according to claim 16, further comprising:

a motor actuating interface for connecting phase sections of the electric motor.

24. An electric motor, comprising:

a temperature monitoring interface; and

a temperature sensor that is connected to the temperature monitoring interface,

wherein the electric motor comprises;

a control unit, which is connected to the temperature monitoring interface and which is configured to exchange data with a control device via the temperature monitoring interface.

25. The electric motor according to claim 24, wherein

the control unit is supplied with electrical operating energy via the temperature monitoring interface.

26. The electric motor according to 24, wherein

the electric motor has a switch that is actuated by the control unit, wherein the switch and the temperature sensor are looped in in series between connection poles of the temperature monitoring interface, and

the control unit is configured to close the switch in a temperature measuring mode and to open the switch in a data transmission mode.

27. The electric motor according to claim 24, wherein

the temperature sensor is a temperature-dependent resistor or a thermal contact.

28. The electric motor according to claim 24, wherein

the electric motor has a memory, a content of which is readable out and/or writable to via the temperature monitoring interface.

29. The electric motor according to claim 28, wherein

information that characterizes properties of the electric motor is stored in the memory.

30. A system, comprising:

(i) an electric motor comprising;

a temperature monitoring interface;

a temperature sensor that is connected to the temperature monitoring interface; and

a motor control unit, which is connected to the temperature monitoring interface and which is configured to exchange data via the temperature monitoring interface; and

(ii) a control device comprising;

a temperature sensor interface for connecting the temperature sensor, wherein the temperature sensor is provided to monitor temperature of the electric motor; and

a monitoring unit, which is configured to evaluate at least one temperature-dependent property of the temperature sensor in order to monitor the temperature of the electric motor, wherein the monitoring unit is further configured to exchange data with the electric motor via the temperature sensor interface independently of and in addition to the temperature monitoring.

31. The system according to claim 30, wherein

the control device is configured to read out the memory of the electric motor and to actuate the electric motor depending on the data read out.