CONDITION MONITORING SYSTEM FOR A MOTOR

• US 20120267988A1
• Filed: 12/10/2009
• Published: 10/25/2012
• Est. Priority Date: 12/10/2009
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Hassel, Jörg
• Granted Patent: US 9,276,448 B2
• Time in Patent Office: Days
• US Class Current: 310/68.B
• CPC Class Codes: G01D 11/24 Housings ; Casings for instruments
• CPC Class Codes: H02K 11/35 Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

In order to enable simple, low-cost monitoring of a motor, a switch box cover for the motor, a condition monitoring system has a sensor unit for detecting a measured variable of the motor, a communication device, which is designed to provide a characteristic value that characterizes the measured variable to a reading device, and a supply unit for supplying the sensor unit with energy.

Claims

1-14. -14. (canceled)

15. A terminal box cover for a motor, comprising:

a sensor unit to record a measured variable of the motor;

a communications device to transmit to a reading device a parameter that characterizes the measured variable available; and

a supply unit to supply energy to the sensor unit.

16. The terminal box cover as claimed in claim 15, wherein the supply unit also supplies energy to the communications device.

17. The terminal box cover as claimed in claim 15, wherein

the motor has an electronic rating plate,

the communication device communicates with the electronic rating plate of the motor.

18. The terminal box cover as claimed in claim 15, wherein the sensor unit performs a partial discharge measurement.

19. The terminal box cover as claimed in claim 15, wherein the sensor unit measures a temperature of the motor.

20. The terminal box cover as claimed in claim 15, wherein the sensor unit measures a temperature of a stator winding of the motor, and/or an ambient temperature of the motor.

21. The terminal box cover as claimed in claim 15, wherein the sensor unit measures an out-of balance condition of the motor.

22. The terminal box cover as claimed in claim 15, wherein

the sensor unit has at least one sensor to determine the measured variable, and

the sensor unit compares the measured variable with a reference value of the motor to determine the parameter.

23. The terminal box cover as claimed in claim 22, wherein

the motor has an electronic rating plate, and

the communication device communicates with the electronic rating plate of the motor to obtain the reference value.

24. The terminal box cover as claimed in claim 15, wherein the sensor unit analyzes a plurality of measured variables with one another.

25. The terminal box cover as claimed in claim 15, wherein the sensor unit has a processor to determine the parameter.

26. The terminal box cover as claimed in claim 15, wherein

the reading device is an external, remote reading device, and

the communications device communicates with the external, remote reading device.

27. The terminal box cover as claimed in claim 15, wherein the supply unit couples energy from a motor connecting cable.

28. The terminal box cover as claimed in claim 15, wherein the supply unit obtains energy by energy harvesting.

29. A terminal box of a motor, comprising:

a terminal box base housing terminals of the motor; and

a terminal box cover to fit on the terminal box base, the terminal box cover comprising;

sensor unit to record a measured variable of the motor;

a communications device to transmit to a reading device a parameter that characterizes the measured variable available; and

supply unit to supply energy to the sensor unit.

30. A motor comprising:

a motor drive having terminals; and

a terminal box, comprising;

a terminal box base housing terminals of the motor; and

a terminal box cover to fit on the terminal box base, the terminal box cover comprising;

sensor unit to record a measured variable of the motor;

a communications device to transmit to a reading device a parameter that characterizes the measured variable available; and

supply unit to supply energy to the sensor unit.

31. A terminal box cover for a motor, comprising:

a sensor unit to record a measured variable of the motor;

a wireless communications device to transmit a parameter that characterizes the measured variable, the parameter being transmitted to a remote reading device; and

a supply unit to supply the sensor unit with electrical energy, wherein

the supply unit converts environmental energy into electrical energy without a hardwired connection to an electric energy source.

32. The terminal box cover as claimed in claim 31, wherein

the motor is an electric motor,

the motor is externally connected via terminals within the terminal box,

the terminals are connected to a power cable,

the supply unit taps energy from the power cable in a non-intrusive manner.

33. The terminal box cover as claimed in claim 32, wherein the supply unit uses magnetic energy coupling, capacitive coupling, or resistive coupling to tap energy from the power cable.

34. The terminal box cover as claimed in claim 31, wherein the supply unit obtains electrical energy by converting energy from a heat source, a vibration source or an air flow source.