# US 2018/0026496 A1 · Motor having function of generating and feeding electric power at coil end portion

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- Number: US 2018/0026496 A1
- Document ID: US20180026496A1
- Status: Published application
- Kind: A1
- Application number: 15/623,379
- Filed: 2017-06-15
- Published: 2018-01-25
- Earliest claimed: 2016-07-19
- Assignees: Fanuc Corporation
- Applicants: Fanuc Corporation
- Inventors: Chao ZHI
- Web page: https://patentgrep.com/patent/US20180026496A1

## CPC

- H02K 11/0094: {Structural association with other electrical or electronic devices}
- H02K 5/16: Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields (magnetic bearings H02K7/09)
- H02K 11/20: for measuring, monitoring, testing, protecting or switching (rectifiers H02K11/04; power electronics H02K11/33)
- H02K 11/25: Devices for sensing temperature, or actuated thereby
- H02K 11/27: Devices for sensing current, or actuated thereby (overcurrent protection responsive to temperature of the machines or parts thereof, e.g. windings, H02K11/25)
- H02K 11/33: Drive circuits, e.g. power electronics (H02K11/38 takes precedence)
- H02K 11/35: Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A motor according to an embodiment of the present invention has a stator including windings wound therein, and a rotor disposed inside the stator. The motor includes an electric circuit unit, and an induction generator coil disposed in the vicinity of a coil end of the winding so as to generate electric power by a change of magnetic flux generated by the winding. The electric circuit unit is driven by the electric power generated and fed by the induction generator coil.

## Claims

### Claim 1

A motor having a stator including a winding wound therein and a rotor disposed inside the stator, the motor comprising:
an electric circuit unit; and
an induction generator coil disposed in the vicinity of a coil end of the winding so as to generate electric power by a change of magnetic flux generated by the winding,
wherein the electric circuit unit is driven by the electric power generated and fed by the induction generator coil.

### Claim 2 (depends on 1)

The motor according to claim 1, wherein the electric circuit unit is a sensor for measuring at least one of a current flowing through the winding, the temperature or vibration of the stator, the temperature or vibration of the rotor, the humidity inside the motor, the temperature or vibration of a bearing for supporting the rotor, and the magnetic flux intensity inside the motor.

### Claim 3 (depends on 1)

The motor according to claim 1, wherein the electric circuit unit drives at least one of an actuator to remove foreign matter from the inside of the motor, an actuator to grease a bearing for supporting the rotor, and a mechanism to apply a brake torque to the rotor.

### Claim 4 (depends on 1)

The motor according to claim 1, wherein the electric circuit unit has a wireless transceiver function.