# US 2021/0344247 A1 · Stator of rotating electrical machine for vehicle

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- Number: US 2021/0344247 A1
- Document ID: US20210344247A1
- Status: Published application
- Kind: A1
- Application number: 17/190,645
- Filed: 2021-03-03
- Published: 2021-11-04
- Earliest claimed: 2020-04-30
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Yukio TSUCHIYA; Akihide TAKEHARA
- Web page: https://patentgrep.com/patent/US20210344247A1

## CPC

- H02K 11/25: Devices for sensing temperature, or actuated thereby
- H02K 3/50: Fastening of winding heads, equalising connectors, or connections thereto
- H02K 3/52: Fastening salient pole windings or connections thereto
- H02K 5/225: {Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132)}
- H02K 2203/09: Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
- Y02T 10/64: Electric machine technologies in electromobility
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A first U-shaped part that is bent so as to form a pair of opposite surfaces facing each other, and a second U-shaped part that is bent so as to form a pair of opposite surfaces facing each other are provided side by side in a bus bar main body of a neutral conductor bus bar. One of the first pair of opposite surfaces and one of the second pair of opposite surfaces are located in the same plane, and the other of the first pair of opposite surfaces and the other of the second pair of opposite surfaces are located in the same plane. A temperature sensor is retained by being inserted through a gap between the first pair of opposite surfaces and a gap between the second pair of opposite surfaces.

## Claims

### Claim 1

A stator of a rotating electrical machine for a vehicle, the stator comprising:
a coil wound around a stator core having a cylindrical shape centered on an axis;
a bus bar connected to the coil; and
a temperature sensor that measures a temperature in the bus bar, wherein:
the bus bar has a bus bar main body that is extended into an elongated shape, and a connection terminal that connects the bus bar main body and the coil to each other;
a first bent part that is bent so as to form a pair of first opposite surfaces facing each other, and a second bent part that is bent so as to form a pair of second opposite surfaces facing each other are provided side by side in the bus bar main body;
one of the pair of first opposite surfaces and one of the pair of second opposite surfaces are located in the same plane, and the other of the pair of first opposite surfaces and the other of the pair of second opposite surfaces are located in the same plane; and
the temperature sensor is retained by being inserted through a gap between the pair of first opposite surfaces and a gap between the pair of second opposite surfaces.

### Claim 2 (depends on 1)

The stator of a rotating electrical machine for a vehicle according to claim 1, wherein:
the bus bar main body is extended into an elongated shape in a circumferential direction of the stator core; and
the first bent part and the second bent part are extended toward an outer circumferential side in a radial direction of the stator core and then bent toward an inner circumferential side in the radial direction.

### Claim 3 (depends on 2)

The stator of a rotating electrical machine for a vehicle according to claim 2, wherein the first bent part and the second bent part are each bent into a U-shape in a plane including the axis.

### Claim 4 (depends on 2)

The stator of a rotating electrical machine for a vehicle according to claim 2, wherein:
a thickness direction of the bus bar main body is a direction parallel to the axis; and
the connection terminal has a structure of being extended from the bus bar main body toward the inner circumferential side in the radial direction and then bent in a direction parallel to the axis.

### Claim 5 (depends on 1)

The stator of a rotating electrical machine for a vehicle according to claim 1, wherein:
a coupling part that is bent into a U-shape and couples the first bent part and the second bent part to each other is formed between the first bent part and the second bent part;
the coupling part has a connection surface that is located in the same plane as those of the pair of first opposite surfaces and the pair of second opposite surfaces that are located on a side of the coupling part; and
the temperature sensor is in contact with the connection surface.

### Claim 6 (depends on 5)

The stator of a rotating electrical machine for a vehicle according to claim 5, wherein an area of a cross-section of each of the first bent part, the second bent part, and the coupling part cut along a width direction is equal to an area of a cross-section of the bus bar main body cut along a width direction.

### Claim 7 (depends on 1)

The stator of a rotating electrical machine for a vehicle according to claim 1, wherein:
the coil is one of Y-connected three-phase coils; and
the bus bar main body is a neutral conductor of the coil.