# US 10,312,762 B2 · Coil, rotating electrical machine equipped with same, and method for manufacturing same

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- Number: US 10,312,762 B2
- Document ID: US10312762B2
- Status: Granted
- Kind: B2
- Application number: 14/776,291
- Filed: 2013-12-13
- Published: 2016-02-04
- Granted: 2019-06-04
- Earliest claimed: 2013-03-15
- Assignees: Hitachi Automotive Systems, Ltd.
- Applicants: Hitachi Automotive Systems, Ltd.
- Inventors: Kenichi Nakayama; Tomohiro Fukuda; Akira Toba; Shinji Yamazaki; Takashi Genmoto; Naoki Nishikawa; Hisaya Shimizu
- Web page: https://patentgrep.com/patent/US10312762B2

## CPC

- H02K 3/30: Windings characterised by the insulating material
- H02K 3/38: around winding heads, equalising connectors, or connections thereto
- H02K 15/12: Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
- H02K 15/30: Manufacture of winding connections
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

Provided are a coil having excellent insulation properties, a rotating electrical machine equipped with the same, and a method for manufacturing the same. The coil (60) has a covered portion where a conductive body (602) is covered with an insulating film (612) and a stripped portion where the insulating film is stripped off, and the stripped portion is electrophoretically coated with a resin material (601). The coil (60) may have a configuration wherein segment conductors (28) each having a covered portion and stripped portion are included, connection parts are formed by the stripped portions of two different segment conductors (28) being connected at coil ends (62), and the thickness of the resin material (601) is no more than the thickness of the insulating film (612) at the boundary portion (630) between the covered portion and the stripped portion.

## Claims

### Claim 1

A coil comprising:
a covered portion comprising a conductive body and an insulating film covering the conductive body; and
a stripped portion at which the insulating film has been stripped off, wherein
the insulating film is constituted by three layers,
the stripped portion is provided with coating of a resin material, and
a boundary portion between the insulating film and the resin material has a same thickness as a combined thickness of the first and second layer in the insulating film.

### Claim 2 (depends on 1)

The coil according to any one of claim 1, wherein the resin material has an average thickness of 5 to 50 micrometers.

### Claim 3 (depends on 1)

A rotating electrical machine comprising the coil according to claim 1.

### Claim 4

A method for manufacturing a coil comprising:
providing a covered portion comprising a conductive body and an insulating film covering the conductive body;
providing a stripped portion at which the insulating film has been stripped off;
supplying electricity to the conductive body using an electrode in an electrodeposition bath as a positive electrode and using the conductor as a negative electrode for adhering to a resin material to the stripped portion, wherein
the insulating film is constituted by three layers,
the stripped portion is provided with coating of a resin material, and
a boundary portion between the insulating film and the resin material has a same thickness as a combined thickness of the first and second layer in the insulating film.

### Claim 5 (depends on 4)

The method for manufacturing a coil according to claim 4, comprising
providing segment conductors each having the covered portion and the stripped portion,
connecting two different segment conductors, out of the segment conductors, to each other, at their stripped portions, in a coil end, to form a connection part, and
supplying electricity to the conductive body, such that the resin material has a thickness equal to or less than a thickness of the insulating film, at a boundary portion between the covered portion and the stripped portion, in the electrodeposition process.

### Claim 6 (depends on 5)

The method for manufacturing a coil according to claim 5, wherein
in the electrodeposition process, only the connection part and a periphery thereof are inserted in the electrodeposition bath.