# US 9,882,444 B2 · Rotating electrical machine having a structure for support of a bus bar and terminal block

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- Number: US 9,882,444 B2
- Document ID: US9882444B2
- Status: Granted
- Kind: B2
- Application number: 14/649,978
- Filed: 2013-04-19
- Published: 2015-11-26
- Granted: 2018-01-30
- Earliest claimed: 2013-04-19
- Assignees: Mitsubishi Electric Corporation
- Applicants: Mitsubishi Electric Corporation
- Inventors: Tadashi Murakami; Kouichi Ojima; Masaya Inoue
- Web page: https://patentgrep.com/patent/US9882444B2

## CPC

- H02K 3/28: Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32)
- H02K 3/522: {for generally annular cores with salient poles}
- H02K 5/225: {Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132)}
- H02K 11/0094: {Structural association with other electrical or electronic devices}
- H02K 2203/09: Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A terminal block is fixed to a frame holding a stator and in phase with the stator whereas a part of an outside wire is fixed to a case. Hence, a bus bar extracted from a connection plate is welded to the terminal block hardly under the influence of a tolerance caused by integration of components and a tolerance of assembly. Even when a load applied from the outside gives rise to a phase difference between the case and the frame, a tolerance can be absorbed by the outside wire. Accordingly, a load applied to a weld portion of the terminal block and the bus bar can be reduced.

## Claims

### Claim 1

A rotating electrical machine, comprising:
a rotor provided on a peripheral surface of a rotary driving shaft;
a stator oppositely spaced apart from an outer peripheral surface of the rotor and held inside a circular-cylindrical frame;
a connection plate having a bus bar connected to one end of a coil wound around the stator and an insulating holder, the bus bar including a plurality of bus bars laminated in a radial direction and the insulating holder holding a plurality of the bus bars;
a terminal block having a connection terminal to which is welded the bus bar extracted from the connection plate to electrically connect an outside wire that supplies the coil with power and the bus bar; and
a case storing the frame and the terminal block; and
an annular connection plate cover made of an insulating material and covering the connection plate,
the rotating electrical machine being characterized in that:
a part of the outside wire is fixed to the case and the terminal block is directly or indirectly fixed to the frame,
the connection plate cover is fixed to the frame, and
the terminal block together with the connection plate and the connection plate cover is sandwiched between the stator and the frame.

### Claim 2 (depends on 1)

The rotating electrical machine according to claim 1, characterized in that:
the terminal block is fixed to the connection plate cover.

### Claim 3 (depends on 1)

The rotating electrical machine according to claim 1, characterized in that:
the terminal block is integrally molded with the connection plate cover.

### Claim 4

A rotating electrical machine, comprising:
a rotor provided on a peripheral surface of a rotary driving shaft;
a stator oppositely spaced apart from an outer peripheral surface of the rotor and held inside a circular-cylindrical frame;
a connection plate having a bus bar connected to one end of a coil wound around the stator and an insulating holder, the bus bar including a plurality of bus bars laminated in a radial direction and the insulating holder holding a plurality of the bus bars;
a terminal block having a connection terminal to which is welded the bus bar extracted from the connection plate to electrically connect an outside wire that supplies the coil with power and the bus bar;
a case storing the frame and the terminal block; and
an annular connection plate cover made of an insulating material and covering the connection plate,
the rotating electrical machine being characterized in that:
a part of the outside wire is fixed to the case and the terminal block is directly or indirectly fixed to the frame, and
the terminal block together with the connection plate and the connection plate cover is fixed to the frame by an annular pressing member press-fit inside the frame.

### Claim 5

A rotating electrical machine, comprising:
a rotor provided on a peripheral surface of a rotary driving shaft;
a stator oppositely spaced apart from an outer peripheral surface of the rotor and held inside a circular-cylindrical frame;
a connection plate having a bus bar connected to one end of a coil wound around the stator and an insulating holder, the bus bar including a plurality of bus bars laminated in a radial direction and the insulating holder holding a plurality of the bus bars;
a terminal block having a connection terminal to which is welded the bus bar extracted from the connection plate to electrically connect an outside wire that supplies the coil with power and the bus bar; and
a case storing the frame and the terminal block,
the rotating electrical machine being characterized in that:
a part of the outside wire is fixed to the case and the terminal block is directly or indirectly fixed to the frame, and
the terminal block together with the connection plate is sandwiched between the stator and the frame.