US 2017/0250585 A1Published application

Rotary electric machine and manufacturing method thereof

AssigneeMitsubishi Electric Corporation

InventorsNaoki OHASHI, Ryuichi KITORA

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Abstract

In the rotary electric machine, bus-bar lead terminals of bus bars, which are held by a connection component, are formed in such a way that the bus-bar lead terminals are protruded from the bus bars to an axis direction of a stator, and a plurality of bus-bar storage grooves are formed by using a plurality of partitions which are concentrically arranged in a diameter direction of the stator via gaps, and in the plurality of partitions, lengths, in the axis direction, of the most outer circumference partition, which is positioned at the most outer circumference side in the diameter direction, and the most inner circumference partition, which is positioned at the most inner circumference side in the diameter direction, are longer than lengths, in the axis direction, of a plurality of middle partitions, which are positioned between the most outer circumference partition and the most inner circumference partition.

Claims14

Dependent claims

A rotary electric machine comprising:

a stator which includes stator coils for a plurality of phases at an inner circumference portion of a stator core which is formed in an annular shape;
a rotor which is inserted to central space of the stator, and includes a plurality of magnetic poles at an outer circumference portion;
and
a connection component which is mounted at least at one end portion in an axis direction of the stator, and mutually connects the stator coils for the plurality of phases, and holds bus bars which feed an electric current to the stator coils for the plurality of phases;
wherein
the connection component includes a holder made of an insulating material, which is formed in an annular shape, and is mounted at the stator in a state where one end portion in an axis direction of the connection component is faced to the one end portion in the axis direction of the stator, and includes a plurality of bus-bar storage grooves having an annular shape, which are concentrically arranged at the other end portion in the axis direction of the connection component, a plurality of bus bars having an annular shape, which are respectively installed in the plurality of bus-bar storage grooves, and are respectively corresponded to the plurality of phases, and an adhesive resin which is arranged in each of the bus-bar storage grooves, and fixes the plurality of bus bars to the holder;
and the plurality of bus bars include bus-bar lead terminals which are respectively connected to coil lead terminals of the stator coils for the plurality of phases, which are corresponded to the bus bars;
and the bus-bar lead terminals are formed in such a way that the bus-bar lead terminals are protruded from the bus bars to the axis direction of the stator;
and the plurality of bus-bar storage grooves are formed by using a plurality of partitions which are concentrically arranged in a diameter direction of the stator via gaps;
and in the plurality of partitions, lengths, in the axis direction, of the most outer circumference partition, which is positioned at the most outer circumference side in the diameter direction, and the most inner circumference partition, which is positioned at the most inner circumference side in the diameter direction, are longer than lengths, in the axis direction, of a plurality of middle partitions, which are positioned between the most outer circumference partition and the most inner circumference partition;
and the lengths, in the axis direction, of the plurality of middle partitions are practically identical.

8 more elements

A rotary electric machine comprising:

a stator which includes stator coils for a plurality of phases at an inner circumference portion of a stator core which is formed in an annular shape;
a rotor which is inserted to central space of the stator, and includes a plurality of magnetic poles at an outer circumference portion;
and
a connection component which is mounted at least at one end portion in an axis direction of the stator, and mutually connects the stator coils for the plurality of phases, and holds bus bars which feed an electric current to the stator coils for the plurality of phases;
wherein
the connection component includes a holder made of an insulating material, which is formed in an annular shape, and is mounted at the stator in a state where one end portion in an axis direction of the connection component is faced to the one end portion in the axis direction of the stator, and includes a plurality of bus-bar storage grooves having an annular shape, which are concentrically arranged at the other end portion in the axis direction of the connection component, a plurality of bus bars having an annular shape, which are respectively installed in the plurality of bus-bar storage grooves, and are respectively corresponded to the plurality of phases, and an adhesive resin which is arranged in each of the bus-bar storage grooves, and fixes the plurality of bus bars to the holder;
and the plurality of bus bars include bus-bar lead terminals which are respectively connected to coil lead terminals of the stator coils for the plurality of phases, which are corresponded to the bus bars;
and the bus-bar lead terminals are formed in such a way that the bus-bar lead terminals are protruded from the bus bars to the axis direction of the stator;
and the plurality of bus-bar storage grooves are formed by using a plurality of partitions which are concentrically arranged in a diameter direction of the stator via gaps;
and in the plurality of partitions, lengths, in the axis direction, of the most outer circumference partition, which is positioned at the most outer circumference side in the diameter direction, and the most inner circumference partition, which is positioned at the most inner circumference side in the diameter direction, are longer than lengths, in the axis direction, of a plurality of middle partitions, which are positioned between the most outer circumference partition and the most inner circumference partition;
and the plurality of middle partitions are configured in such a way that a plurality of middle partitions, of which lengths in the axis direction are different from each other, are mixed.

8 more elements

A manufacturing method of a rotary electric machine which includes

a stator which includes stator coils for a plurality of phases at an inner circumference portion of a stator core which is formed in an annular shape;
a rotor which is inserted to central space of the stator, and includes a plurality of magnetic poles at an outer circumference portion;
and
a connection component which is mounted at least at one end portion in an axis direction of the stator, and mutually connects the stator coils for the plurality of phases, and holds bus bars which feed an electric current to the stator coils for the plurality of phases;
in which
the connection component includes a holder made of an insulating material, which is formed in an annular shape, and is mounted at the stator in a state where one end portion in an axis direction of the connection component is faced to the one end portion in the axis direction of the stator, and includes a plurality of bus-bar storage grooves having an annular shape, which are concentrically arranged at the other end portion in the axis direction of the connection component, a plurality of bus bars having an annular shape, which are respectively installed in the plurality of bus-bar storage grooves, and are respectively corresponded to the plurality of phases, and an adhesive resin which is arranged in each of the bus-bar storage grooves, and fixes the plurality of bus bars to the holder;
and the plurality of bus bars include bus-bar lead terminals which are respectively connected to coil lead terminals of the stator coils for the plurality of phases, which are corresponded to the bus bars;
and the bus-bar lead terminals are formed in such a way that the bus-bar lead terminals are protruded from the bus bars to the axis direction of the stator;
wherein
the manufacturing method includes a first step in which the adhesive resin is previously coated on the plurality of bus-bar storage grooves before the plurality of bus bars are installed to the plurality of bus-bar storage grooves;
a second step in which end portions in the axis direction of the bus-bar lead terminals are practically pressed in the axis direction, and the plurality of bus bars are inserted to the plurality of bus-bar storage grooves on which the adhesive resin is coated;
a third step in which the holder is mounted at the stator in such a way that one end portion in the axis direction of the holder is faced to one end portion in the axis direction of the stator;
and a fourth step in which the bus-bar lead terminals are connected to the coil lead terminals.

10 more elements

A manufacturing method of a rotary electric machine which includes

a stator which includes stator coils for a plurality of phases at an inner circumference portion of a stator core which is formed in an annular shape;
a rotor which is inserted to central space of the stator, and includes a plurality of magnetic poles at an outer circumference portion;
and
a connection component which is mounted at least at one end portion in an axis direction of the stator, and mutually connects the stator coils for the plurality of phases, and holds bus bars which feed an electric current to the stator coils for the plurality of phases;
in which
the connection component includes a holder made of an insulating material, which is formed in an annular shape, and is mounted at the stator in a state where one end portion in an axis direction of the connection component is faced to the one end portion in the axis direction of the stator, and includes a plurality of bus-bar storage grooves having an annular shape, which are concentrically arranged at the other end portion in the axis direction of the connection component, a plurality of bus bars having an annular shape, which are respectively installed in the plurality of bus-bar storage grooves, and are respectively corresponded to the plurality of phases, and an adhesive resin which is arranged in each of the bus-bar storage grooves, and fixes the plurality of bus bars to the holder;
and the plurality of bus bars include bus-bar lead terminals which are respectively connected to coil lead terminals of the stator coils for the plurality of phases, which are corresponded to the bus bars, and protrusions which are formed in such a way that the protrusions are protruded from the bus bars to the axis direction of the stator;
wherein
the manufacturing method includes a first step in which the adhesive resin is previously coated on the plurality of bus-bar storage grooves before the plurality of bus bars are installed to the plurality of bus-bar storage grooves;
a second step in which end portions in the axis direction of the protrusions of the bus bars are practically pressed in the axis direction, and the plurality of bus bars are inserted to the plurality of bus-bar storage grooves on which the adhesive resin is coated;
a third step in which the holder is mounted at the stator in such a way that one end portion in the axis direction of the holder is faced to one end portion in the axis direction of the stator;
and a fourth step in which the bus-bar lead terminals are connected to the coil lead terminals.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/190,280Filed 23 Jun 2016
Priority: JP 2016-03383025 Feb 2016
Published: 31 Aug 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02K 3/28
Windings characterised by the conductor shape, form or construction, e.g. with bar conductors: layout of windings or of connections between windings
H02K 3/522
Applicable to stators only: for generally annular cores with salient poles
H02K 15/32
Manufacture of winding connections: manufacture of terminal arrangements; Connecting the terminals to external circuits
H02K 15/33
Manufacture of winding connections: connecting winding sections; Forming leads; Connecting leads to terminals