CN104253500A

CN104253500A - Three-phase Motor, Enclosed Compressor And Refrigeration Cycle Device

Info

Publication number: CN104253500A
Application number: CN201410258882.1A
Authority: CN
Inventors: 藤末义和; 荒井利夫
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2013-06-26
Filing date: 2014-06-12
Publication date: 2014-12-31
Anticipated expiration: 2034-06-12
Also published as: JP2015012630A; CN104253500B; CN203951287U; JP5950873B2

Abstract

The present invention provides a three phase motor, an enclosed compressor using the three phase motor and a refrigeration cycle device using the enclosed compressor. By using a stator wiring structure of forming a neutral point by the connection of fewer conducting wires, a stator is easy in wiring, excellent in reliability and low in cost. The three phase motor (52)comprises a plurality of windings (2u, 2v, 2w) supplied to a three phase AC power supply, a plurality of neutral lines (9u,9v,9w) connecting the windings (2u,2v,2w), and the neutral point (20) for connecting the plurality of neutral lines (9u,9v,9w) mutually, wherein the plurality of neutral lines (9u,9v,9w) are conducting wire sets formed by gathering a plurality of conducting wires, and the conducting wire set of at least one of the plurality of neutral lines (9u,9v,9w) is segmented and is connected with the other neutral lines to form a plurality of neutral points.

Description

Threephase motor, hermetic type compressor and refrigerating circulatory device

Technical field

The mode of connection that the present invention relates to centering point improve threephase motor, use the hermetic type compressor of this threephase motor and use the refrigerating circulatory device of this hermetic type compressor.

Background technology

In the past, as the mode of connection of the stator of the threephase motor driven by three-phase alternating-current supply used in refrigerating circulatory device etc., there is such as Y wiring as shown in Figure 6.In this Y wiring, formation is needed to be put together to by the neutral line of a pair winding 2u, 2v, 2w from 3 phases (U phase, V phase, W phase) neutral point 20 of wiring together.The wire of three neutral lines is intensively wired to neutral point 20.In this case, the connection each other of three neutral lines is realized by methods such as solder, TIG welding, solder brazing, the links undertaken by crimp type terminal.

The connection each other of the neutral line of Y wiring as above due to the number of its wire very many, therefore, wiring operation cost time.So the formation method of following neutral point is known: neutral point is divided into two and by the every two respectively wiring (such as with reference to patent documentation 1) in three neutral lines.

At first technical literature

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2000-232745 publication

Summary of the invention

The problem that invention will solve

But the number of wire is still many for neutral point as above, therefore, a lot of wire must be interconnected to form neutral point, not only the wiring activity duration is long, and the possibility producing bad connection is high, has problems in reliability.In addition, if the wiring number of neutral point increases, then the insertion operation of insulating element becomes difficulty, also there is the possibility producing defective insulation.

The present invention considers problem as above and makes, its object is to provide a kind of threephase motor, in this threephase motor, by the wiring structure of following stator, make the wiring in stator easy, excellent in reliability and cost is low, in the wiring structure of this stator, the wire connection each other few than ever by number forms neutral point.In addition, its object is to provide a kind of use the hermetic type compressor of this threephase motor and use the refrigerating circulatory device of this hermetic type compressor.

For solving the scheme of problem

In order to solve above-mentioned problem, threephase motor of the present invention has: be supplied to multiple windings of three-phase alternating-current supply, with the many neutral lines of described winding switching and neutral point that the described many neutral lines are connected to each other, it is characterized in that, the described neutral line is the wire group collected by multiple conducting wires and formed, by the wire component of at least one neutral line in the described many neutral lines being cut and being connected with other neutral lines, form multiple neutral point.

Hermetic type compressor of the present invention uses above-mentioned threephase motor.

Refrigerating circulatory device of the present invention uses above-mentioned hermetic type compressor.

The effect of invention

According to threephase motor of the present invention, by cutting down the wiring number of the neutral point in Y wiring, the fortification of wiring can be alleviated and prevent bad connection, the threephase motor that reliability is high can be provided.

Accompanying drawing explanation

Fig. 1 is the cutaway view of the compressor of embodiments of the present invention.

Fig. 2 is the Y wiring structure figure of the stator 1 of the threephase motor of embodiments of the present invention.

Fig. 3 is the winding diagram of the neutral point 20 of the threephase motor of embodiments of the present invention 1.

Fig. 4 is the winding diagram of the neutral point 20 of the threephase motor of embodiments of the present invention 2.

Fig. 5 is the winding diagram of the neutral point 20 of the threephase motor of embodiments of the present invention 3.

Fig. 6 is the winding diagram of the Y mode of connection in threephase motor in the past.

Description of reference numerals

1 stator, 2u winding, 2v winding, 2w winding, 3 magnetic pole of the stator, 4 yoke iron cores, 5 rotors, the 9u neutral line, the 9v neutral line, the 9w neutral line, 10 stator cores, 20 neutral points, 30 jumpers, 50 closed containers, 51 compression mechanical parts, 52 threephase motors, 53 bent axles, 54 suction pipes, 55 reservoirs, 56 discharge pipes, 100 hermetic type compressors.

Embodiment

Below, based on accompanying drawing, embodiments of the present invention are described.In addition, the present invention is not limited by the execution mode of following explanation.In addition, in figures in the following, the magnitude relationship of each structure member is sometimes different from practical structures.

Execution mode 1.

Fig. 3 is the winding diagram of the neutral point 20 of the motor of embodiments of the present invention 1.

First, the structure of compressor is described based on Fig. 1.

Fig. 1 is the cutaway view of the common hermetic type compressor 100 that refrigerating circulatory device uses.

Hermetic type compressor 100 for housing, is accommodated with compression mechanical part 51, threephase motor 52 and bent axle 53 etc. with closed container 50 in inside.

Threephase motor 52 is formed by stator 1 and rotor 5, and becomes following structure: by supplying three-phase alternating-current supply to stator 1, rotor 5 is rotated.

The gas refrigerant of the refrigerant loop (not shown) of refrigerating circulatory device is inhaled into from suction pipe 54, enters compression mechanical part 51 and is compressed, discharge as high temperature, high-pressure refrigerant from discharge pipe 56 through reservoir 55.

Then, the wiring structure of 3 phases in the stator 1 of threephase motor 52 is described based on Fig. 2.

Fig. 2 represents the stator 1 applying common threephase motor 52 of the present invention.

This stator 1 has: terminal U, V, W of being supplied to three-phase alternating-current supply; And stator core 10, this stator core 10 has the yoke iron core 4 of the multiple magnetic pole of the stator 3 (stator pole) configured at spaced intervals in the circumferential and the outer circumferential side linking these magnetic pole of the stator 3.For each magnetic pole of the stator 3 of this stator core 10, be separately installed with winding 2u, 2v, 2w of three-phase Y connection line.

In stator 1, corresponding winding 2u, 2v, 2w respectively respectively mutually with total 6 pole of 2 poles is in series configured to three-phase Y connection line.In addition, this threephase motor 52 to have in stator 1 configuration coaxially and has the rotor 5 of magnetic pole.

About this 3 phase of U, V, W, winding 2u, 2v, the 2w of a pair (2 pole) are relatively arranged respectively on the radial direction of stator 1, form winding 2u, 2v, 2w in series wiring respectively of each a pair of each phase.

And the neutral line 9w of neutral line 9v, the neutral line 9u from the winding 2u of U phase of the winding 2v from V phase in stator 1 and the winding 2w from W phase links together at the neutral point 20 of a position.The neutral line 9u, 9v, 9w are formed by the wire group tied together by multiple conducting wires.As wire, enumerate such as metal wire made of copper.

Then, use Fig. 3 that the wiring structure of the neutral point 20 of the threephase motor 52 of embodiments of the present invention 1 is described.

Shown in Fig. 3 two neutral point 20 is divided into two by the wire of the neutral line 9v by V phase and is connected with the neutral line 9u of U phase and the neutral line 9w of W phase and is formed.And then, be constructed as follows structure: between formed two neutral points 20, overlap jumper 30 and make its conducting.When being connected to each other by wire, wiring can be carried out by solder, TIG welding, solder brazing, crimp type terminal etc.

By forming neutral point 20 like this, become following structure: with as prior art by compared with situation about connecting with the 2 mutually corresponding neutral lines, wire less for number is connected at neutral point 20, thus can alleviate wiring fortification, prevent bad connection.

Execution mode 2.

Fig. 4 represents the winding diagram of the neutral point 20 of the threephase motor 52 of embodiments of the present invention 2.

In addition, the Y wiring structure self of the stator 1 of threephase motor 52 is identical with execution mode 1.

The neutral line 9u of the neutral line 9v, U phase of V phase and the wire of the neutral line 9w of W phase are divided into two and are connected be divided into two 3 and form neutral point 20 by the neutral point of two shown in Fig. 4 20 respectively.

Execution mode 3.

Fig. 5 represents the winding diagram of the neutral point 20 of the threephase motor 52 of embodiments of the present invention 3.

Neutral point 20 shown in Fig. 5 connects one end of jumper 30 at the leading section of the neutral line 9u of the neutral line 9v, U phase of V phase and the wire of the neutral line 9w of W phase, is connected to each other the other end of the jumper 30 of three-phase and is formed.

By forming neutral point 20 like this, become following structure: with as prior art by compared with situation about connecting with the 2 mutually corresponding neutral lines, less only mutually corresponding to one wire is connected with one end of jumper 30, thus can alleviate wiring fortification, prevent bad connection.

The wiring structure of the neutral point of the Y wiring of execution mode 1 ~ 3 can adopt in all threephase motors, but preferably as the hermetic type compressor of such as refrigerator or air-conditioning motor and adopt.

In addition, in execution mode 1 ~ 3, be provided with the magnetic pole of the stator of 6 poles at the stator 1 of threephase motor 52, but number of poles being not particularly limited.In addition, in stator 1, illustrate that winding 2u ~ 2w series wiring correspondence respectively respectively mutually with total 6 pole of 2 poles becomes the example of three-phase Y connection line, but self-evidently also winding 2u ~ 2w can be wired as three-phase Y connection line side by side.

Claims

1. a threephase motor, has: be supplied to multiple windings of three-phase alternating-current supply, with the many neutral lines of described winding switching and neutral point that the described many neutral lines are connected to each other, it is characterized in that,

The described neutral line is the wire group collected by multiple conducting wires and formed, and by the wire component of at least one neutral line in the described many neutral lines being cut and being connected with other neutral lines, forms multiple described neutral point.

2. threephase motor as claimed in claim 1, is characterized in that,

By the wire group of a neutral line in the described many neutral lines being divided into two and being connected with other neutral lines, form described neutral point two positions, connected by the described neutral point of overlap joint line by two positions.

3. threephase motor as claimed in claim 1, is characterized in that,

All wire groups of the described many neutral lines are divided into two, the wire be divided into two is connected to make the described many neutral lines be engaged with each other, thus form the described neutral point of two positions.

4. a hermetic type compressor, uses the threephase motor according to any one of claim 1 ~ 3.

5. a refrigerating circulatory device, uses the hermetic type compressor described in claim 4.