CN1340237A

CN1340237A - Motor

Info

Publication number: CN1340237A
Application number: CN 00803643
Authority: CN
Inventors: 川村清隆; 二見俊彦; 稻葉好昭; 深川勝己; 今澤和基
Original assignee: Toshiba Carrier Corp
Current assignee: Carrier Japan Corp
Priority date: 1999-02-10
Filing date: 2000-02-07
Publication date: 2002-03-13
Anticipated expiration: 2020-02-07
Also published as: MY128073A; JP2000232745A; WO2000048292A1; TW561668B; CN100442640C

Abstract

Pairs (two poles) of coils (2u, 2v, 2w) for respective three phases U, V and W are opposed to each other in the radial direction of a stator (1) and connected parallel respectively. A neutral line (9v) of the V-phase coil (2v) is connected to the neutral lines (9u, 9w) of the respective U-phase and W-phase coils (2u, 2w) at the points (20uv, 20vw), thereby forming a neutral point of a three-phase star connection. That is, every two neutral lines of the neutral lines (9u to 9w) are connected at the two points to form a neutral point, and therefore the neutral point is formed by connection of neutral lines the number of which is smaller than conventional.

Description

Motor

Technical field

The present invention relates to a kind of by the motor of insulating component with respect to concentrated winding (concentrated winding) structure of the direct 3 phase star-star connection coils of reeling of a plurality of magnetic pole tooths of stator, specifically, relate to a kind of neutral line syndeton of each coil through improved motor.

Background technology

Figure 18 and Figure 19 illustrate the stator 1 of the general motor that the present invention is suitable for.This stator comprises that its a plurality of (be 6 utmost points this moment) magnetic pole tooth 12 that has along the circumferential direction leaves the stator core 10 of arranged spaced.Each magnetic pole tooth 12 difference (by insulation frame 3) with respect to this stator core 10 are installed the coil 2 of 3 phase star-star connections.

In the motor of this 3 phase star-star connections, made 6 neutral lines of 6 polar curve circles be connected to each other the formation neutral point in the past.For example, the existing motor wiring figure of the coils from parallel connection of coils wiring of 1 each phase 2 utmost point of stator shown in Figure 20, total 6 utmost points.

Among Figure 20, for U, V, this 3 phase of W, opposed a pair of (2 utmost point)

coil

2u, 2v, the 2w of being provided with on definition 1 radial direction respectively, each that constitutes each phase is to coil 2u, 2v, 2w tie also respectively.So the 6 neutral line 90u～90w of the coil 2u～2w by making above-mentioned total 6 utmost points are connected to each other, and form the neutral point in the 3 phase star-star connections.

At this moment, can finish 6 connections that neutral line 90u～90w is mutual by means such as welding, soldering, lead connections.And in the structure with respect to each magnetic pole tooth 12 direct coiling coil, then form connection with circuit substrate etc.

There is following problems in aforesaid existing motor.Specifically, must be connected to each other many neutral lines (6 utmost point formula occasions shown in Figure 20 are 6) in order to form neutral point, thereby exist connect trouble, and aspect reliability the higher this problem of the possibility of generation bad connection.And, problem is arranged also aspect cost with connections such as circuit substrates.

Summary of the invention

The present invention has considered these problems just, and its purpose is, provide a kind of by means of available ratio in the past the neutral line of less radical be connected to form this stator wiring construction of neutral point each other, thereby the motor that wiring is easy in the stator, reliability is high and cost is low.

In order to reach this purpose, motor provided by the present invention, it is characterized in that, have rotor and stator, described stator has: a plurality of magnetic pole tooths that along the circumferential direction leave arranged spaced, and 3 phase star-star connection coils of the concentrated winding that directly winds the line with respect to these magnetic pole tooths by insulating component, with respect to the neutral line of any 1 phase coil in the middle of 3 phase coils in the described stator, the neutral line with other 2 phase coils respectively connects 1 place respectively.

Utilize this motor, with respect to the neutral line of any 1 phase coil, the neutral line with other 2 phase coils respectively connects 1 place respectively, forms the neutral point in the 3 phase star-star connections.That is to say, by adding up to coupling part, 2 place to make 2 neutral lines be interconnected to form this neutral point respectively.So, available radical than the neutral line that in the past lacked mutual be connected to form neutral point.Therefore, can provide the motor that wiring is easy in a kind of stator, reliability is high and cost is low.

In this motor, can constitute each phase coil of described stator by the multipole coil that is connected in parallel mutually, continuous winding between this multipole coil, the line between simultaneously will this multipole coil is as the described neutral line.

At this moment, described stator also can constitute, each has 2 polar curve circles mutually, described rotor has 4 utmost point magnetic poles, and the insulating component of described stator is the insulation frame that is clipped between each magnetic pole tooth and the coil, this insulation frame has corresponding with each magnetic pole tooth of described stator, leave along described stator circumference direction and at interval to form, from described stator end at the outstanding a plurality of protuberances of axis direction, constitute in the 2 polar curve circles of described each phase of stator, turn back at described insulation frame protuberance from the described line of the wherein coiling terminal extension of a polar curve circle, and be connected with the coiling top of another polar curve circle.

This occasion preferably makes its part of turning back of described line of described insulation frame protuberance roughly the same apart from the height that the height of described stator end and the described neutral line interconnect the described stator end of part distance.

In addition, motor provided by the present invention, it is characterized in that, have rotor and stator, described stator has: a plurality of magnetic pole tooths that along the circumferential direction leave arranged spaced, and 3 phase star-star connection coils of the concentrated winding that directly winds the line with respect to these magnetic pole tooths by insulating component, constitute each phase coil of described stator with the multipole coil that is connected in parallel mutually, continuous winding between multipole arbitrarily coil in described stator, line between simultaneously will this multipole coil is as the neutral line of each phase coil, and the neutral line of 3 phase coils interconnects 1 place.

Utilize this motor, connect 1 place each other, can form the neutral point in the 3 phase star-star connections by 3 neutral lines of total (line) that make 3 phase coils.So, this moment also available radical than the neutral line that in the past lacked mutual be connected to form neutral point.Therefore, can provide the motor that wiring is easy in a kind of stator, reliability is high and cost is low.

Also can be with the described neutral line of each phase coil with respect to the opposite side of described stator arrangement at the lead-out wire of each phase coil.

Available pressure line terminal of connection that the described neutral line is mutual or crimp type terminal form.Use the method, compare, can connect very easily and reliably with utilizing welding, soldering etc.

The insulating component of described stator also can be the insulation frame that is clipped between each magnetic pole tooth and the coil, be formed with the terminal fixed part that the crimp type terminal with peristome is kept on this insulation frame, form the described neutral line and connect each other by being pressed into this neutral line from its peristome with respect to described crimp type terminal.

Use the method, just can form this neutral line and connect each other as long as be pressed into the neutral line from its peristome, so can connect very easily and reliably with respect to crimp type terminal.And, keep this crimp type terminal by insulation frame terminal fixed part, so can (by the insulation frame) the mutual coupling part of the neutral line reliably be kept with respect to stator.

The insulating component of described stator also can be the insulation frame that is clipped between each magnetic pole tooth and the coil, is formed with the neutral line maintaining part that keeps in order to the front and rear part to coupling part in the described neutral line on this insulation frame.Use the method, can be by insulation frame neutral line maintaining part, (by the insulation frame) makes the mutual coupling part of the neutral line remain on assigned position with respect to stator.

The insulating component of described stator also can be the insulation frame that is clipped between each magnetic pole tooth and the coil, that this insulation frame has is corresponding with each magnetic pole tooth of described stator, along described stator circumference direction leave form at interval, from the end of described stator at the outstanding a plurality of protuberances of axis direction, the described protuberance that described insulation frame is adjacent is mutual, and row arrangement should the interconnected described neutral line, with pressure line terminal these neutral lines is interconnected simultaneously.

At this moment, the mutual coupling part of the described neutral line, also can with the corresponding configuration of the mutual boundary member of along the circumferential direction adjacent coil, and be disposed on the envelope of a plurality of protuberances in the described insulation frame.

Brief Description Of Drawings

Fig. 1 comprises stator core at interior winding diagram in motor the 1st example of the present invention.

Fig. 2 is the pattern winding diagram of reduced representation winding diagram shown in Figure 1.

Fig. 3 is that motor shown in Figure 1 comprises direction of winding etc. at interior winding diagram.

Fig. 4 is that motor shown in Figure 1 disposes the plane graph that a side is looked from the neutral line.

Fig. 5 is the part elevation figure that the expression motor neutral line shown in Figure 1 disposes a side.

Fig. 6 with shown in the cross section of stator core be motor poles tooth shown in Figure 1 and the insulation frame shape.

Fig. 7 is shown in the X-X line section being the mutual connection status of the neutral line among Fig. 5.

Fig. 8 is the stereogram of pressure line terminal shown in Figure 7.

Fig. 9 is the stator partial plan layout that is used for representing the terminal fixed part of motor the 2nd example insulation frame of the present invention.

Figure 10 is the view that is used for amplifying Y direction among Fig. 9 of presentation graphs 9 insulation frame terminal fixed parts.

Figure 11 is a Z-Z line cutaway view among Figure 10.

Figure 12 comprises stator core at interior winding diagram in motor the 3rd example of the present invention.

Figure 13 is the pattern winding diagram of reduced representation winding diagram shown in Figure 12.

Figure 14 comprises stator core and direction of winding etc. at interior winding diagram in motor the 4th example of the present invention.

Figure 15 is the pattern winding diagram of reduced representation winding diagram shown in Figure 14.

Shown in Figure 16 and Fig. 7 the same manner is connection status when adopting pressure line terminal shown in Figure 8 in the motor shown in Figure 14.

Figure 17 is the stereogram of another mutual coupling part of routine neutral line in the expression motor shown in Figure 14.

Figure 18 is the plane graph of the general motor stator that is suitable for of expression the present invention.

Figure 19 is the longitudinal section of motor stator shown in Figure 180.

Figure 20 comprises stator core at interior winding diagram in the existing motor.

The best mode that carries out an invention

The invention process form is described with reference to the accompanying drawings.Shown in Fig. 1 to Figure 17 is motor example of the present invention.In addition, Fig. 1 adds same numeral to the part identical with Figure 18 and general motor shown in Figure 19, simultaneously suitably with reference to Figure 18 and Figure 19 explanation to the invention process form shown in Figure 17.

[the 1st example]

Earlier the 1st example of the present invention is described with Fig. 1 to Fig. 8, Figure 18 and Figure 19.

The stator 1 of the general motor that the present invention is suitable for shown in Figure 18 and Figure 19.The stator core that this stator 1 is had comprises: a plurality of (be 6 utmost points this moment) magnetic pole tooths 12 and the yoke iron core 14 that is connected these magnetic pole tooth 12 outer circumferential sides of along the circumferential direction leaving arranged spaced.The coil 2 of 3 phase star-star connections is installed with respect to each magnetic pole tooth 12 difference (by insulation frame 3) of this stator core 10.

Following Fig. 1 to Fig. 3 illustrates the winding diagram of this example motor.Shown in Fig. 1 to Fig. 3 (particularly Fig. 2), in this example motor stator 1, it is 3 phase stars that the coil 2u～2w of each phase 2 utmost point, total 6 utmost points is connected in parallel.And as shown in Figure 4, the rotor R that this motor had comprises the magnetic pole of 4 utmost points of arranged coaxial in stator 1.

Return Fig. 1 to Fig. 3, for U, V, this 3 phase of W, opposed being provided with (with reference to Fig. 1 or Fig. 3) a pair of (2 utmost point)

coil

2u, 2v, 2w on stator 1 radial direction respectively, a pair of

coil

2u, 2v, 2w that constitutes each phase are respectively and tie.

So, stator 13 quite in, with respect to the neutral line 9v of V phase coil 2v, make U mutually be connected 1 place at 20uv, 20vw respectively with neutral line 9u, the 9w of

W phase coil

2u, 2w.

Here as shown in Figure 4, directly with respect to stator 1 each magnetic pole tooth 12 direct coiling coil 2u～2w, form concentrated winding construction by insulation frame 3.And as Fig. 1 or shown in Figure 3, each that constitutes each phase to coil (2u, 2u)～(2w, 2w) but between continuous winding.So each of the such continuous winding of process constitutes each neutral line 9u～9w to the line between coil (2u, 2u)～(2w, 2w).

The above-mentioned neutral line (line) 9u～9w is disposed at opposite side with lead-out wire 8u～8w (referring to figs. 1 through Fig. 3) of each phase coil 2u～2w with respect to stator 1 axis direction.That is to say that lead-out wire 8u～8w of each phase coil 2u～2w just becomes with respect to stator 1 and draws from the opposite side of Fig. 4 or part shown in Figure 5.In addition, Fig. 3 disposes a side by represent lead-out wire 8u～8w with solid line, dots the neutral line (line) 9u～9w and disposes a side, illustrates from the state of lead-out wire 8u～8w configuration unilateral observation stator 1.

Then describe the above-mentioned magnetic pole tooth 12 and the above-mentioned insulation frame 3 that is assemblied on the stator 1 of stator 1 in detail.As shown in Figure 6, each magnetic pole tooth 12 comprises: from yoke iron core 14 to inboard 12a of mobile jib portion that extends of radial direction and the interior perimembranous 12b that is formed at this 12a of mobile jib portion front.Should interior perimembranous 12b circumferentially mobile jib portion 12a both sides expansion outside above-mentioned rotor R (with reference to Fig. 4).

So, make it the inner face of the part (said winding slot) 16 that yoke unshakable in one's determination 14 and each magnetic pole tooth 12 roughly surround in the covering stator iron core 10 during assembling insulation frame 3.That is to say that insulation frame 3 comprises: the hollow I-beam belly 30 that covers each magnetic pole tooth 12 12a of mobile jib portion; Cover interior all flange parts 31 in the perimembranous 12b outside in each magnetic pole tooth 12; And the peripheral outer lips portion 32 that covers yoke 14 inboards unshakable in one's determination.So,, be wound with coil 2u～2w on every side at each magnetic pole tooth 12 (the 12a of mobile jib portion) by this insulation frame 3 as Fig. 4, Fig. 8 and shown in Figure 19.

Then, as Fig. 4 and shown in Figure 5, that this insulation frame 3 has is 12 corresponding with each magnetic pole tooth of stator 1, leave 6 pairs of protuberances 33 that form at interval along stator 1 circumferencial direction.These protuberances 33 are provided with at axis direction outstanding (with reference to Fig. 5) by stator 1 end 1a from above-mentioned peripheral outer lips 32 (with reference to Fig. 4) of portion.

So, (corresponding) protuberance 33 with magnetic pole tooth 12 adjacent on the circumferencial direction each other and row arrangement should interconnected 2 neutral lines (9u, 9v), (9v, 9w), make these neutral lines (9u, 9v), (9v, 9w) connect 20uv, 20uw each other respectively simultaneously.At this moment, the mutual coupling part 20uv of neutral line 9u～9w and 20vw respectively with circumferencial direction on

adjacent coil

2u, 2v and the corresponding configuration of the mutual boundary member of 2w, 2u.

Here, the mutual connection of neutral line 9u～9w forms with pressure line terminal 40 as shown in Figure 7.This pressure line terminal 40 forms the roughly U font cross section shape with peristome 40a as shown in Figure 8 before connection, its inner face one side is formed with jog 40b.So, this pressure line terminal 40 is just by utilizing specific purpose tool or device to rivet, and is as shown in Figure 7, compacted around 2 neutral line 9u～9w that should connect, utilize its jog 40b that neutral line 9u～9w coating layer is staved simultaneously, make the mutual conducting of this neutral line 9u～9w.

Then, as shown in Figure 5, be formed with the neutral line maintaining part 36 that is used to keep neutral line 9u～9w on insulation frame 3 each protuberance 33.Each neutral line maintaining part 36 is constituted to the outstanding a pair of protuberance 34 (also with reference to Fig. 4) of peripheral direction both sides about in the of 35 by the protuberance slot part 35 that side formed 33 outer Mondays with from this slot part.So as shown in Figure 4 and Figure 5, the front and rear part of coupling part 20uv, 20vw just can reliably be kept by a pair of jut 34 of neutral line maintaining part 36 especially among neutral line 9u～9w.

Here, as shown in Figure 4 each neutral line (line) 9u～9w along the outer ring of a plurality of protuberances 33 in the insulation frame 3 around the envelope that makes it to form these protuberances 33.So the mutual coupling part 20uv of the neutral line, 20vw also are disposed on the envelope of a plurality of protuberances 33 in the insulation frame 3.

Then, as shown in Figure 4 and Figure 5, among 2 polar curve circle 2u of formation stator 1 each phase, 2v, the 2w, turn back at the protuberance 33 of insulation frame 3 from the coiling terminal 7u of wherein a

polar curve circle

2u, 2v, 2w, the neutral line (line) 9u, 9v, the 9w that 7v, 7w extend, and be connected with another polar curve circle 2u, the coiling top 6u of 2v, 2w, 6v, 6w.

At this moment, the neutral line (line) 9u～9w in insulation frame 3 protuberances 33 turn back part apart from the height of stator end 1a and the mutual coupling part 20uv of neutral line 9u～9w, 20vw apart from the height of stator end 1a roughly the same (with reference to Fig. 5).

In addition, though explanation is that neutral line 9v with respect to the V phase coil 2v in the stator 1 makes U be connected the situation at 1 place mutually with neutral line 9u, the 9w of

W phase coil

2u, 2w respectively in this example, but the invention is not restricted to this, with respect to the neutral line of any 1 phase coil in the middle of 3 phase coils in the stator 1, respectively the neutral line of other 2 phase coils is respectively connected 1 place and get final product.

Specifically, also can make V be connected 1 place with neutral line 9v, the 9w of

W phase coil

2v, 2w mutually with respect to the neutral line 9u of U phase coil 2u respectively, and can make U be connected 1 place with neutral line 9u, the 9v of

V phase coil

2u, 2v mutually respectively with respect to the neutral line 9w of W phase coil 2w.

Next the action effect that constitutes this example of being formed by this is described.Utilize this example, by with respect in the stator 13 quite in neutral line 9u～9w of any 1 phase coil 2u～2w, make neutral line 9u～9w of other 2 phase coils 2u～2w respectively connect 1 place respectively, can form the neutral point of 3 phase star-star connections.

Specifically because by adding up to coupling part, 2 place to make 2 neutral line 9u～9w be connected to form this neutral point each other respectively, thereby available radical than the neutral line that in the past lacked mutual be connected to form neutral point.Therefore, can provide the motor that wiring is easy, reliability is high and cost is low in a kind of stator 1.

At this moment,, thereby compare, can carry out very easily and connection reliably with utilizing welding or soldering etc. because the mutual connection of neutral line 9u～9w forms with pressure line terminal 40.

In addition, each protuberance 33 of insulation frame 3 is formed with the neutral line maintaining part 36 that is used to keep neutral line 9u～9w, thereby can utilize this neutral line maintaining part 36, (by insulation frame 3) makes the mutual coupling part of neutral line 9u～9w remain on the assigned position with respect to stator 1.

[the 2nd example]

According to Fig. 9～Figure 11 the 2nd example of the present invention is described below.This example, extremely shown in Figure 11 as Fig. 9, substitute above-mentioned pressure line terminal 40 with crimp type terminal fixing on the insulation frame 3 42 and carry out the mutual connection of neutral line 9u～9w, except this point is different with above-mentioned the 1st example, other constitute identical to above-mentioned the 1st example shown in Figure 8 with Fig. 1.

Specifically, to shown in Figure 11, above-mentioned insulation frame 3 is formed with the corresponding terminal fixed part 37 with each coupling part 20uv, 20vw as Fig. 9.This terminal fixed part 37 has a pair of holding plate member 38 up and down outstanding on stator 1 peripheral direction, keeps crimp type terminal 42 between the two at this a pair of holding plate member 38.In addition, the leading section of a pair of holding plate member 38 forms taper in order to insert the neutral line 9u～9w of ubi infra easily.

This crimp type terminal 42 as shown in Figure 10 and Figure 11, forms and is the roughly U font cross section shape with peristome 42a, and its inner face one side is formed with a plurality of blade-like rib 42b that extend in the cross section direction.So, this crimp type terminal 42 is just by being pressed into 2 neutral line 9u～9w that should connect successively from its peristome 42a, fix this neutral line 9u～9w, utilize each blade-like rib 42b to stave the coating layer of neutral line 9u～9w simultaneously, make the mutual conducting of this neutral line 9u～9w.

The following describes the action effect that constitutes this example of forming by this.Utilize this example,, form the mutual connection of this neutral line 9u～9w, thereby can carry out connecting very easily and reliably owing to can only be pressed into neutral line 9u～9w from its peristome 42a with respect to crimp type terminal 42.And, by terminal fixed part 37 these crimp type terminals 42 of maintenance of insulation frame 3, thereby the mutual coupling part 20uv of neutral line 9u～9w, 20vw (by insulation frame 3) can be kept with respect to stator 1 reliably.

[the 3rd example]

According to Figure 12 and Figure 13 the present invention's the 3rd example is described below.This example, as Figure 12 and shown in Figure 13, each that constitutes each phase is to

coil

2u, 2v, 2w series wiring respectively, and except this point is different with above-mentioned the 1st example, other constitute with Fig. 1 above-mentioned the 1st example extremely shown in Figure 8 roughly the same.

And this example, as Figure 12 and shown in Figure 13, with respect to stator 13 quite in the neutral line 9w of W phase coil 2w, U is connected at 1 20uw of place, 20vw with neutral line 9u, the 9v of

V phase coil

2u, 2v mutually.

In addition, also be not limited to said circumstances in this example, with respect to stator 13 quite in the neutral line of any 1 phase coil, the neutral line of other 2 phase coils is connected at 1 place gets final product.Specifically, V is connected at 1 place with neutral line 9v, the 9w of

W phase coil

2v, 2w mutually, and, U is connected at 1 place with neutral line 9u, the 9w of

W phase coil

2u, 2w mutually.

So, this example occasion, by with respect to stator 13 quite in neutral line 9u～9w of any 1 phase coil 2u～2w, make neutral line 9u～9w of other 2 phase coils 2u～2w connect 1 place even respectively, form the neutral point in the 3 phase star-star connections, thereby identical with above-mentioned the 1st example, the connection more mutual more in the past than the neutral line that lacked of also available radical forms neutral point.Therefore, can provide the motor that wiring is easy, reliability is high and cost is low in a kind of stator 1.

[the 4th example]

According to Figure 14 to Figure 16 the 4th example of the present invention is described below.This example to shown in Figure 16, makes the neutral line of 3 phase coil 2u～2w connect 1 place each other as Figure 14, and except this point is different with above-mentioned the 1st example, other constitute with Fig. 1 roughly the same to above-mentioned the 1st example shown in Figure 6.

So, this example occasion, as Figure 14 and shown in Figure 15, depart from mutually in a circumferential direction 300 degree positions, constitute mutually between out of phase 2 polar curve circles (2v, 2u), (2w, 2v), (2u, the 2w) continuous winding respectively.At this moment, make the line between per 2 polar curve circles (2v, 2u), (2w, 2v), (2u, 2w) of continuous winding be respectively 9vu, 9wv, 9uw, the neutral line of U, V, W each

phase coil

2u, 2v, 2w then is made of each 2 line (9vu, 9uw), (9vu, 9wv), (9wv, 9uw) respectively.

So line 9vu, the 9wv, the 9uw that constitute the neutral line of 3 phase coil 2u～2w connect at 1 20uvw of place each other.As shown in figure 16, carry out this neutral line (line) 9vu, the mutual connection of 9wv, 9uw with pressure line terminal same as shown in Figure 8 40.

Then explanation is by this action effect that constitutes this example of forming.Utilize this example, connect at 1 place each other by total 3 line 9vu, 9wv, the 9uw that makes the neutral line that constitutes 3 phase coil 2u～2w, can form the neutral point in the 3 phase star-star connections, thus can with radical than neutral line 9vu, the 9wv, the 9uw that lacked in the past mutual be connected to form neutral point.Therefore, can provide the motor that wiring is easy, reliability is high and cost is low in a kind of stator 1.

In addition, though among Figure 14 explanation be depart from a circumferential direction 300 degree positions, constitute mutually between out of phase 2 polar curve circles (2v, 2u), (2w, 2v), (2u, the 2w) situation of continuous winding respectively, the invention is not restricted to this.That is to say,, make in the stator 1 that continuous winding gets final product between any 2 polar curve circle 2u～2w no matter be not homophase or phase homophase mutually.

Here, in this example, also can use to be connected to substitute the connection based on above-mentioned pressure line terminal 40 shown in Figure 16 based on 44 both combinations of crimp type terminal shown in Figure 17 and terminal fixed part.Among Figure 17, be formed with the terminal fixed part 44 of upward opening on the above-mentioned insulation frame 3.This terminal fixed part 44 comprises: can parallelly accept side by side 3 line 9vu, 9wv, 9uw the 3 couples of slot part 44a and with each line 9vu, 9wv, 9uw under 3 jut 44b connecing of side impact.

And crimp type terminal 45 has and corresponding 3 slot parts of the slot part 44a of terminal fixed part 44 (peristome) 45a.At this moment, by crimp type terminal 45 is clamp-oned with respect to terminal fixed part 44, just line 9vu, 9wv, 9uw are pressed into crimp type terminal 45 each slot part 45a, the coating layer with line 9vu, 9wv, 9uw staves simultaneously, makes the mutual conducting of this neutral line.

In addition, though explanation is each situation of the coil 2u～2w (and magnetic pole tooth 12) of 2 utmost points, total 6 utmost points mutually in the above example, but basically, be provided with coil 2u～2w (and magnetic pole tooth 12) that each phase 3 is extremely above, total 9 is extremely above and also can use the present invention.

In addition, though the situation that is to use the integrated stator iron core 10 that yoke unshakable in one's determination 14 and each magnetic pole tooth 12 form as one of stator 1 explanation also can use yoke unshakable in one's determination 14 and each magnetic pole tooth 12 to form assembled split stator core.

In addition, " pressure line terminal " speech is meant the terminal component by wait terminal relatively large distortion carrying out wire rod itself to connect each other by riveted joint in this specification, and " crimp type terminal " speech is meant by being pressed into wire rod but does not almost follow the terminal component of the mutual connection of terminal distortion carrying out wire rod itself.

Claims

1. An electric motor, characterized in that, has a rotor and a stator,

The stator has: a plurality of magnetic pole teeth arranged at intervals in the circumferential direction, and a concentrated winding 3-phase star-connected coil directly wound with respect to these magnetic pole teeth through an insulating member,

With respect to the neutral line of any 1-phase coil among the 3-phase coils in the stator, the neutral lines of the other 2-phase coils are respectively connected to one place.

2. The motor according to claim 1, wherein the coils of each phase of the stator are constituted by multi-pole coils connected in parallel, and the wires are continuously wound between the multi-pole coils, while the phases between the multi-pole coils are wire as the neutral wire.

3. The electric motor according to claim 2, characterized in that,

Each phase of the stator has 2-pole coils, and the rotor has 4-pole magnetic poles,

And the insulating member of the stator is an insulating frame sandwiched between each magnetic pole tooth and the coil,

The insulating frame has a plurality of protrusions corresponding to the magnetic pole teeth of the stator, formed at intervals along the circumferential direction of the stator, protruding from the end of the stator toward the axial direction,

Among the 2-pole coils constituting each phase of the stator, the connection wire extending from the winding end of one pole coil is configured to turn back at the protruding portion of the insulating frame and to be in phase with the winding start end of the other pole coil. connect.

4. The motor according to claim 3, characterized in that, the height of the turn-back part of the connecting line of the protruding part of the insulating frame from the end of the stator is the same as the distance from the neutral line interconnection part to the stator. The ends are approximately the same height.

5. An electric motor, characterized in that it has a rotor and a stator,

The coils of each phase of the stator are composed of multi-pole coils connected in parallel, and wires are continuously wound between any multi-pole coils in the stator, and the connection between the multi-pole coils is used as the neutral line of each phase coil , The neutral wires of the 3-phase coils are connected to each other at 1 place.

6. The motor according to any one of claims 1, 2, and 5, wherein the neutral line of each phase coil is arranged on the opposite side of the lead-out line of each phase coil with respect to the stator.

7. The motor according to any one of claims 1, 2 and 5, characterized in that the connection between the neutral wires is formed by crimping wire terminals or crimping terminals.

8. An electric motor according to any one of claims 1, 2 and 5, characterized in that,

The insulating member of the stator is an insulating frame sandwiched between each magnetic pole tooth and the coil,

A terminal fixing portion for holding a crimp terminal having an opening is formed on the insulating frame,

The neutral wires are connected to each other by pressing the neutral wire into the crimp terminal through an opening thereof.

9. An electric motor according to any one of claims 1, 2 and 5, characterized in that,

A neutral wire holding part for holding the front and rear parts of the connecting part of the neutral wire is formed on the insulating frame.

10. An electric motor as claimed in any one of claims 1, 2 and 5, characterized in that,

The insulating frame has a plurality of protrusions protruding from the end of the stator in the axial direction corresponding to the magnetic pole teeth of the stator and formed at intervals along the circumferential direction of the stator,

The neutral wires to be connected to each other are arranged side by side between the adjacent protrusions of the insulating frame, and these neutral wires are connected to each other by crimping terminals.

11. The electric motor according to claim 10, wherein said neutral line interconnection portion is arranged corresponding to a boundary portion between coils adjacent in the circumferential direction.

12. The electric motor according to claim 10, wherein the interconnection portion of the neutral wires is arranged on the envelope of the plurality of protrusions in the insulating frame.