JP2000232745A - Compressor motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a highly reliable inexpensive compressor motor with a stator which can be connected easily such that a neutral point can be formed by connecting neutral lines the number of which is smaller than in the conventional example. SOLUTION: Three pairs (two poles) of coils 2u, 2v, and 2w are respectively provided for three phases of U-, V-, and W-phases, in a state where the coils 2u, 2v, and 2w are arranged facing opposite the radial direction of a stator 1, and the coils 2u, 2v, and 2w constituting the three phases are connected in parallel with each other. A neutral point of three-phase star rectifier connection is formed by connecting the neutral lines 9u and 9w from the U- and W- phase coils 2u and 2w to the neutral line 9v from the V-phase coil 2v at points 20uv and 20vw. Since the neutral point is formed by connecting the neutral lines to each other at a total of two connecting sections, the neutral point can be formed by connecting neutral lines, the number of which is smaller than that in the conventional example.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor motor having a structure in which a three-phase star-connected coil is directly wound on a plurality of magnetic pole teeth of a stator. The present invention relates to a compressor motor having an improved connection structure for sex wires.

[0002]

2. Description of the Related Art FIGS. 18 and 19 show a stator 1 of a general compressor motor to which the present invention is applied. The stator 1 includes a stator core 10 having a plurality of (in this case, 6 poles) magnetic pole teeth 12 arranged at intervals in the circumferential direction. Each magnetic pole tooth 1 of the stator core 10
2, three-phase star-connected coils 2 are mounted (via insulating frames 3).

In such a three-phase star-connected compressor motor, conventionally, six neutral wires from a six-pole coil are connected to each other to form a neutral point. For example, FIG. 20 shows a connection diagram of a conventional compressor motor in which a total of six pole coils, two poles each for each phase of the stator 1, are connected in parallel.

In FIG. 20, a pair (two poles) of coils 2u, 2v, and 2w are provided for three phases U, V, and W, respectively.
Are provided opposite to each other in the radial direction of the stator 1, and a pair of coils 2u, 2v, 2w constituting each phase are connected in parallel. By connecting the six neutral wires 90u to 90w from the coils 6u to 2w having a total of six poles to each other, a neutral point in the three-phase star connection is formed.

In this case, the connection between the six neutral wires 90u to 90w is made by means such as welding, soldering, connection by lead wires, or the like. In a structure in which a coil is wound directly on each magnetic pole tooth 12, a connection is made using a circuit board or the like.

[0006]

The conventional motor for a compressor as described above has the following problems. In other words, many neutral wires (six in the case of the six-pole type shown in FIG. 20) must be connected to each other to form a neutral point, which is troublesome and causes poor connection. Probable and has reliability issues. Further, when connection is made using a circuit board or the like, there is a problem in terms of cost.

The present invention has been made in view of such a point, and has a stator connecting structure that allows a neutral point to be formed by connecting a smaller number of neutral wires than conventional ones. It is an object of the present invention to provide a compressor motor that is easy to connect, excellent in reliability, and low in cost.

[0008]

A first means comprises a rotor and a stator, the stator having a plurality of circumferentially spaced magnetic pole teeth and these magnetic pole teeth. A three-phase star-connected coil is wound directly on the tooth, and a neutral wire from any one of the three phases of the stator is connected to a neutral wire from the other two-phase coils. An electric motor for a compressor, wherein a neutral wire is connected at each one point.

According to the first means, the neutral wire from the arbitrary one-phase coil is connected to the neutral wire from the other two-phase coils at each one point, whereby three Neutral points in the star connection are formed. That is, the neutral point is formed by connecting two neutral wires to each other at a total of two connection portions.

A second means is the first means, wherein each phase of the stator is constituted by a plurality of pole coils connected in parallel with each other, and the plurality of pole coils are continuously wound. The crossover between the coils of the plurality of poles is the neutral wire.

The third means comprises a rotor and a stator,
The stator has a plurality of magnetic pole teeth arranged at intervals in the circumferential direction, and a three-phase star-connected coil is directly wound around these magnetic pole teeth. The phase consists of a multi-pole coil connected in parallel with each other,
The winding between the plural-pole coils in the stator is continuously wound, and the crossover between the plural-pole coils is a neutral wire from each phase coil, and a neutral wire from the three-phase coil is formed. An electric motor for a compressor, wherein the electric motors are connected at one place.

According to the third means, a neutral point in the three-phase star connection is formed by connecting a total of three neutral wires (crossover wires) from the three-phase coils at one place. Is done.

[0013] A fourth means is that, in any one of the first to third means, the neutral wire of each phase is placed on the opposite side of the stator from the lead wire from each phase coil. It is arranged.

According to a fifth aspect, in any one of the first to third aspects, the connection between the neutral wires is made by using a crimp terminal or a press contact terminal.

According to the fifth means, in any one of the first to third means, the connection can be made extremely easily and reliably as compared with the case of welding, soldering or the like.

A sixth means is that in any one of the first to third means, an insulating frame for winding a coil around each magnetic pole tooth is attached to the stator, and an opening is formed in the insulating frame. A terminal fixing portion for holding a press contact terminal having a is formed,
The connection between the neutral wires is made by press-fitting the neutral wire into the press contact terminal from an opening thereof.

According to the sixth means, in any one of the first to third means, the neutral wires are connected only by press-fitting the neutral wires into the press contact terminals from the openings. The connection can be made very easily and reliably. Further, since the press-contact terminal is held by the terminal fixing portion of the insulating frame, the connection portion between the neutral wires can be reliably held on the stator (via the insulating frame).

According to a seventh aspect, in any one of the first to third aspects, an insulating frame for winding a coil around each magnetic pole tooth is attached to the stator, and the insulating frame is A neutral wire holding portion for holding portions before and after the connection portion in the sex wire is formed.

According to the seventh means, in any one of the first to third means, the connecting portion between the neutral wires is fixed (via the insulating frame) by the neutral wire holding portion of the insulating frame. It can be held in position relative to the child.

According to an eighth aspect, in any one of the first to third aspects, an insulating frame for winding a coil around each magnetic pole tooth is attached to the stator, and the insulating frame is fixed to the fixed frame. A plurality of protrusions formed at intervals in the circumferential direction of the stator corresponding to the respective magnetic pole teeth of the stator, and having a plurality of protrusions protruding from an end of the stator, between the adjacent protrusions The neutral wires to be connected to each other are arranged side by side, and these neutral wires are connected to each other by crimp terminals.

According to a ninth aspect, in the eighth aspect, a connection portion between the neutral wires is arranged corresponding to a boundary portion between coils adjacent in the circumferential direction.

According to a tenth aspect, in the eighth aspect, a connection portion between the neutral wires is arranged on an envelope of a plurality of protrusions in the insulating frame.

Eleventh means is the second means, wherein the stator has a two-pole coil for each phase, the rotor has four magnetic poles, and the stator has each magnetic pole. An insulating frame for winding a coil around the teeth is attached, and the insulating frame is formed at intervals in the circumferential direction of the stator corresponding to each magnetic pole tooth of the stator. In the case of a two-pole coil having a plurality of protruding portions protruding from an end portion and constituting each phase of the stator, the crossover wire extending from a winding end end of one of the coils is formed by a protrusion of the insulating frame. It is configured to be folded back at the portion and to be connected to the winding start end of the coil of the other pole.

The twelfth means is the eleventh means,
The height from the stator end of the folded portion of the crossover wire in the protrusion of the insulating frame is substantially the same as the height from the stator end of the connection portion between the neutral wires. .

[0025]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 17 are views showing an embodiment of a compressor motor according to the present invention. In addition, in the embodiment of the present invention shown in FIGS. 1 to 17, the same components as those of the general compressor motor shown in FIGS. 18 and 19 are denoted by the same reference numerals.
8 and FIG.

[First Embodiment] First, a first embodiment of the present invention will be described with reference to FIGS. 1 to 8 and FIGS. 18 and 19.

FIGS. 18 and 19 show a stator 1 of a general compressor motor to which the present invention is applied.
The stator 1 includes a plurality of (in this case, six poles) magnetic pole teeth 12 arranged at intervals in the circumferential direction, and these magnetic pole teeth 1.
And a stator core 10 having a yoke core 14 connecting the outer peripheral sides of the stator core 2 and the stator core 10. Each magnetic pole tooth 1 of the stator core 10
2, three-phase star-connected coils 2 are mounted (via insulating frames 3).

Next, FIGS. 1 to 3 show connection diagrams of the compressor motor of the present embodiment. 1 to 3
As shown in FIG. 2 (particularly, FIG. 2), in the stator 1 of the compressor motor according to the present embodiment, the coils 2u to 2w having a total of six poles, two poles for each phase, are connected in parallel in a three-phase star. Have been. As shown in FIG. 4, the compressor motor includes a rotor R having four magnetic poles and arranged coaxially in the stator 1.

Referring again to FIGS. 1 to 3, a pair (two-pole) coils 2u, 2u, 2
v, 2w are provided in the radial direction of the stator 1 (see FIG. 1 or FIG. 3), and a pair of coils 2u, 2v, 2w constituting each phase are connected in parallel, respectively. ing.

The neutral wires 9u and 9w from the U-phase and W-phase coils 2u and 2w respectively correspond to the neutral wire 9v from the V-phase coil 2v among the three phases in the stator 1.
The connections are made at 20 uv and 20 vw for each location.

As shown in FIG. 4, coils 2 u to 2 w are wound directly on the respective magnetic pole teeth 12 of the stator 1 via the insulating frame 3. Further, as shown in FIG. 1 or FIG. 3, a pair of coils (2u, 2u) to
(2w, 2w) is continuously wound. And
A pair of coils (2
u, 2u) to (2w, 2w) are each neutral line 9u.
To 9w.

The neutral wires (crossover wires) 9u to 9w are
The coils 2u to 2w of each phase with respect to the axial direction of the stator 1.
Are arranged on the side opposite to the lead lines 8u to 8w (see FIGS. 1 to 3). That is, the coils 2u to
The lead lines 8u to 8w from 2w are drawn from the side opposite to that shown in FIG. 4 or 5 with respect to the stator 1. In FIG. 3, the stator 1 is viewed from the side where the lead wires 8u to 8w are arranged by indicating the side where the lead wires 8u to 8w are arranged by solid lines and the side where the neutral wires (crossover lines) 9u to 9w are arranged by broken lines. It represents the state where it was put.

Next, the magnetic pole teeth 12 of the stator 1 and the insulating frame 3 attached to the stator 1 will be described in detail. As shown in FIG. 6, each magnetic pole tooth 12 has a main rod portion 12a extending radially inward from the yoke core 14, and an inner peripheral portion 12b formed on the distal end side of the main rod portion 12a. I have. The inner peripheral portion 12b extends on both sides of the main rod portion 12a along the outer periphery of the rotor R (see FIG. 4).

The insulating frame 3 is mounted so as to cover the inner surface of a portion (so-called winding slot) 16 of the stator core 10 substantially surrounded by the yoke core 14 and the magnetic pole teeth 12. That is, the insulating frame 3 includes a hollow web portion 30 that covers the main rod portion 12a of each magnetic pole tooth 12, and an inner peripheral flange portion 31 that covers the outer peripheral portion 12b of each magnetic pole tooth 12.
And an outer peripheral flange portion 32 that covers the inside of the yoke core 14. Then, as shown in FIGS. 4, 8 and 19, each magnetic pole tooth 12 (the main rod 12
The coils 2u to 2w are wound around a).

Next, as shown in FIGS. 4 and 5, the insulating frame 3 corresponds to each magnetic pole tooth 12 of the stator 1.
Has six pairs of protrusions 33 formed at intervals in the circumferential direction. These protruding portions 33 are provided so as to protrude outward from the end portion 1a of the stator 1 (see FIG. 5) from above the outer peripheral flange portion 32 (see FIG. 4).

Then, between the protruding portions 33 (corresponding to the magnetic pole teeth 12 adjacent in the circumferential direction), two neutral wires (9u, 9v) and (9v, 9w) to be connected to each other are to be connected to each other.
And the neutral lines (9u, 9u)
v) and (9v, 9w) are connected to each other 20uv, 2
0vw. In this case, the connection portions 20uv and 20vw between the neutral wires 9u to 9w are respectively arranged corresponding to the boundary portions between the coils 2u and 2v and 2w and 2u adjacent in the circumferential direction.

Here, the connection between the neutral wires 9u to 9w is as follows.
As shown in FIG. 7, this is achieved by using crimp terminals 40.
As shown in FIG. 8, before the connection, the crimp terminal 40 has a substantially U-shaped cross section having an opening 40a, and an uneven portion 40b is formed on the inner surface thereof. Then, the crimp terminal 40 is crimped around the two neutral wires 9u to 9w to be connected as shown in FIG. The coating of the neutral wires 9u to 9w is broken by 40b to make the neutral wires 9u to 9w conductive.

Next, as shown in FIG. 5, a neutral wire holding portion 36 for holding neutral wires 9u to 9w is formed on each projecting portion 33 of the insulating frame 3. Neutral wire holder 36
Is formed by a groove 35 formed on the outer peripheral side of the protruding portion 33 and a pair of protruding portions 34 (see also FIG. 4) protruding from both upper and lower sides of the groove 35 in the outer peripheral direction. Then, as shown in FIGS. 4 and 5, the portions before and after the connection portions 20uv and 20vw in the neutral wires 9u to 9w are particularly
The pair of projections 34 of the neutral wire holding portion 36 reliably hold the neutral wire.

As shown in FIG. 4, each of the neutral wires (crossover wires) 9u to 9w is connected to a plurality of projecting portions 33 on the insulating frame 3.
Along the outer side of the projection 33 to form an envelope of these projections 33. Therefore, the connection portions 20uv and 20vw between the neutral wires are also arranged on the envelope of the plurality of protrusions 33 in the insulating frame 3.

Next, as shown in FIGS. 4 and 5, two-pole coils 2u, 2v, 2w constituting each phase of the stator 1 are formed.
, The neutral wire (crossover wire) 9 extending from the winding end ends 7u, 7v, 7w of the coils 2u, 2v, 2w of one pole
u, 9v, 9w are folded back at the protruding portion 33 of the insulating frame 3 and are connected to the winding start ends 6u, 6v, 6w of the other pole coils 2u, 2v, 2w.

In this case, the height of the folded portions of the neutral wires (crossover wires) 9u to 9w in the projecting portion 33 of the insulating frame 3 from the stator end 1a is equal to the connecting portion 2 of the neutral wires 9u to 9w.
The height from the stator end 1a is 0uv, 20vw (see FIG. 5).

In the present embodiment, the neutral wires 9u and 9w from the U-phase and W-phase coils 2u and 2w are respectively set to 1 with respect to the neutral wire 9v from the V-phase coil 2v in the stator 1. Although the case where connection is made by each part has been described,
The present invention is not limited to this, and the neutral wire from any one of the three phases of the stator 1 is connected to the neutral wire from the other two-phase coils one by one. You just need to connect.

That is, the neutral wires 9v and 9w from the V-phase and W-phase coils 2v and 2w may be connected to the neutral wire 9u from the U-phase coil 2u at one point each. Also, for the neutral wire 9w from the W-phase coil 2w,
Neutral wires 9u, 9v from U-phase and V-phase coils 2u, 2v
May be connected at one place.

Next, the operation and effect of this embodiment having the above configuration will be described. According to the present embodiment, any one of the coils 2u to 2
The neutral points 9u to 9w from the other two-phase coils 2u to 2w are connected to the neutral lines 9u to 9w at one point, respectively. Is formed.

That is, the neutral point is formed by connecting two neutral wires 9u to 9w each at a total of two connecting portions, so that a smaller number of neutral wires than the conventional one are connected. Can form a neutral point. For this reason,
It is possible to provide a compressor motor that can be easily connected to the stator 1 and that is excellent in reliability and low in cost.

In this case, since the connection between the neutral wires 9u to 9w is made by using the crimp terminal 40, the connection can be made extremely easily and reliably as compared with the case of welding or soldering. .

Further, since the neutral wire holding portions 36 for holding the neutral wires 9u to 9w are formed on the respective projecting portions 33 of the insulating frame 3, the neutral wire holding portions 36 allow the neutral wire holding portions 36 to neutralize the neutral wires. The connecting portion between the wires 9u to 9w can be held at a predetermined position with respect to the stator 1 (via the insulating frame 3).

[Second Embodiment] Next, FIGS.
The second embodiment of the present invention will be described with reference to FIG. In the present embodiment, as shown in FIGS. 9 to 11, the neutral wires 9u to 9w are connected to each other by using a press contact terminal 42 fixed to the insulating frame 3 instead of the crimp terminal 40. The third embodiment is different from the first embodiment in that the remaining structure is the same as that of the first embodiment shown in FIGS.

Specifically, as shown in FIGS. 9 to 11, terminal fixing portions 37 corresponding to the connection portions 20uv and 20vw are formed on the insulating frame 3. The terminal fixing portion 37 has a pair of upper and lower holding plate members 38 protruding in the outer peripheral direction of the stator 1, and the pair of holding plate members 38.
The press contact terminals 42 are held between them. The tip portions of the pair of holding plate members 38 have neutral wires 9 u to 9
It is formed in a tapered shape to facilitate insertion of 9w.

As shown in FIGS. 10 and 11, the press contact terminal 42 has a substantially U-shaped cross section having an opening 42a, and a plurality of blade-shaped ribs extending in the cross section on the inner surface side. 42b is formed. And this press contact terminal 4
2 are two neutral wires 9 to be connected from the opening 42a.
by press-fitting the neutral wires 9u to 9w sequentially.
9w is fixed, and the coating of the neutral wires 9u to 9w is broken by the respective blade-shaped ribs 42b, so that the neutral wires 9u to 9w are electrically connected to each other.

Next, the operation and effect of this embodiment having the above configuration will be described. According to the present embodiment, the neutral terminals 9 u to 9 u are connected to the press contact terminal 42 from the opening 42 a thereof.
Since the neutral wires 9u to 9w can be connected to each other simply by press-fitting the 9w, the connection can be made extremely easily and reliably. Further, the terminal fixing portion 37 of the insulating frame 3
The pressure contact terminal 42 is held by the
The connecting portions 20uv and 20vw between u to 9w can be reliably held on the stator 1 (via the insulating frame 3).

[Third Embodiment] Next, FIGS.
3, a third embodiment of the present invention will be described. This embodiment differs from the first embodiment in that a pair of coils 2u, 2v, 2w constituting each phase are connected in series, as shown in FIGS. The other configuration is different from that of the first embodiment shown in FIGS. 1 to 8.

In the case of the present embodiment, as shown in FIGS.
The neutral wires 9u and 9v from the U-phase and V-phase coils 2u and 2v are connected to the neutral wire 9w from the phase coil 2w at 20uw and 20vw ', respectively.

The present embodiment is not limited to the above case, and the neutral wire from any one of the three phase coils in the stator 1 is replaced with the neutral wire from the other two phase coils. What is necessary is just to connect each sex wire at one place. That is, neutral wires 9v and 9w from V-phase and W-phase coils 2v and 2w may be connected to neutral wire 9u from U-phase coil 2u at one point each. U-phase and W-phase coils 2
Neutral wires 9u and 9w from u and 2w may be connected at one point each.

Also in the case of the present embodiment, the neutral wires 9u to 9w from the arbitrary one-phase coils 2u to 2w among the three phases in the stator 1 are replaced with the other two-phase coils 2u to 2w.
The neutral points in the three-phase star connection are formed by connecting the neutral lines 9u to 9w from w at one place, respectively. A neutral point can be formed by connecting the sex wires. For this reason,
It is possible to provide a compressor motor that can be easily connected to the stator 1 and that is excellent in reliability and low in cost.

[Fourth Embodiment] Next, FIGS.
6, a fourth embodiment of the present invention will be described. This embodiment is different from the first embodiment in that neutral wires from the three-phase coils 2u to 2w are connected at one place as shown in FIGS. This is substantially the same as the first embodiment shown in FIGS.

In the case of this embodiment, as shown in FIGS. 14 and 15, two-pole coils (2v, 2
u), (2w, 2v), and (2u, 2w) are continuously wound. In this case, two-pole coils (2v, 2u), (2w, 2v) continuously wound,
Crossover lines between (2u, 2w) are 9vu, 9wv,
Assuming that 9uw, the coils 2u, 2 of each phase of U, V, W
Neutral lines from v and 2w are respectively two crossovers (9vu, 9uw), (9vu, 9wv), (9wv,
9uw).

The connecting wires 9vu, 9wv, and 9uw constituting the neutral wire from the three-phase coils 2u to 2w are 1
They are connected at a location 20uvw. As shown in FIG. 16, the connection between the neutral wires (crossover wires) 9vu, 9wv, and 9uw is performed using the same crimp terminal 40 as shown in FIG.

Next, the operation and effect of this embodiment having the above configuration will be described. According to the present embodiment, 3
By connecting three crossover wires 9vu, 9wv, and 9uw in total at one location, which form a neutral wire from the phase coils 2u to 2w, a neutral point in the three-phase star connection is formed. Neutral lines 9vu, 9wv, 9u with fewer lines than before
A neutral point can be formed by connecting w with each other. For this reason, it is possible to provide a compressor motor that is easy to connect to the stator 1 and that is excellent in reliability and low in cost.

In FIG. 14, the two-pole coils (2v, 2u), (2w, 2v), and (2u, 2w), which are different from each other at a position 300 degrees in the circumferential direction, are continuous. Although the case where the coil is wound is described, the present invention is not limited to this. That is,
Regardless of whether the phases are different from each other or the same phase, any coils may be used as long as they can be continuously wound between any two-pole coils 2u to 2w in the stator 1.

Here, in this embodiment, instead of the connection by the crimp terminal 40 shown in FIG. 16, a connection by a combination of the press contact terminal 45 and the terminal fixing portion 44 as shown in FIG. 17 may be used. In FIG. 17, a terminal fixing portion 44 which is open upward is formed on the insulating frame 3.
This terminal fixing part 44 has three crossovers 9vu, 9wv,
3 pairs of grooves 44a for receiving 9 uw in parallel,
It has three projecting portions 44b abutting on the lower sides of the crossovers 9vu, 9wv, 9uw.

The press contact terminal 45 has three grooves (openings) 45 a corresponding to the grooves 44 a of the terminal fixing part 44. In this case, by pressing the crimp terminal 45 into the terminal fixing portion 44, each groove 45 of the press contact terminal 45 is pressed.
The crossover wires 9vu, 9wv, 9uw are press-fitted into a, and the coating of the crossover wires 9vu, 9wv, 9uw is broken to conduct the neutral wires.

In the above embodiment, a case has been described in which the coils 2u to 2w (and the magnetic pole teeth 12) having a total of 6 poles of 2 poles are provided for each phase. 3u or more coil 9u or more 2u ~ 2
The present invention can be applied to a case where w (and the magnetic pole teeth 12) are provided.

In the stator 1, an integral stator core 10 in which the yoke core 14 and the magnetic pole teeth 12 are integrated
Has been described, but a split-type stator core in which the yoke core 14 and the magnetic pole teeth 12 are assembled separately from each other may be used.

In this specification, the term “crimp terminal” refers to a terminal member that connects wires by relatively large deformation of the terminal itself due to caulking or the like. It refers to a terminal member that connects wires with almost no deformation of the terminal itself by press-fitting.

[0066]

According to the present invention, a neutral point in a three-phase star connection is formed by connecting two or three neutral wires to each other. The neutral point can be formed by the connection. For this reason, it is possible to provide a compressor motor that is easy to connect to the stator, has excellent reliability, and is low in cost.

[Brief description of the drawings]

FIG. 1 is a connection diagram including a stator core in a first embodiment of a compressor motor according to the present invention.

FIG. 2 is a schematic connection diagram showing a simplified connection diagram shown in FIG. 1;

FIG. 3 is a connection diagram including a winding direction and the like of the compressor motor shown in FIG. 1;

FIG. 4 is a plan view of the compressor motor shown in FIG. 1 as viewed from a neutral wire arrangement side.

FIG. 5 is a partial elevational view showing a neutral wire arrangement side of the compressor motor shown in FIG. 1;

FIG. 6 is a diagram showing the shapes of magnetic pole teeth and an insulating frame of the compressor electric motor shown in FIG. 1 in a cross section of a stator core.

FIG. 7 is a diagram showing a connection state between neutral wires in a cross section taken along line XX of FIG. 5;

FIG. 8 is a perspective view of the crimp terminal shown in FIG. 7;

FIG. 9 is a partial plan view of a stator for illustrating a terminal fixing portion of an insulating frame in a second embodiment of the compressor motor according to the present invention.

FIG. 10 is an enlarged view of a terminal fixing portion of the insulating frame in FIG.

FIG. 11 is a sectional view taken along line ZZ of FIG. 10;

FIG. 12 is a connection diagram including a stator core in a third embodiment of the compressor motor according to the present invention.

FIG. 13 is a schematic connection diagram showing a simplified connection diagram shown in FIG.

FIG. 14 is a connection diagram including a stator core, a winding direction, and the like in a fourth embodiment of the compressor motor according to the present invention.

FIG. 15 is a schematic connection diagram showing a simplified connection diagram shown in FIG. 14;

FIG. 16 is a sectional view of the compressor motor shown in FIG. 14;
The figure similar to FIG. 7 which shows the connection state at the time of using the crimp terminal shown in FIG.

FIG. 17 is a perspective view showing another example of a connection portion between neutral wires in the compressor motor shown in FIG. 14;

FIG. 18 is a plan view showing a stator of a general compressor motor to which the present invention is applied.

19 is a longitudinal sectional view of a stator of the compressor electric motor shown in FIG.

FIG. 20 is a connection diagram including a stator core in a conventional compressor motor.

[Explanation of symbols]

 R Rotor 1 Stator 10 Stator iron core 12 Magnetic pole teeth 14 Yoke iron core 2u to 2w Coil 3 Insulating frame 33 Protruding part 36 Neutral wire holding part 37,44 Terminal fixing part 6u to 6w Winding start end 7u to 7w Winding end End 8u-8w Lead wire 9u-9w Neutral wire (crossover wire) 9vu, 9wv, 9uw Neutral wire (crossover wire) 20uv, 20vw Connection portion 20vw ', 20uw Connection portion 20uvw Connection portion 40 Crimping terminal 42, 45 Pressure contact terminal

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiaki Inaba, 336 Tatehara, Fuji, Shizuoka Prefecture, Toshiba Fuji Plant (72) Inventor Katsumi Fukagawa, 336 Tatehara, Fuji City, Shizuoka Prefecture, Toshiba Fuji Plant ( 72) Inventor Kazuki Imazawa 336 Tatehara, Fuji-shi, Shizuoka Prefecture F-term in Toshiba Fuji Factory (reference) CC05 CC15 CC16 QA01 QA04 QB01 QB03 QB12

Claims (12)

[Claims] 1. A stator comprising a rotor and a stator, the stator having a plurality of circumferentially spaced magnetic pole teeth and a three-phase star connection with respect to the magnetic pole teeth. The coil is directly wound, and the neutral wire from any one of the three phases of the stator is connected to the neutral wire from the other two-phase coils at one point each. An electric motor for a compressor, comprising: 2. The stator according to claim 1, wherein each phase of the stator comprises a plurality of pole coils connected in parallel to each other, and the plurality of pole coils are continuously wound, and a crossover wire between the plurality of pole coils is provided. 2. The electric motor for a compressor according to claim 1, wherein 3. A stator, comprising: a rotor and a stator, the stator having a plurality of circumferentially spaced magnetic pole teeth, and a three-phase star connection with respect to the magnetic pole teeth. A coil is directly wound, and each phase of the stator is constituted by a multi-pole coil connected in parallel with each other, and continuously wound between arbitrary multi-pole coils in the stator, An electric motor for a compressor, wherein the crossover wires between the coils of the plurality of poles are neutral wires from the coils of each phase, and the neutral wires from the three-phase coils are connected at one place. 4. The apparatus according to claim 1, wherein the neutral wire of each phase is arranged on the opposite side to the lead wire from the coil of each phase with respect to the stator. An electric motor for a compressor as described in the above. 5. The electric motor for a compressor according to claim 1, wherein the connection between the neutral wires is made by using a crimp terminal or a press contact terminal. 6. An insulating frame for winding a coil around each magnetic pole tooth is attached to the stator, and a terminal fixing portion for holding a press-contact terminal having an opening is formed on the insulating frame. 4. The compressor according to claim 1, wherein the connection between the neutral wires is performed by press-fitting the neutral wire into the press contact terminal from an opening thereof. 5. Electric motor. 7. An insulating frame for winding a coil around each magnetic pole tooth is attached to the stator, and a neutral for holding a portion before and after a connection portion of the neutral wire on the insulating frame. The electric motor for a compressor according to any one of claims 1 to 3, wherein a line holding portion is formed. 8. An insulating frame for winding a coil around each magnetic pole tooth is attached to the stator, and the insulating frame is arranged in a circumferential direction of the stator corresponding to each magnetic pole tooth of the stator. It has a plurality of protrusions formed at intervals and protruding from an end of the stator, and between the adjacent protrusions, the neutral wires to be connected to each other are arranged and arranged. 4. The electric motor for a compressor according to claim 1, wherein the neutral wires are connected by crimp terminals. 9. The electric motor for a compressor according to claim 8, wherein the connection portions of the neutral wires are arranged corresponding to the boundary portions of the coils adjacent in the circumferential direction. 10. The electric motor for a compressor according to claim 8, wherein the connection portions of said neutral wires are arranged on an envelope of a plurality of projecting portions of said insulating frame. 11. The stator has a two-pole coil for each phase, the rotor has four magnetic poles, and the stator has an insulation for winding a coil around each magnetic pole tooth. A frame is attached, and the insulating frame includes a plurality of protrusions formed at intervals in a circumferential direction of the stator corresponding to respective magnetic pole teeth of the stator and projecting from an end of the stator. In the two-pole coil constituting each phase of the stator, the crossover wire extending from the winding end of the one-pole coil is folded back at the protrusion of the insulating frame, and the other pole is connected to the other pole. The motor for a compressor according to claim 2, wherein the motor is configured to be connected to a winding start end of the coil. 12. The height of the folded portion of the crossover wire from the end of the stator at the protruding portion of the insulating frame is substantially the same as the height of the connection portion between the neutral wires from the end of the stator. The motor for a compressor according to claim 12, wherein