JP2001275288A - Stator of motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the stator of a motor, in which the connecting and wiring at the coil end parts and the process of insulation processing are facilitated and the size of the stator is reduced. SOLUTION: Conductors arranged in the stator are divided into conductors arranged in the slots at the body of the stator and conductors for connecting the conductors arranged in the slots in star. The former are realized by rod conductors and the latter are realized by arranging stator end plates A, B and a neutral connecting pipe thus reducing the size and cost of the stator of a motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor stator.

[0002]

2. Description of the Related Art Recently, interest in resource saving and energy saving has been increasing. There is a demand for further downsizing and higher efficiency of motors, and the development for them is proceeding. Also, efforts are being made to reduce costs by reducing the number of parts and the number of assembly steps.

[0003] The structure of a motor is roughly divided into a stator, a rotor, and a detector depending on the type of the motor. As a conventional motor stator winding, for example, an iron core piece wound around a bobbin with a conductive wire is used. Are generally arranged in a ring by using a plurality of the conductors, or a configuration in which a plurality of conductors wound in a ring in advance are sequentially inserted into slots of an integral stator core.

An example of a conventional stator will be described with reference to FIGS. FIG. 9 is a connection diagram showing an example in which the stator windings are connected in a two-star (2Y) system, and FIG. 10 is a layout diagram of the stator windings, and the windings of each phase are outer windings formed at a pitch of 120 °. It is composed of a wire 102A and an inner winding 102B formed at a 120 ° pitch shifted from the outer winding 102A by 180 °. FIG. 11 is an external view of a conventional stator formed as described above.

In the drawing, reference numeral 101 denotes a stator main body. The ends of the lead wires protruding from the winding formed by a conventional method are connected to the ends of a lead wire, a neutral point, etc. according to the respective purposes. The insulating tubes 108 and 104B were inserted as shown in FIG. Thereafter, a plurality of lead wires are appropriately connected. In FIG. 11, for example, the lead wiring 106 is routed on the upper surface of the winding 102 to the lead wire 104, and another neutral point wiring 107 is routed on the upper surface of the winding 102 to the neutral point connection portion 121A or 121B. And are electrically connected at their ends. Then, the neutral point connection part 121A or 12A
1B, the neutral-point insulating tube 108 is inserted, and three lead-wires 104 for three phases are put together and the lead-wire collecting tube 104A is inserted. Wiring and connection parts were bound and fixed.

[0006]

However, with respect to the conventional motor stator, the steps of inserting the conductor into the slot and connecting each phase are complicated, requiring the skill of the operator and the number of parts. -Reduction of man-hours could not be realized sufficiently. At the same time, a large space is generated at the coil end due to connection, insulation, and treatment of the binding thread on the stator of the motor, so that the stator cannot be downsized.

Further, in the case where the divided stator cores are arranged in a ring shape, it is difficult to join the divided pieces in a ring shape while ensuring assembly accuracy.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a motor stator in which the size of the motor stator is reduced and the cost is reduced.

[0009]

According to the present invention, there is provided a first conductor comprising a plurality of conductors disposed in slots of a stator main body, wherein the first conductor comprises a coil-shaped conductor disposed on a stator. Part, and divided into a second and a third conductor part comprising a plurality of conductors arranged at both ends of the first conductor part,
In addition, the present invention is a motor stator in which the first and second conductors are connected to form a star connection using the second and third conductors. By arranging the first, second, and third conductors on the stator, the stator of the motor can be reduced in size and cost can be reduced.

[0010]

DETAILED DESCRIPTION OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a coil-shaped conductor arranged on a stator, comprising a plurality of conductors formed of a wire or a rod arranged in slots of a stator body. A first conductor portion and a plurality of second and third conductor portions disposed at both ends of the first conductor portion, and the second and third conductor portions are formed. And a motor stator connected so that the first conductor portion is connected in a star connection by using a portion.

Further, according to the present invention, the coil-shaped conductor arranged in the slot of the stator main body may have a different length for each phase in which the first conductor composed of a plurality of wire or rod-shaped conductors forms each phase. And a plurality of stator end plates having a second and third conductor portions, each of which is disposed at both ends of the first conductor portion, and a neutral point connection portion, and the neutral point connection portion. A motor stator in which the first conductors are connected so as to form a star connection by using a neutral point connection pipe that connects the motors to each other.

Further, according to the present invention, the coil-shaped conductor arranged in the slot of the stator body has a different length for each phase in which the first conductor composed of a plurality of wire or rod-shaped conductors forms each phase. A plurality of stator end plates each having a color, a plurality of stator end plates having a plurality of conductors disposed at both ends of the first conductor portion, and a plurality of stator end plates having a neutral point connection portion; A motor stator in which the first conductors are connected in a star connection using a neutral point connection pipe connecting the parts.

The present invention also provides a stator main body in which an independent insulating rod conductor and an insulator are inserted in all slots, a stator end plate A in which the rod conductor is molded with an insulator, and a rod conductor. And a stator provided with a stator end plate B having a neutral point connection portion on an inner peripheral surface and a lead wire connection portion on an outer peripheral surface or an end surface portion, and a neutral point connection pipe. At one end of the bar conductor of the stator body, three stator end plates B are laminated in the axial direction, and at the same time, each stator end plate B is circumferentially machined at a mechanical angle of 120 / P (P: number of pole pairs). The neutral point connection pipe is disposed on the inner surface of the stator end plate B, and three stator end plates A are laminated in the axial direction on one end of the stator body opposite to the bar conductor. At the same time, the stator end plates A are circumferentially shifted by a machine angle of 120 / P in the circumferential direction, Wherein the bar conductor of the body stator end plate A,
It is a motor stator connected so that the connection state of the bar conductors of B is a star connection.

Further, the stator of the motor is a motor having any one of the above configurations.

As described above, in the stator of the motor, the conductor arranged on the stator is divided into the conductor arranged in the slot of the stator body and the conductor connecting the conductor so as to form a star connection. Then, when connecting and wiring the windings of the stator, processes such as insulation treatment and winding fixing can be simplified.

The conductors arranged in the slots of the motor stator body have different lengths and colors for each phase forming each phase, and a conductor for connecting the conductors in a star connection and a neutral point connection portion are provided. A motor stator comprising a plurality of stator end plates and a neutral point connection pipe for connecting the neutral point connection portions to each other facilitates connection at the time of phase connection, eliminates connection errors, and performs insulation treatment and winding. Steps such as wire fixing can be simplified.

Further, a stator main body in which an independent rod conductor with an insulating film and an insulator are inserted into all the slots, a stator end plate A in which the rod conductor is molded with an insulator, and a rod conductor formed of an insulator. To form a neutral point connection on the inner peripheral surface,
A stator end plate B provided with a lead wire connection portion on an outer peripheral surface or an end surface portion and a stator provided with a neutral point connection pipe, wherein the stator end plate B is attached to one end of a bar conductor of the stator body portion. Three layers are laminated in the axial direction, and the respective stator end plates B are simultaneously shifted in the circumferential direction by a mechanical angle of 120 / P (P: the number of pole pairs), and the neutral point is connected to the inner surface of the stator end plate B. A tube is disposed, and three stator end plates A are laminated in the axial direction on one end of the stator body opposite to the bar conductor, and at the same time, each stator end plate A is circumferentially mounted at a mechanical angle of 120 /. The stator of the motor is shifted by P, and the connection between the bar conductor of the stator body and the bar conductors of the stator end plates A and B is connected in a star connection. Also, reduction of complicated processes such as insulation processing during coil end molding and wiring work, and the number of parts Reduction is possible. At the same time, the space factor of the conductor can be increased, and the size of the stator of the motor can be reduced.

Further, in the motor in which the stator of the motor has any one of the above-described configurations, it is possible to reduce the size and cost of the entire motor.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Embodiment 1) FIG. 1 shows a motor stator according to a first embodiment of the present invention. This stator is a three-phase three-pole motor stator, for example, has 27 slots, and has one and two turns. This means that in the phase U1 in the connection diagram of FIG. 6, the number of turns between the turns is 1 turn, and the number of turns between the turns is 2 turns. The numbers such as,, and indicate the slot numbers of the stator in FIG.

The details will be described below with reference to FIGS.

In the figure, reference numeral 1 denotes a stator main body in which an insulated rod conductor 2 is disposed in a slot of an iron core in which silicon steel sheets punched into a predetermined shape are laminated, and the inside of the stator slot and the rod conductor are arranged. Is filled with a low-viscosity resin and cured. As shown in FIG. 2, the rod conductor 2 has a shape corresponding to the shape of the slot, not the column shape of the slot portion of the stator. In the figure, L1 is the same as the slot length of the stator,
L2 to L7 are portions where the length of the bar conductor is different for each phase, and the length is L2, L3, L4 on one side.
, And on the other side, L5, L6, L
7 in the order of length. L2 and L
5, L3 and L6 and L4 and L7 form a pair. 4 is an insulating film. Reference numeral 5 denotes a stator end plate A, which is obtained by molding an insulated conductor 10 with a resin. 6 is a stator end plate B,
The insulated conductor 9 is molded with resin, and a lead wire connection point 14 and a neutral point connection point 12 are provided. As shown in FIG. 3B, a ring 11 made of iron, copper, or the like is molded on each of the stator end plates A and B at a location where the stator end plates A and B are connected to the bar conductor 2 of the stator body 1. The stator end plate A of No. 5 is laminated and used like 3a, 5b and 5c, and the stator end plate B of 6 is laminated and used like 6a, 6b and 6c. The stator end plates A, 5 are provided at predetermined positions of the stator body 1.
a, and soldering is performed.
Are inserted into the stator end plates A and 5a while being shifted by 40 ° in the same circumferential direction, and a soldering process is performed.
Thereafter, the stator end plates B, 6a, 6b, 6c
And work in the same manner as the stator end plate A. Next, the neutral point connection pipe 7 is inserted into the inner surface of the stator end plate B, and is fixed so as to be electrically connected to the neutral point connection portion 12 of the stator end plate B 6a, 6b, 6c. I do.

FIG. 3 is a cross-sectional view of the stator end plate B.
One end of the bar conductor is inserted into a hole such as h or i. FIG. 4 is a cross-sectional view of the stator main body, and a, b, c, etc. indicate rod conductors. FIG. 5 is a cross-sectional view of the stator end plate A, d,
One end of the bar conductor is inserted into holes e, f, etc.

In the soldering, if the surface of the rod conductor and the inner peripheral surface of the ring molded on the stator end plate are coated with solder, the connection work becomes easy.

The connection in the stator is performed as follows.

The connection sequence of the U1 phase of the U phase in FIG. 6 will be checked. The rod conductor forming the U1 phase is L1 as shown in FIG.
This rod conductor has a length of L2, L5, and is connected to the stator end plate A 5a and the stator end plate B 6a.
The circled numbers in FIG. 6 correspond to the stator slot numbers as described above. The same applies to FIGS. 3 to 5. The symbols a to i in FIGS. 3 to 5 are symbols from inside to outside in each drawing. For example, a indicates the innermost conductor of the stator slot. More specifically, FIG. 3 is a cross-sectional view of a stator end plate B in which one end of a bar conductor is inserted into holes such as g, h, and i, and FIG. 4 is a cross-sectional view of a stator body. , B,
c and the like indicate rod conductors. FIG. 5 is a cross-sectional view of the stator end plate A. One end of the bar conductor is inserted into holes d, e, f and the like.

The connection of the U1 phase is as follows when viewed from the neutral point.

Neutral point 13 (shown in FIG. 6) → g (FIG. 3) -a (FIG. 4) -df (FIG. 5) -c (FIG. 4) -ih (FIG. 3) -b ( (Fig. 4) -ed
(FIG. 5) -a (FIG. 4) -gg (FIG. 3) -a
(FIG. 4) -de (FIG. 5) -b (FIG. 4) h-
i (FIG. 3) -c (FIG. 4) -ff (FIG. 5) -c
(FIG. 4) -i (FIG. 3) → U phase (illustrated in FIG. 6) Similarly, U2 and U3 phases are formed. After the U phase is formed, the V phase and the W phase are formed in order.

The lead wires are connected to fourteen lead wire connections.

By adopting a connection end plate at the rod end of the rod conductor 2 and the stator, the occurrence of swelling of the coil end is eliminated, and the conventional step of forming the coil end becomes unnecessary, and the space factor of the conductor is eliminated. And workability can be greatly improved.

Although the description has been made on one turn and two turns, the present invention is not limited to these values.

(Embodiment 2) FIG. 8 shows a bar conductor according to a second embodiment of the present invention.

In the figure, reference numeral 16 denotes the same shape as in the first embodiment, but reference numeral 8 denotes an insulating material such as resin. A cylindrical conductor penetrates through the insulating material. Other configurations are the same as those of the first embodiment. The dielectric strength is improved, and the rod conductor is simply cylindrical, so that the production is easy.

(Embodiment 3) The rod conductor in the third embodiment of the present invention is substantially U-shaped. Although not shown, a conductor portion formed by molding the stator end plate A or B is formed on one side of the bar conductor.

It is the same as the connection on one side at the beginning, and at the same time, the portion corresponding to the coil end can be freely formed, so that the space for the coil end can be reduced and the stator can be downsized.

[0036]

As is apparent from the above embodiment, according to the first, second, third and fourth aspects of the present invention, it is possible to reduce the size of the motor stator and reduce the cost by reducing the number of parts and man-hours. Become.

According to the fifth aspect of the present invention, it is possible to reduce the size and cost of the entire motor.

[Brief description of the drawings]

FIG. 1 is a diagram showing the structure of a motor stator according to an embodiment of the present invention.

2A is a perspective view of a rod conductor according to the first embodiment of the present invention. FIG. 2B is a view taken in the direction of arrow A in FIG. 1 according to the first embodiment of the present invention. FIG. 2 (a) is a view taken along the arrow B in the example.

3A is a cross-sectional view of a stator end plate B according to an embodiment of the present invention. FIG. 3B is an XY vertical cross-sectional view of FIG. 3A according to an embodiment of the present invention. FIG.

FIG. 4 is a cross-sectional view of a stator body according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of the stator end plate A according to the embodiment of the present invention.

FIG. 6 is a connection diagram of a stator winding according to the first embodiment of the present invention.

FIG. 7 (a) is a front view showing the structure of a neutral point connection pipe in the embodiment of the present invention.

8 (a) is a perspective view of a rod conductor according to a second embodiment of the present invention. FIG. 8 (b) is a view taken in the direction of arrow A in FIG. 8 (a) according to a second embodiment of the present invention. FIG. 8A is a view taken in the direction of the arrow B in the second embodiment.

FIG. 9 is a connection diagram of a stator winding in a conventional example.

FIG. 10 is a layout diagram of a stator winding in a conventional example.

11A is an external view of a stator according to a conventional example. FIG. 11B is an enlarged sectional view of a portion A in FIG. 11A.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator main body part 2, 3 Rod conductor in 1st Example 4 Insulating film 5 Stator end plate A 6 Stator end plate B 7 Neutral point connection pipe 8 Insulation material 9, 10 Conductor 12 Neutral point connection point DESCRIPTION OF SYMBOLS 13 Neutral point 14 Lead wire connection part 15 Resin 16 Bar conductor in the second embodiment 101 Conventional stator core 102 Winding in conventional stator 104 Lead wire of conventional stator 104A Lead wire combining tube 104B Lead wire Insulation tube 105 Tightening thread 106 Lead wire with insulation tube 107 Neutral point wiring with insulation tube 108 Insulation tubes for neutral point 121A, 121B Neutral point connection

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H603 AA09 BB01 BB07 BB12 CA01 CA05 CB05 CB23 CB24 CC04 CC11 CC17 CD02 CD05 CD34 FA02 FA06 5H604 AA08 BB01 BB14 CC01 CC05 CC14 CC16 DB24 PC01 PC05 QA05

Claims (5)

[Claims] 1. A coil-shaped conductor arranged on a stator,
A first conductor portion composed of a plurality of conductors in the form of a wire or a bar arranged in a slot of the stator body, and second and third conductors composed of a plurality of conductors disposed at both ends of the first conductor portion And a motor stator connected to the first conductor using the second and third conductors so as to form a star connection. 2. A first conductor portion composed of a plurality of conductors in the form of a wire or a bar arranged in a slot of a stator body portion has a different length for each phase forming each phase, and A plurality of stator end plates having second and third conductor portions each having a plurality of conductors disposed at both ends and a neutral point connection portion, and a neutral point connection pipe connecting the neutral point connection portions to each other. make use of,
The motor stator according to claim 1, wherein the first conductors are connected so as to form a star connection. 3. A first conductor portion composed of a plurality of conductors in the form of a wire or a bar arranged in a slot of a stator main body portion has a different length and color for each phase forming each phase, and A plurality of stator end plates having second and third conductor portions, each of which includes a plurality of conductors disposed at both ends thereof, and a neutral point connection portion, and a neutral point connection pipe connecting the neutral point connection portions to each other. 2. The motor stator according to claim 1, wherein the first conductors are connected so as to form a star connection. 4. A stator main body in which an independent rod conductor with an insulating film and an insulator are inserted inside all slots, respectively.
A stator end plate A in which a bar conductor is molded with an insulator, and a stator in which a bar conductor is molded with an insulator and a neutral point connection portion is provided on an inner peripheral surface and a lead wire connection portion is provided on an outer peripheral surface or an end surface portion. End plate B
And a stator provided with a neutral point connection pipe, wherein three stator end plates B are axially laminated on one end of the bar conductor of the stator body, and each stator end plate B The neutral point connection pipe is disposed on the inner surface of the stator end plate B at a mechanical angle of 120 / P (P: the number of pole pairs) in the direction, and the stator body is opposite to the bar conductor. At one end, three stator end plates A are laminated in the axial direction, and at the same time, the stator end plates A are each shifted by a mechanical angle of 120 / P in the circumferential direction, and the rod conductor of the stator main body and the stator end are shifted. A motor stator coupled so that the connection state of the bar conductors of the plates A and B is a star connection. 5. The motor according to claim 1, wherein the stator of the motor has any one of the above structures.