JP2001298919A - Method of manufacturing motor stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing parallel star connection which needs much manhour and material cost and is a deadlock of cost reduction, with little manhour and material. SOLUTION: In the parallel star connection, 2n-number (n is a natural number) of unit coil which constitute magnetic poles of plural phases are star- connected. As to the 2n-number of unit coil, different phase coils or same phase coils are continuously wound in sequence via power source terminals and a neutral point terminal by using single winding conductor. Consequently, parallel star connection can be manufactured by using the lowest manhour for mutual connection of coils and the minimum wiring material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an electric motor stator in which coils are formed by concentrated winding of salient poles around each magnetic pole tooth.

[0002]

2. Description of the Related Art In general, a concentrated winding of a motor stator is formed by winding a conductive wire around each magnetic pole tooth via a nozzle. Winding to multiple phases is performed by a single nozzle.
A method of continuously winding coils of the same phase and sequentially winding other phases, or a nozzle for a plurality of phases as shown in FIG.
A method of simultaneously and continuously winding coils of each phase is used. FIG. 9 shows an example of a winding pattern of the serial star connection, and FIG. 10 shows a serial star connection diagram. For connection of coils of each phase, a method is used in which both terminal wires of coils continuous in each phase are deposited and connected to dedicated terminals, and a neutral terminal is often shared. Further, in the parallel star connection as in the example shown in FIG. 11, since each phase and each coil are connected independently in parallel, the coils are not wound continuously, but are wound independently. As shown in FIG. 12, a method of performing post-connection work, depositing each coil in each terminal, adding a connection end plate, and performing connection processing is adopted.

[0003] In order to improve the winding property and increase the space factor of the winding in the slot, a split core method of splitting and winding a core has been widely adopted. Since continuous winding is not possible,
No. 196 discloses a continuous winding method using a thin-walled continuous core, and Japanese Patent Application Laid-Open No. 10-336934 discloses a continuous winding method using a connecting jig. Further, as a parallel star connection method in the split core method, a continuous winding method using a winding wiring board disclosed in JP-A-9-191588, and a continuous winding method for each unit core disclosed in JP-A-10-336934. A construction method is disclosed. Basically, parallel windings are used in which the multiple phases are independent from each other, and a neutral point connection process between the multiple phases is performed after the winding.

[0004]

In the above-mentioned conventional method of manufacturing a motor stator in which coils are formed by concentrated winding of salient poles on each magnetic pole tooth, parallel star connection is performed after winding. In addition, separate parts such as connection work or connection end plates are required, leading to an increase in man-hours and material costs. As a result, cost reduction was difficult. Furthermore, in the parallel star connection in the split core method, complicated neutral point connection processing between a plurality of phases is required after winding, and it is difficult to reduce the number of manufacturing steps.

An object of the present invention is to provide a manufacturing method capable of manufacturing parallel star connection with a small number of man-hours and materials.

[0006]

In order to solve this problem, the present invention provides a 2n (n is a natural number) unit coil unit (each phase is wound around one tooth) constituting a plurality of phases of magnetic poles. Parallel star connection in which the connection of adjacent coils is a unit coil unit), or star connection in 2 km (k, m are natural numbers and k ≧ 2) constituting a plurality of magnetic poles, respectively. The 2n unit coil units are composed of a single winding conductor, or the 2km unit coil units are composed of k winding conductors, via a power supply terminal and a neutral point terminal. In this case, different-phase or in-phase coils are sequentially and continuously wound.

As a result, it is possible to manufacture a parallel star connection with a minimum number of connection steps between coils and a minimum connection material.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a stator core comprising a plurality of teeth and a yoke connecting the teeth, wherein a slot for accommodating a winding is provided between adjacent teeth. In the method for manufacturing a motor stator having an opening (slot open) on a side opposite to the yoke side of the slot and winding the teeth on the teeth, 2n magnetic poles constituting a multi-phase magnetic pole ( n is a natural number) unit coil units (each coil of each phase is an adjacent coil wound on one tooth is defined as a unit coil unit). A method for manufacturing a motor stator, comprising successively and sequentially winding different-phase or in-phase coils through a power supply terminal and a neutral point terminal, wherein two unit coil units are used as a base unit. The single winding conductors, base unit all n coils, without the need for connecting work in the post process, has the effect of being windings in succession.

According to a second aspect of the present invention, in the stator core, a plurality of core segments each including one tooth are connected by a yoke portion, and each tooth is substantially parallel. It is configured as a core segment series body,
2. The method for manufacturing a motor stator according to claim 1, wherein after the winding is applied, the core segment series body is rolled into an annular body to form a motor stator. With the unit as the base unit, the single winding conductor has an effect that all the coils of the n base units are continuously wound without the necessity of a connection operation in a later process.

According to a third aspect of the present invention, there is provided a stator core comprising a plurality of teeth and a yoke connecting the teeth, the stator core having a slot for accommodating a winding between adjacent teeth. In the method for manufacturing a motor stator having an opening (slot open) on the side opposite to the yoke side of the slot and winding the teeth on the teeth, 2km pieces (k, m: Natural number and k ≧ 2)
The connection of the unit coil units (the adjacent coils wound around one tooth for each phase is referred to as a unit coil unit) is star-connected to the parallel star connection, k
After successively winding different-phase or in-phase coils in sequence through a power supply terminal and a neutral point terminal, the k
A method for manufacturing a motor stator, comprising connecting two power supply terminals to each other, wherein two coil units are used as a base unit, and all coils of m base units are formed by a single winding conductor. However, there is an effect that winding can be performed continuously without the necessity of a connection operation in a later process, and k winding conductors can be simultaneously wound.

According to a fourth aspect of the present invention, the stator core is divided into k unit cores each composed of 2 m unit coil units. 4. A method for manufacturing a motor stator according to claim 3, wherein the motor stator is formed by connecting two unit coil units as a base unit and a single winding conductor. All the coils of the m units are continuously wound without the necessity of a connection operation in a later step, and have an effect that k winding conductors can be simultaneously wound.

According to a fifth aspect of the present invention, the unit core is divided into core segments each including one tooth, and a plurality of the core segments are connected by a yoke portion. It is configured as a core segment series body that is substantially parallel, and after applying a winding, it is rounded in an arc shape, and the k unit cores with the winding are connected, or the winding is applied. Core segment series
The method for manufacturing a motor stator according to claim 4, wherein the motor stator is formed by connecting the individual pieces and rolling them into an annular body to form a single motor stator. With the winding conductor, it is possible to continuously wind all m coils of the basic unit without the need for connection work in a later process, and to simultaneously wind k winding conductors. Has an action.

Hereinafter, embodiments of the present invention will be described.
This will be described with reference to FIGS.

(Embodiment 1) FIG. 1 is a winding pattern diagram showing an embodiment of the present invention in parallel star connection in a 12-slot three-phase brushless motor, and FIG. 2 is a connection diagram. In FIG. 2, 231, 232, 233, 23
Reference numeral 4 denotes a unit coil unit to be star-connected, which is a parallel star connection composed of two basic units 241 and 242 each composed of the two unit coil units. Reference numerals 191, 192, 193, and 194 are neutral point terminals of each unit coil unit. 18U, 18V, 18
W indicates a power supply terminal of each phase. In FIG. 1, the V-phase first coil 20V1 is wound around the neutral point terminal 191 by a single winding conductor 22, and the connecting wire 2 is connected to the power terminal 18V.
1, the V-phase second coil 20V2 is wound therearound, and after being wired to the neutral terminal 192 by the crossover 21, W
After winding the second phase coil 20W2 and wiring it to the power supply terminal 18W with the crossover 21 and then winding the W phase first coil 20W1 and wiring it to the neutral terminal 191 with the crossover 21 , The U-phase first coil 20U1 is wound, and the power terminal 18
After being wired to the U by the crossover 21, the U-phase second coil 20
The winding of the base unit 241 is completed by winding the U2 and wiring the neutral point terminal 192 with the crossover 21. Continuously, the same winding conductor is connected to the neutral point terminal 193 by the connecting wire 21, and then the winding of the V-phase third coil 20 V3 is started, and the basic unit 2
By repeating the same process as the winding 41, the parallel star connection in the 12-slot three-phase brushless motor composed of the basic units 241 and 242 is changed to the single winding conductor 2
2 enables continuous winding.

The power supply terminal and the neutral point terminal, which are likely to be overlapped, are installed at different positions by using two coil ends of the stator. By arranging the neutral point terminal group in the coil end portion, each terminal can be installed at an optimum location.

The connection between each terminal and the connecting wire or terminal wire deposited in the terminal can be easily automated by an existing method such as fusing or soldering.

(Embodiment 2) FIG. 3 shows a state after winding in a split core method of a 12-slot three-phase brushless motor, in which a core segment 11 composed of a tooth 12 and a yoke 13 is A part of the yoke 13 is connected to form a core segment serial body 14. By subjecting the core segment series body 14 to the same winding process as in the above (Embodiment 1), the parallel star connection of the divided cores is continuously increased in density by a single winding conductor 22. Is possible. After winding, the core segment series body 14 is rolled into an annular body, and integrated to be manufactured as a completed stator.

(Embodiment 3) FIG. 4 is a winding pattern diagram showing another embodiment of the present invention in a parallel star connection in a 12-slot three-phase brushless motor, and FIG. 5 is a connection diagram. In FIG. 5, 231, 232, 233,
A unit coil unit 234 is star-connected, and is a parallel star connection composed of two basic units 241 and 242 each composed of the two unit coil units. Reference numerals 191, 192, 193, and 194 are neutral point terminals of each unit coil unit. 181U, 181
V, 181W, 182U, 182V, 182W indicate power terminals of each phase in the basic units 241, 242, respectively. By the two winding conductors 221 and 222,
By performing the process for one base unit in the above (Embodiment 1) on each of the base units 241 and 242, winding can be continuously performed on the base units. In addition, by simultaneously winding two basic units with two winding conductors, the number of winding steps can be reduced by half.

It is to be noted that the winding process is divided into two, and one basic unit is wound in one process as one winding conductor in one winding process, so that the weight and speed of the winding equipment can be reduced. It is also possible to speed up the manufacturing process.

The basic units 241 and 241 are respectively provided.
By providing a temporary deposit section instead of the power supply terminal of each phase in 242, in the winding step, winding is continuously performed while depositing in the temporary deposit section, and in a later connection processing step, a power supply common to each basic unit is provided. It is also possible to provide a terminal and store it again, thereby reducing material costs of the terminal and the short-circuit member.

(Embodiment 4) FIG. 6 shows an embodiment after winding of a unit core in parallel star connection in a 12-slot three-phase brushless motor. Basic units 241 and 24 each composed of two unit coil units
2 have the power supply terminal and the neutral point terminal shown in the above (Embodiment 3), and have unit cores 151 and 152 respectively.
Has been split as The unit cores 151 and 152 are subjected to the process for one basic unit of the above (Embodiment 1) by each unit core alone, so that the unit cores 151 and 152 are continuously wound in an independent state. Lines are possible. After the completion of the winding, the unit cores 151 and 152 are connected and integrated to be manufactured as a completed stator. By reducing the size of the workpiece, it is possible to reduce the weight and speed of the winding equipment and to speed up the manufacturing process.

(Embodiment 5) FIG. 7 shows a form of a unit core in a split core construction method in a parallel star connection in a 12-slot three-phase brushless motor. Teeth 1
2. The core segment 11 composed of the yoke 13 is connected by a part of the yoke 13 to form a core segment series body 14 in which each tooth is substantially parallel. Two of the basic units 241 and 242 each composed of two unit coil units have the power supply terminal and the neutral point terminal shown in the above (Embodiment 3), and are unit cores of a core segment series body. 151 and 152 are divided. For the unit cores 151 and 152, each of the unit cores alone (the first embodiment)
By performing the process for one basic unit, continuous winding can be performed in a state where the unit cores are independent of each other. After the completion of the winding, the two unit cores rounded in an arc are connected, or the unit core of the core segment series body is connected to two unit cores.
Individually connected, one core segment series body is formed, and then rounded into an annular body, and integrated to be manufactured as a completed stator.

[0023]

As described above, according to the first aspect of the present invention, since continuous production is performed without the need for connection work in the post-winding process, the connection work of the parallel star can be performed with a small number of man-hours. In addition, it is possible to obtain an effect that it can be manufactured without the need for a connection material such as a connection end plate.

According to the third aspect of the present invention, the connection work in the post-winding process can be limited to a part of the power supply terminal, so that the connection work of the parallel star can be manufactured with a small number of man-hours and a small number of connection materials. In addition to the above-described effect, it is possible to simultaneously wind a plurality of winding conductors or to divide the steps so that the parallel star winding step can be manufactured with a small number of manufacturing steps. .

[Brief description of the drawings]

FIG. 1 is a winding pattern diagram showing an embodiment of a three-phase 12-slot parallel star connection of the present invention.

FIG. 2 is a wiring diagram of an embodiment of a three-phase 12-slot parallel star connection.

FIG. 3 is a view showing a form of a core segment series body in a split core method.

FIG. 4 is a winding pattern diagram showing another embodiment of the three-phase 12-slot parallel star connection of the present invention.

FIG. 5 is a connection diagram of another embodiment of a three-phase 12-slot parallel star connection.

FIG. 6 is a diagram of a unit core in a three-phase 12-slot parallel star connection of the present invention.

FIG. 7 is a diagram showing the form of a unit core of a core segment series body in a split core method in a three-phase 12-slot parallel star connection of the present invention

FIG. 8 is an outline view of an inner winding of a conventional three-phase six-slot stator.

FIG. 9 is a winding pattern diagram of a conventional three-phase 12-slot serial star connection.

FIG. 10 is a three-phase, 12-slot serial star connection diagram.

FIG. 11 is a three-phase, 12-slot parallel star connection diagram.

FIG. 12 is a wiring diagram of a conventional three-phase 12-slot parallel star connection.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Core segment 12 Teeth 13 Yoke 14 Core segment series body 15 Unit core 19 Neutral terminal 20 Coil 21 Crossover 22 Winding conductor 30 Stator 31 Connection terminal 32 Connection end plate 18U-18W U-W phase power supply Terminals 181U to 181W Power supply terminals for U to W phases of basic unit 1 182U to 182W Power supply terminals for U to W phases of basic unit 2 191 to 194 Neutral point terminals of unit coil units 1 to 4 20U1 to 20U4 U phase coils 1 to 4 20V1 to 20V4 V-phase coil 1 to 4 20W1 to 20W4 W-phase coil 1 to 4 221 to 222 Winding conductor for basic unit 1 to 2 231 to 234 Unit coil unit 1 to 4 241 to 242 Basic unit 1 ~ 2

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Ikugo Seki 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5H002 AA07 AB05 AB06 AC02 AE07 AE08 5H603 AA03 AA09 BB01 BB12 CA01 CA05 CC01 EE01 EE13 5H604 AA05 AA08 BB01 BB14 CC01 CC05 CC14 PC01 QA03 QB01 5H615 AA01 BB01 BB14 BB16 PP01 PP07 PP28 QQ02 SS03 SS04 SS16 TT05

Claims (5)

[Claims] 1. A stator core comprising a plurality of teeth and a yoke connecting the teeth, having a slot for accommodating a winding between adjacent teeth, and having an opening at a side opposite to the yoke side of the slot. In the method for manufacturing a motor stator having a slot (open slot) and winding the teeth on the teeth, 2n (n is a natural number) unit coil units (1 for each phase) forming a plurality of magnetic poles The adjacent coil wound around the teeth is assumed to be a unit coil unit.) The parallel star connection, in which the connections of each coil are star-connected, is connected in a single winding conductor, through a power supply terminal and a neutral terminal, out of phase or in phase. A method for manufacturing a motor stator, wherein coils are sequentially and sequentially wound. 2. The stator core is configured as a core segment series body in which a plurality of core segments each including one tooth are connected by a yoke, and each tooth is substantially parallel. The method according to claim 1, wherein after performing the step (a), the core segment series body is rolled into an annular body to form a motor stator. 3. A stator core comprising a plurality of teeth and a yoke connecting the teeth, the stator core having a slot for accommodating a winding between adjacent teeth, and an opening opposite to the yoke side of the slot. In the method for manufacturing a motor stator having a slot (open slot) and winding the teeth portion, a unit of 2 km (k and m are natural numbers and k ≧ 2) constituting a magnetic pole of a plurality of phases is provided. The connection of the coil units (adjacent coils wound on one tooth for each phase is defined as a unit coil unit) is connected in a star connection. A method for manufacturing a motor stator, comprising sequentially winding different-phase or in-phase coils sequentially through terminals, and then connecting k power terminals of each phase. 4. The stator core is divided into k unit cores each composed of 2m unit coil units, and after winding is performed for each unit core, they are connected to each other to form an electric motor stator. 4. The method for manufacturing an electric motor stator according to claim 3, wherein: 5. A core segment series body in which a unit core is divided into core segments each including one tooth, and a plurality of said core segments are connected by a yoke portion so that each tooth is substantially parallel. , And after being wound, it is rolled into an arc shape, and the wound k
The motor stator according to claim 4, wherein k unit cores are connected to each other or k serially wound core segment bodies are connected and rolled to form an annular body. Child manufacturing method.