JP2005224052A - Motor and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor for reducing a work for winding a coil and a working time for connecting wires. <P>SOLUTION: After a magnet coil 4 is wound onto magnetic pole teeth 2a-2i of a stator core 10 at a time without breaking, jumper wires 4b, 4d, 4f, 4h indicated by a solid line and located on the front side of paper of the stator core 10 are cut at cutting points 43-46 so as to form input terminals 47-49, and jumper wires 4a, 4c, 4e, 4g, 4i indicated by a chain double-dashed line and located on the back side of the paper of the stator core 10 are connected at connections 51-54 so as to form a neutral point. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an inner rotor type electric motor in which a magnet coil is wound around each magnetic pole tooth of a stator core and Y-connected, and more specifically, a coil winding operation and a wiring operation. The present invention relates to a technology that can shorten time.

  As shown in FIG. 4, the stator core 1 of the inner rotor type electric motor is formed by stacking a plurality of punched electromagnetic steel sheets, and a plurality of magnetic pole teeth 2 a to 2 i on the inner peripheral side toward the center side. (Teeth) is formed. Slots 3a to 3i for winding the coil 4 are formed between the magnetic pole teeth 2a to 2i, and the surfaces of the slots 3a to 3i are insulated by an insulator (not shown).

  Normally, in order to wind the coil 4 around the magnetic pole teeth 2a to 2i of the stator core 1, a nozzle (not shown) of a winding device is inserted into the slots 3a to 3i, and the magnetic pole teeth 2a to 2i The coil 4 was wound while moving one by one. That is, the process of starting coil winding → magnet wire cutting → nozzle movement → starting winding of the next magnetic pole tooth is common for one magnetic pole tooth.

  However, if the coils 4 are wound around the magnetic pole teeth 2a to 2i one by one, the working efficiency is poor. Thus, for example, Patent Document 1 discloses a method of winding a magnetic pole tooth corresponding to each of the U-phase, V-phase, and W-phase of a three-phase brushless motor without cutting the coil. As a result, the coil winding operation and the wire connection operation can be shortened.

  As another method for shortening the working time, for example, in Patent Document 2, three nozzles arranged in parallel in slots of magnetic pole teeth of a stator core previously deployed on a straight line are used. There is also a type in which a coil is wound around three magnetic pole teeth.

  However, the above-described conventional example has the following problems. That is, the electric motor described in Patent Document 1 is based on the premise that the coils of each phase are serially (series) Y-connected. Several winding operations are required, and processing time and processing effort are required to process the crossover at the beginning and end of winding.

  In the case of using a thick coil used for a stator core of a high-output motor such as a compressor, the electric motor described in Patent Document 2 needs to increase the holding strength of the nozzle with respect to the tensile strength of the coil. It was difficult to increase the holding strength of the book nozzles simultaneously. This Patent Document 2 also discloses a parallel connection method as in Patent Document 1.

Japanese Patent Publication No. 7-85631 JP-A-9-191588

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a parallel-connected motor that can shorten the work time of coil winding work and connection work. is there.

  In order to achieve the above-described object, the present invention has several features described below. First, in claim 1, in the method of manufacturing an electric motor in which a magnet coil is wound around a plurality of magnetic pole teeth formed on a stator core and then the magnet coil is Y-connected, the magnet coil is cut halfway. Without winding, the winding teeth are continuously wound from the magnetic pole tooth at the beginning of winding to the adjacent magnetic pole tooth until reaching the magnetic pole tooth at the end of winding, and a part of the connecting wire between the magnetic pole teeth is cut. While forming an input terminal part, it is characterized by connecting the remaining connecting wires and forming a neutral point.

  According to a second aspect of the present invention, the cutting point of the magnet coil is defined as a first cutting point at a position 1.5P (P is the pitch angle of the magnetic pole teeth) from the magnetic pole teeth at the beginning or end of winding. It is characterized by being provided at 2P intervals with respect to the first cut point.

  According to a third aspect of the present invention, the neutral point is defined as a first neutral point at a position of 0.5 P (P is the pitch angle of the magnetic pole teeth) from the magnetic pole tooth at the beginning or end of winding. The neutral point is provided at 2P intervals.

  In claim 4, when the magnetic pole tooth at the beginning or end of the winding is number 1, the cutting point is between the 2k-th magnetic pole tooth (k is a positive integer) and the 2k + 1-th magnetic pole tooth. The neutral point is formed by connecting the connecting wires routed between the 2k-1st magnetic pole tooth and the 2kth magnetic pole tooth. It is characterized by.

  In claim 5, when the magnetic pole tooth that is the beginning or end of the winding is No. 1, the cutting point is the 2k-1th (k is a positive integer) magnetic pole tooth, the 2kth magnetic pole tooth, The neutral point is formed by connecting the connecting wires routed between the 2k-th magnetic pole tooth and the 2k + 1-th magnetic pole tooth to each other. It is characterized by.

  According to a sixth aspect of the present invention, the stator core can be deployed in a state where the magnetic pole teeth are arranged in a straight line, and the magnet coil is directed from the magnetic pole teeth on one end side to the magnetic pole teeth on the other end side in the expanded state. It is characterized by being wound sequentially and continuously.

  The stator iron core is characterized in that the number of magnetic pole teeth of the stator is 3n (n is a positive integer).

  In Claim 8, the said input terminal part is formed by cut | disconnecting the said connecting wire pulled out to the any one end surface side of the said stator core, The said neutral point is either of the said stator core It is characterized in that it is formed by connecting the crossover wires drawn out to the other end face side.

  The present invention also includes an electric motor created by this manufacturing method. That is, according to the ninth aspect of the present invention, in the electric motor in which the magnet coil is wound around the plurality of magnetic pole teeth formed on the stator core and the magnet coil is Y-connected, the magnet coil is a magnetic pole that starts winding. The winding is continuously wound from the teeth to one of the adjacent magnetic pole teeth until reaching the end of the magnetic pole teeth. Of the connecting wires drawn between the magnetic pole teeth, the winding start or the winding end A connecting line of 1.5P (P is the pitch angle of the magnetic pole teeth) is used as the first cutting point from the magnetic pole teeth. After that, cutting points are formed on the connecting line having an interval of 2P from the first cutting point. At the same time, the connecting wire of 0.5P (P is the pitch angle of the magnetic pole teeth) from the magnetic pole tooth at the beginning or end of winding is set as the first neutral point. A neutral point is formed on the crossover It is characterized in that.

  According to the first aspect of the present invention, the magnetic coil teeth are wound so as to cross each other without cutting the magnet coil, and a predetermined position is cut or connected, so that Y connection can be easily obtained. Work and wiring work can be greatly shortened.

  According to the second and third aspects of the present invention, the magnet coil drawn to one end side of the stator core is cut to form the input terminal portion, and the magnet coil drawn to the other surface is connected. By forming the neutral point, not only can the connection work be performed more easily, but also post-processing after the connection is simple.

  According to the fourth and fifth aspects of the present invention, connection work can be easily performed by providing a cutting point and a neutral point at a position that satisfies this condition regardless of the number of magnetic pole teeth.

  According to the sixth aspect of the present invention, it is possible to wind the magnet coil in a state where the stator core is unfolded on a straight line, the winding time can be further shortened, and the subsequent assembling work is also simple.

  According to the seventh aspect of the present invention, any electric motor having a slot combination that satisfies this condition can be applied to various electric motors without changing the basic specifications.

  According to the invention described in claim 8, by connecting the connecting wires on the cutting point side and the neutral point side separately to the side surfaces of the stator core, the connection work can be simplified and the working time can be shortened. Can do.

  According to the ninth aspect of the present invention, the Y-connection can be easily obtained because the predetermined portion is cut or connected, and the winding work and the connection work can be greatly shortened.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a winding structure of a stator core of an electric motor according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a winding state and a connection state thereof. In addition, the same referential mark is attached | subjected to the part considered to be the same as that of the prior art example mentioned above, and the description is abbreviate | omitted. The electric motor of the present invention is limited to a type in which the magnet coils are Y-connected in parallel.

  The present invention relates to the winding structure of the stator core, in particular, among the components constituting the motor, and the configuration of other components such as the rotor, various bearings, and brackets may be arbitrary. The illustration and description are omitted.

  As shown in FIG. 1, the stator core 10 is made of a laminate in which a plurality of punched electromagnetic steel sheets are laminated to have a predetermined thickness in this example, and a plurality of stator steel cores 10 are arranged from the inner peripheral side toward the center. This is a so-called inner rotor type in which the magnetic pole teeth 2a to 2i are projected. In this example, the magnetic pole teeth 2a to 2i are provided at nine positions with a predetermined pitch.

  Nine slots 3a to 3i for winding the magnet coil 4 are similarly provided between the magnetic pole teeth 2a to 2i. The slots 3a to 3i are formed in a fan shape so that the volume thereof increases from the inner peripheral side toward the outer peripheral side.

  In the present invention, the shape and magnetic characteristics of the magnetic pole teeth 2a to 2i and the slots 3a to 3i are arbitrary and can be freely changed according to the specifications, so that more specific description thereof is omitted.

  Each of the magnetic pole teeth 2a to 2i is covered with an insulating material (not shown) such as a synthetic resin, and the magnet coil 4 is wound directly around the insulating material. In this example, the magnet coil 4 is of a type that is thicker than a magnet coil that is used for a general electric motor for a compressor.

  First, the magnet coil 4 starts to be wound around the first magnetic pole tooth 2a from the winding start end 41, and is wound around the next adjacent magnetic pole tooth 2b without being cut halfway. Similarly, the magnet coil 4 is wound around the adjacent magnetic pole teeth 2c to 2h one after another without being cut in the clockwise direction until reaching the final magnetic pole tooth 2i, from which the winding end is reached. 42 is pulled out.

  In this example, when the winding direction of the magnet coil 4 is such that the first magnetic pole tooth 2a is the first, the even-numbered magnetic pole teeth 2d, 2f, and 2h including the second magnetic pole tooth 2b are The odd-numbered magnetic pole teeth 2c, 2e, 2g and 2i including the first magnetic pole tooth 2a are wound in opposite directions.

  As shown in FIG. 1 and FIG. 2 (a), the connecting wires 4a to 4i of the magnet coil 4 spanned between the magnetic pole teeth 2a to 2i are routed between the magnetic pole teeth 2a to 2i. Yes. Among the connecting wires 4a to 4i, the winding start end 41 and the connecting wires 4b, 4d, 4f, and 4h are drawn out to one end surface of the stator core 10 (the front side in FIG. 1). The remaining winding end 42 and each of the connecting wires 4a, 4c, 4e, 4g, and 4i are drawn out to the other surface of the stator core 10 (the back side in FIG. 1).

  In FIG. 1, the winding start end 41 and the connecting wires 4b, 4d, 4f, and 4h drawn out to the front side of the drawing are shown by solid lines, and the winding end 42 and the connecting wires 4a, 4c drawn out to the back side of the drawing. 4e, 4g, and 4i are illustrated by two-dot chain lines.

  In the magnet coil 4 wound around the stator core 10, the crossover wires 4 b, 4 d, 4 f, and 4 h including the winding start end 41 are cut at predetermined cutting points 43 to 46. By connecting the cut points for each of the U phase, V phase, and W phase, the input terminal portions 47 to 49 for each phase shown in FIG. 2B are formed. In this embodiment, the input terminal 47 is a U-phase, the input terminal 48 is a V-phase, and the input terminal 49 is a W-phase input terminal.

  Each of the connecting wires 4a, 4c, 4e, 4g, and 4i is provided with four connection portions 51 to 54 for forming neutral points. In this embodiment, the connection parts 51 to 54 are composed of conductive clips that obtain electrical continuity by sandwiching each of the crossover wires 4a, 4c, 4e, 4g, and 4i so as to straddle the two crossover wires without cutting them. By attaching, conduction is ensured.

  In this embodiment, the connecting portion 51 connects the connecting wire 4a and the connecting wire 4c, the connecting portion 52 connects the connecting wire 4c and the connecting wire 4e, and the connecting portion 53 connects the connecting wire 4e and the connecting wire 4g. The connecting portion 54 connects the crossover line 4g and the crossover line 4i.

  According to this, first, the magnet coil 4 is wound around the stator core 10 without cutting, and then the connecting wires 4b, 4d, 4f, and 4h are cut at the cutting points 43 to 46 to input terminal portion 47. To 49, and then connecting each of the connecting wires 4a, 4c, 4e, 4g, and 4i through the connecting portions 51 to 54 without cutting, thereby forming a neutral point in a simple and short time. Each phase of U phase, V phase, and W phase as shown in FIG. 2B can be Y-connected (star-connected).

  Next, a modification of the present invention will be described with reference to FIGS. 3 (a) and 3 (b). As shown to Fig.3 (a), this stator core 60 can be expand | deployed in the state which arranged each magnetic pole tooth 2a-2i in a straight line. That is, the magnetic pole teeth 2a to 2i are connected to each other through a connecting portion that is made into a thin hinge by using, for example, a synthetic resin, and the magnetic pole teeth 2a to 2i can be bent through the thin hinge portion. ing.

  In the unfolded state shown in FIG. 3A, the magnet coil 4 is wound around the stator core 60 sequentially and continuously from the magnetic pole tooth 2a on one end side to the magnetic pole tooth 2i on the other end side. In this embodiment as well, the even-numbered magnetic pole teeth 2b, 2d, 2f, and 2h have the magnet coil 4 wound in the opposite direction to the odd-numbered magnetic pole teeth 2a, 2c, 2e, 2g, and 2i. .

  According to this, when the magnet coil 4 is wound around the magnetic pole teeth 2a to 2i while the stator core 60 is expanded in a straight line, the amount of movement of the nozzle is small, so that the winding time is further shortened. can do. Further, since the space between the slots 3a to 3i is widened, it is possible to prevent a nozzle contact accident or the like.

  After the magnet coil 4 is wound, the stator core 60 is bent into an annular shape so that both ends thereof are brought into contact with each other, and engaging portions formed at both ends are fitted to each other, as shown in FIG. An annular stator core 60 is obtained.

  Thereafter, in the same manner as described above, the connecting wires 4b, 4d, 4f, and 4h are cut at the cutting points 43 to 46 to form input terminal portions, and then the connecting wires 4a, 4c, 4e, 4g, and 4i are connected to the connecting portions. By connecting at 51 to 54 to form a neutral point, the U phase, V phase, and W phase can be Y-connected (star-connected) in parallel.

  In terms of the rotational symmetry of the motor, the connecting wire forming the above-described cutting points 43 to 46 and the connecting wire forming the connecting portions (neutral points) 51 to 54 are exchanged, that is, the cutting points. Even if the neutral point is formed in reverse, the effect is the same.

  In this embodiment, the number of magnetic pole teeth of the stator core 10 is 9, but in the present invention, when the number of magnetic pole teeth of the stator is 3n (n is a positive integer), the number of slots of the rotor is 2n. If it is satisfied that (n is a positive integer), it can be applied to all stator cores.

  In this case, if the magnetic pole tooth at the beginning of winding is the first and the magnetic pole tooth at the end of winding is the 3nth (n is a positive integer), the cutting point is the 2kth (k is a positive integer) magnetic pole tooth And the 2k + 1-th magnetic pole tooth, the neutral point is formed between the 2k-1th magnetic pole tooth and the 2k-th magnetic pole tooth. Is formed.

  In this embodiment, the connecting wires 4a, 4c, 4e, 4g, and 4i constituting the neutral point are connected without being cut, and thus are cut at the entire winding of the magnet coil 4. A location is only each cutting point 43-46 mentioned above.

The winding structure of the stator core of the electric motor which concerns on one Embodiment of this invention. The circuit diagram which shows the winding state and connection state of the magnet coil of the said embodiment. The winding structure and assembly drawing of the stator core of the electric motor which show another embodiment. Winding structure of a conventional stator core of an electric motor.

Explanation of symbols

10, 60 Stator core 2a-2i Magnetic pole teeth 3a-3i Slot 4 Magnet coil 41 Winding end 42 Winding end 43-46 Cutting point 47-49 Connection point 4a-4i Crossover

Claims (9)

In a method of manufacturing an electric motor in which a magnet coil is wound around a plurality of magnetic pole teeth formed on a stator core, and then the magnet coil is Y-connected.
The magnet coil is continuously wound from the magnetic pole tooth at the beginning of winding to the one magnetic pole tooth adjacent to the magnetic pole tooth at the end of winding without being cut halfway. A method for manufacturing an electric motor, comprising: cutting a part of a connecting wire to form an input terminal portion; and connecting the remaining connecting wires together to form a neutral point.   The cutting point of the magnet coil is defined as the first cutting point at a position 1.5P (P is the pitch angle of the magnetic pole teeth) from the magnetic pole tooth at the beginning or end of winding. The method for manufacturing an electric motor according to claim 1, wherein the motor is provided at intervals of 2P.   The neutral point is defined as the first neutral point at a position of 0.5 P (P is the pitch angle of the magnetic pole tooth) from the magnetic pole tooth at the beginning or end of winding. The method for manufacturing an electric motor according to claim 1 or 2, wherein the motor is provided at intervals of 2P.   When the magnetic pole tooth at the beginning or end of the winding is the first, the cutting point is a transition routed between the 2k-th magnetic pole tooth (k is a positive integer) and the 2k + 1-th magnetic pole tooth 4. The neutral point is formed by connecting the connecting wires routed between the 2k-1th magnetic pole tooth and the 2kth magnetic pole tooth to each other. The manufacturing method of the electric motor of description.   When the first magnetic pole tooth at the beginning or end of the winding is number 1, the cutting point is routed between the 2k-1th magnetic pole tooth (k is a positive integer) and the 2kth magnetic pole tooth. 4. The neutral point is formed by connecting the connecting wires routed between the 2k-th magnetic pole teeth and the 2k + 1-th magnetic pole teeth. The manufacturing method of the electric motor of description.   The stator iron core can be deployed in a state where the magnetic pole teeth are arranged in a straight line, and in the expanded state, the magnet coil is sequentially and continuously from the magnetic pole teeth on one end side to the magnetic pole teeth on the other end side. The manufacturing method of the electric motor of any one of Claims 1-5 wound.   The method of manufacturing an electric motor according to any one of claims 1 to 6, wherein the stator core has a number of magnetic pole teeth of the stator of 3n (n is a positive integer).   The input terminal portion is formed by cutting the connecting wire drawn to one end face side of the stator core, and the neutral point is on the other end face side of the stator core. The manufacturing method of the electric motor of any one of Claims 1-7 currently formed by connecting the said said connecting wire pulled out. In an electric motor in which a magnet coil is wound around a plurality of magnetic pole teeth formed on a stator core and the magnet coil is Y-connected,
The magnet coil is continuously wound from the magnetic pole tooth at the beginning of winding to one of the adjacent magnetic pole teeth until it reaches the magnetic pole tooth at the end of winding, and is passed between the magnetic pole teeth. Among the wires, a connecting wire of 1.5 P (P is the pitch angle of the magnetic pole teeth) from the magnetic pole teeth at the beginning or end of winding is set as the first cutting point. A cutting point is formed on the connecting wire, and the connecting wire of 0.5 P (P is the pitch angle of the magnetic pole tooth) is set as the first neutral point from the magnetic pole tooth at the beginning or end of winding. The neutral point is formed in the crossover of the 2P space | interval with respect to the neutral point of an electric motor characterized by the above-mentioned.

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