JP2005269755A - Winding bobbin of stator for rotary electric machine having split core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding bobbin for forming the stator of a motor, in which individually split stator cores are coupled after winding, and the windings are electrically connected between the windings. <P>SOLUTION: The shape of the winding bobbin to be resin molded is improved. The winding bobbin has a space perpendicular to the traverse direction of a winder and in parallel, with a resin-moldable shape. The winding bobbin assures a creeping distance and a space distance based on safety standards and can sandwich the split core from both end face directions. Components, inserted from both left and right, have the same shape and a guide groove at the start of winding, legs for sandwiching a printed circuit board or an optimum shape having the entirety or a part, thereby solving the problem. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is an electric motor in which an individually divided stator core is connected after winding, and is used as a stator of an electric motor. The electric winding is electrically insulated between the divided core and the winding, and further a field winding is wound. It relates to wire bobbins.

  In recent years, for the purpose of improving the motor characteristics, in order to increase the space factor of the stator windings that make up the motor, the stator core laminated with electromagnetic steel sheets is divided into each main magnetic pole part. In this method, a winding is wound around an insulating material, and then the divided main magnetic poles are connected to form a stator of an electric motor. Each divided main magnetic pole is hereinafter referred to as a divided core.

  6 and 7 are disclosed as conventional examples in JP-A-11-018331. In FIG. 6, 21 is a split core, and 22 and 23 are formed of an insulating material and have winding bobbins. The winding bobbin sandwiches the split core from both end surface directions and is wound with a winding wound from above. Reference numeral 24 is a wound winding, 25 is a pin implanted in the winding bobbin, and 26 is a lead wire of the winding, and is wound around the pin 25.

7 also forms a plurality of divided cores 21 wound in a conventional manner in a ring shape, and solders the pins 25 to a printed wiring board 26, thereby connecting the connecting wires between the divided cores by printed wiring. Reference numeral 27 denotes a lead wire for energizing the motor.
Japanese Patent Laid-Open No. 11-018331

However, the above-described conventional system has the following problems.
(1) Ideally, the windings to be wound should be perfectly aligned, but as shown in FIG. 5 (a), the winding bobbin shape is open at 90 degrees or more on the inner diameter side of the stator. Because there is no space parallel to the traverse direction of the bobbin winding machine, even if perfect alignment winding is performed, the winding sits badly and collapses, making the winding far from perfect alignment winding. There was a problem.
(2) Although the rated voltage of the rotating electrical machine becomes a high voltage and it is required to ensure a creepage distance and a spatial distance based on safety standards, there is a problem that a sufficient creepage distance and a spatial distance cannot be secured.
(3) The winding bobbin sandwiches the split core from both end surfaces and is wound from above. However, the winding bobbin has a different shape on the left and right, so it does not have the same mold. The mold investment amount has been rising.
(4) Since there is no guide groove at the beginning of winding, the wire end at the beginning of winding has a factor that disturbs the execution of the aligned winding.
(5) There is a problem that the man-hours for winding the end of the winding to the pin or the equipment cost of the automatic machine for performing the process of winding the winding end to the pin are increased.

  The present invention solves such a conventional problem, and provides a winding bobbin that is easy to arrange windings, is inexpensive, and has excellent workability and insulation reliability.

  In order to solve the above-mentioned problems, the present invention improves the shape of a resin-molded winding bobbin, has a shape that can be resin-molded, and has a space parallel to the traverse direction of the bobbin winding machine. The creeping distance and the spatial distance based on the can be secured, the split core can be sandwiched from both ends, the parts inserted from the left and right are the same shape, the guide groove is at the beginning of the winding, and the printed circuit board is sandwiched The problem is solved by making it an optimal shape with legs or all or some of them.

The winding bobbin according to the present invention has the following effects.
(1) An inexpensive winding machine called a bobbin winding machine with a traverse function enables aligned winding, and as a result, it is possible to wind in a possible space, resulting in an improved winding space factor and a motor. Efficiency can be improved.
(2) A creepage distance and a spatial distance between the coil (charging portion) and the stator core iron core can be increased.
(3) The winding bobbin has the same shape on the left and right sides, and can be manufactured with the same mold, so that the investment amount of the mold can be reduced.
(4) The insulation distance was secured by effectively inserting a hiller of about 1/2 of the basic molding thickness into a part of the winding bobbin, thereby facilitating assembly.

  The best mode for carrying out the invention is a rotating electrical machine in which the rotor is on the inside and the stator is laminated, and the stator is on the outside, and the stator is a divided core divided into slots, It is desirable that the iron core teeth around which the stator is wound have a parallel shape. However, even if the core tooth portion is not parallel, by changing the thickness of the bobbin, it is possible to have a space that is perpendicular to the traverse direction and parallel to the bobbin winding machine.

  FIG. 1 shows the shape of a wound bobbin embodying the present invention. The space shape to be wound first is parallel to the traverse direction of the winding machine at a right angle. The parts inserted from the left and right of the split iron core are inserted into each other with a hiller to ensure the creepage distance.

Fig. 2 schematically shows the winding bobbin mounted on the split core from the left and right, and Fig. 3 schematically shows the winding bobbin mounted on the split core from the left and right, and wound from above. Indicates. FIG. 4 shows a part when it is partially assembled as a stator of a rotating electrical machine. When the partial assembly is performed, the insulation distance between the outer core portion and the coil is also set so that the hillers are inserted into each other, thereby ensuring the insulation distance and creepage distance required by safety standards.
As shown in FIGS. 5 (a), 5 (b), and 5 (c), the magnetic pole portion of the split iron core on the inner diameter side of the rotating electrical machine becomes thinner toward the outside as it extends toward both sides. The wound core teeth have a uniform and parallel shape. By making the shape of the winding bobbin straight at a right angle from the contact portion of the iron core tooth portion around which the magnetic pole portion is wound, the space distance between the magnetic pole portion and the winding is ensured. 5 (a) and 5 (b) show a conventional wound bobbin shape and a partially wound product. FIG. 6 (a) shows a space in the iron core and the winding bobbin, and it is clear that the creeping distance is secured in the schematic diagram showing the present invention in FIG. 6 (c). FIG. 6B shows a state where the winding machine cannot wind even if the creeping distance is secured.

  FIG. 3 shows a partial view of the shape in which the divided cores are assembled as a stator. The state regarding the insulation hiller which ensures the space distance and creepage distance with the motor outer periphery core part of this invention is shown. The insulation hiller is about ½ of the resin molded basic wall thickness of the bobbin body, and is softened by making it thin, making it easy to be inserted while intersecting, thereby making it easy to secure an insulation distance.

  According to the present invention, the aligned winding is connected to the stator core divided into cores, and then connected to the rotating core used in the stator of the rotating electrical machine, so that the rated voltage of the rotating electrical machine to be designed is increased, so that Even if the insulation distance required by the standard becomes long, it becomes easy to secure the spatial distance and creepage distance, and it can be applied to rotating electric machines of any split core.

1 shows a wound bobbin according to the present invention. A winding bobbin according to the present invention is inserted into a split iron core from the left and right, and a state of being wound is schematically shown. The winding bobbin according to the present invention is inserted into the split iron core from the left and right sides, and the wound state is shown. The part which assembled the split iron core stator part of the rotary electric machine is shown. The figure which shows the comparison of the conventional winding bobbin shape example and this invention The figure which shows the state wound by the winding bobbin around the conventional split iron core The part which assembled the split iron core stator part of the conventional rotary electric machine is shown. Sectional view showing structure of rotating electrical machine

Explanation of symbols

1: Split core 2: Winding 3: Winding bobbin 4: Iron core magnetic pole part 5: Iron core tooth part 6: Outer circumferential iron part 7: Guide groove at the start of winding 8: Printed circuit board fixing hook 9: Filler 10: Winding end guide Groove 11: Rear case 12: Lead wire 13: Filler intersection

Claims (4)

A stator core made of laminated electromagnetic steel sheets forms a split core divided into a plurality of parts, and the split core has a winding bobbin formed of a resin having an electrical insulation property to be wound,
1)
When wound with a bobbin winding machine, it has a space perpendicular to and parallel to the traverse direction,
2)
Has a guide groove at the beginning of winding,
3)
The joint part is about half the thickness of the molded resin, and has a length that satisfies the creepage distance and space distance required by safety standards,
4)
A winding bobbin for a stator of a rotating electrical machine having a split core, wherein the hillers are overlapped with each other and constitute an insulation with an adjacent split core iron core when assembled. 2. A winding bobbin according to claim 1, further comprising a guide groove at the start of winding of the winding. The winding bobbin according to claim 1, characterized in that the divided core is covered with two parts made of the same shape from both sides, and further has a guide groove for winding start. Winding bobbin of a stator of a rotating electric machine with a split core. The winding bobbin according to claim 1, which covers two parts made of the same shape from both sides, covers the split core so as to wrap, has a guide groove at the beginning of winding, and further sandwiches the printed circuit board A winding bobbin for a stator of a rotating electric machine having a split core characterized by having legs.