JP2005245138A - motor - Google Patents

Abstract

In a conventional motor having a built-in electronic circuit and composed of split cores, it is necessary to secure a large area for mounting electronic parts and wiring of connecting wires connecting windings between split cores. In many cases, it is necessary to increase the number of printed wiring boards in order to secure the shape restrictions and the creepage distance of the printed wiring.
A printed wiring board is separated for crossover processing between each divided core and for mounting an electronic circuit, and two inexpensive printed wiring boards having a single-sided pattern are used. Further, before winding the divided cores, the divided cores are sandwiched from both end surfaces by two sets of winding frames of the same shape formed of an insulating material provided with a hook for supporting the printed wiring board. By arranging the printed wiring board for line wiring and the printed wiring board for electronic circuits in the opposite direction across the end face of the split core, it is inexpensive in the motor, including space saving of the mounting space and the method of supporting the printed wiring board Arrange in a simple configuration.
[Selection] Figure 1

Description

  The present invention relates to a motor in which individually divided stator cores are connected in an annular shape after winding, and the windings are electrically connected.

  In recent years, in order to improve 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. A method of winding a winding through an insulating material is used. Each divided main magnetic pole is hereinafter referred to as a divided core.

  There are two split core systems. The first system is a system in which each split core is completely separated, a winding is wound around each split core, and then combined into a ring shape. In the second method, a connecting portion having a minimum width is provided and connected between each divided core, a winding is wound around each divided core in this state, and the connecting portion is bent to form a ring shape.

  2 and 3 are disclosed as a conventional example in Japanese Patent Laid-Open No. 11-18331, and illustrate the first method described above. In FIG. 2, 21 is a split core, and 22 and 23 are winding frames which are formed of an insulating material and sandwich the split core from both ends. Reference numeral 24 denotes a wound winding, 25 denotes a pin implanted in the winding frame, and 26 denotes a winding wire that is wound around the pin 25.

  In FIG. 3, a plurality of wound divided cores 21 are formed in a ring shape, and the pins 25 are soldered to a printed wiring board 28 to connect the connecting wires between the divided cores by printed wiring. , 27 are energizing motor lead wires for the three-phase motor.

FIG. 4 also shows the second method proposed in Japanese Patent Laid-Open No. 11-18331. Reference numeral 31 denotes a connecting core in which a connecting portion having a minimum width is provided between the divided cores, and 32 and 33 are winding frames which are formed of an insulating material and sandwich the divided core from both end surface directions. Also, 34 is a wound winding, and 38 is a connecting wire for connecting the divided core windings. In this method, the dividing core windings are continuously wound without being cut. The line itself. In addition, the connecting wire from the split core to the split core passes through a groove provided in the winding frame of the split core during the winding process, and there is a portion where the crossover wire crosses. Insulation is ensured by providing them at different positions. Similar contents are also disclosed in Japanese Patent No. 3017085.
Japanese Patent Laid-Open No. 11-18331 Japanese Patent No. 3017085

  However, in the above-described second method, since the split cores are not completely separated, there are problems in that workability of winding winding is poor and complete alignment winding is difficult. Furthermore, it is difficult to arrange the crossovers between the split cores in the grooves provided in the insulator, and many methods have been disclosed but have not been practically used.

  The first method has better workability and space factor improvement for winding winding. In this method, it is necessary to solder the winding terminal lines twice as many as the number of divided cores on the printed wiring board and to wire the connecting wires between the divided cores on the printed wiring board. In addition, when the voltage for driving the motor becomes high, it is necessary to maintain the distance between the printed wirings in order to secure the creeping distance between the crossover wires due to the problem of insulation characteristics. For example, in the provision of creepage distance in the Electrical Appliance and Material Safety Law, when the operating voltage is 300V to 600V, 3.5 mm or more is required, and considering safety, 4 mm or more is required at least.

  An even greater problem occurs when electronic components are built into the motor. In many cases, an electronic circuit for driving a motor is mounted on a printed wiring board, and it is necessary to secure a large area for mounting electronic parts and the distance between the wiring lines. In addition, there are restrictions on the shape of the motor, which requires a multilayered printed wiring board and the like, which greatly increases the cost of the motor. Another problem is that the split cores are poor in workability because they are aligned in a cylindrical jig before being inserted into the case and temporarily fixed in an annular shape, and then inserted into the motor case.

  The present invention solves such a conventional problem, and provides a simple method for wiring a crossover wire that is inexpensive, excellent in workability and reliability.

In order to solve the above problems, in the present invention, the printed wiring board is separated for the crossover processing between the divided cores and for mounting the electronic circuit, and two inexpensive single-sided printed wiring boards are used. .
Further, before winding the divided cores, the divided cores are sandwiched from both end surfaces by two sets of winding frames of the same shape formed of an insulating material provided with hook protrusions for supporting the printed wiring board. By arranging the printed wiring board for line wiring and the printed wiring board for electronic circuit in the opposite direction across the end face of the split core, the mounting space is saved and the printed wiring board support method is included in the motor. Use an inexpensive configuration. Further, by providing a structure in which the printed wiring board is supported in both directions of the end face of the split core before the split core is inserted into the case, the split core can be temporarily fixed in an annular shape.

The motor using the split core according to the present invention has the following features depending on the method of wiring the jumper between the split cores.
(1) It can be constituted by an inexpensive printed wiring board having only single-sided wiring.
(2) The printed wiring board is supported in both directions of the end face of the split core by hooks integrated with the winding core of the split core insulation, and the motor can be miniaturized.
(3) When inserting the split core into the case, as a means for temporarily fixing the split core in a ring shape, a structure that supports the printed wiring board in both directions of the end face of the split core is effective, which improves assembly. it can.

  A plurality of split cores made of laminated magnetic steel sheets are provided with hooks that support the printed circuit board. Each split core is sandwiched from the end face direction by two sets of winding frames of the same shape formed of an insulating material. In a state where the wound cores are arranged in a ring shape, a first printed wiring board for inexpensive crossover wiring with only single-sided wiring is attached with a hook, and the winding terminal from the divided core is attached to the printed wiring board. Solder. Also, prepare a second printed wiring board to be mounted with the motor lead wire connection and electronic circuit component according to the number of motor phases, and sandwich the first printed wiring board and the second printed wiring board in the direction of the split core end face, Place on both sides.

  FIG. 1 shows a first embodiment according to the first aspect. 1 is a plurality of split cores laminated with electromagnetic steel sheets, 2 is a wound winding, 3 is a winding frame for windings that are composed of two sets of the same shape, and sandwich each split core from both ends. Molded with insulating material. 4 is a hook that supports the printed circuit board, and is molded integrally with the reel 3. 7 is a motor shaft, 8 is a rotor fixed to the motor shaft, 9 is a bearing that rotatably supports the shaft 7, and 10 is a front case. 11 is a rear case, and 12 is a power supply and signal lead wire for driving the motor, which are on the rear case 11 side.

Reference numeral 6 designates a first printed wiring board for wiring only the crossover portion connecting the windings between the divided cores, and is disposed on the front case 10 side. Reference numeral 5 denotes a second printed wiring board on which winding terminal wires and electronic circuit components corresponding to the number of motor phases are mounted, and is arranged on the rear case side where the lead wires 12 are provided. The assembly procedure of the first printed wiring board 6 and the second printed wiring board 5 of this motor is as follows.
The plurality of divided cores 1 are formed in an annular shape after winding the windings 2, the first printed wiring board is attached by hooks 4, and soldered to the copper foil lands provided on the first printed wiring board 6. And inserted in the front case 10 in that state. Thereafter, an assembly part in which the motor shaft 8 and the rotor 9 are fixed is inserted into the inner diameter side of the annular split core 1. Then, the second printed wiring board 5 on which the electronic circuit components are already mounted is attached by the hooks 4 and winding terminal lines corresponding to the number of motor phases connected to the electronic circuit are provided on the second printed wiring board 5. Soldered to the land.

  With this motor structure, the printed wiring board can be made into an inexpensive single-sided wiring. Moreover, the printed wiring board is supported in both directions of the end face of the split core, so that the motor can be miniaturized. In addition, with the split cores formed in a ring shape, a printed wiring board for crossover wiring can be attached to improve assembly.

  Although not shown, the first printed wiring board 6 is devised to be mounted on the rear case 11 side between the split core 1 and the second printed wiring board 5, so that the printed wiring board can be manufactured on an inexpensive one side. Needless to say, wiring is possible and it is effective for cost reduction.

  According to the present invention, a winding of a motor that achieves a high space factor with a split core structure in which each split core is completely separated, a winding is wound around each split core, and then combined into a ring shape. The printed wiring board that is electrically connected to each other is composed of two inexpensive single-sided wiring boards, has good assemblability, and can easily ensure the creepage distance specified by the Electrical Appliance and Material Safety Law. It is an effective means of downsizing and can be applied to any split core motor.

It is sectional drawing of the motor of this invention. It is explanatory drawing of the conventional division | segmentation core and winding. It is explanatory drawing of the conventional division | segmentation core and winding. It is explanatory drawing of the conventional division | segmentation core and winding.

Explanation of symbols

1: Split core 2: Winding 3: Winding frame 4: Hook 5: Second printed wiring board 6: First printed wiring board 7: Shaft 8: Rotor 9: Bearing 10: Front case
11: Rear case 12: Lead wire 21: Divided core 22: Winding frame 23: Winding frame 24: Winding 25: Pin 26: Winding lead wire 27: Motor lead wire 28: Printed wiring board 31: Connecting core 32: Winding Frame 33: Winding frame 34: Winding 37: Motor lead wire 38: Crossover wire

Claims (2)

  A plurality of magnetic pole teeth made of laminated electromagnetic steel sheets are individually divided to form a split core, and a winding winding frame having electrical insulation is formed on the split core from the end face direction perpendicular to the stack. The winding winding frame is combined so as to be wrapped by two winding winding frames, and a hook for supporting a printed wiring board is provided on the winding winding frame, and a winding is wound for each of the divided cores. In a motor configured to mount an electronic circuit component for driving a motor and to connect windings between divided cores, and to combine the divided cores in an annular shape, the printed wiring board is divided into divided cores. The first printed wiring board for wiring the connecting wire portion connecting the windings between them, and the second printed wiring board for mounting the motor lead wire connection and the electronic circuit component corresponding to the number of motor phases are arranged separately. That is characterized by Data.   A motor, wherein the first and second printed wiring boards are disposed on both sides of the divided core in the end face direction.