JPH084375B2 - Induction motor stator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of a small induction motor used for fans, ventilation fans and the like.

2. Description of the Related Art Conventionally, in a stator of an induction motor of this type, when a winding conductor is directly wound around a tooth core 101 as shown in FIGS. 5 to 7, first winding 102 is wound. After that, the second winding 103 is wound at a position separated by an electrical angle of 90 °. After winding the winding for one pole of the second winding 103, the crossover 107 is connected to the first winding guide 105.
In this case, an insulating wedge 104 is inserted from the lower side into the opening 108 when the winding of the next pole is wound by passing through the side opposite to the winding and the winding of all the windings is completed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional configuration, when the insulating wedge 104 having a length that sufficiently secures the insulating distance between the winding and the iron core is inserted, the connecting wire 107 is caught at the end of the insulating wedge 104, Not only is it difficult to insert the insulating wedge 104, but there is a problem that the crossover wire 107 lifted up is broken.

The present invention solves such a problem, and an object thereof is to enable smooth insertion work of an insulating wedge for insulating between a winding wire and an iron core, and at the same time to eliminate a process defect due to a disconnection of a crossover wire. .

Means for Solving the Problem In order to solve this problem, the present invention has, on the outer periphery of a rotor hole into which a rotor is inserted, a tooth core having a plurality of teeth radially wound with a winding conductor, An insulating wedge inserted into the opening between the plurality of teeth, a yoke core that is press-fitted to the outer periphery of the tooth core, and a first winding wound directly around the tooth core. A second winding wound directly around the first winding at an electrical angle of 90 °, and a plurality of insulating materials for pressing and holding the coil ends of the first winding and the second winding. A columnar guide is provided on the tooth core, and a rising portion having a crossover holding groove is erected on the side opposite to the guide that holds the coil end of the first winding of the columnar guide. It is what

Action In the above structure, after winding the first winding, after winding one pole of the second winding and then winding the winding of the next pole, the crossover between the poles is guided by the first winding. Pass it through the crossover holding groove on the upper part of the rising part that is erected on the side opposite to the winding. As a result, the connecting wire is arranged at a position higher than the end surface of the tooth core.

Example An example of the present invention will be described below with reference to FIGS. 1 to 4.

In the drawing, reference numeral 1 denotes a tooth core, which has a rotor hole 2 into which a rotor (not shown) is inserted in an inner peripheral portion thereof, and an even number of tooth portions are radially provided on the outer periphery of the rotor hole 2. 1A and 1B are provided, and the outer peripheral tips of the tooth portions 1A and 1B are substantially T-shaped and are adjacent to each other through an opening 11 for winding the winding conductor. The tooth core 1 has both end surfaces covered with an insulating portion 12. The insulating portion 12 has the same plane shape as the tooth core 1, and has a ring-shaped rising portion 12A at the inner peripheral edge of the rotor hole 2. A columnar first winding guide for holding each of the first winding 3 and the second winding 4 at a position on the tooth portion 1B which is the center position when winding the winding conductor
6, a second winding guide 7 is formed, and a rising portion 9 having a groove 10 for holding the crossover wire 8 is provided on the side opposite to the winding of the first winding guide 6. Further, the first winding 3 is centered on the tooth portion 1B having the first winding guide 6, and the tooth portion adjacent to the tooth portion 1B.
The first winding 3 is wound over 1A, and the second winding 4 is wound at a position separated from the first winding 3 by an electrical angle of 90 °. After the winding is completed, the insulating wedge 5 is inserted into the opening 11 and the yoke core 13 is press-fitted onto the outer circumference of the tooth core 1.

In the above-mentioned configuration, the first portion is formed from the opening 11 of the tooth core 1
Following the winding 3, the second winding 4 is wound at a position separated by an electrical angle of 90 ° from this, but when the winding of one pole is finished and the winding of the next pole is started, the crossover wire 8 is erected. Pass it through the groove 10 above the lifting part 9. As a result, even if the insulating wedge 5 is inserted into the opening 11, the connecting wire 8 is located above, so that the connecting wire 8 does not get caught on the end portion of the insulating wedge 5.

EFFECTS OF THE INVENTION As is clear from the above description of the embodiment, in the present invention, the connecting wire of the second winding is held in the holding groove for the connecting wire at the upper part of the rising portion provided on the side opposite to the winding of the columnar guide. Therefore, even if the insulating wedge is inserted into the opening, it will not get caught, and the work of inserting the insulating wedge will be smooth, improving the work efficiency and the effect of improving the quality stability by reducing defective crossover wires. To be

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of an induction motor stator according to an embodiment of the present invention, FIG. 2 is a plan view showing a tooth core structure of the induction motor stator, and FIG. -O sectional view, 4th
FIG. 5 is a plan view showing the entire structure of the stator, FIG. 5 is a plan view showing a tooth core structure of a conventional induction motor stator, FIG. 6 is a sectional view taken along the line B--O of FIG. 5, and FIG. [Fig. 3] is a perspective view of a main part of the stator. 1 ... Tooth core, 3 ... 1st winding, 4 ... 2nd winding, 5
...... Insulating wedge, 6 ...... First winding guide, 7 ...... Second
Winding guide, 8 ... Crossover, 9 ... Start-up section, 10 ...
… Groove, 11 …… Opening, 12 …… Insulating part.

Claims (1)

[Claims] 1. A tooth core having radially a plurality of teeth around which a winding conductor is wound around a rotor hole into which a rotor is inserted, and an opening between the plurality of teeth. An insulating wedge, a yoke core that is press-fitted into the outer circumference of the tooth core, a first winding wound directly around the tooth core, and an electrical angle of 90 ° from the first winding. A plurality of columnar guides made of an insulating material that presses and holds the coil ends of the first and second windings on the tooth core, A stator of an induction motor in which a rising portion having a crossover holding groove is erected on a side opposite to a winding of a guide that holds a coil end of a first winding of the columnar guide.