JPS58215962A - Stator for rotary electric machine - Google Patents

Abstract

PURPOSE:To simplify the winding work of a stator for a rotary electric machine by providing a concentric coil and toroidal coil on a stator. CONSTITUTION:A main coil 5 is wound on split stator cores 2, 3 split from a stator core in a toroidal shape, an auxiliary coil 6 of concentric coil which is separately wound is inserted from the split surface 13 side into a slot 2a, and the coil 5 is retained from upside. Subsequently, the cores 2, 3 are bonded at the split surfaces 13, and the entire stator core is molded with resin fixedly. In this manner, since the coil 6 is mounted from the spit surfaces 13 of the cores 2, 3, the winding work can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stator in a rotating electrical machine such as an induction motor, which includes concentric windings and toroidal windings.

The annular stator core of a conventional induction motor is provided with concentric windings arranged radially along the inner diameter of a plurality of slots and wound between adjacent slots. In order to install this concentric winding, the concentric winding is wound concentrically in advance to form a concentric winding, and then the concentric winding is inserted into the slot from the inner diameter side of the stator core, which is a relatively difficult process. In order to facilitate this, the concentric winding is made much longer than the winding circumference required for the motor's characteristics. therefore,
Winding resistance increases and copper loss increases, deteriorating motor characteristics.Also, from a magnetic point of view, the space factor of the coil end protruding toward the axial end face of the stator core, which is unrelated to motor characteristics, increases. This was an obstacle to making the motor thinner.

Further, the required weight of the winding wire becomes large, which results in a disadvantage to resource conservation.

One possible solution to the problem of stators with concentric windings is to provide them with toroidal windings. That is, as shown in FIG. 1, the 16-slot, two-pole stator core 1 is divided into two equal parts, and the yoke part 4 is wound in a toroidal shape around each slot 2a, 3 of the split stator core 2, 3. Winding 5. The winding that forms the auxiliary winding 6 is finished. Then, as shown in FIG. 2, the winding nA having four terminals is connected to the winding group BK having Harney terminals, and similarly to the terminal H.

Also connected are winding groups C1D each having a torch.

By doing this, the required length of the winding a5 is shorter than that of a concentric winding because it protrudes less into the axial end faces of the split stator cores 2 and 3, and The thickness of the material can also be reduced.

However, as shown in FIG. 2, there are six connection points 8, and the main winding 6. has an auxiliary winding 6 □ and 3
In the motor for which the speed tap is derived, there are nine connection points 8.

Furthermore, as shown in FIG. 4, the main winding 5. In the example of a 4-pole motor with 16 slots consisting of auxiliary windings 6, if the motor has concentric windings, one winding would be inserted across two slots, so there would be 4 main windings 6 and 4 auxiliary windings. The motor with the above-mentioned toroidal winding as shown in Fig. 5 has a total of 8 main windings 5 and 8 auxiliary windings 6. The number of windings is 16, and n windings (the number of windings in the concentric winding) x 2 are required. In the figure, 9 and 10 are 1 of each winding 5 and 6, (
(11 is a slot) indicates the winding direction of each 112tri winding.

The present invention aims to solve the above-mentioned problems of the conventional example by providing an inexpensive and thin motor that is equipped with a combination of concentric windings and toroidal windings.

An embodiment of the present invention will be described below with reference to the drawings.

The same parts as the above conventional example are given the same drawing numbers and the explanation is omitted, and the explanation will be focused on the different parts. The toroidal winding and the auxiliary winding 6 are concentric windings, and there are 8 main windings 15 and 6 auxiliary windings and 4 auxiliary windings, resulting in a total of 112 windings. Therefore, the number of windings is i'112, which is more than in the case of the concentric winding shown in FIG. 4 but less than in the case of the toroidal winding shown in FIG.

Figure 7 shows an example of a 16-slot, 2-pole motor.The stator core is divided into two halves, and the main winding 5 is wound in a toroidal shape around the stator cores 2 and 3. concentric
Dividing interest #1 to the auxiliary winding 6'f slots 2a and 3a of the winding
13 Insert it across the chest and press it down from the top of the main winding 5 gold. Thereafter, the divided stator cores 2 and 3 are joined at the dividing surface 13, and the entire stator core is fixed by resin molding or the like. In the circuit diagram of Fig. 8 I''i, there are four connection points 8 for each winding, and as shown in Fig. 9, the auxiliary winding 6
Even with a 3-speed motor that guides the two tags from above, there are six locations.

Therefore, since the auxiliary winding 6 is installed from the side of the split surface 3 of the split stator core by 2° and 30 minutes, the work is easier than before, and winding can be performed using the minimum necessary winding frame size. Furthermore, the number of connection points 8 can be reduced compared to the case where only toroidal windings or concentric windings are used.

FIG. 10 shows another embodiment of the present invention in which the auxiliary winding 6, which is a concentric winding, is applied to the slots of the divided stator core 2 from the dividing surface 13 side, and then the main winding 6, which is a toroidal winding, is auxiliary. It is applied over the winding 6 to prevent the winding of the auxiliary winding 6 from unraveling.

The present invention was implemented with 16 slots and 2 poles.

According to a trial calculation of the stator core's stacked thickness of 33wn, inner diameter of 61mm, and outer diameter of 125mm, a 10% increase in starting torque can be obtained compared to the case where only concentric windings are used.

That is, if the above-mentioned lamination thickness is forged, the resistance value of the main winding 5 will be smaller than that of a concentric winding. In addition, when the resistance value of the auxiliary winding 6 is the same as that of the concentric winding, and the starting torque T
s is the main winding current M, the auxiliary winding current IA, and the main winding and auxiliary current IM.

When the phase angle to I becomes T SO'-I MX I p, (about 10%).

As described above, according to the present invention, the number of winding wires and their connections is reduced, which greatly simplifies the winding work. Further, each of the toroidal and concentric windings can prevent one winding from unraveling the other, and the work can be simple and easy without requiring any special winding unraveling means.

[Brief explanation of the drawing]

Figure 1 is a plan view of a split stator core with toroidal winding of a conventional example, Figure 2 is a circuit diagram of the same, and Figure 3 has a three-speed tap. Figure 5 is a developed view of the stator windings of the same winding and toroidal winding in the conventional example, and Figure 6 is a developed view of the stator winding employing an embodiment of the present invention. Fig. 7 is a plan view of the stator core, Fig. 8 is the circuit diagram of Fig. 7, and Fig. 9 is an rc circuit diagram of an ID3 speed motor employing an embodiment of the present invention. Half view of split stator core in other embodiments, 1st
1 and 12 are current vector diagrams of the main winding and the auxiliary winding of the conventional example and the present invention. 2.3...Split stator core, 6...Main winding (toroidal winding), 6...Auxiliary winding break (concentric winding edge). Name of agent: Patent attorney Toshio Nakao and one other person Figure 2 Figure 3 Figure 4 Figure 7 Figure 8 WJ9 Figure 11 -

Claims (1)

[Scope of Claims] A stator for a rotating electric machine, which is equipped with a toroidal winding, which is provided and a yoke part is wound in a toroidal shape, and a concentric winding, which is provided in the slots of the split stator core. (2) After the above-mentioned concentric winding is applied. A stator for a rotating electrical machine according to claim 1, which has a toroidal winding wound thereon. A stator for a rotating electric machine according to item 1.