JPH04125050A - Induction motor - Google Patents

Abstract

PURPOSE:To obtain a small-sized induction motor, in which a winding, etc., are assembled easily and defectives are hardly generated and which is excellent characteristics, by providing a first winding section, in which a ring-shaped yoke section is formed to a core and which is extended from the yoke section to the radial direction, and a second winding section composed of three teeth sections in an E shape. CONSTITUTION:The outside of a core 1 is formed in a ring-shaped yoke section 2, a first winding section 3 is formed on the inside diameter side of the yoke section 2, and a second winding section 4 is formed in an E shape by three teeth sections 5a, 5b, 5c. A magnetic path section 9 is disposed in upright between winding sections 8, and the nose section of the magnetic path section 9 is formed in line with the teeth sections 5a, 5b, 5c and exposed, and faced oppositely to a rotor 10. The paths of magnetic flux generated from auxiliary windings 6a, 6b, 6c are shown in the arrows 11, a main winding 7 is wound between teeth sections 5a, 5d, and the paths of magnetic flud generated by the main winding 7 are shown in the arrows 12. When electricity is conducted through an auxiliary winding 6, magnetic flux having different phase at approximately 90 deg. is generated between the auxiliary winding 6 and the main winding 7, and the rotor 10 can be turned.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an induction motor having a structure in which winding is easy and winding ends are small.

[Prior Art] An induction motor having a main winding and an auxiliary winding has a ring-shaped iron core with a large number of teeth extending therethrough, and the auxiliary winding and the main winding are inserted into slots formed between the teeth. The first and second windings forming the first and second windings are individually housed.

In such a configuration, each winding cannot be wound between adjacent slots due to the relationship forming the rotating magnetic field of the induction motor, and the slots to which one winding is installed are spaced apart. There will be.

Therefore, both the main winding and the auxiliary winding have long winding end portions extending between the spaced apart slots, which makes the winding portion extremely large.

In addition, there is a method in which the iron core is wound around an adjacent slot, but this deteriorates the utilization efficiency of the iron core.

[Problems to be solved by the invention] Such a winding end is not only electrically ineffective, but also generates heat due to resistance loss, and since it usually occupies half of the winding, material costs and weight are reduced. , and furthermore, it had the problem of worsening the space factor.

These problems arise when forming a small induction motor.
It has a large negative impact on the equipment used, for example, it obstructs the ventilation path of the ventilation fan, reducing the air volume, creating turbulence, causing noise, and causing problems such as increasing the size of the equipment as a whole. Was.

On the other hand, in manufacturing processes such as assembly, the ends of the winding become longer, which increases the defective rate due to the material of the winding.
Further, when the wire is placed in the slot, it is easily damaged and defective, and furthermore, the ends of the winding must be shaped, which requires time and effort and increases the chances that the winding will be damaged.

Such manufacturing defects require frequent repairs, requiring excessive quality control.

In order to solve this problem, an induction motor has been proposed in which the yoke is wound in a toroidal manner.

However, in this case, the winding could not be wound unless the ring-shaped yoke part was divided, so it was not easy to manufacture.

In particular, if the yoke is divided and wound, and then joined at the divided parts, resistance will be created in the magnetic path and the magnetic flux will be disturbed.Furthermore, the iron core will vibrate, causing problems such as noise. There were problems such as causing

The present invention was made in view of these circumstances, and
The purpose of the present invention is to provide an induction motor that is small in size, easy to assemble windings, etc., has few defects, and has good characteristics.

[Means for Solving the Problems] The present invention provides a ring-shaped yoke portion formed in the iron core, a first winding portion extending radially from the yoke portion, and a first winding portion extending from the ring-shaped yoke portion in the radial direction. a second winding part consisting of three tooth parts in a figure 8 shape formed at the end of the yoke, and a plurality of the integrated winding parts are arranged in a row in the circumferential direction of the yoke part, and A magnetic path section extending from the yoke is provided upright between the winding sections provided, and the first winding section is provided adjacent to a side tooth section forming a first winding and a second winding section. The problem is solved by winding the second winding between the teeth on the side of the winding.

[Function] The auxiliary winding wound on the first winding part of the iron core is a part that protrudes in the radial direction from the ring-shaped yoke part, and the auxiliary winding wound on this part is spaced apart. This is completely different from the conventional method that spans the slot, and the end of the winding becomes very small.

Furthermore, since the main winding is wound between the second winding part and the adjacent second winding part, the ends of the winding are also very close to each other. few.

If a capacitor is connected to the first winding section as an auxiliary winding and the second winding section is connected to a power source as a main winding, the motor operates as an induction motor.

Of course, the same effect can be obtained even if the first winding section is used as the main winding and the second winding section is used as the auxiliary winding.

[Example] The present invention will be described based on an example shown in the drawings. Fig. 1 is a diagram showing the relationship between an iron core and a winding of an induction motor according to an example of the invention. FIG. 2 is a perspective view of an iron core provided with windings.

In FIG. 1, the induction motor includes a ring-shaped yoke 2 on the outside of an iron core 1, and a first winding 3 extending radially on the inner diameter side of the yoke 2. has been done.

A second winding part 4 having a figure 8 shape and consisting of three teeth is formed at the inner end of the first winding part 3 to form a winding part 8 .

The second winding part 4 is formed in a figure eight shape by three tooth parts 5a, 5b, and 5C, and these first winding part 3 and the second winding part
The winding part 4 is integrated with a plurality of slots to form a plurality of slots, each of which houses an auxiliary winding 6 as a first winding and a main winding 7 as a second winding. Six pieces are arranged in a row on the inner peripheral side of the iron part 2.

Further, a magnetic path portion 9 is provided upright between the winding portions 8 adjacent to each other on the inner diameter side of the yoke portion 2, and its tip portion is connected to the tooth portions 5a, 5.
It is exposed to the inner diameter side in an orderly manner along with b and 5C, and faces the rotor 10.

In this embodiment, an induction motor having six poles consisting of twelve windings is shown, but only half of the windings are shown in the drawing.

The auxiliary winding 6 includes a series of 6a, 6b, and 6c, and the path of the magnetic flux generated therefrom is indicated by an arrow 11 in the figure.

Further, the main winding 7 is wound between adjacent toothed portions 5C15d, and the path of the magnetic flux generated therefrom is indicated by an arrow 12 in the figure.

Further, a rotor 10 is provided on the inner diameter side, and is supported by a frame (not shown).

In FIG. 2, the iron core 1 on which the main winding 7 and the auxiliary winding 6 are wound has a yoke part 2 exposed to the outside and laminated to form a donut shape, with both ends in the axial direction Auxiliary winding 6
and the main winding 7 is exposed.

The iron core 1 has a frame (not shown) formed thereon to support the rotor 10.

Also, among the six magnetic path sections formed, only one is marked with a lead line, and the other magnetic path sections without codes are similar magnetic path sections, and other magnetic path sections such as the first winding section 3, etc. Similarly, although only some of the parts are labeled, they are similar.

In such a configuration, the induction motor is manufactured by punching a steel plate with a press to form a yoke portion 2, a first winding portion 3, and a second winding portion 4 having an E-shape, and further laminating them to form a donut-shaped iron core. 1, and first wind the auxiliary winding 6 around the first winding part 3.

The winding of this auxiliary winding I16 is carried out using a winding machine that can pull out the winding from a nozzle. The auxiliary winding 6 is formed by winding a winding around the wire portion 3.

And a supplementary volume! 16 is wound around the first winding part 3,
A series of auxiliary windings 6a, 6b, and 6c are wound, and the main winding 7 is further wound around the second winding portion 4 on the inner diameter side.

When the auxiliary winding 6 and the main winding 7 are wound in this manner, the ends of each winding are pulled out and connected to a lead wire (not shown) so that electricity can be supplied.

Then, when a capacitor (not shown) is connected in series to the auxiliary winding 6 and energized, magnetic flux with a phase difference of approximately 90° is generated between the auxiliary winding 6 and the main winding 7, causing the rotor 10 to rotate. I can do it.

When forming a frame on such an iron core 1, the frame can be formed compactly by molding using a premix.

And, the molding by Brimix was applied for in 1973.
3-118368, JP-A No. 52-41810, JP-A-54-31504, etc. may be used.

Of course, it is easy to use a steel plate frame, and in that case, it can be easily implemented by fitting it to the outer peripheral side of the iron core 1.

Also, in this example, 6 [i is used, but 4 or 8
It goes without saying that this can be done in the same way at the poles as well.

[Effects of the Invention] According to the present invention, when the auxiliary winding and the main winding are wound around the core, the ends of the windings become extremely small, and when the output is 25 W and the core has a laminated thickness of 25 mm, the winding ends are extremely small compared to the conventional core. By comparison, the amount of copper wire is reduced by approximately 0%.

The effect obtained by this is that copper loss is reduced, the amount of heat generated is reduced, and an extremely small induction motor can be formed like a motor having toroidal windings on the yoke.

In addition, the auxiliary winding and the main winding can be wound without dividing the iron core, and a quiet and highly efficient induction motor with less uneven magnetic resistance and no vibration can be obtained. The effects are extremely significant industrially.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the relationship between an iron core and windings of an induction motor according to an embodiment of the present invention, and FIG. 2 is a perspective view of the iron core provided with windings. DESCRIPTION OF SYMBOLS 1... Iron core, 2... Yoke part, 3... First winding part, 4... Second winding part, 6... Auxiliary winding, 7.
...Main winding, 10...Rotor.

Claims (1)

[Claims] In an induction motor that has a first winding and a second winding on an iron core,
A ring-shaped yoke is formed on the iron core, a first winding part extends radially from the yoke, and three E-shaped yoke parts are formed at the ends of the first winding part. a second winding part consisting of a toothed part, and a plurality of the integrated winding parts are arranged in a circumferential direction of the yoke part, and extend from the yoke between the consecutively arranged winding parts. A magnetic path section is erected between the teeth on the side forming the first winding and the second winding in the first winding and the teeth on the side of the adjacent winding. An induction motor characterized by being equipped with a second winding.