JP3196879B2 - Capacitor induction motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor induction motor, and more particularly, to a configuration of a stator core and winding of a winding on the stator core.

[0002]

2. Description of the Related Art A conventional 24-slot 6-pole capacitor induction motor will be described in detail with reference to FIGS. As shown in FIG. 5, the yoke portions 2 to 12 of the stator core 1
A plurality of I-shaped teeth 3 are protruded at equal intervals, and L-shaped teeth 4 and inverted L-shaped teeth are provided on both sides of the base end of every other I-shaped teeth 3. The inner and outer grooves 6c and 6d and the inner and outer grooves 6a and 6d are provided on the inside and outside of the L-shaped teeth 4 and the inverted L-shaped teeth 5, respectively. 6b to form a stator iron core 1 having 24 slots.

The outer winding 7 is wound between the adjacent outer groove 6b and the outer groove 6d, and the inner winding 8 is wound around the adjacent inner groove 6a.
And the inner groove 6c, and the speed reduction winding 9 is further wound around the inner winding 8 to form a stator.

[0004] In the stator configured as described above,
As shown in FIG. 4, since the area A of the winding space of the inner groove is equal to the area B of the winding space of the outer groove, the reduction winding is wound on the inner winding. When the mounting method is adopted, the space factor of the inner winding is reduced, and as a result, the input voltage is increased, and the efficiency may be reduced.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and enables a reduction winding to be wound without reducing the space factor of an inner winding of a capacitor induction motor. It is an object of the present invention to provide a capacitor induction motor with improved efficiency.

[0006]

In order to achieve the above object, I-shaped teeth are protruded from the yoke of the stator core at equal intervals, and every other I-shaped tooth is provided. On both sides from the base end of
The L-shaped tooth portion and the inverted L-shaped tooth portion are protruded so as to be symmetrical left and right, and the inner groove and the outer groove are respectively formed inside and outside the L-shaped tooth portion and the inverted L-shaped tooth portion. Forming a groove, winding the outer winding between the outer groove and the next outer groove, winding the inner winding between the inner groove and the next inner groove, and winding the reduction winding into the inner winding; In a capacitor induction motor wound around a wire, the inner groove side of the L-shaped tooth portion and the inverted L-shaped tooth portion is cut to reduce the area of the winding space of the inner groove. The groove is formed to be wider than the area of the winding space.

[0007] The ratio of the area of the winding space of the inner groove to the area of the winding space of the outer groove is determined by the sum of the number of turns of the inner winding and the reduction winding, and the number of turns of the outer winding. Is characterized by being equal to the ratio of

[0009]

According to the above construction, I-shaped teeth are protruded from the yoke of the stator core at equal intervals, and the I-shaped teeth are disposed on both sides from the base end of every other tooth. The L-shaped tooth portion and the inverted L-shaped tooth portion are protruded so as to be symmetrical left and right, and the inner groove and the outer groove are respectively formed inside and outside the L-shaped tooth portion and the inverted L-shaped tooth portion. Forming a groove, winding the outer winding between the outer groove and the next outer groove, winding the inner winding between the inner groove and the next inner groove, and winding the reduction winding into the inner winding; In a capacitor induction motor wound around a wire, the inner groove side of the L-shaped tooth portion and the inverted L-shaped tooth portion is cut to reduce the area of the winding space of the inner groove. Formed wider than the area of the groove winding space,
Then, the ratio of the area of the winding space of the inner groove to the area of the winding space of the outer groove is defined as the ratio of the sum of the number of turns of the inner winding and the reduction winding to the number of turns of the outer winding. Therefore, the speed reduction winding can be wound without reducing the space factor of the inner winding of the capacitor induction motor.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same parts as in the conventional example. An embodiment of the present invention will be described in detail with reference to the accompanying drawings with respect to a 24-slot 6-pole capacitor induction motor.

FIG. 1 is a plan view of the stator core. Twelve I-shaped teeth 3 protrude from the yoke 2 of the stator core 1 at equal intervals. An L-shaped tooth 4 and an inverted L-shaped tooth 5 are provided on both sides of the base end 3a of the I-shaped tooth 3 so as to be symmetrical. Inner grooves 6c are provided inside and outside the L-shaped tooth portion 4 and the inverted L-shaped tooth portion 5, respectively.
And an outer groove 6d, and an inner groove 6a and an outer groove 6b, thereby forming a stator iron core 1 having 24 slots.

FIG. 2 is a plan view showing a winding state of the winding around the stator core. Outer groove 6d adjacent to outer winding 7
And the inner groove 8 is wound between the inner groove 6 and the outer groove 6b.
a between the inner groove 6c and the inner groove 6c, and furthermore, the reduction winding 9 is wound around the inner winding 8 so as to constitute a stator of the capacitor induction motor.

Here, the inner groove 6a is formed by cutting the inside of the tooth portion 5 as shown by a solid line from the conventional inner groove shown by a dotted line in FIG. It is configured to be wider than the area B of the winding space of the groove 6b. The same applies to the inner groove 6c.

In this case, the ratio between the area A of the winding space of the inner grooves 6a and 6c and the area B of the winding space of the outer grooves 6b and 6d is determined by the ratio between the inner winding 8 and the speed reduction winding 9 respectively. And the number of turns of the outer winding 7 is preferably equal to the ratio of the number of turns. Further, each tooth forming the inner groove and the outer groove is subjected to insulation treatment.

[0015]

As described above, in the present invention, I-shaped teeth are protruded at equal intervals from the yoke of the stator core, and every other base end of the I-shaped teeth is provided. On both sides, an L-shaped tooth portion and an inverted L-shaped tooth portion are protruded so as to be symmetrical left and right, and respectively inside and outside the L-shaped tooth portion and the inverted L-shaped tooth portion. Forming an inner groove and an outer groove, winding the outer winding between the outer groove and the next outer groove, winding the inner winding between the inner groove and the next inner groove, Is wound on the inner winding in such a manner that the inner groove side of the L-shaped tooth portion and the inverted L-shaped tooth portion is cut to reduce the winding space of the inner groove. The area is formed to be larger than the area of the winding space of the outer groove, and the ratio of the area of the winding space of the inner groove to the area of the winding space of the outer groove is defined by the inner winding and the speed reduction winding. Line The ratio of the number of turns to the number of turns of the outer winding is equal to the ratio of the number of turns of the outer winding, and the teeth are each insulated, so that the speed is reduced without reducing the space factor of the inner winding of the capacitor induction motor. The winding can be wound, and as a result, a capacitor induction motor with improved efficiency without increasing the input voltage can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a stator core of a capacitor induction motor of the present invention.

FIG. 2 is a plan view of one embodiment showing a winding state of a stator winding by the capacitor induction motor of the present invention.

FIG. 3 is an enlarged view of a main part of a stator core of one embodiment showing a capacitor induction motor of the present invention.

FIG. 4 is an enlarged view of a main part of a stator core of an embodiment using a conventional capacitor induction motor.

FIG. 5 is a plan view of an embodiment showing a winding state of a stator winding by a conventional capacitor induction motor.

[Description of Signs] 1 Stator core 2 Yoke 3 I-shaped tooth 3a Base end of I-shaped tooth 4 L-shaped tooth 5 Inverted L-shaped tooth 6a Internal groove 6b Outside Groove 6c Inner groove 6d Outer groove 7 Outer winding 8 Inner winding 9 Reduction winding A Area of inner groove winding space B Area of outer groove winding space

Claims (2)

(57) [Claims] An I-shaped tooth protrudes from the yoke portion of the stator core at equal intervals, and L-shaped teeth are provided on both sides from the base end of every other I -shaped tooth. Parts and inverted L-shaped teeth are symmetrical
So as to protrude, following the L-shaped teeth and inverted L-shaped teeth <br/> the inner and outer respectively inner grooves, to form the outer groove, the outer winding from said outer groove Wound between the outer grooves, the inner winding is wound between the inner groove from the inner groove to the next inner groove, in a capacitor induction motor obtained by winding a reduction winding over the inner winding. Previous
Cut the inner groove side of the L-shaped tooth and the inverted L-shaped tooth
Capacitor induction motor, characterized by comprising the area of the winding space of the groove formed wider than the area of the winding space of the outer groove by. 2. The ratio of the area of the winding space of the inner groove to the area of the winding space of the outer groove is determined by the sum of the number of turns of the inner winding and the reduction winding, and the number of turns of the outer winding. 2. The capacitor induction motor according to claim 1, wherein the ratio is equal to the ratio.