JP3344505B2 - 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 a method of winding stator windings.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a stator core of an eight-slot, two-pole capacitor induction motor has eight I-shaped teeth protruding radially inward on the inner periphery of the stator core. In the state where the parts are formed and laminated to a predetermined thickness, the inside of the slot is subjected to insulation treatment with insulating paper or the like, and as shown in FIG. A first outer winding is interposed between the teeth, and a second outer winding is wound thereon having three I-shaped teeth interposed therebetween. A stator is formed by winding a first inner winding with the teeth interposed therebetween and a second inner winding with the three I-shaped teeth interposed therebetween. In this case, the length of the coil of the outer winding is longer than the length of the coil of the inner winding, and it is necessary to combine the coil shapes with bind yarn to adjust the winding shape. Not only is the amount used too large, the primary resistance of the windings increases, and the performance of the motor deteriorates, but also the shaping and binding work of the windings hinders the winding process,
There is also a problem that the coil end becomes large and the size of the motor in the axial direction becomes large.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and to improve the performance by narrowing the coil circumference of the winding to shorten the length of the stator winding. Another object of the present invention is to provide a capacitor induction motor that does not require manual work such as binding and has a reduced axial dimension as much as possible.

[0004]

In order to achieve the above-mentioned object, the shape of the teeth protruding inward from the yoke forming the slot is set to two types of inverted U-shape and U-shape,
U-shaped, U-shaped, clockwise along the inner circumference of the stator core,
A first combination in which a reverse U-shape, a reverse U-shape is arranged circumferentially in the order, a reverse U-shape, a reverse U-shape on the left side, a U-shape on the right side, and a U-shape, and a left side on the left side U-shaped, U-shaped, inverted U-shaped on the right, and a second combination of inverted U-shaped
Winding the first outer winding between grooves near the outer periphery of the proximal end of adjacent inverted U-shaped and U-shaped teeth of the combination of
A second outer winding is wound between grooves near the outer periphery of the proximal end of the non-adjacent inverted U-shaped and U-shaped teeth at both ends, and then inverted with a second combination of adjacent U-shaped teeth. A first inner winding is wound between grooves near the inner periphery of the U-shape, and a second inner winding is wound between grooves near the inner periphery of the U-shape and the inverted U-shape that are not adjacent at both ends. I tried to wear it.

[0005]

According to the above construction, the teeth protruding inward from the yoke portion forming the slot are formed into two types, that is, an inverted U-shape and a U-shape, respectively, along the inner periphery of the stator core. C-shape, U-shape, inverted U-shape, and inverted U-shape are arranged in the circumferential direction in the clockwise direction to form an 8-slot tooth portion, and an inverted U-shape, an inverted U-shape, A first combination in which a U-shape and a U-shape are arranged on the right side and a second combination in which a U-shape, a U-shape and an inverted U-shape and an inverted U-shape are arranged on the left, First
Winding the first outer winding between grooves near the outer periphery of the proximal end of adjacent inverted U-shaped and U-shaped teeth of the combination of
A second outer winding is wound between grooves near the outer periphery of the proximal end of the non-adjacent inverted U-shaped and U-shaped teeth at both ends, and then inverted with a second combination of adjacent U-shaped teeth. A first inner winding is wound between grooves near the inner periphery of the U-shape, and a second inner winding is wound between grooves near the inner periphery of the U-shape and the inverted U-shape that are not adjacent at both ends. In this case, a two-pole stator winding is formed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a plan view of a stator core according to the present invention. The teeth of the stator core 1 have an inverted U-shape 4 and a U-shape, respectively, which protrude inward from a yoke 2 forming a groove 6. It is composed of two types of U-shaped 5 and is arranged in the circumferential direction in the order of U-shaped 5, U-shaped 5, inverted U-shaped 4, and inverted U-shaped 4 in the clockwise direction along the inner circumference of the stator core. To form an 8-slot tooth portion, and make the width of each tooth portion of the inverted U-shaped 4 and the U-shaped 5 equal to each other to equalize the density of magnetic flux flowing through each tooth,
A uniform magnetic pole is formed.

FIG. 2 shows a stator core according to the present invention in which stator windings are wound. Slots of the stator core 1 which are laminated and insulated in a groove 6 excluding the outer periphery are slotted on the left side. Mold 4, inverted U-shape 4, U-shaped 5 on the right, U-shaped 5 and a first combination, U-shaped 5, U-shaped 5 on the left, inverted U-shaped 4, right and inverted The coil is divided into the second combination in which the U-shape 4 is arranged, and the winding is formed between the groove 6 near the outer periphery of the base end 3 of the adjacent inverted U-shape 4 and the U-shape 5 of the first combination. A first outer winding 7 is wound by a winding machine, and a second winding is performed by a winding machine between grooves 6 near the outer periphery of the base end 3 of the inverted U-shaped 4 and the U-shaped teeth 5 which are not adjacent at both ends. , And then the second combination of adjacent U-shaped 5 and inverted U-shaped 4
The first inner winding 9 is wound between the groove portions 6 near the inner periphery of the U-shaped member, and the second inner winding wire 9 is provided between the groove portions 6 near the inner periphery of the U-shaped member 5 and the inverted U-shaped member 4 which are not adjacent at both ends. 10 is wound around each to form an 8-slot 2-pole stator. By winding the stator windings as described above, the first outer winding 7, the second outer winding 8, the first inner winding 9, and the second inner winding 10 are all the stator cores. The coil is wound closely so that the extra coil end can be prevented from protruding and the length of the coil can be shortened as much as possible, and the axial dimension after winding can be shortened. The manual work of binding can be omitted.

[0008]

As described above, in the present invention, the shape of the teeth protruding inward from the yoke portion of the stator core is made into two types of inverted U-shape and U-shape, respectively. C-shaped, U-shaped, inverted U-shaped, inverted U-shaped in the clockwise direction along the circumference, inverted C-shaped, inverted U-shaped on the left side,
A first combination in which a U-shape and a U-shape are arranged on the right side and a second combination in which a U-shape, a U-shape and an inverted U-shape and an inverted U-shape are arranged on the left, A first outer winding is wound between grooves near the outer periphery of the proximal end of the adjacent inverted U-shaped and U-shaped teeth of the first combination, and the non-adjacent inverted U-shaped and U-shaped ends are wound. A second outer winding is wound between grooves near the outer periphery of the proximal end of the U-shaped teeth, and then a second combination of adjacent U-shaped and inverted U-shaped grooves near the inner circumference. The first inner winding is wound around the inner winding, and the second inner winding is wound between grooves close to the inner periphery of the U-shaped and inverted U-shaped ends which are not adjacent to each other, thereby accommodating the stator winding. In addition to reducing the amount of copper wire used by shortening the coil circumference of each winding, reducing the primary resistance of the winding, improving the characteristics of the induction motor, and extending the coil end The by suppressing low, it is possible to shorten the axial size of the induction motor.

[Brief description of the drawings]

FIG. 1 is a plan view of a stator core according to the present invention.

FIG. 2 is a plan view showing a state where a winding is wound around a stator core of the present invention.

FIG. 3 is a plan view of a conventional stator core.

FIG. 4 is a plan view showing a state where a winding is wound around a conventional stator core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator core 2 Yoke part 3 Base end part of a tooth part 4 Reverse U-shape 5 U-shape 6 Groove part 7 1st outer winding 8 2nd outer winding 9 1st inner winding 10 2nd Inner winding 11 I-shaped tooth

──────────────────────────────────────────────────続 き Continued on the front page (72) Koji Mori, 1116 Suenaga, Takatsu-ku, Kawasaki City Inside Fujitsu General Co., Ltd. (72) Inventor Yuji Soma 1116, Suenaga, Takatsu-ku, Kawasaki City Fujitsu General Co., Ltd. 56) References JP-A-4-340349 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02K 17/08 H02K 1/16

Claims (2)

(57) [Claims] 1. A capacitor induction motor in which eight slots are formed inside a stator core and two-pole stator windings are wound in the slots. The shape of the teeth protruding from the stator is inverted U-shape and U-shape, respectively. Clockwise, U-shape, inverted U-shape, and inverted U-shape along the inner circumference of the stator core. A first combination in which a circular shape is arranged in the order of the molds, a reverse U-shape, a reverse U-shape, a U-shape, a U-shape on the right, and a U-shape, a U-shape on the left, Second with inverted U-shape and inverted U-shape on right side
The first outer winding is wound between the grooves near the outer periphery of the bases of the adjacent inverted U-shaped and U-shaped teeth of the first combination, and both ends are not adjacent to each other. The second between the grooves near the outer periphery of the base end of the inverted U-shaped and U-shaped teeth is
And then winding the first inner winding between adjacent second U-shaped and inverted U-shaped grooves of the second combination, and non-adjacent U-shaped at both ends. A capacitor induction motor characterized in that a second inner winding is wound between grooves near the inner periphery of a mold and an inverted U-shape. 2. Each of the teeth forming the slot is subjected to insulation treatment, and the first outer winding, the second outer winding, the first inner winding, and the second inner winding are passed through the slot openings. 2. The capacitor induction motor according to claim 1, wherein the motor is wound in the order of windings.