JP2809326B2 - 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 structure 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 a 24-slot 4-pole capacitor induction motor has radially outwardly connected inner peripheral edges of toothed cores by bridging portions having a predetermined width. The protruding 24 teeth are formed, and the teeth are inserted into the yoke core at the tip of the teeth to be connected and integrated. The tooth cores are laminated to a predetermined thickness, and the entire core is insulated except for the connection with the yoke cores. As shown in FIG. A large coil is coaxially wound at 5 slot pitch, an auxiliary winding is wound on the inner side, and a stator winding is wound on the outer side shifted by 45 degrees in the order of the main winding. The stator is configured by being fitted into and engaged with the yoke core. In this case, when winding around the tooth core, it is necessary to bind the inner winding after winding the inner winding, adjust the shape of the winding, and then wind the outer winding. Is an obstacle in the winding process. In addition, the coil diameter of the winding increases in the outer circumferential direction, the length of the winding increases, the amount of copper wire used increases, the primary resistance increases, the performance of the motor decreases, and the shape of the winding is reduced. For this reason, there are problems such as an increase in the coil end and an increase in the axial size of the motor.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has been made to improve the performance by reducing the coil diameter of the winding and shortening the length of the stator winding.
An object of the present invention is to provide a capacitor induction motor having a reduced axial dimension that does not require manual work such as binding.

[0004]

In order to achieve the above-mentioned object, the teeth of the tooth core are formed into three types of S-shape, I-shape, and inverted S-shape. A first combination in which an inverted S-shape is arranged on one side and an S-shape is arranged on the other side, and a second combination in which an S-shape is arranged on one side and an inverted S-shape is arranged on the other side around the I-shape Circumferentially arranged alternately, the inner peripheral edges of which are connected by a bridging portion of a predetermined width to form a 24-slot tooth core, and the second combination of S-shaped and inverted S-shaped inner circumferences The small coil of the inner winding is provided between the grooves close to the inside, and the large coil of the inner winding is provided between the grooves close to the inner periphery of the outer S-shaped and inverted S-shaped, and the inverted S-shaped of the first combination. The small coil of the outer winding is wound between the grooves near the outer periphery of the S-shape, and the large coil of the outer winding is wound between the grooves near the inner periphery of the inverted S-shape and the S-shape outside. did.

[0005]

According to the above construction, the teeth of the tooth core are formed into three types of inverted S-shape, I-shape, and S-shape, and the inverted S-shape is formed on one side around the I-shape. A first combination in which an S-shape is arranged on the other side, and a second combination in which an S-shape is arranged on one side and an inverted S-shape is arranged on the other side around the I-shape are alternately arranged circumferentially. The inner peripheral edge portion is connected by a bridging portion having a predetermined width to form a 24-slot tooth core, and the second combination and the outer S-shaped and inverted S-shaped groove portions near the inner periphery are formed. Connect the inner winding to the first
By winding the outer winding in a groove near the outer periphery of the inverted S-shape and the S-shape on the outer side, the coil diameter of each winding can be narrowed and the length of the winding can be shortened. . Also, winding the winding in the groove eliminates the protrusion of the winding, eliminating the need to reshape the shape of the inner winding after winding the inner winding and then winding the outer winding. The protrusion of the coil end portion is also reduced, and the axial dimension of the motor can be shortened.

[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, in which a tooth core 2 has an I-shape 4 projecting radially outward, a groove 7 opening rightward on the outer peripheral side, and a groove 7 opening leftward on the inner peripheral side. And a reverse S-shape 6 having a groove 7 opening to the left on the outer periphery and a groove 7 opening to the right on the inner periphery. A first combination in which an S-shape is arranged on the right side of the character and a second combination in which an S-shape is arranged on the left and an inverted S-shape on the right around the I-shape are alternately arranged circumferentially. The inner peripheral edge portion is connected by a bridging portion 1 having a predetermined width to form a tooth core 2 having 24 slots, which is fitted inside the yoke core 3.

As shown in FIG. 2, when the inside winding 8 is wound, the inside of the first combination of the inverted S-shaped and the groove 7 near the inner periphery of the S-shaped at a three-slot pitch is formed. The small coil 8a of the winding 8 is connected to the large coil 8b of the inner winding 8 at a pitch of 5 slots between the outer inverted S-shape and the groove 7 near the inner periphery of the S-shape. The small coil 9a of the outer winding 9 is inserted between the grooves 7 near the inner periphery of the S-shape and the inverted S-shape at a 3-slot pitch between the inverted S-shaped outside and the groove 7 near the outer periphery of the S-shape. Each of the large coils 9b of the outer winding 8 is wound at a pitch of 5 slots. Furthermore, S
The widths of the teeth of the V-shape 5 and the inverted S-shape 6 are made equal to the width of the I-shape teeth 4 so that the density of the magnetic flux flowing through each tooth becomes uniform. To form a uniform magnetic pole.

[0008]

As described above, in the present invention, the teeth of the tooth core are formed into three types of inverted S-shape, I-shape, and S-shape. A first combination in which an S-shape is arranged on the other side in the S-shape and a second combination in which an S-shape is arranged on one side and an inverted S-shape on the other side, centering on the I-shape, Are alternately arranged, and the inner peripheral edges thereof are connected by a bridging portion of a predetermined width to form a 24-slot tooth core. The second combination and the outer periphery of the S-shaped and inverted S-shaped inner cores In the groove close to the inner winding, the first combination of its outer inverted S-shaped and S
By winding the outer winding in the groove near the outer periphery of the U-shape, the storage capacity of the winding is improved, the coil diameter of each winding is narrowed, the amount of copper wire used is reduced, and the primary winding is The resistance can be reduced, the characteristics of the induction motor can be improved, the protrusion of the coil end can be kept low, and the size of the induction motor in the axial direction can be shortened.

[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 Bridge part 2 Tooth core 3 Yoke core 4 I-shaped tooth part 5 S-shaped tooth part 6 Reverse S-shaped tooth part 7 Groove part 8 Inner winding 9 Outer winding

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yuji Kawai 1116 Suenaga, Takatsu-ku, Kawasaki City Inside Fujitsu General Co., Ltd. (72) Inventor Koji Mori 1116, Suenaga, Takatsu-ku Kawasaki City Examination within Fujitsu General Co., Ltd. Government Takeshi Yoneyama (56) References JP-A-6-22514 (JP, A) JP-A-5-83907 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02K 17/08 H02K 1/16 H02K 3/28

Claims (1)

(57) [Claims] 1. A 24-slot 4-pole capacitor induction motor having a stator core consisting of a tooth core and a yoke core fitted around the tooth core, wherein the tooth of the tooth core has an S shape. A first combination of an I-shape and an inverted S-shape, with an inverted S-shape on one side around the I-shape and an S-shape on the other side, and one side around the I-shape A second combination in which an S-shape is arranged on the other side and an inverted S-shape is arranged on the other side is alternately arranged circumferentially,
The inner peripheral edges are connected by a bridging portion of a predetermined width to form a 24-slot tooth core, and the inner winding is formed between the S-shaped and inverted S-shaped grooves near the inner periphery of the second combination. Small coil,
The large coil of the inner winding is inserted between the outer S-shaped groove and the inverted S-shaped groove near the inner periphery, and the outer winding is inserted between the inverted S-shaped and the S-shaped groove near the outer periphery of the first combination. Wherein the large coil of the outer winding is wound around the outer small S-shaped groove between the inverted S-shaped and the S-shaped groove on the outside.