JPH1146461A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize the magnetic flux generated from a stator, by providing a rotor formed by mechanically coupling an inner rotor arranged on opposite to teeth at the inner peripheral side of the stator, and an outer rotor arranged in opposite to teeth at the inner peripheral side of the stator. SOLUTION: A stator core 1 is constituted with a plurality of inner side teeth 3 extended radially toward the center of shaft from the inner peripheral side of a back yoke 2 formed to a cylindrical shape, and a plurality of outer side teeth 4 extended outwardly from the outer peripheral side of a back yoke 2 with teeth arranged on the same radial line as the teeth 3 at the inner side. The stator 5 comprises teeth of a stator core 1 and windings 6 wound around the back yoke 2 between teeth of the stator core 1. Also, at the inner peripheral side of the stator 5, an inner rotor 7 is arranged in opposite to the teeth 3 at the inner side, and the outer rotor 8 is arranged in opposite to the teeth at the outer side at the outer peripheral side of the stator 5. In this way, magnetic flux created by the stator 5 can be effectively utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor having a winding wound in a toroidal winding.

[0002]

2. Description of the Related Art The configuration of a conventional motor will be described with reference to FIG. 4 taking an induction motor as an example. FIG. 4 is a front view illustrating a positional relationship between a stator and a rotor of a conventional induction motor.

In FIG. 4, a stator core 31 is composed of a cylindrical back yoke 32 and a plurality of teeth 33 extending from the inner peripheral side of the back yoke 32 toward the center of the shaft.

[0004] The stator 34 includes a stator core 31 and windings 35 wound around the teeth 33 of the stator core 31. The winding 35 has several windings formed in a ring shape in advance, that is, an outer primary winding 35a, an outer secondary winding 35b wound outside the teeth 33,
Further, the inner primary winding 35c and the outer secondary winding 35d wound inside the teeth 33 are respectively inserted between arbitrary slots of the stator core 31.

[0005] The rotor 36 is composed of a shaft 37 and a rotor core 38 attached to and fixed to the outer periphery of the shaft 37, and is disposed on the inner peripheral side of the stator 34.

[0006]

In the conventional induction motor, in order to increase the torque, it is necessary to increase the magnetic flux density passing between the air gap between the inner peripheral surface of the stator and the outer peripheral surface of the rotor. If the excitation is increased to increase the magnetic flux density, the electromagnetic noise generated by the induction motor will increase,
Caused noise.

[0007]

Therefore, according to the present invention, a back yoke formed in a cylindrical shape and a plurality of teeth extending from both inner and outer peripheral sides of the back yoke are provided. A stator having a stator core formed and a winding wound around a back yoke of the stator core, and an adduction rotation arranged to face teeth on an inner peripheral side of the stator; And a rotor formed by mechanically coupling a rotor and an abduction rotor disposed so as to face teeth on the outer peripheral side of the stator. .

[0008]

The magnetic flux generated from the stator can be effectively utilized by providing teeth on the inner and outer peripheral sides of the stator core in which the windings are toroidally wound. By arranging the rotor on the inner peripheral side and the outer peripheral side of the child, the air gap area can be increased.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view illustrating a positional relationship between a stator and a rotor of an induction motor according to the present invention. FIG.
FIG. 2 is a partial sectional side view of an induction motor formed using a stator and a rotor arranged as in FIG. 1. FIG.
It is the front view explaining the positional relationship of the stator and the rotor of the DC motor in the present invention.

In FIG. 1, a stator core 1 includes a cylindrical back yoke 2 and a plurality of inner teeth 3 radially extending from the inner peripheral side of the back yoke 2 toward the axial center. , A plurality of outer teeth 4 extending radially outward from the outer peripheral side of the back yoke 2, each of which is arranged on the same radiation as the inner teeth 3.
It is composed of

The stator 5 includes a stator core 1 and a so-called toroidally wound winding 6 wound around the back yoke 2 between the teeth of the stator core 1.

An inner rotation rotor 7 is arranged on the inner peripheral side of the stator 5 so as to face the inner teeth 3, and on the outer peripheral side of the stator 5 so as to face the outer teeth 4. An abduction rotor 8 is provided.

Referring to FIG. 2, an example of an induction motor constituted by using a stator and a rotor arranged as shown in FIG. 1 will be described.

The rotor 9 is formed by mechanically connecting the respective end faces of the adduction rotor 7 and the abduction rotor 8 by a connection plate 10.

Further, by mounting bearings 12a and 12b on the inner peripheral surface of the adduction rotor 7 or via the ball housing 11 or the like, the rotor 9 becomes rotatable. The bearings 12 a and 12 b are fixed to the fixed bar 12 by press-fitting the fixed bars 12. Also,
The fixing rod 12 is attached to the flange plate 13.
Further, the stator 5 is also attached to the flange plate 13 via the collar 14 to adjust the air gap between the rotor 9 and the stator 5.

The connecting plate 10 is provided with an output shaft 15 extending in the axial direction, and forms an induction motor 16. Then, a belt 17 or the like is attached to the output shaft 15, and the induction motor 16 is attached to an arbitrary device (not shown).
Connect.

Referring to FIG. 3, a direct current rotor 20 and an external rotor 21 having permanent magnets 18 and 19 are used instead of the internal rotor 7 and the external rotor 8 described above, so that It can be configured as an electric motor 22. That is, the adduction rotor 20 provided with the permanent magnets 18 is disposed so that the inner teeth 3 and the permanent magnets 18 face each other, and the permanent magnets are provided such that the outer teeth 4 and the permanent magnets 19 face each other. What is necessary is just to provide the abduction rotor 21 provided with 19.

[0018]

According to the present invention, by arranging the rotor on the inner and outer circumferences of the stator, the magnetic flux generated from the stator can be effectively utilized.

The torque can be increased by mechanically connecting the rotors disposed on the inner and outer circumferences of the stator.

Further, since the air gap area can be increased, the magnetic flux density in the air gap can be reduced, and therefore the noise of the induction motor can be reduced.

[0021]

[Brief description of the drawings]

FIG. 1 is a front view illustrating a positional relationship between a stator and a rotor of an induction motor according to the present invention.

FIG. 2 is a partial side sectional view of an induction motor formed using a stator and a rotor arranged as in FIG. 1;

FIG. 3 is a front view illustrating a positional relationship between a stator and a rotor of the DC motor according to the present invention.

FIG. 4 is a front view illustrating a positional relationship between a stator and a rotor of a conventional induction motor.

[Explanation of symbols]

 1, 31 ... stator core 2, 32 ... back yoke 3 ... inner teeth 4 ... outer teeth 5, 34 ... stator 6, 35 ... winding 7, 20 ... adduction rotor 8, 21 ... abduction rotor 9 , 36 ... Rotor 10 ... Connection plate 11 ... Ball housing 12 ... Fixing rod 12a, 12b ... Bearing 13 ... Flange plate 14 ... Collar 15 ... Output shaft 16 ... Induction motor 17 ... Belt 18, 19 ... Permanent magnet 22 ... DC motor 33 ... teeth 35a ... outer primary winding 35b ... outer secondary winding 35c ... inner primary winding 35d ... inner secondary winding 37 ... shaft 38 ... rotor core

Claims (1)

[Claims] An electric motor having a winding wound in a toroidal winding, comprising: a back yoke formed in a cylindrical shape; and a plurality of teeth extending from both inner and outer sides of the back yoke. And a stator having a winding wound around a back yoke of the stator core, and an adduction disposed to face teeth on the inner peripheral side of the stator. An electric motor, comprising: a rotor formed by mechanically coupling a rotor and an external rotor arranged to face teeth on the outer peripheral side of the stator.