JPH0543785U - Variable air gap type motor - Google Patents

Abstract

(57) [Summary] [Purpose] While obtaining static torque with a permanent magnet,
It is an object of the present invention to provide a variable air gap type motor capable of effectively utilizing the magnetic force of this permanent magnet. [Arrangement] The magnetic pole 3 of the electromagnet is annularly arranged on the frame 5 via the permanent magnet 11, and as a result, the magnetic pole 3 is formed.
The magnetic force of the permanent magnet 11 which obtains the stationary torque by alternately changing the polarity of the magnetic field in the circumferential direction can also be used as the magnetic force for obtaining the rotational torque.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention relates to a variable air gap type motor, which is useful when applied to the purpose of obtaining low speed and high torque.

[0002]

[Prior Art]

 A variable air gap motor that obtains low speed and high torque is equipped with a plate-shaped rotor that is rotatable and swingable with respect to a stator in which multiple electromagnets are annularly arranged around it. The magnetic attraction force on the rotor side is moved in order, and the rotor is rotated (rotated) little by little in the direction opposite to the excitation direction of the electromagnet of the stator at a ratio generated based on the diameter difference between the rotor and the stator. It is composed.

More specifically, as shown in FIGS. 2A to 2D, the electromagnet 2 forming the stator 1 is formed by winding a winding 4 around a magnetic pole 3 which is a fan-shaped block, A plurality of them (six in this example) are arranged on the frame 5 forming the stator 1. As a result, the arrangement of the electromagnets 2 in this example is as shown in FIG.

The disc-shaped rotor 6 is supported by a shaft 8 at the center of the stator 1 via a universal joint 7, and the center of the frame 1 is rotated / swinged in accordance with the excitation of the electromagnet 2. As it swings, it comes into contact with the lining 9 which is attached to the upper edge of the frame 5 in an annular shape, and rotates in the direction opposite to the excitation direction of the electromagnet 2.

At this time, a square wave voltage as shown in FIG. 3B is applied to each electromagnet 2. The reference numerals # 1 to # 6 of the electromagnet 2 shown in FIG. 3A correspond to # 1 to # 6 of FIG. 3B.

[0006]

In the variable air gap type motor according to the prior art as described above, the stator 1 is composed of the electromagnet 2 and the frame 5, so that when the stationary torque is obtained, the winding 4 is It is necessary to keep the current flowing.

Therefore, as shown in FIGS. 4A and 4B, the electromagnet 2 is annularly arranged on the ring-shaped permanent magnet 10 and is arranged on the frame 5 via the permanent magnet 10. A variable space type motor has been proposed. According to this variable air gap type motor, static torque can be obtained by the magnetic force of the permanent magnet 10.

However, since the magnetic force of the permanent magnet 10 is always acting, the magnetic force of the electromagnet 2 may be weakened when the winding 4 is energized depending on the electromagnet 2, that is, the direction of the current flowing through the winding 4. Will generate a strong magnetic flux.

In view of the above-mentioned conventional technique, the present invention aims to provide a variable air gap type motor capable of obtaining a static torque by a permanent magnet and effectively utilizing the magnetic force of the permanent magnet.

[0010]

[Means for Solving the Problems]

 The configuration of the present invention that achieves the above object is

A stator provided with a plurality of electromagnets arranged in an annular shape, and when it is attracted to the electromagnets in order, it swings around the center of the stator as a center of rotation and swing, and the diameter difference between the stator and In a variable air gap motor having a rotor that rotates in a direction opposite to the magnetizing direction of the electromagnet, each electromagnet is mounted on a permanent magnet that is annularly arranged independently of each other so that the polarities alternate. It is characterized by having done.

[0012]

[Action]

 According to the present invention having the above structure, the magnetic force of the electromagnet and the magnetic force of the permanent magnet can be added. The static torque can be obtained by a permanent magnet.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a part of a stator of a variable air gap type motor according to an embodiment of the present invention. As shown in the figure, each permanent magnet 11 is a member having the same cross-sectional shape as each magnetic pole 3 of the electromagnet 4 (see FIGS. 2A and 4A), and is independent of each other on the frame 5. Then, the magnetic poles 3 are mounted on the respective magnetic poles 3 while being arranged annularly. At this time, the permanent magnets 11 are arranged so that their polarities are alternately arranged in the circumferential direction. That is, the surface (upper surface) of the permanent magnet 11 on which the magnetic poles 3 of # 1, 3, 5 are mounted is an N pole, and the permanent magnets on which the magnetic poles 3 of # 2, 4, 6 are mounted. 11, the surface (upper surface) on the magnetic pole 3 side is the S pole.

The variable air gap type motor of this embodiment having the stator 1 has the same structure as the variable air gap type motors shown in FIGS. 2A and 4A except for the above.

When a voltage as shown in FIG. 3B is supplied to the electromagnet 2 of the variable air gap type motor as described above, a magnetic force generated by adding the magnetic force of the electromagnet 2 and the magnetic force of the permanent magnet 11 at the magnetic pole 3 is generated. To do. The rotor 6 is rotated by the rotating torque based on the added magnetic force.

The static torque is obtained by the magnetic force of each permanent magnet 11.

[0018]

[Effect of the device]

 According to the present invention, the magnetic force of the permanent magnet for obtaining the stationary torque can also be used as the magnetic force for obtaining the rotating torque, as described in detail with the embodiments above, and the effective use of the magnetic force can be measured. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of a stator of a variable air gap type motor according to an embodiment of the present invention.

FIG. 2 is a sectional view (a) and a perspective view ((b) to (d)) of each part showing a variable air gap type motor according to a conventional technique.

3 (a) is an explanatory view showing the arrangement of magnetic poles of the variable air gap type motor shown in FIG. 2 (a) and a waveform diagram showing a voltage waveform supplied to an electromagnet of the variable air gap type motor.

FIG. 4 is a sectional view (a) showing another variable air gap type motor according to the prior art and a perspective view showing a permanent magnet thereof in an extracted manner.

[Explanation of symbols]

 1 Stator 2 Electromagnet 3 Magnetic pole 4 Winding 5 Frame 6 Rotor 11 Permanent magnet

Claims (1)

[Scope of utility model registration request] 1. A stator provided with a plurality of electromagnets arranged in an annular shape, and a diameter of the stator when the electromagnets are sequentially attracted to cause the stator to swing around the center of rotation and swing. In a variable air gap type motor having a rotor that rotates in a direction opposite to the excitation direction of the electromagnet at a ratio based on the difference, each electromagnet is placed on a permanent magnet that is annularly arranged independently of each other so that the polarities are alternately arranged. A variable air gap type motor characterized by being mounted.