JPS6142252A - Motor - Google Patents

Abstract

PURPOSE:To obtain a motor which has a rotor including a simple structure to enhance the working accuracy, a small size, a light weight, and accurate and high speed rotation by disposing a stator at the center, and oppositely disposing the rotor outside to form the motor. CONSTITUTION:An exciting winding is wound on a stator 3, and secured to a stationary shaft 4. Rotors 2 having integral permanent magnets 7 are opposed on the outer periphery of the stator 3 to rotate at the shaft 4 as a center. Thus, since a winding may not be wound on the rotors 2, the rotors 3 may be manufactured accurately to sufficiently endure against high speed rotation.

Description

[Detailed description of the invention] This invention relates to electric motors, particularly electric motors. Regarding improvements to the structure of the aircraft. Conventional electric motor The stator yoke, rotor, field winding, etc. Composed of various parts, various electric motors has been produced and used in various fields.

In conventional electric motors, the rotor is inside the motor. It is installed in the core, the field is fixed, and the outside It is placed on the side, giving it a sense of structure.

Since rotors are manufactured from three parts: the core, windings, and shaft, there are many problems in manufacturing the rotor, such as durability, accuracy, number of processes, etc., and the risk of failure. The most common cause was the part that was intertwined with the life of the electric motor. Furthermore, since the stator has a similar structure, it is necessary to limit various aspects such as the size and weight of the electric motor. Due to recent advances in electrical technology, conventional electric motors are no longer able to meet the demands of electric motors. In particular, electric motors related to information equipment are required to be thinner, lighter, rotate more accurately, and at higher speeds, etc., and the present invention solves these problems that cannot be solved with conventional electric motors. It contributes to development.

Today, with the development of electrical technology, high precision permanent magnets have been developed.
Today, it is used as a stator in small electric motors.
It is used only on the outside of the motor as a stator, and the rotor is wound around a yoke. Although structural improvements have been made, today's demands for thinner, lighter,
It is not possible to meet the demands for more accurate rotation and higher speed.

In the present invention, since the part that becomes the rotor can be manufactured only by mechanical processing, a rotor with high precision can be obtained, which is completely different from the rotor of a conventional electric motor, and the weight and thickness of the rotor itself can be reduced to approximately i, and it is possible to make the electric motor thinner and lighter without any problems. It is now possible to manufacture motors with a thickness of several millimeters, which would be impossible with conventional motors.

Embodiments of the electric motor according to the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of the electric motor, in which the electric motor is divided into two from the center.

■ is the rotor ■ is the motor cover ■ is the rotor magnet ■ is the fixed shaft ■ is the stator yoke ■ is the field winding.

An embodiment of the motor having the above configuration will be described. First, the first feature of the electric motor of the present invention is that (1) the rotor is constructed integrally with (2) the rotor magnet and rotates. In other words, the ■rotor and ■rotor magnet rotate around the ■fixed shaft. Since conventional electric motors consist of a rotor yoke and windings, the shape of the rotor can only be manufactured to a certain limit. The rotor of the present invention is
By using magnets in the rotor body, the structure is simple, and since the radius of the rotor itself is large, the weight and thickness of the rotor itself can be reduced to 100% compared to conventional electric motors. It can be done. ■The fixed shaft is wound with ■stator yoke,
As a stator ■It is fixed to a fixed shaft. Conventional stators are located on the outside of the motor, and for more powerful, higher-speed motors, a very large yoke and many windings are required, which poses difficulties in terms of manufacturing and precision. The biggest challenge was making it smaller and lighter. The stator of the present invention is located at the center of the electric motor and does not perform any rotational movement, so in terms of accuracy and manufacturing, it is sufficient to perform its mission with an accuracy and weight equivalent to that of the conventional wire. Not at all. Since the rotor of the present invention has an external rotor, the rotor radius is more than twice that of conventional motors, so it is more than twice as accurate as conventional motors when determining the rotational angle position of a stepping motor. is obtained. Widely used in current information equipment. Because the positioning motor uses a rotor with a small center diameter,
In the case of highly accurate positioning, multiple electric motors and calculation equipment were used to determine the position, but with the electric motor of the present invention, the outer diameter of the rotor can be designed to be large, making it possible to determine the position with high accuracy. In addition, in order to obtain more accurate rotation, the rotor itself must be perfectly round, but with conventional rotors, a yoke is attached to the shaft, and the winding work is performed on the yoke. Since it was finished as a rotor, various problems occurred in terms of accuracy. If the rotor is out of roundness during the winding process, it will cause vibrations during high-speed rotation, which can lead to failures. In the present invention, the rotor does not require winding work, and it is possible to manufacture a high-precision rotor.
This results in a rotor that can withstand any high-speed rotation.

The present invention installs the stator and rotor parts of a conventional electric motor in completely opposite positions, simplifies the structure of the rotor part, uses high-precision permanent magnets, and uses a process called yoke winding. By improving the parts that require precision, the rotor, which is the heart of the motor, is mounted on the outside, creating a motor with higher precision and a wider range of applications.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an electric motor according to the present invention. ■・・・・・・Electric motor case ■... Rotor ■・・・・Stator ■・・・・・・Fixed shaft ■・・・Rotor ■・・・・Electric motor case ■・・・・・・Rotor magnet

Claims (1)

[Claims] An electric motor in which the rotor is located on the outside of the motor rather than in the center, and the stator is located in the center.