JPS59136033A - Motor - Google Patents

Abstract

PURPOSE:To improve an efficiency of winding process and a space factor of the winding and obtain a motor with small size and high efficiency by a method wherein adjacent magnetic pole cores are solidly connected by a common material with the core at the side which is facing a rotor. CONSTITUTION:Adjacent magnetic pole cores 301 of a stator are solidly connected by an arm 302 which is made of the same magnetic material as the core at the side which is facing a rotor. The stator core 301 is made of magnetic material such as silicon steel plates which are punched by a die and laminated and the arm 302 is so formed as to be narrow enough compared to the width of the magnetic pole cores 301 but to be strong enough not to create the dispersion of the shape of the core or the relative position of the poles 301 during the processing and assembly. The magnetic resistance of the arm is large and the saturated flux of the arm is small by making the arm as narrow as possible. With this constitution, the windings can be applied easily and the space factor is improved so that a motor with small size and high efficiency can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor and a method for manufacturing the same. More specifically, the present invention relates to a structure of a magnetic core that constitutes a part of a stator of an inner rotor type motor and a method of manufacturing and assembling the same.

The motor according to the present invention is a brushless motor consisting of a stator core around which a coil is wound and a rotor, or a motor having a structure in which the stator is installed outside the rotor. Conventionally, this type of motor had a structure as shown in Figure 1.

The motor shown in FIG. 1 can be used as a constant speed rotation type motor or as a pulse type motor.

101 in FIG. 1 is a rotor arm shaft, to which a rotor 102 is attached. This is a high permeability magnetic core that constitutes the 103 Rischeetah, and a coil 104 is wound around each magnetic pole portion. Rotor 102a is usually composed of a magnetic core containing a permanent magnet, for example, as shown in (B), permanent magnet 1
05 sandwiched between magnetic cores 106. magnetic pole 10
The rotor facing part (C5) of 4 and the stator facing part (6) of 102 and 106 are provided with tooth-shaped loes 107 and 108 as necessary according to the motor specifications. When winding a coil around a part of the stator of a motor having this structure, the winding must be done from the side where the rotor is arranged around the magnetic poles of the stator core, as indicated by the arrow T in Figure 2. As is well known to those skilled in the art, the coil winding process is extremely complex and inefficient.

In other words, the winding machine must be inserted inside the stator to wind the wire, and the winding speed becomes very slow, and the stator core opening is narrower than the winding section, making dense winding impossible. .

The present invention aims to provide a low-cost motor with high volumetric efficiency by changing the structure of the stator core to improve the efficiency of the winding process and increasing the filling rate of one winding. It is something.

EMBODIMENT OF THE INVENTION Hereinafter, the motor according to the present invention will be explained based on drawings of embodiments.

FIG. 3 is a diagram showing the structure of the motor according to the present invention.

The structure of a part of the rotor is basically the same as in FIG. 301
Adjacent magnetic pole cores, which are the magnetic pole core portions of the stator, are connected by arm portions 302 made of the same magnetic material.
It is joined on the side facing the rotor (i.e. on the inside). Here, the stator core can be formed from one member for one motor, or it can be formed from a large number of thin plate-like magnetic cores processed into the same shape. It is also possible to integrate the Ut layer. In general, a method of punching and layering a silicon steel plate or the like using a punching die is suitable. The arm portion 502 is formed sufficiently thinner than the width of the magnetic pole core portion 301.

The magnetic resistance of the arms is increased by making the core as thin as possible, and the saturation magnetic flux of the arms is In FIG. 2 302, a curved portion is formed in the middle portion to make the arm thinner and longer.

Although a one-sided structure is not necessarily required, it is better to have one in order to increase magnetic resistance. In the core 601, the outer portion that does not face the rotor is open, unlike a conventional stator core. Then, coil winding is performed in the direction of the arrow in FIG. 3, that is, from the outside of the core. Compared to the conventional method of winding from the inside of the core, the winding machine is not limited by the core shape, making it possible to realize a high-speed and efficient winding machine.
Furthermore, since the core opening can be made larger, the coil filling rate of the core winding portion can be greatly improved compared to the conventional method. That is, it becomes possible to wind the wire so that the entire winding space is covered by the coil.

As mentioned above, the motor with the stator core structure of the 8AK developed by us is extremely superior, especially in terms of downsizing and increasing efficiency of the motor, as winding can be done easily and the filling rate can be easily increased. Father, the assembly and manufacturing cost can also be significantly lower than that of conventional motors. Based on the present invention, various motor structures other than the example shown in FIG. 3 are possible, and basically all motors having the above-mentioned structure belong to the present invention. It is.

[Brief explanation of drawings]

Figures 1 - (D>Fi) show the structure of a conventional motor to which the present invention relates. Part 2 shows a method of winding wires around the stator of the motor in Figure 1. Figure 3 shows a motor according to the present invention. This is an example. 101 Rotor main shaft 102 Rotor 103... Stator magnetic core 104 Coil 301... Stator 303... Coil and above Applicant Suwa Seikosha Co., Ltd. Agent Patent attorney Tsutomu Mogami

Claims (1)

[Claims] 1) A motor characterized in that mutually adjacent magnetic pole portions of a magnetic core constituting a stator are connected to each other by a member integral with the core at a side of the magnetic poles facing the rotor.