Silicon steel plate for motor stator

Abstract

The invention provides a silicon steel plate for a motor stator, in order to solve problems derived from bad configuration relation between inner diameter and outer diameter of a silicon steel plate in the prior art. A silicon steel plate used to form a stator of a motor is disclosed. The silicon steel plate includes a plurality of magnetic pole units. Each of the plurality of magnetic pole unitsincludes a magnetic yoke portion, a pole portion and a boost portion. The magnetic yoke portions of the plurality of magnetic pole units are connected as a magnetic yoke ring. The boost portion includes an inner face, and the inner faces of the boost portions of the plurality of magnetic pole units form a receiving hole. The receiving hole has a maximal diameter, the silicon steel plate has a maximal diameter, and a ratio of the maximal diameter of the receiving hole to the maximal diameter of the silicon steel plate is 0.54-0.84.

Description

technical field [0001] The invention relates to a motor part, especially a silicon steel sheet for a motor stator. Background technique [0002] Please refer to figure 1 , which is an existing silicon steel sheet 9 used in the motor stator, the silicon steel sheet 9 has a yoke ring 91, and the outer ring edge of the yoke ring 91 can be assembled to a motor base (not shown in the figure ), the inner edge of the yoke ring 91 is provided with a plurality of equiangularly distributed poles 92 for respectively winding a coil C; the end of each pole 92 extending toward the center is connected with a pole piece 93, The pole piece 93 is used to expand the magnetically permeable area of ​​the silicon steel sheet 9, and an accommodating hole 94 is formed surrounded by the inner surfaces of the plurality of pole pieces 93, and the accommodating hole 94 is used for accommodating a rotor (Fig. not shown). An embodiment similar to the existing silicon steel sheet 9 has been disclosed i...

AI Technical Summary

Problems solved by technology

[0004] But outward lengthening the length of each pole post 92 will make the maximum diameter width W of the yoke ring 91 of the silicon steel sheet 9 correspond to expand, and cause the size of the whole silicon steel sheet 9 to become larger, for the need to improve the motor drive torque but the motor installation space In terms of quite limited demand conditions, such as motors used in drones, the aforementioned method of increasing the size of the silicon steel sheet 9 is bound to be unsuitable

Relatively, if the length of each pole 92 is lengthened inwardly, the aperture d of the accommodating hole 94 of the silicon steel sheet 9 will be reduced, and the size of the rotor must be reduced. Consideration; In addition, the gap between any two adjacent pole pieces 93 becomes smaller, which will easily cause problems such as increased difficulty in the operation of the winding coil C

[0005] Another way to lengthen the length of each pole post 92 is to reduce the inner ring edge of the yoke ring 91 to the outside without changing the maximum diameter width W of the yoke ring 91 and the aperture d of the accommodating hole 94. The width a of the rim; yet, if the width a from the inner rim to the outer rim of the yoke ring 91 is too small, the structural strength of the whole silicon steel sheet 9 will be insufficient, so that the silicon steel sheet 9 is easily deformed, which jointly affects the The ease of assembly and the stability of the combination of the silicon steel sheet 9 and the motor base, so it is still necessary to improve

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