Brushless direct-current motor structure with a plurality of magnetic pole pairs and slots in fixed ratio

Abstract

The invention provides a brushless direct-current motor structure with a plurality of magnetic pole pairs and slots in a fixed ratio. A motor stator is formed by stacking a plurality of magnetic conduction silicon steel sheets; a plurality of 15-time winding slots are arranged on the magnetic conduction silicon sheets; the motor stator consists of X, Y and Z phase windings, each phase has integral phase groups between 2 and 4 and each phase group has 5 winding slots; the motor rotor is formed in such a way that a plurality of arc shaped magnets are pasted to a round magnetic conduction iron ring at equal intervals in sequence, the radial magnetic pole of each arc shaped magnet is opposite to the radial poles of adjacent arc shaped magnets on left and right; and each arc shaped magnet stands for a magnetic pole, and the quantity of the magnetic poles of the motor rotor is the multiple of 14 or 16, therefore the purpose of reducing the instant turning torque of a motor can be achieved.

Description

【Technical field】 [0001] The invention relates to a structure of a brushless direct-current motor with a fixed ratio between plural magnetic pole pairs and the number of slots, in particular to a structure capable of reducing motor cogging torque. 【Background technique】 [0002] The brushless permanent magnet motor rotor is composed of a plurality of magnetic poles, each arc magnet is fixed on a magnetically conductive circular iron ring, and each arc magnet is aligned with the radial poles of the left and right adjacent arc magnets. for the opposite. The stator is composed of a plurality of magnetically permeable silicon steel sheets stacked, and each magnetically conductive silicon steel sheet is provided with a plurality of winding slots, and copper wires (enameled wires) are sequentially wound on the winding slots. Due to the cogging effect during the operation of the motor, when the rotor rotates relative to the stator, a force acting on the rotor will be generated, wh...

AI Technical Summary

Problems solved by technology

However, the quotient divided by the number of stator winding slots and the number of motor rotor pole pairs is a non-integer range too wide and impractical

And the star-shaped wrong winding method is very complicated and different from the general winding method. It is difficult to wind by hand or machine, and the manufacturing cost is high.

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