Axial magnetic field printed circuit board permanent magnet brushless DC motor

Abstract

The invention discloses an axial magnetic field printed circuit board permanent magnet brushless DC motor. Including the rotating shaft, a pair of symmetrically arranged turntables installed on the rotating shaft; permanent magnets are fixed on the opposite surfaces of the two turntables; a printed circuit board is arranged in the middle of the two turntables, and there is a gap between the printed circuit board and the permanent magnets on both sides ; On the printed circuit board, there are many radial single wires evenly distributed around the center of the circle; the single wires are evenly divided into multiple groups, and each group of single wires includes a 3-phase coil; the single wire in each phase coil passes through the outer The outer ring connecting wire at the end and the inner ring connecting wire at the inner end are connected to form a winding loop. The invention uses printed circuit boards instead of traditional windings, so that the design of the motor stator is flexible and changeable, and high-precision wiring is realized; the circuit boards are arranged in multiple layers to increase the current carrying capacity, thereby increasing the power of the motor; no iron core is required, and eddy current loss is eliminated. The efficiency is improved, and the overall structure is simplified, which is beneficial to the assembly line and improves the production efficiency.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an axial magnetic field printed circuit board permanent magnet brushless DC motor. Background technique [0002] Compared with the traditional electric excitation motor or permanent magnet brushed DC motor, the permanent magnet brushless DC motor has the characteristics of simple structure, reliable operation, small volume, small mass, less loss and high efficiency. At present, the scope of application is extremely wide, covering almost every field of aerospace, national defense, industrial and agricultural production and daily life. [0003] In recent years, the structure of this permanent magnet brushless DC motor has not changed significantly. The rotor mainly adopts radial pole segmented permanent magnets, and the stator is composed of coils wound in laminated silicon steel sheets. Due to the use of hand-wound copper wires, the motor with this structure has complex processes,...

AI Technical Summary

Problems solved by technology

Due to the use of hand-wound copper wires, the motor with this structure has complex processes, high labor and material costs, and unstable quality; the mass of the laminated silicon steel sheets accounts for about one-third of the total mass of the motor, resulting in large volume and high quality. Large, large eddy current loss, low efficiency

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