Permanent magnet axial magnetic flow frequency conversion draught fan

Abstract

The invention discloses a permanent magnet axial magnetic flow frequency conversion draught fan. The permanent magnet axial magnetic flow frequency conversion draught fan comprises a protection shell, a base, a stator iron core, an armature winding, a rotor iron core, a permanent magnet, an impeller, a bearing, a pressing nut and a fixing end cover. In the permanent magnet axial magnetic flow frequency conversion draught fan, the disc iron cores and fractional-slot concentrated winding are adopted. A permanent magnet excitation synchronous motor conducts driving, rotation speed adjustment is achieved in a current frequency conversion manner, and the motor is arranged in the cup-shaped rotation impeller. A fixed part and a rotation part of the draught fan are connected through a bearing, and the rotation function is achieved. According to the permanent magnet axial magnetic flow frequency conversion draught fan, the unilateral magnetic pull force of the axial magnetic flux motor is utilized, and the swinging problem of a draught fan rotation body in the rotation process and the pressure to the bearing from the gravity are avoided.

Description

technical field [0001] The invention belongs to the field of axial flux motors, and more specifically relates to an electric fan with integrated motor rotor and fan rotor, excited by permanent magnets, and controlled by frequency conversion. Background technique [0002] In the traditional ceiling-mounted fan, the blades are susceptible to unbalanced disturbance force when they are rotating, which will cause the blades to swing in polarization and cause damage to the bearings. At the same time, due to the gravity of the fan rotor, the bearing will bear part of the axial force, which will accelerate the wear of the bearing and reduce the service life. Traditional fans generally use induction motors as driving motors. As the most widely used industrial motors, induction motors have the characteristics of simple control, simple structure, and low price, but their poor speed regulation characteristics limit their applications. The efficiency is low and the heat generation is se...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of the prior art, the present invention provides a permanent magnet axial flux frequency conversion fan, which enables the permanent magnet synchronous motor frequency conversion control method to achieve good speed regulation performance, and solves the problems caused by the polarization swing of the blades in the prior art to the bearing. Destruction, poor fan speed regulation characteristics, low efficiency under large speed regulation range conditions, serious heat generation and other technical problems

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