Single-phase permanent-magnet synchronous motor with U-shaped iron core and self-starting method of single-phase permanent-magnet synchronous motor

Abstract

The invention discloses a single-phase permanent-magnet synchronous motor with a U-shaped iron core and a self-starting method of the single-phase permanent-magnet synchronous motor. The motor comprises a U-shaped stator core, two stator windings, a radial-magnetizing rotor permanent magnet and a rotating shaft, wherein the two stator windings are symmetrically arranged on the U-shaped stator core; the radial-magnetizing rotor permanent magnet is arranged in an opening of the U-shaped stator core; and the rotating shaft is arranged in the center of the rotor permanent magnet. Through installation of locating permanent magnet blocks in notches in magnetic poles of the U-shaped iron core, a certain included angle is generated between an NS pole axis when a permanent magnet rotor is static and an axis of a magnetic field which is formed after the stator windings are electrified; and after the motor is electrified, the included angle exists between the magnetic field of the stator windings and the permanent magnetic field of the rotor and the torque T acting on the permanent magnet motor is not zero, so that self-starting is achieved; improvement of the properties of the permanent-magnet motor is facilitated; vibration and noise of the permanent-magnet motor are lowered; and the operation stability and reliability of the motor are improved.

Description

technical field [0001] The invention relates to a U-core single-phase permanent magnet synchronous motor and its self-starting method, in particular to a method for offsetting and positioning the initial position of a permanent magnet rotor by using a permanent magnet and a U-shaped core for self-starting realized by sampling this method A single-phase permanent magnet synchronous motor belongs to the technical field of permanent magnet motors. Background technique [0002] At present, the single-phase self-starting permanent magnet synchronous motor is a motor suitable for single-phase power supply. It has a simple structure, low cost, high efficiency and energy saving, and has a good application prospect. The single-phase permanent magnet synchronous motor with U-shaped stator core has a particularly simple structure and is easy to manufacture. Due to the small power of the motor, there is no squirrel-cage winding on the rotor, so this motor does not have self-starting ab...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned existing technical problems, the present invention provides a U-core single-phase permanent magnet synchronous motor and its self-starting method, so as to overcome the existing deficiency of self-starting using an asymmetric uneven air gap structure, and is beneficial to improve Electric motor output and power index

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