A kind of micromotor magnetization method and its magnetization assembly

Abstract

The invention discloses a micromotor magnetizing mode and a magnetizing subassembly using the same. The outputting energy of a magnetizing machine is controlled to magnetize motors during rotation of the motors, and curves of magnetic energy generated by an outputting voltage and an outputting current of the magnetizer on a magnetizing head are distributed effectively, so that a magnetic force curve of each magnetized motor conforms to the required magnetic force curve of the motor during rotation of the motor. Compared with the prior art, the micromotor magnetizing mode has the advantages that the order secondary resonance of the same micro-motor is greatly reduced when the micromotor magnetizing mode is used, and vibration or resonance and noises which are generated during running of the micro-motor can be reduced.

Description

technical field [0001] The invention relates to the field of a micro-motor, in particular to a magnetizing assembly for a micro-motor. Background technique [0002] Micro motor, the full name of "micro motor", refers to a motor with a diameter of less than 160mm or a rated power of less than 750W. Micromotors are often used in control systems or transmission mechanical loads to realize functions such as detection, analytical operation, amplification, execution or conversion of electromechanical signals or energy. [0003] For example, car seat motors and wiper motors all use micro-motors. When the micro-motors are magnetized, in order to make the motor run with less vibration or noise, the magnetic field of the motor needs to be a uniform curve. The complex wave should be reduced as much as possible at the intersection, so that the cogging moment of the motor will be reduced when the motor is running, so that the resonance caused by the cogging effect will be reduced when t...

AI Technical Summary

Problems solved by technology

[0004] The conventional methods are as follows: 1. The demagnetized steel is firstly magnetized and then loaded into the stator or rotor. This method is the most simple, but the magnetic force curve of the magnetized steel is an irregular curve, and the vibration and vibration of the motor running Noisiest

2. The magnet steel is not magnetized first, and after the stator or rotor is installed, the stator or rotor is magnetized in the static mode of the motor. The magnetic force lines of the magnet steel after this magnetization method are better, but at the intersection of the north and south poles The complex wave is relatively large, and the resonance is more obvious when the motor is loaded. Generally speaking, to change the magnetic force curve of the magnetic steel, the strong magnetic force of the magnetization must be effectively distributed, but the space inside the general motor is very small. After the rotor is fixed, there is no space to put it into the tool to effectively distribute the magnetic force curve, so the order energy resonance of the motor is obvious

[0005] Taking a car seat adjustment micro-motor as an example, it generally uses a four-pole rare ring magnet. Usually, it adopts the method of internal magnetization, and the magnet is magnetized and then loaded into the motor. However, since this magnet is Rare, its coercive force is very high, so it can only be magnetized on the inner surface. After the magnetization is completed, the reciprocating wave of the north and south poles is very large, so that the order resonance of the motor is very large when it is rotating, and the motor is under load. resonance and obvious

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