Permanent-magnetic linear oscillation motor and motor-driven equipment

Abstract

The invention provides a permanent-magnetic linear oscillation motor. The permanent-magnetic linear oscillation motor comprises a mover portion and a stator portion. The mover portion comprises a shaft and a mover iron core, and the mover iron core is installed and fixed on the shaft. The stator portion comprises a primary iron core, a permanent magnet, a coil former, a first coil and a second coil. The primary iron core is provided with a groove used for accommodating the permanent magnet, the coil former, the first coil and the second coil. The first coil and the second coil are symmetrically arranged on the coil former relative to the permanent magnet. When the first coil and the second coil are powered on, a magnetic field is generated, and therefore the mover portion is driven to reciprocate along the axial direction of the shaft. The invention further relates to a piece of motor-driven equipment. According to the permanent-magnetic linear oscillation motor and the motor-driven equipment the mover portion is lighter in weight and fast in dynamic response, the permanent magnet is not liable to lose magnetism, and the motor can run more reliably.

Description

technical field [0001] The invention relates to the field of oscillating motors, in particular to a permanent magnet linear oscillating motor and electric equipment. Background technique [0002] Traditional technology usually uses transmission mechanisms such as ball screws, gears, and cranks to convert the rotary motion of the rotary motor into reciprocating linear motion, which has low transmission efficiency, low mechanical reliability, and difficult maintenance. The linear motor is used to directly drive the load for reciprocating motion, which reduces friction loss, reduces the mechanical time constant of the system, and improves the efficiency and reliability of the system. The linear oscillating motor uses electromagnetic force to generate reciprocating linear motion, and is generally used in electric toothbrushes, air compressors, shavers, camera electromagnetic shutters, speakers, electric hammer machines, mixers, refrigerators, sewing machines, packaging and bindi...

AI Technical Summary

Problems solved by technology

The disadvantage of the above structure is that the permanent magnet is attached to the outer surface of the mover iron core. When the motor is working, the coil magnetic field will have magnetization and demagnetization effects on the permanent magnet, which makes the reciprocating motion of the motor not stable and reliable, and the mover has a large mass.

[0004] Chinese patent ZL201020164959.6 discloses a moving iron linear oscillating motor. Permanent magnets are installed between the stator yoke and the stator core, and 4 stator cores are evenly distributed on the inner circumference of the stator yoke. There are 2 coils, the structure is more complicated

This structure is more complex and the thrust density is lower

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