Moving-iron electromagnet

Abstract

The invention discloses a moving iron electromagnet. The permanent magnet is used to generate the excitation magnetic field, which greatly reduces the energy consumption of the system, reduces the calorific value of the system, and improves the system performance; uses the full bridge magnetic circuit to realize the accurate control of the movement of the moving iron, and achieves good control performance; adopts "∏ "Shaped armature, the middle arm of the armature and the control coil do not move during the movement, and the side arm of the armature is connected by light materials to lead out the output, which greatly reduces the mass of the movable part and is conducive to the increase of frequency; the armature on both sides of the armature The effect of the high stiffness spring is conducive to the reduction of hysteresis; there is only one control coil, and the control coil and the output part are separated, the space around the armature is spacious, the structure is simplified, and it is beneficial to reduce the volume of the entire electromagnet; it has a compact structure, The advantages of small size, high efficiency, energy saving, and large power-to-weight ratio. The invention can be applied to systems requiring high-frequency electromagnetic drive devices such as electronic engraving machines.

Description

technical field [0001] The invention relates to a high-frequency electric-mechanical conversion mechanism used in an electromagnetic drive system, in particular to a moving iron electromagnet. Background technique [0002] The moving coil electromagnet can reach a higher frequency, but this kind of electromagnet has a large volume and needs to be equipped with a special heat dissipation system, which consumes a lot of energy; in order to achieve good linearity, the distribution of the stable magnetic field and the winding requirements of the moving coil high. Most of the moving iron high-frequency electromagnets are simply driven, with switching properties and poor control characteristics; the electromagnets of the general bridge magnetic circuit are mostly two control coils, plus springs and output parts, making the space around the armature very cramped , At the same time, the mass of the movable part of the armature is also relatively large. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0002] The moving coil electromagnet can reach a higher frequency, but this kind of electromagnet has a large volume and needs to be equipped with a special heat dissipation system, which consumes a lot of energy; in order to achieve good linearity, the distribution of the stable magnetic field and the winding requirements of the moving coil high

Most of the moving iron high-frequency electromagnets are simply driven, with switching properties and poor control characteristics; the electromagnets of the general bridge magnetic circuit are mostly two control coils, plus springs and output parts, making the space around the armature very cramped , and the mass of the movable part of the armature is also relatively large

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