Electric active sound isolation actuator for elastic plate

Abstract

The invention aims at providing an electric active sound isolation actuator for an elastic plate. The electric active sound isolation actuator comprises an outer magnetic conducting cylinder, an upper end cover, a lower end cover, a permanent magnet, an upper armature, a lower armature, an upper pulley assembly and a lower pulley assembly, wherein the permanent magnet is arranged between the upper armature and the lower armature and forms a magnetic circuit together with the outer magnetic conducting cylinder. The upper armature, the lower armature and the permanent magnet are clamped by the upper pulley assembly and the lower pulley assembly and are fixed through bolts to form a mover part of the actuator. The upper end of the mover part is provided with a plate spring, and the outer end of the plate spring is arranged between the upper end cover and the outer magnetic conducting cylinder. The upper end cover is arranged at the upper end part of the outer magnetic conducting cylinder, the plate spring is fixedly arranged between the upper end cover and the outer magnetic conducting cylinder, and the lower end cover is arranged at the lower end part of the outer magnetic conducting cylinder. An upper coil and a lower coil are respectively wound on the inner wall of the outer magnetic conducting cylinder according to opposite directions. The electric active sound isolation actuator is compact in volume, large in output force and relatively high in work efficiency; and the mounting time and debugging time during control are shortened because the electric active sound isolation actuator can be used by only switching on a power source while being mounted.

Description

technical field [0001] The invention relates to a noise control device, specifically an electromagnetic actuator. Background technique [0002] According to different specific control methods, active noise control technology can be divided into active sound control and active force control. Before the 1990s, active control systems generally used sound sources (such as loudspeakers) to generate secondary sound fields for control. Therefore, this active control method is called active sound control, also known as "muffling noise with sound". The research on active sound control reached its peak in the mid-1980s to the mid-1990s, and the research of the Institute of Sound and Vibration (ISVR) of the University of Southampton in the UK was the most outstanding. The research results were mainly applied to the cabins of ships or aircraft, Automotive cabs and other workspace environments. [0003] In engineering practice, a considerable part of the noise is caused by structural ...

AI Technical Summary

Problems solved by technology

However, the axial length of the electric actuator described in this technical solution is relatively large, and the overall mass is relatively large, and the lateral installation has a great influence on the structure of the elastic plate

The name is an electromagnetic actuator for active control of amorphous alloy transformer noise, and the patent publication number is CN103050216A. It has a simple structure and low manufacturing cost, but the electromagnetic actuator moving iron core and actuator The bases are only connected by leaf springs, and the lateral support is insufficient, resulting in limited service life of the leaf springs

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