Electromagnetic damping device and method with three-dimensional magnetic field

Abstract

The invention provides an electromagnetic damping device and method with a three-dimensional magnetic field. The electromagnetic damping device comprises a U-shaped iron core, magnetic multipoles and a damping aluminum sheet, wherein the magnetic multipoles are symmetrically clung to the two opposite surfaces of the U-shaped iron core; each surface of the U-shaped iron core is formed by staggered connection of a plurality of permanent magnets N and S; the damping aluminium sheet is positioned in an air gap of the U-shaped iron core and is fixedly connected with a mechanism to be damped. The electromagnetic damping device and method provided by the invention have the advantages that the three-dimensional magnetic field is formed by adopting staggered distribution of the plurality of permanent magnets N and S, so that not only is the requirement on non-uniform magnetic field met, but also the magnetic force of the magnetic field in all directions is large, so that a good damping effect of the damping aluminium sheet moving in all the directions is realized; simultaneously, a non-contact structure and the non-magnetic-permeable damping aluminium sheet guarantee that electromagnetic damping can not generate any additional force, so that the measuring accuracy is guaranteed, and the device and the method can be applied to a precision electromagnetic balance and other fields requiring elimination of mechanical vibration.

Description

technical field [0001] The invention relates to a damper and a damping method, in particular to a non-contact three-dimensional magnetic field electromagnetic damping device and a damping method. Background technique [0002] Mass measurement is one of the basic measurements in physics, and the most commonly used tool for measuring mass in physics experiments is the balance. Precision balances generally use a knife edge to decouple the suspended weight from the balance beam. When the suspended weight sloshes, it will cause mass measurement errors. Therefore, dampers are usually added to the balance to stop the suspended object as soon as possible. The damper of an ordinary balance should make the balance stand still in less than one minute, while the damper of a precision balance should make the balance completely still within 1-2 periods of swing without affecting the measurement of mass. [0003] Generally, the balance adopts air damping. The air damping is composed of an...

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Problems solved by technology

But it also has many disadvantages: the oil will generate buoyancy; the oil must be in contact with the suspended object, so it will continue to dialysis upward along the contact rod; when the suspended object sloshes, it will cause oil to adhere to the contact rod and cause quality changes

In high-tech, precision, and cutting-edge technical fields, mechanical vibrat

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