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Giant magnetostriction parallel micrometric displacement actuator

A giant magnetostrictive and micro-displacement technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of increasing actuator volume and coil power consumption, etc. problem, to achieve the effect of small copper loss, easy multi-point floating output, and small volume

Inactive Publication Date: 2009-12-30
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No matter what cooling method is used, it will inevitably increase the size of the actuator and the power consumption of the coil

Method used

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  • Giant magnetostriction parallel micrometric displacement actuator
  • Giant magnetostriction parallel micrometric displacement actuator
  • Giant magnetostriction parallel micrometric displacement actuator

Examples

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Embodiment Construction

[0024] Preferred embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing: See figure 1 , The giant magnetostrictive parallel micro-displacement actuator includes GMM7 and excitation coil 1, and a GMM ring or multiple GMM rods 7 are arranged in parallel on a closed magnetic circuit jointly generated by one or several parallel excitation coils 1. The micro-displacement generated by the GMM ring or GMM rod 7 is amplified by a displacement amplifier 12 and then output.

[0025] figure 2 and image 3 A first embodiment of the invention is shown. This example mainly consists of an electromagnetic coil with an iron core, 6 short GMM rods and a hydraulic micro-displacement amplifier. It should be pointed out that the number of GMM rods here can be other numbers, not limited to 6. The GMM rods 7 are evenly distributed along the circumferential direction around the axis of the coil 1, such as image 3 shown. A closed magnetic...

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Abstract

The invention relates to a giant magnetostriction parallel micrometric displacement actuator, which realizes parallel magnetic circuit by adopting a plurality of giant magnetostriction material (GMM) short rods, or arranging GMM short rings outside an excitation coil to reduce the magnetic resistance of GMM and reduce the ohm power consumption of coil; GMM and electromagnetic coil achieve separation structurally to reduce the influence of coil heating on the actuator; the magnetostriction displacement of GMM is output after being amplified by a micrometric displacement amplifier.

Description

technical field [0001] The invention relates to a giant magnetostrictive micro-displacement actuator, in particular to a giant magnetostrictive parallel micro-displacement actuator, which can be used in the fields of vibration control, precision machining and the like. Background technique [0002] The giant magnetostrictive micro-displacement actuator has the advantages of large displacement, strong force, high precision, fast response, high reliability and low-voltage drive. However, the existing technology has problems such as high power consumption and low actual conversion efficiency, and the resulting heating and temperature rise problems affect the output volume and output accuracy. [0003] The existing giant magnetostrictive micro-displacement actuator is composed of a rod-shaped giant magnetostrictive material, an electromagnetic coil, a soft magnetic material, a prestressing device, an output rod, and the like. Their common features are: the magnetostrictive rod ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/04H02N2/02
Inventor 李宝福王文吴家龙徐青青
Owner SHANGHAI UNIV
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