Giant magnetostrictive actuator with permanet torque output and control method thereof
A technology of giant magnetostrictive and giant magnetostrictive rods, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc.
Inactive Publication Date: 2011-04-20
DALIAN UNIV OF TECH
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Problems solved by technology
At present, some types of micro-displacement actuators have some of the above-mentioned performances, such as electrothermal micro-displacement actuators, electromagnetic micro-displacement actuators, piezoelectric ceramic actu
Method used
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Embodiment 1
[0041] Embodiment 1 - The external force is a static force: in this embodiment, the size of the giant magnetostrictive rod is Φ12×100mm, the height and the number of turns of the coil 8 are respectively 0.114m and 1800 turns, and the outer diameter of the enameled wire strip is 1.43mm. The shape spring 27 is an A series disc spring 35.5, and the Hall sensor 16 is a linear Hall sensor A1302EUA produced by Allegro Company of the United States, with a sensitivity of 1.3mv / G. Figure 5 is a schematic diagram of the experimental system, in which the main parameters of the main components are as follows: BP4610 high-speed bipolar power supply is selected, and the minimum adjustable current is ±0.001A. The LSM-3000 load cell is selected, the maximum measuring range is 3000N, and the minimum measuring force is 0.1N.
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Abstract
A giant magnetostrictive actuator with permanet torque output and a control method thereof belong to the magnetostrictive actuator field, and particularly relate to a giant magnetostrictive actuator with permanet torque output which uses a giant magnetostrictive rod as the core element and a control method thereof. The giant magnetostrictive actuator is in an axisymmetric structure, wherein a barrel-shaped cylinder is arranged at the bottom of the circular cavity of a barrel-shaped shell which is provided with a circular boss at the bottom and a circular groove in the center; a lower magnetizer is arranged at the bottom of the circular cavity of the cylinder; and a cylindrical magnet yoke is arranged on the upper part of the lower magnetizer. The control method of the giant magnetostrictive actuator comprises the following steps: firstly establishing a permanent torque output control module of the giant magnetostrictive actuator, and secondly using a giant magnetostrictive positive effect model, a giant magnetostrictive inverse effect model and a giant magnetostrictive material elastic modulus model to eliminate the coupling effect of the magnetostrictive positive effect and inverse effect in the giant magnetostrictive rod and ensure that the giant magnetostrictive actuator can complete permanent torque output under the combined action of the current in a coil and an external force.
Description
technical field [0001] The invention belongs to the field of magnetostrictive actuators, in particular to a giant magnetostrictive actuator with constant force output and a control method with a giant magnetostrictive rod as a core component. Background technique [0002] In the manufacturing fields such as precision and ultra-precision machining, micro-displacement actuators with high performance such as high position resolution, large output force, fast response capability and low creep are one of the key units. At present, some types of micro-displacement actuators have some of the above-mentioned performances, such as electrothermal micro-displacement actuators, electromagnetic micro-displacement actuators, piezoelectric ceramic actuators, and shape memory alloy actuators, etc. All important properties required for precision machining. With a large magnetostriction coefficient (1500×10 -6 ~2000×10 -6 ), high electromechanical coupling coefficient, fast response speed ...
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Inventor 贾振元刘慧芳王福吉宗福才葛春亚
Owner DALIAN UNIV OF TECH
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