Design and Study on Power Supply for Giant Magnetostrictive Accurate-Motion Actuator

M. Wu; Xi Lin Zhu

doi:10.4028/www.scientific.net/KEM.392-394.787

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 392-394Design and Study on Power Supply for Giant...

Design and Study on Power Supply for Giant Magnetostrictive Accurate-Motion Actuator

Abstract:

The architecture and operation theory of Giant Magnetostrictive Accurate-motion Actuator have been introduced. After analysing the driving characteristic of giant magnetostrictive material and requirement of driving power, a design method of wide range and high precision NC constant-current source has been put out. The output circuit is composed of serial 12-bit DACs Max531, low-noise high-speed precision operational amplifiers OP27 and driving circuit. It provides current from 0 to 2.048A with 0.5mA step value. Two fully differential input channels 16-bit, sigma-delta ADCs AD7705 collects output current in feedback loop. Current ripple is controlled under 0.25mA through using homemade high-performance linear power. The result shows that the driving power with characteristic of high stability and fast response meets the needs of driving of Giant Magnetostrictive Accurate-motion.

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Periodical:

Key Engineering Materials (Volumes 392-394)

Pages:

787-792

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.392-394.787

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Online since:

October 2008

Authors:

M. Wu, Xi Lin Zhu

Keywords:

Closed-Cycle Control, Constant Current Source, Giant Magnetostrictive Material (GMM)

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