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Magnetic Circuit Design for Six-Wire Suspension Type Actuator in a Super Multioptical Pickup

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6 Author(s)

We have developed a new magnetic circuit consisting of eight permanent magnets with special placement order. Here, we analyze the magnetic flux density distribution, the driving force distribution, and the interference force using the finite-element method. The driving sensitivity of the actuator at low frequency is nearly twice that of a conventional actuator. We have built several samples and compared their performance with simulation data. The results prove the validity of the proposed magnetic circuit and the design method.

Published in:

IEEE Transactions on Magnetics  (Volume:44 ,  Issue: 5 )