| 摘要 |
PURPOSE: An active deperming system and a method at the same are provided to reduce a time for processing deperming by selecting a deperming current in step and processing it. CONSTITUTION: An active deperming system includes a magnetic material, an Z-coil, a deperming coil, a magnetic filed measurement unit, a driving power source(25), and a active deperming processing unit. The Z-coil eliminates the vertical direction magnetic field of the magnetic material. The deperming coil removes magnetic filed in vertical and horizontal direction. The magnetic filed measurement unit measures the magnetic filed signal of the magnetic material. A driving power source supplies current to the deperming coil. The active deperming processing unit estimates the deperming current applied to the deperming coil by receiving a magnetic filed signal from the magnetic filed measurement unit, and it controls the driving power source to apply the estimated deperming current to the deperming coil.
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