METHOD FOR CONTROLLING POSITION ERROR OF A SPINDLE WITH CONE TYPE MAGNETIC BEARING

摘要

This invention is a housing 10, a spindle 15, a motor 20, a front A magnetic bearing 30, the rear magnetic bearing 40 and the sensor (51-53), and a control method for a motor spindle comprising a built-in controller 60: a first sensor on one side of the main shaft (15) 51 receives the radial displacement signal, the spindle receiving the signal from the radial displacement of the other (15) to the second sensor 52, the axial direction to the third sensor 53 on the other end of the spindle 15 Take a displacement signal threshold (I ₁ , I ₂ ) with variation error ( ₁ ~ ₃ ) a first step for calculating; And a displacement error of the first stage ( ₁ ~ ₃ ) of the upper and lower portions of the front stator magnetic bearing 30 is a combination of 31 and 32 and rear upper and lower stators of the magnetic bearings 40, 41 and 42 Each individual output (i ₁ ~ i ₄ ) and a second step of generating is characterized by comprising a. ; Thus, the cone Equipped with a radial magnetic bearing has an effect such that as well in the machine tool that can parallel the axial support in addition to improving the precision of the operation to reduce the size of a simplified structure of a magnetic bearing spindle system.