Unbalanced Magnetic Pull Effect on Stiffness Models of Active Magnetic Bearing due to Rotor Eccentricity in Brushless DC Motor Using Finite Element Method

<table>The characteristic curves of the MBF versus control current affected by the UMP during commutation in BDCM for loaded operation with eccentricity <svg height="9.5625" id="M45" style="vertical-align:-0.3003pt" version="1.1" viewbox="0 0 10.1 9.5625" width="10.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,9.125)"><path d="M535 290h-212v-206h-58v206h-213v50h213v193h58v-193h212v-50zM535 -22h-483v50h483v-50z" id="xB1"></path></g>
</svg>200 <i>μ</i>m.</table>

Mathematical Problems in Engineering

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Figure 17

Figure 17: Unbalanced Magnetic Pull Effect on Stiffness Models of Active Magnetic Bearing due to Rotor Eccentricity in Brushless DC Motor Using Finite Element Method 

Figure 17 | Unbalanced Magnetic Pull Effect on Stiffness Models of Active Magnetic Bearing due to Rotor Eccentricity in Brushless DC Motor Using Finite Element Method 