A Novel Flux-Reversal Bearingless Slice Motor Controlled by Rotor Angle Independent Suspension Current

Radial Displacement Measurement Method in Bearingless Slice Motor Through Eddy Current Displacement Sensors Positioned on the Underside of the Rotor

“…𝑏 𝑗 (𝐺 𝑗 ) = ∑ 𝛾 𝑗𝑙 (𝐺 𝑗 ) 𝑙 𝑞 𝑙=0 (15) where βjl and γjl are the coefficients of each polynomial term kj and bj, respectively. The coefficients βjl and γjl can be obtained by altering the Gj, recording the various kj and bj, and subsequently employing a polynomial for curve fitting.…”

“…Placing eddy current displacement (ECD) sensors against the inside or outside of the rotor is a standard method to measure the radial displacement of a BELSM rotor for CBP in liquids, as shown in Figs. 2 (a) and (b) [13][14][15][16][17], where light penetration for laser displacement measurement is challenging. The ECD sensors are required to face the high roundness, the nonsalient, and the no-tooth side surface of the rotor to detect the radial displacement of the rotor, and the side surface is referred to as a sensor target.…”