The Stability of Magnetic Levitation Milling System Based on Modal Decoupling Control

Table 1

Electric spindle parameters.

m	Rotor mass	25.8 kg
	Radial electromagnet center distance	150 mm
Jx, Jy	Moment of inertia of the rotor around the x-axis	0.2251 kgm^2
Jz	Moment of inertia of the rotor around the z-axis	0.3388 kgm^2
	Radial electromagnetic bearing ideal air gap	0.4 × 10^−3 m
	Spindle radius	50 mm
	Current stiffness coefficient	37.7 N/A
	Displacement stiffness coefficient	15.08e4 N/m