Title :
Back-EMF ZCP error induced by EM structure of spindle motor
Author :
Chao Bi ; Nu Phyu Hla ; Quan Jiang ; Cheng Su Soh
Author_Institution :
Data Storage Inst., Singapore, Singapore
Abstract :
In a hard disk drive (HDD), the zero crossing points (ZCPs) of back-emf generated in the spindle motor armature windings are used as rotor position signal for realizing precision motor speed control. The error of ZCP is thus very concerned in HDD products, especial for the HDDs with ultrahigh data recording density. In the paper, several reasons inducing the ZCP error are analyzed, and these reasons are from the problems in the motor design and production. Both the analytical and numerical methods are used in the analysis to analyze the influence of the electromagnetic structure to the ZCP. The related solutions are proposed to reduce the errors of the ZCP in the motor design.
Keywords :
disc drives; hard discs; machine windings; micromotors; numerical analysis; EM structure; HDD; ZCP; back-EMF ZCP error; electromagnetic structure; hard disk drive; motor design; numerical methods; precision motor speed control; rotor position signal; spindle motor; spindle motor armature windings; ultrahigh data recording density; zero crossing points; Commutation; Electronic mail; Finite element methods; Lead; Magnetic domains; Windings; back-emf; data recording; magnetic motive force; permanent magnet; speed control; speed error; synchronous motor drives; winding;
Conference_Titel :
APMRC, 2010 Digest
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-8103-3
