Title :
Analysis of Three Synchronous Drive Modes for the Starting Performance of Spindle Motors
Author :
Lin, S. ; Bi, C. ; Jiang, Q. ; Phyu, H.N.
Author_Institution :
Data Storage Inst., Singapore
Abstract :
In sensorless operation of spindle motors in hard disk drives (HDD), open-looped starting is used to spin up the motor from standstill to a speed that is high enough to reliably detect back-electromotive force (back-EMF) generated in the armature windings. Then the back-EMF zero-crossing points (ZCP) will be used to detect speed and position for closed-looped control. This paper studies three open-looped starting modes for spindle motor. Six-step, which is currently used in HDD, twelve-step, and sine wave starting are illustrated and compared. The simulation results show that twelve-step and sine wave starting can obtain much better starting performance for spindle motors.
Keywords :
closed loop systems; disc drives; hard discs; open loop systems; permanent magnet motors; synchronous motors; back-EMF zero-crossing points; back-electromotive force; closed-looped control; hard disk drives; open-looped starting; sine wave starting; spindle motors; three-phase permanent magnet synchronous motor; twelve-step starting; Drives; Frequency; Friction; Hard disks; Performance analysis; Permanent magnet motors; Rotors; Synchronous motors; Torque; Voltage; Open-looped starting; six-step starting; spindle motor; twelve-step starting;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.902980
