Abstract :
Disk drives require very high-precision spindle motors for fast and accurate access of data. As storage capacity and access rate increase, more demands are being made of spindle motors with respect to both electrical and mechanical performances. For error-free operations, spindle motors are required to comply with a host of requirements, such as run-outs, both axial and radial, acoustics, mechanical vibrations, electromagnetic interference, contamination, etc. Compliance to these requirements necessitate careful and novel design techniques and highly sophisticated manufacturing processes. This paper discusses various requirements and specific design issues (electromagnetic design, mechanical design, motor control) for the development of spindle motors suitable for different form-factor drives using permanent magnet brushless DC motors
Keywords :
DC motor drives; brushless DC motors; hard discs; machine control; permanent magnet motors; small electric machines; acoustics; axial run-out; contamination; disk drive spindle motors; electrical performance; electromagnetic design; electromagnetic interference; error-free operations; form-factor drives; mechanical design; mechanical performance; mechanical vibrations; motor control; permanent magnet brushless DC motors; radial run-out; spindle motors; Acoustics; Brushless DC motors; Contamination; DC motors; Disk drives; Electromagnetic interference; Error-free operation; Manufacturing processes; Motor drives; Vibrations;
