Abstract
Slotted motors are presently used in all hard disk drives (HDDs). However, the advantages of a slotless spindle providing low static cogging torque and negligible torque ripples would be required to meet the demands of the HDD industry, as indicated by the trends in increased capacity and smaller formats. The location of the windings in the airgap of a slotless machine resulting in an extended airgap produces lower inductance values, which will provide the drive with better dynamics. These features are discussed in this article. Aspects of the design and construction of a slotless permanent magnet (PM) motor are described and, where appropriate, comparisons are made with a slotted motor. Both motors are intended for use in a 3.5-inch, half-height HDD. The design of the slotless motor meets all the specifications for application in the HDD. The test and performance of the motor show that the slotless motor is superior in performance in comparison with the slotted motor.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
