The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 1997
Filed:
Nov. 20, 1995
Ben Huang, Palo Alto, CA (US);
Albert Hartman, Palo Alto, CA (US);
Quantum Corporation, Milpitas, CA (US);
Abstract
A ten pole/twelve slot brushless DC motor for a disk drive spindle includes a base; a cylindrical rotor structure rotating relative to the base and a generally symmetrically slotted stator structure fixed about an axis of rotation. The rotor structure includes a permanent magnet ring structure defining ten permanently magnetized alternating north-south magnet segments. The stator structure includes a ferromagnetic core defining twelve stator slots between twelve stator poles. Coils of insulated wire are wound around the stator poles in one of a plurality of disclosed winding patterns and connected into a series of phases, e.g. three phases.