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:
Mar. 26, 1985
Filed:
Jul. 15, 1983
Applicant:
Inventor:
Kiyoshi Miyazaki, Nagano, JP;
Assignee:
Kabushiki Kaisha Sankyo Seiki Seisakusho, Nagano, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318254 ; 318313 ; 318602 ;
Abstract
A brushless DC motor utilizing only a single position detector and which provides a uniform torque output characteristic with little or no vibration. N phase drive coils are fixedly mounted on a stator yoke. A magnetic rotor assembly, which is rotated by the drive coils, is coupled to rotate a rotary encoder on which m tracks of digitally coded waveform data are recorded. A single m-channel stationary detecting element detects the waveform data produced by rotating the rotary encoder to provide an m-bit parallel signal. The m-bit parallel signal is code converted and applied through power amplifiers to drive the drive coils.