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:
Apr. 17, 1984
Filed:
Sep. 08, 1981
Applicant:
Inventor:
Shigeru Araki, Tamayama, JP;
Assignee:
Alps Electric Co., Ltd., Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
318696 ; 318685 ;
Abstract
A stepping motor-control circuit based on the micro-step control comprises an up-down-counter, a circuit for determining an excitation sequence for respective phases of the stepping motor in accordance with a count output of the counter, and a circuit for generating a stepped waveform excitation signal in accordance with the count output of the counter, so that the excitation state of each phase of the stepping motor is controlled in a stepped waveform consisting of a plurality of steps. The stepping motor is permitted to operate at high speed by raising the frequency of a reference clock signal applied thereto.