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:
Nov. 09, 1999
Filed:
Jan. 02, 1997
Yasuhiro Okada, Yonago, JP;
Tadashi Itami, Yonago, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
A motor drive apparatus used in a motor for controlling a rotor therein to rotate in regular and reverse directions includes a rotating direction detecting circuit for detecting a first direction in which rotor is rotating. A comparator compares a command signal with a reference signal to detect a second direction in which the rotor should rotate. A motor driver comprised of buffer amplifiers and power supply circuits is provided to rotate the rotor based on the command signal. A command signal generator produces a drive signal which is transferred to the power supply circuits through a switch when the first and second directions are both identical to the reverse direction.