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. 23, 1982
Filed:
Feb. 07, 1980
Ryo Akiyama, Sakai, JP;
Makoto Gotou, Kadoma, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A motor speed control apparatus includes a motor, a frequency generator for generating a detective frequency signal, the frequency of which is proportional to the motor speed, and a control signal generator. A rotational speed-error pulse train is produced by the control signal generator and is used for improving the load characteristics of the motor. The rotational speed of the motor is maintained constant at a predetermined speed, which is proportional to the reference frequency, for any load torque, the motor speed is not influenced by ambient temperature changes or long term characteristic variations of the electronic components utilized. Furthermore, the transient response of the motor is fast and the motor starts rotating smoothly and stably.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile