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. 09, 1982
Filed:
Jun. 06, 1980
Applicant:
Inventor:
Albert C Leenhouts, Harwinton, CT (US);
Assignee:
The Superior Electric Company, Bristol, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
318696 ;
Abstract
In the disclosed electro-mechanical system of a stepping motor and its control circuit, positive electrical damping is provided for avoiding loss of synchronism and loss of torque over the range of intermediate and high stepping frequencies by imposing a self-adjusting limit on the motor current over a period of time longer than any prominent period of parametric oscillation of the system and supplying current to the motor with a d-c supply having high impedance.