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:
Oct. 23, 1990
Filed:
Apr. 29, 1988
Applicant:
Inventors:
Anton Rodi, Leimen, DE;
Michael Kruger, Edingen-Neckarhausen, DE;
Assignee:
Heidelberger Druckmaschinen AG, Heidelberg, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H02B / ;
U.S. Cl.
CPC ...
318372 ; 318280 ; 361355 ;
Abstract
A control circuit for an electric motor having a power control element containing a first semiconductor for driving the motor in one torque direction, and a power control element containing a second semiconductor for driving the motor in the other torque direction includes a circuit-breaker for at least isolating one of the power control elements, upon failure of the one power control element, and connecting the remainder of the circuit to the other power control element instead of the failed power control element.