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:
Jan. 15, 1985
Filed:
Sep. 28, 1982
Applicant:
Inventor:
Wilhelm Leitgeb, Bad Neustadt, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
318138 ; 318254 ; 363132 ;
Abstract
In a commutating device for an electric motor which is supplied from a d-c voltage source, which includes semiconductor switching elements arranged in a bridge circuit and addressed by means of a control voltage in dependence on the rotor position of the motor, in order that the semiconductor switching elements can be addressed without transformers and without separate control voltage sources, the residual voltage dropping across the load circuit of the semiconductor switching elements and/or the inverse voltage stored in the respectively preceding cut-off phase is used as the control voltage.