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:
Aug. 18, 1987
Filed:
Jul. 01, 1986
Applicant:
Inventor:
Georg Heinle, Erlangen, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
363 96 ; 363137 ;
Abstract
If the output current or the output voltage of a frequency converter is to occupy a respective predetermined phase angle, the output currents or output voltages defining a respective 60.degree. el sector are switched alternatingly with a corresponding pulse/pause ratio. The period of the latter is chosen so that it is a minimum in the center of each 60.degree. el sector and is a maximum at the edge of each sector. Thereby, minimum pulse times are kept also at the edge of the sectors without excessive decrease of the average frequency for the pulsing.