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. 13, 1979
Filed:
Jun. 30, 1977
Herbert Auinger, Nuremberg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A pole changeable three phase winding for a fractional pole pair ratio p.sub.1 :p.sub.2 = (3m .+-. 1)/3n with p.sub.2 = 3n being an integral multiple of the number of phases and m and n being positive integers. Each phase winding for the first number of poles 2p.sub.1 consists of 2p.sub.1 /t equal winding branches, of which a number G, divisible by three, of so-called base winding-branches carry current for the first number of poles 2p.sub.1 and for the second number of poles 2p.sub.2, where one third of each of the base winding branches, for the second number of poles 2p.sub.2, are assigned to all three phase windings. The remaining number N of winding branches are designed as zero branches which are ineffective for the second number of poles 2p.sub.2, so that a division into G base winding branches and N zero branches according to G + N = 2p.sub.1 /t takes place, where t is an integral divisor of 2p.sub.1.