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:
Apr. 06, 1982
Filed:
Sep. 21, 1979
Peter Bradler, Wurzburg, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A commutator motor can be set to different speeds by changing the external circuit connections between the single phase AC supply line and the stator field winding. The field winding is distributed in slots over at least part of the circumference of the stator bore and the field winding connection is switched, when going from a lower to a higher speed, in such a way that the axis of the stator field is rotated in the direction of rotation of the motor. For improved performance, the number of excitation turns may also be changed, simultaneously with the rotation of the field axis. The motor is particularly useful for automatic washing machine drives having a universal motor.