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:
Feb. 17, 2009
Filed:
Apr. 03, 2007
Sten Ritschel, Bannewitz, DE;
Sten Ritschel, Bannewitz, DE;
Saia-Burgess Dresden GmbH, Dresden, DE;
Abstract
A circuit arrangement () for generating motor characteristic curves, in particular for stabilizing the pull-out torque of a two-phase synchronous motor () by using a series-connected element (). The series-connected element () is connected between a first line conductor () formed as a neutral conductor and the common phase () of the synchronous motor (), and a second line conductor () implemented as a conductor is connected with a phase of the synchronous motor (). A transistor-diode combination () is employed as a voltage-controllable series-connected element (), whereby for obtaining an approximately constant sinusoidal AC voltage amplitude and/or AC current amplitude through the synchronous motor (), the transistor () designed for the maximum peak voltage of the oscillating line voltage and having an operating point controllable by an analog control signal is a non-switched bipolar transistor or field effect transistor (FET), and the diodes () are implemented as a rectifier bridge ().