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:
Oct. 02, 2001
Filed:
May. 16, 2000
Jörg Roth-Stielow, Bretten, DE;
Josef Schmidt, Graben-Neudorf, DE;
Sew-Eurodrive GmbH & Co., Bruchsal, DE;
Abstract
A three-phase a.c. motor for operation with a three-phase mains supply (,), with three single- or multiple-strand windings (,) in a star configuration (,) in which terminals (U,, V,, W,) at the neutral ends of the windings (,) are accessible outside the set of windings (,), with an electronic switch (,) so constructed and so connected by way of switch terminals (U,, V,, W,) to the neutral-end terminals (U,, V,, W,) that the latter can be electrically connected to one another during a process of turning on and disconnected from one another during a process of turning off, and with a control circuit (,) designed to control the electronic switch (,) and connected to the latter. By integration of the electronic switch (,) and the control circuit (,) within the terminal box of the three-phase motor, both the space required and the number of electronic components can be dramatically reduced in comparison to known three-phase motors.