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. 26, 2002
Filed:
Apr. 28, 2000
Reto Schob, Volketswil, CH;
Thomas Gempp, Z{overscore (u)}rich, CH;
Levitronix LLC, Waltham, MA (US);
Abstract
An electrical rotary drive, designed as a bearingless motor, has a magnetically journalled rotor ( ) and a stator ( ) which comprises a drive winding ( ) having at least two loops ( ) for producing a magnetic drive field which produces a torque on the rotor ( ), and has a control winding ( ) having at least three loops ( ) for producing a magnetic control field by means of which the position of the rotor ( ) with respect to the stator ( ) can be regulated, with each loop ( ) of the drive winding ( ) belonging to a different electrical drive phase and each loop ( ) of the control winding ( ) belonging to a different electrical control phase, and having a setting device ( ) which supplies each loop ( ) of the drive winding ( ) and each loop ( ) of the control winding ( ) with a phase current or a phase voltage as a setting parameter, with the setting device ( ) being designed in such a manner that the setting parameter for each loop ( ) of the drive winding ( ) and for each loop ( ) of the control winding ( ) can be regulated independently of the setting parameters for the other loops.