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:
May. 26, 2015
Filed:
Mar. 23, 2011
Christian Gunselmann, Wuppertal, DE;
Mathias Fernengel, Dietzenbach, DE;
Nicolas Bruyant, Villeneuve Tolosane, FR;
Lionel Guichard, Toulouse, FR;
Michel Parette, Fonsorbes, FR;
Christian Gunselmann, Wuppertal, DE;
Mathias Fernengel, Dietzenbach, DE;
Nicolas Bruyant, Villeneuve Tolosane, FR;
Lionel Guichard, Toulouse, FR;
Michel Parette, Fonsorbes, FR;
Continental Automotive GmbH, , DE;
Abstract
A method for operating a brushless electric motor, the windings being energized by an inverter with the aid of six switches. A detection unit for detecting defective switches, a unit for measuring voltage at the outputs of the inverter, and a microcontroller for controlling the switch and for generating a pulse width modulated voltage supply for the windings are provided. A short-circuited switch causes a torque in the electric motor opposite the actuating direction of the electric motor. The method proposes that after detecting a short-circuited switch, the windings (U. V. W) are energized to generate a motor torque that is, on the whole, positive. An actuating period of the electric motor is divided into a plurality of sectors, wherein, in accordance with the defective switch, individual sectors are deactivated for the actuation of the windings (U, V, W), while other sectors are used to actuate the windings (V, W).