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. 15, 2018
Filed:
Oct. 15, 2013
Robert Bosch Gmbh, Stuttgart, DE;
Patrick Heuser, Stuttgart, DE;
Miguel Ruiz De Larramendi, Ludwigsburg, DE;
Mercedes Herranz Gracia, Forchheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention relates to an asynchronous machine () as can be used particularly in electric vehicles or hybrid vehicles. The asynchronous machine () has a rotor () and a stator (). The asynchronous machine is designed and controlled in such a manner that it has a pole pair number p of p=3. Because of the reduced yoke saturation that can consequently be achieved, the stator yoke () can be designed with a lesser height hy, such that a ratio of the outer rotor diameter Dto the outer stator diameter Dcan assume values between 0.7 and 0.8. As a result, enlarged rotor teeth () and correspondingly enlarged rotor grooves () can be formed in the rotor (), such that electrical losses in the material in the rotor grooves () acting as the rotor coil element () are smaller in comparison to conventional asynchronous machines. The electrical losses occurring to a greater extent in the stator () compensating for this lead to a lesser warming of the stator () than would be the case with the rotor () as the stator () can be cooled by simple means. Overall, a higher continuous torque can thus be achieved with the asynchronous machine () according to the invention.