Invention Grant
- Patent Title: Asynchronous machine with optimized distribution of electrical losses between stator and rotor
-
Application No.: US14650431Application Date: 2013-10-15
-
Publication No.: US09973050B2Publication Date: 2018-05-15
- Inventor: Patrick Heuser , Miguel Ruiz De Larramendi , Mercedes Herranz Gracia
- Applicant: Robert Bosch GmbH
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Michael Best & Friedrich LLP
- Priority: DE102012222616 20121210
- International Application: PCT/EP2013/071473 WO 20131015
- International Announcement: WO2014/090440 WO 20140619
- Main IPC: H02K3/28
- IPC: H02K3/28 ; H02K17/16 ; H02K1/16 ; H02K17/20 ; H02K3/12

Abstract:
The invention relates to an asynchronous machine (1) as can be used particularly in electric vehicles or hybrid vehicles. The asynchronous machine (1) has a rotor (5) and a stator (3). 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 (9) can be designed with a lesser height hy1, such that a ratio of the outer rotor diameter D2a to the outer stator diameter D1a can assume values between 0.7 and 0.8. As a result, enlarged rotor teeth (19) and correspondingly enlarged rotor grooves (21) can be formed in the rotor (5), such that electrical losses in the material in the rotor grooves (21) acting as the rotor coil element (23) are smaller in comparison to conventional asynchronous machines. The electrical losses occurring to a greater extent in the stator (3) compensating for this lead to a lesser warming of the stator (3) than would be the case with the rotor (5) as the stator (3) can be cooled by simple means. Overall, a higher continuous torque can thus be achieved with the asynchronous machine (1) according to the invention.
Public/Granted literature
- US20150311759A1 ASYNCHRONOUS MACHINE WITH OPTIMIZED DISTRIBUTION OF ELECTRICAL LOSSES BETWEEN STATOR AND ROTOR Public/Granted day:2015-10-29
Information query