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1. (WO2017190720) ELECTRIC MACHINE HAVING WATER AND AIR COOLING

Pub. No.:    WO/2017/190720    International Application No.:    PCT/DE2017/000090
Publication Date: Fri Nov 10 00:59:59 CET 2017 International Filing Date: Thu Apr 06 01:59:59 CEST 2017
IPC: H02K 1/20
H02K 1/32
H02K 5/04
H02K 5/18
H02K 5/22
H02K 9/04
H02K 9/19
Applicants: KREBS & AULICH GMBH
Inventors: KREBS, Jörg
VOIGT, Matthias
Title: ELECTRIC MACHINE HAVING WATER AND AIR COOLING
Abstract:
The invention relates to an electric machine (1) designed as a motor and/or as a generator, comprising a housing (2), a stator (3) arranged in the housing (2), and a rotor (4) arranged coaxially and radially inside the stator (3), between which an air gap (5) is formed, wherein the rotor (4) has a central axial bore (9) which can be connected to a cooling air source (10a) and to a cooling air sink (10b), and in which bore at least one channel (6) for cooling the stator (3) is provided, which channel can be connected to a cooling water source (7) and to a cooling water sink (8). In order to optimize the cooling of the electric machine (1) and in particular the rotor (4) thereof, according to the invention, the cooling air source (10a) and the cooling air sink (10b) are formed by a heat exchanger (11).