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1. (WO2018157876) METHOD FOR TRICKLE IMPREGNATION OF THE STATOR OR ARMATURE OF AN ELECTRIC MACHINE

Pub. No.:    WO/2018/157876    International Application No.:    PCT/DE2018/000033
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Mon Feb 19 00:59:59 CET 2018
IPC: H02K 15/12
H05B 6/02
H05B 6/10
H05B 6/06
Applicants: COPPERING GMBH
Inventors: BERTHOLD, Jens
SCHNEIDER, Stefan
RASP, Richard A.
Title: METHOD FOR TRICKLE IMPREGNATION OF THE STATOR OR ARMATURE OF AN ELECTRIC MACHINE
Abstract:
The invention relates to a method for the trickle impregnation of the stator (2) or armature of an electric machine with a synthetic resin (5) that hardens with an increase in temperature, said method comprising the following steps: a) heating the stator (2) or armature from a starting temperature (T1) to a trickle temperature range (T2-T3) of the initially still liquid synthetic resin (5) during a first time interval (t0 - t1), b) maintaining the temperature constant in the trickle temperature range (T2-T3) and introducing the still liquid plastic resin (5) into the stator (2) or armature during a second time interval (t1— t2), c) heating the stator (2) or armature to a hardening temperature range (T4-T5) during a third time interval (t2 - t3), d) maintaining constant the temperature of the stator (2) or armature in the hardening temperature range (T4, T5) during a fourth time interval (t3 - t4) and binding and hardening the synthetic resin (5) to form a duroplast, and e) cooling the stator (2) or armature at the end of the fourth time interval (t3 - t4), the stator (2) or armature being arranged in an impregnation device (1) while the liquid synthetic resin (5) is introduced, and the trickle temperature range (T2, T3) having lower temperatures than the hardening temperature range (T4 - T5). According to the invention, the heating of the stator (2) or armature is inductively carried out.