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1. (WO2018202410) ELECTRIC SYNCHRONOUS MOTOR

Pub. No.:    WO/2018/202410    International Application No.:    PCT/EP2018/059634
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Tue Apr 17 01:59:59 CEST 2018
IPC: H02K 29/03
H02K 1/27
H02K 3/04
H02K 3/47
H02K 1/14
Applicants: ATLAS COPCO INDUSTRIAL TECHNIQUE AB
Inventors: MILLINGER, Jonas, Gustav
Title: ELECTRIC SYNCHRONOUS MOTOR
Abstract:
The present disclosure relates to an electric synchronous motor for an electrical power tool. The electric synchronous motor (10) comprises a tubular rotor (11) magnetized to have circumferential polar alternations. The electric synchronous motor (10) further comprises a tubular slotless stator yoke (12) of ferromagnetic material. The tubular rotor (11) is magnetized to have two pairs o circumferential polar alternations and the stator (13) comprises three concentrically wound coils (14). The three concentrically wound coils (14) are assembled in a non-overlapping fashion inside the tubular stator yoke (12) to form a concentrated motor winding.