公开(公告)号：US20200328645A1

公开(公告)日：2020-10-15

申请号：US16838195

申请日：2020-04-02

Applicant: Danfoss Editron OY

Inventor： Mikko Piispanen ,  Mika Bjorkholm ,  Juha Toikka ,  Tapani Siivo

IPC: H02K3/28 ,  H02K1/16 ,  H02K3/48 ,  H02K1/27 ,  H02K3/12 ,  H02K21/10

Abstract: An electric machine element comprises electric terminals (101) for connecting to an external AC system and a multiphase winding (102) comprising at least two multiphase winding portions (103, 104). Each multiphase winding portion comprises phase-windings (106a-106c, 107a-107c) each having a first end (109) and a second end (110). The multiphase winding portions are successively connected to constitute chains (113a-113c) of the phase-windings so that the first ends of the phase-windings of a first one (103) of the multiphase winding portions are connected to the electric terminals. Each multiphase winding portion comprises switches (114a, 114b, 115a, 115b) for connecting the second ends of the phase-windings of the multiphase winding portion to each other. Thus, the number of turns of the multiphase winding is changeable by selecting which one of the multiphase winding portions has a star-point at the second ends of its phase-windings.