Konecranes Plc

Danfoss Editron Oy

Danfoss A/s

Konecranes Global Corporation

Juha Toikka

Antti Tarkiainen

Aapo Jantunen

Mikko Piispanen

Risto Vilppo

Tapani Siivo

Johanna Kirjavainen

Mika Bjorkholm

Niko Ekholm

Mika Björkholm

Johanna Kari

An electric machine element comprises electric terminals () for connecting to an external AC system and a multiphase winding () comprising at least two multiphase winding portions (). Each multiphase winding portion comprises phase-windings (--) each having a first end () and a second end (). The multiphase winding portions are successively connected to constitute chains (-) of the phase-windings so that the first ends of the phase-windings of a first one () of the multiphase winding portions are connected to the electric terminals. Each multiphase winding portion comprises switches () 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.

Electric machine element and an electric machine

The monitoring of a brake is disclosed. The brake includes first and second braking surfaces and a magnetizing device arranged to move the braking surfaces to an open state, in which the braking surfaces are separated from each other, and to a closed state, in which the braking surfaces are connected to each other. During the monitoring of the brake, the time is measured that elapses from the change in the magnetic field caused by the magnetizing device to the shift of the braking surfaces from one state to another.

Monitoring of brake

Growing community of inventors

Lappeenranta, Finland

Juha Toikka