Lappeenrannan Teknillinen Yliopisto

Saimaan Ammattikorkeakoulu Oy

Janne Nerg

Juha Pyrhönen

Robert Semken

Yulia Alexandrova

Maria Polikarpova

Hanne Jussila

Pekka Röyttä

Timo Pukki

Jussi Sopanen

Aki Lipponen

Robert Scott Semken

Pekka Roytta

Juha Pyrhonen

A stator of an electrical machine includes a stator core having a plurality of stator teeth and stator slots, and a stator winding having a plurality of stator coils. The width of each stator coil is one stator slot pitch, and the stator teeth are shaped to allow each stator coil to be installed by pushing the stator coil to surround one of the stator teeth. The stator coils include tubular cooling channels for conducting cooling liquid in the stator slots.

Electric machine with modular stator coils and cooling tubes

A rotor axle of a high speed permanent magnet machine including a first part and a second part, both manufactured from a magnetically non-conducting material. The parts include an inner end and an outer end, and they can be axially interconnected one after the other by the inner ends to constitute an integral rotor axle. Their outer ends include bearing structures to fit the rotor axle with bearings. A cylindrical and solid permanent magnet is provided coaxially with the first part and the second part in between them and magnetized perpendicularly to the axial direction of the cylinder. The inner end of the first part of the rotor axle includes a cylindrical external surface with an external thread, the inner end of the second part includes a cylinder sleeve having an internal base part corresponding in shape to the cylindrical permanent magnet to constitute a space for the permanent magnet.

Rotor axle of a high speed permanent magnet machine

Growing community of inventors

Lappeenranta, Finland

Janne Nerg