Lappeenrannan Teknillinen Yliopisto

Saimaan Ammattikorkeakoulu Oy

Lappeenrannan-Lahden Teknillinen Yliopisto Lut

Tommi Nummelin

Juha Pyrhönen

Simo Sinkko

Anssi Suuronen

Juho Montonen

Juha Pyrhonen

An electric motor construction is provided with a planetary gear system, including an annular thin-rimmed stator () as well as a torque takeoff shaft () concentric relative thereto. The construction includes inside the stator () an annular thin-rimmed rotor (); a sun gear () fixedly coupled to the rotor and concentric with the takeoff shaft (); an intra-rotor immovably coupled ring gear () with a toothed inner surface; planet gears () meshing with the ring gear and the sun gear; a planet carrier () that the planet gears are supported on; as well as a coupling arrangement () for transmitting torque of the rotor optionally directly or by way of the planet carrier to the torque takeoff shaft.

Electrical motor construction provided with a planetary gear system

A magnetic actuator includes a collar element () and a toroidal coil () surrounding the collar element. The collar element is coupled in a torque transferring way to a shaft () surrounded by the collar element. The collar element is capable of sliding in the axial direction with respect to the shaft. The collar element includes indentations () for locking in a torque transferring way to a counter-part when the collar element is in a first axial position. The collar element includes permanent magnet material () for generating an axial force for moving the collar element to the first axial position when the toroidal coil carries electric current flowing in a first direction and to a second axial position when the toroidal coil carries electric current flowing in an opposite direction. Thus, no mechanical elements are needed for moving the collar element in the axial direction.

Magnetic actuator and a gear system comprising the same

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Lappeenranta, Finland

Tommi Nummelin