Brushless electric-motor for linear drive for robot toy, has permanent magnet housed in rotor having translational degree of freedom for linear movement, and stator comprising multiple coils that generate rotating magnetic field

摘要

The motor has a permanent magnet (1) housed in a rotor having a degree of freedom for a translational linear movement (6) along an axis of the rotor. A stator comprises multiple coils, which generate a rotating magnetic field about the rotor axis. An external thread (2) of the rotor comprises a first mechanical device, and an internal thread (3) of the stator comprises a second mechanical device, where the first and second mechanical devices are directly coupled with each other. A rotor position is determined by a sensor at a rotation direction.