217542 ⎘
DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits having movable, e.g. turnable, iron parts
Multi-rotor permanent magnet synchronous motor
#2Modular electromagnetic device with reversible generator-motor operation
#3Electromagnetic device with reversible generator-motor operation
#4System for controlling motor speed by altering magnetic field of the motor