| 摘要 |
The invention relates to an electronic braking device for asynchronous motors particularly for asynchronous motor equipped with magnetic suspensions such as those employed in turbomolecular pumps, comprising a circuit for recovering the kinetic energy of the rotor during the decelerating phase due to the absence of feeding electric current from the mains, which is adapted to return an electric current that can be used for the emergency feeding the magnetic suspensions (8). Such circuit can further comprise an auxiliary battery (10) for feeding a circuit (9) controlling the magnetic suspensions (8) during the final phase of the stopping cycle of the motor (5) caused by the absence of mains current. <IMAGE> |
