公开(公告)号：US20170310249A1

公开(公告)日：2017-10-26

申请号：US15496518

申请日：2017-04-25

Applicant: Dyson Technology Limited

Inventor： Libo ZHENG ,  Min ZHANG

IPC: H02P1/46 ,  H02P3/14

CPC classification number: H02P1/46 ,  H02P1/029 ,  H02P3/14

Abstract: A method is described for controlling an electric motor having a rotor. The method is carried out after a shutdown of the motor has been initiated. The method includes starting a timer in a motor controller, performing regenerative braking to recapture kinetic energy from the rotor as electrical energy, and using the recaptured electrical energy from the regenerative braking to power the motor controller. If the timer in the motor controller exceeds a predetermined timer value, a flag is set in memory in the motor controller to indicate that the motor has stopped.

公开(公告)号：US20220190751A1

公开(公告)日：2022-06-16

申请号：US17685258

申请日：2022-03-02

Applicant: Dyson Technology Limited

Inventor： Libo ZHENG ,  Min ZHANG

IPC: H02P1/46 ,  H02P3/14 ,  H02P1/02

Abstract: A method is described for controlling an electric motor having a rotor. The method is carried out after a shutdown of the motor has been initiated. The method includes starting a timer in a motor controller, performing regenerative braking to recapture kinetic energy from the rotor as electrical energy, and using the recaptured electrical energy from the regenerative braking to power the motor controller. If the timer in the motor controller exceeds a predetermined timer value, a flag is set in memory in the motor controller to indicate that the motor has stopped.