公开(公告)号：US12057793B2

公开(公告)日：2024-08-06

申请号：US17918324

申请日：2022-05-27

Applicant: Changsha University of Science and Technology

Inventor： Hui Cai

IPC: H02P21/18 ,  H02P25/08

CPC classification number: H02P21/18 ,  H02P25/08 ,  H02P2203/01

Abstract: The present invention discloses an all-speed-range estimation method for a rotor position of a switched reluctance motor. Under a low-speed working condition, a sector is selected for triggering according to comparison between a current response value and a current threshold, so as to determine the rotor position of the motor; under a medium-speed working condition, the rotor position of the motor is determined, according to a change of the number of injected pulses with the motor speed, by querying a preset data table; under a high-speed working condition, a capacitor charging loop is designed since there is a small number of injected pulses; a response current formed by during injection of a pulse voltage charges a capacitor; the capacitor is detected to measure a voltage; and the rotor position is determined by querying a preset voltage-rotor position data table according to a voltage value.

公开(公告)号：US20240213899A1

公开(公告)日：2024-06-27

申请号：US17918324

申请日：2022-05-27

Applicant: Changsha University of Science and Technology

Inventor： Hui Cai

IPC: H02P21/18 ,  H02P25/08

CPC classification number: H02P21/18 ,  H02P25/08 ,  H02P2203/01

Abstract: The present invention discloses an all-speed-range estimation method for a rotor position of a switched reluctance motor. Under a low-speed working condition, a sector is selected for triggering according to comparison between a current response value and a current threshold, so as to determine the rotor position of the motor; under a medium-speed working condition, the rotor position of the motor is determined, according to a change of the number of injected pulses with the motor speed, by querying a preset data table; under a high-speed working condition, a capacitor charging loop is designed since there is a small number of injected pulses; a response current formed by during injection of a pulse voltage charges a capacitor; the capacitor is detected to measure a voltage; and the rotor position is determined by querying a preset voltage-rotor position data table according to a voltage value.