公开(公告)号：US20230163709A1

公开(公告)日：2023-05-25

申请号：US17917829

申请日：2021-04-08

Applicant: Turntide Technologies Inc.

Inventor： Jacob Bayless ,  Nicholas Nagel

IPC: H02P25/089 ,  H02P25/098 ,  H02P6/18

CPC classification number: H02P25/089 ,  H02P25/098 ,  H02P6/18 ,  H02P2203/01

Abstract: A method and an apparatus for sensorless profiling of a current waveform in a switched-reluctance motor (SRM) is disclosed. The apparatus comprises a switched-reluctance motor having at least one stator pole and at least one rotor pole, a phase inverter controlled by a processor, a load, a converter and a software control module at the processor. The current waveform sets a target magnitude for a programmable dwell angle that scales a programmable waveform shape. Slope of the current is continuously monitored which allows the shaft speed to be updated multiple times and to track any change in speed and fix the dwell angle based on the shaft speed. The method reduces the overall radial force magnitude by compensating nonlinear torque production thereby reducing the acoustic noise reduction and torque ripple which results in computational efficiency of the SRM.