公开(公告)号：US11682995B2

公开(公告)日：2023-06-20

申请号：US17687804

申请日：2022-03-07

Applicant: Turntide Technologies Inc.

Inventor： Mahesh Krishnamurthy ,  Trevor Creary ,  Piyush Desai ,  Mark Johnston

IPC: H02P25/098 ,  H02K37/04

CPC classification number: H02P25/098 ,  H02K37/04 ,  H02K2213/03

Abstract: The present embodiment is a high rotor pole switched reluctance machine (HRSRM) which provides a plurality of combinations of the number of rotor poles Rn and number of stator poles Sn utilizing a numerical relationship defined by a mathematical formula, Rn=2Sn−Fp, when Sn=m×Fp, wherein Fp is the maximum number of independent flux paths in the stator when stator and rotor poles are fully aligned, and m is the number of phases. The mathematical formulation provides an improved noise performance and design flexibility to the machine. The mathematical formulation further provides a specific number of stator and rotor poles for a chosen m and Fp. The HRSRM can be designed with varying number of phases. The HRSRM provides a smoother torque profile due to a high number of strokes per revolution.

公开(公告)号：US11784599B2

公开(公告)日：2023-10-10

申请号：US17665548

申请日：2022-02-06

Applicant: Tokyo Institute of Technology ,  Turntide Technologies Inc.

Inventor： Akira Chiba ,  Candra Adi Wiguna ,  Jihad Furqani ,  Piyush Desai

IPC: H02P25/098

CPC classification number: H02P25/098

Abstract: An SR drive with an acoustic noise reduction system for reducing vibration and acoustic noise in a switched reluctance motor (SRM). The vibration and acoustic noise at specific harmonics of current excitation in SRM are in a proportional relationship with the radial force harmonics acting at SRM stator teeth. The acoustic noise reduction system includes a processor on which is installed an acoustic noise reduction application designed to derive an optimum current waveform for generating an average torque satisfying an optimum torque condition and creating radial force with minimum amplitude at the desired order of harmonics of current excitation. A reduction in the amplitude of the specific radial force harmonics utilizing the optimum current waveform minimizes the vibration and acoustic noise in the SRM. The acoustic noise reduction system applies turn-on and turn-off angles at the optimum current waveform to improve the system efficiency.

公开(公告)号：US20230253904A1

公开(公告)日：2023-08-10

申请号：US17665548

申请日：2022-02-06

Applicant: Tokyo Institute of Technology ,  Turntide Technologies Inc.

Inventor： Akira Chiba ,  Candra Adi Wiguna ,  Jihad Furqani ,  Piyush Desai

IPC: H02P25/098

CPC classification number: H02P25/098

Abstract: An SR drive with an acoustic noise reduction system for reducing vibration and acoustic noise in a switched reluctance motor (SRM). The vibration and acoustic noise at specific harmonics of current excitation in SRM are in a proportional relationship with the radial force harmonics acting at SRM stator teeth. The acoustic noise reduction system includes a processor on which is installed an acoustic noise reduction application designed to derive an optimum current waveform for generating an average torque satisfying an optimum torque condition and creating radial force with minimum amplitude at the desired order of harmonics of current excitation. A reduction in the amplitude of the specific radial force harmonics utilizing the optimum current waveform minimizes the vibration and acoustic noise in the SRM. The acoustic noise reduction system applies turn-on and turn-off angles at the optimum current waveform to improve the system efficiency.