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：US11264932B2

公开(公告)日：2022-03-01

申请号：US16945269

申请日：2020-07-31

Applicant: Turntide Technologies Inc.

Inventor： Trevor A. Creary ,  Mahesh Krishnamurthy ,  Piyush C. Desai ,  Mark Johnston ,  Timothy Knodel

IPC: H02K23/00 ,  H02P25/089 ,  H02P25/092

Abstract: A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. 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 apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter.

公开(公告)号：US20220190765A1

公开(公告)日：2022-06-16

申请号：US17681787

申请日：2022-02-27

Applicant: Turntide Technologies Inc.

Inventor： Trevor A. Creary ,  Mahesh Krishnamurthy ,  Piyush C. Desai ,  Mark Johnston ,  Timothy Knodel

IPC: H02P25/089 ,  H02P25/092

Abstract: A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. 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 apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter.

公开(公告)号：US11784598B2

公开(公告)日：2023-10-10

申请号：US17681787

申请日：2022-02-27

Applicant: Turntide Technologies Inc.

Inventor： Trevor A. Creary ,  Mahesh Krishnamurthy ,  Piyush C. Desai ,  Mark Johnston ,  Timothy Knodel

IPC: H02P25/08 ,  H02P25/089 ,  H02P25/092

CPC classification number: H02P25/089 ,  H02P25/092 ,  H02P2203/01 ,  H02P2205/01

Abstract: A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. 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 apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter.