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公开(公告)号：US11682995B2
公开(公告)日：2023-06-20
申请号：US17687804
申请日：2022-03-07
IPC分类号： H02P25/098 , H02K37/04
CPC分类号： H02P25/098 , H02K37/04 , H02K2213/03
摘要： 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.
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2.发明授权公开(公告)号：US11784599B2
公开(公告)日：2023-10-10
申请号：US17665548
申请日：2022-02-06
发明人： Akira Chiba , Candra Adi Wiguna , Jihad Furqani , Piyush Desai
IPC分类号： H02P25/098
CPC分类号： H02P25/098
摘要： 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.
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3.发明授权公开(公告)号：US11784598B2
公开(公告)日：2023-10-10
申请号：US17681787
申请日：2022-02-27
IPC分类号： H02P25/08 , H02P25/089 , H02P25/092
CPC分类号： H02P25/089 , H02P25/092 , H02P2203/01 , H02P2205/01
摘要： 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.
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4.发明公开公开(公告)号：US20230253904A1
公开(公告)日：2023-08-10
申请号：US17665548
申请日：2022-02-06
发明人： Akira Chiba , Candra Adi Wiguna , Jihad Furqani , Piyush Desai
IPC分类号： H02P25/098
CPC分类号： H02P25/098
摘要： 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.
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公开(公告)号：US20230208336A1
公开(公告)日：2023-06-29
申请号：US18116508
申请日：2023-03-02
发明人： TREVOR CREARY , MAHESH KRISHNAMURTHY , TIM KNODEL
IPC分类号： H02P25/089 , H02P6/18
CPC分类号： H02P25/089 , H02P6/186 , H02P2203/01 , H02P2203/03 , H02P2203/09
摘要： A method for controlling switched reluctance machine (SRM) utilizing a SRM control system. The method allows for adaptive pulse positioning over a wide range of speeds and loads. An initial rotor position is provided for the SRM utilizing an initialization mechanism. A pinned point on a phase current waveform is defined during an initial current rise phase of the current waveform. A slope of the current rise is determined as the current waveform reaches the pinned point. The slope is then fed to the commutation module of the SRM control system. An error signal from calculated inductance or current slope is used as an input to a control loop in the SRM control system. The time determining module determines an optimum time signal to fire a next pulse. The optimum time signal is fed to the SRM for turning the plurality of SRM switches to on and off states.
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公开(公告)号：US20230163709A1
公开(公告)日：2023-05-25
申请号：US17917829
申请日：2021-04-08
发明人： Jacob Bayless , Nicholas Nagel
IPC分类号： H02P25/089 , H02P25/098 , H02P6/18
CPC分类号： H02P25/089 , H02P25/098 , H02P6/18 , H02P2203/01
摘要： 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.
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公开(公告)号：US20220286074A1
公开(公告)日：2022-09-08
申请号：US17750503
申请日：2022-05-23
IPC分类号： H02P25/089 , H02P6/185 , H02P6/18
摘要： A system and method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system. The method comprising: energizing at least one of the plurality of stator phases; measuring a first current value and time taken by the first current value to reach a first peak value or preset threshold value of current; determining a self-inductance value; measuring a second current value and time taken by an adjacent un-energized stator phase to reach a second peak value of current; determining a mutual inductance value; and estimating a rotor position utilizing the self-inductance and mutual inductance values; and controlling the HRSRM based on the estimated rotor position.
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公开(公告)号：US20220190766A1
公开(公告)日：2022-06-16
申请号：US17687804
申请日：2022-03-07
IPC分类号： H02P25/098 , H02K37/04
摘要： 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.
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9.发明申请公开(公告)号：US20220190765A1
公开(公告)日：2022-06-16
申请号：US17681787
申请日：2022-02-27
IPC分类号： H02P25/089 , H02P25/092
摘要： 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.
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公开(公告)号：US11342872B2
公开(公告)日：2022-05-24
申请号：US17239566
申请日：2021-04-24
IPC分类号： H02P25/08 , H02P25/089 , H02P6/185 , H02P6/18
摘要： A system and method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system. The method comprising: energizing at least one of the plurality of stator phases; measuring a first current value and time taken by the first current value to reach a first peak value or preset threshold value of current; determining a self-inductance value; measuring a second current value and time taken by an adjacent un-energized stator phase to reach a second peak value of current; determining a mutual inductance value; and estimating a rotor position utilizing the self-inductance and mutual inductance values; and controlling the HRSRM based on the estimated rotor position.
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