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公开(公告)号：US20190160321A1
公开(公告)日：2019-05-30
申请号：US16205734
申请日：2018-11-30
Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION
Inventor： Muzaffer Y. Ozsecen , Owen K. Tosh , Rakesh Mitra , Zaki Ryne , Prerit Pramod
Abstract: According to one or more embodiments, a biomechanical assistive device is described that generates and provide assist torque by detecting user intent. An example biomechanical assistive device includes a motor, and a controller that generates a torque command for providing assist torque using the motor based on a user activity being performed using the biomechanical assistive device. The controller determines a stride frequency based on a position signal indicative of a position of a joint of the biomechanical assistive device. The controller dynamically adjusts the torque command based on the stride frequency to generate a final torque command. The controller applies the final torque command to the motor.
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公开(公告)号：US20180257698A1
公开(公告)日：2018-09-13
申请号：US15457411
申请日：2017-03-13
Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION
Inventor： Zaki Ryne , Rakesh Mitra , Tao Yang , Scott T. Sanford , Michael R. Story
CPC classification number: B62D5/0463 , B62D5/0421 , B62D5/0457 , B62D6/007 , B62D6/04 , B62D6/08 , G05B13/0265
Abstract: Technical features of a steering system include a control module that dynamically determines an operating mode based on a set of input signal values such as lateral acceleration signal values and corresponding handwheel position values. The control module dynamically determines and learns classification boundaries between multiple operating modes based the input signal values. The control module further calibrates the steering system according to operating mode that is determined using the classification boundaries.
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公开(公告)号：US09985564B2
公开(公告)日：2018-05-29
申请号：US15054554
申请日：2016-02-26
Applicant: Steering Solutions IP Holding Corporation
Inventor： Prerit Pramod , Rakesh Mitra
CPC classification number: H02P21/141 , G01P3/44 , G01R33/0385 , G01R33/04 , H02P21/18
Abstract: A system for estimating flux linkage in an electric motor includes a flux estimation module that generates estimated flux linkages based on a back electromagnetic force and estimated velocity of the electric motor, the flux linkages having an alpha flux linkage component and a beta flux linkage component, and a velocity estimation module that generates an estimated motor velocity based on the back electromagnetic force and the estimated flux linkages.
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Patent Agency Ranking
公开(公告)号：US11804799B2
公开(公告)日：2023-10-31
申请号：US16836822
申请日：2020-03-31
Applicant: Steering Solutions IP Holding Corporation
Inventor： Prerit Pramod , Rakesh Mitra , Darren Qu , Subhra Paul , Julie A. Kleinau
IPC: H02P29/024 , B62D5/04 , H02P6/185
CPC classification number: H02P29/0243 , B62D5/046 , H02P6/185
Abstract: A system for controlling a synchronous motor drive may be configured to receive a command voltage signal and to identify, in the synchronous motor drive, a resistance imbalance signature from the command voltage signal. The system may determine, based on the resistance imbalance signature, respective phase resistances that correspond to phases of a synchronous motor of the synchronous motor drive. Each respective phase resistance may include a phase transistor resistance and a phase winding resistance. The system may identify, based on the phase resistances and an estimated average resistance between the phases of the synchronous motor, one or more phases of the synchronous motor that correspond to one or more phase resistances representing a resistance imbalance.
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公开(公告)号：US10822024B2
公开(公告)日：2020-11-03
申请号：US15804281
申请日：2017-11-06
Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION
Inventor： Prerit Pramod , Rakesh Mitra , Rangarajan Ramanujam
IPC: B62D5/04 , H02P7/285 , H02P29/032
Abstract: Technical solutions are described for current sensor fault mitigation for systems with permanent magnet DC drives. An example power steering system includes a brush motor, and a motor control system that generates an amount of torque using the brush motor, the amount of torque corresponding to a torque command. The motor control system includes a current sensor fault detector that detects a current sensor fault associated with a current sensor used to measure a current across the brush motor. The motor control system further includes a velocity observer that computes an estimated motor velocity in response to the current sensor fault. The motor control system further includes a feedforward controller that generates a current command for generating the amount of torque using the brush motor, the current command generated using the estimated motor velocity.
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公开(公告)号：US20190389505A1
公开(公告)日：2019-12-26
申请号：US16013370
申请日：2018-06-20
Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION
Inventor： Prerit Pramod , Varsha Govindu , Rakesh Mitra , Nithil Babu Nalakath
Abstract: Technical solutions are described for a motor control system to control a permanent magnet DC (PMDC) machine. An example motor control system includes one or more sensors for measuring an output current of the PMDC machine. The motor control system further includes a current regulator that generates a voltage command corresponding to an input current command for generating an amount of torque using the PMDC machine. The current regulator includes a current command compensator that generates a first voltage command based on the input current command received by the current regulator. The current regulator further includes a feedback compensator that generates a second voltage command based on the output current measured by the one or more sensors. The current regulator also includes an adder configured that generates the voltage command by adding the first voltage command and the second voltage command.
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公开(公告)号：US10404197B2
公开(公告)日：2019-09-03
申请号：US15715375
申请日：2017-09-26
Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION
Inventor： Perit Pramod , Rakesh Mitra
IPC: H02P7/06
Abstract: Technical solutions are described for a motor control system that includes a feedforward control module to control an output torque generated by the motor. The feedforward controlling includes computing a first voltage command for the motor based on an input torque signal. Further, the feedforward controlling includes computing a second voltage command for the motor based on a brush drop voltage of the motor and a back-EMF drop voltage of the motor. Further, feedforward controlling includes computing a voltage command for the motor by summing the first voltage command and the second voltage command. Further yet, the feedforward controlling includes sending the voltage command to the motor for generating the output torque.
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公开(公告)号：US20190135331A1
公开(公告)日：2019-05-09
申请号：US15804281
申请日：2017-11-06
Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION
Inventor： Prerit Pramod , Rakesh Mitra , Rangarajan Ramanujam
CPC classification number: B62D5/049 , B62D5/046 , B62D5/0481 , H02P7/285 , H02P29/032 , H02P2205/01
Abstract: Technical solutions are described for current sensor fault mitigation for systems with permanent magnet DC drives. An example power steering system includes a brush motor, and a motor control system that generates an amount of torque using the brush motor, the amount of torque corresponding to a torque command. The motor control system includes a current sensor fault detector that detects a current sensor fault associated with a current sensor used to measure a current across the brush motor. The motor control system further includes a velocity observer that computes an estimated motor velocity in response to the current sensor fault. The motor control system further includes a feedforward controller that generates a current command for generating the amount of torque using the brush motor, the current command generated using the estimated motor velocity.
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