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公开(公告)号：US11774936B2
公开(公告)日：2023-10-03
申请号：US17030683
申请日：2020-09-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rakesh Raja , Sudhir Nagaraj , Sooping Saw
Abstract: A method for electrically producing a stalled state in a stepper motor having a first coil and a second coil is provided. The method includes driving a first sinusoidal current through the first coil, and driving a second sinusoidal current through the second coil, wherein the first and second sinusoidal currents are in phase.
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公开(公告)号：US11218072B2
公开(公告)日：2022-01-04
申请号：US16459814
申请日：2019-07-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajarshi Mukhopadhyay , Sooping Saw , Anuj Jain
IPC: H02P6/08 , H02M1/44 , H02M7/5387 , H02M1/00
Abstract: Modulating a gate drive current supplied to an output drive switch coupled to an electric motor by performing at least the following: obtain a gate drive current modulation profile, supply, based on the gate drive current modulation profile, a first gate drive current level as the gate drive current when the output drive switch is operating within a first region, drop the first gate drive current level to a second gate drive current level when the output drive switch transitions from the first region to operating within a Miller region, increase the second gate drive current level to a third gate drive current level within the Miller region, and set the gate drive current to a fourth gate drive current level when the output drive switch transitions from the Miller region to operating within a third region.
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公开(公告)号：US11101754B2
公开(公告)日：2021-08-24
申请号：US16869617
申请日：2020-05-08
Applicant: Texas Instruments Incorporated
Inventor： Sooping Saw , Rakesh Raja , Wen Pin Lin , Sudhir Nagaraj
Abstract: In one embodiment, a method includes detecting, by a stall detection sensor in a driver coupled to a stepper motor, a first set of time-off periods in a rising commutation phase of motor current during current regulation. The stall detection sensor further detects a second set of time-off periods in a falling commutation phase of motor current during current regulation. Next, the stall detection sensor compares the first set of time-off periods with the second set of time-off periods and determines whether the stepper motor is stalled based on the comparison of the first set of time-off periods with the second set of time-off periods.
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公开(公告)号：US10824130B2
公开(公告)日：2020-11-03
申请号：US16263766
申请日：2019-01-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rakesh Raja , Sudhir Nagaraj , Sooping Saw
Abstract: A method for electrically producing a stalled state in a stepper motor having a first coil and a second coil is provided. The method includes driving a first sinusoidal current through the first coil, and driving a second sinusoidal current through the second coil, wherein the first and second sinusoidal currents are in phase.
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公开(公告)号：US20170366123A1
公开(公告)日：2017-12-21
申请号：US15619128
申请日：2017-06-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sooping Saw , Rakesh Raja , Anuj Jain , Matthew Hein
IPC: H02P8/14
CPC classification number: H02P8/14
Abstract: In a described example an apparatus includes: an FET driver circuit configured to supply current to a coil in a stepper motor, the FET driver circuit configured to regulate the current to the coil using a fixed delta current; a current chopper pulse width modulated circuit coupled to the FET driver circuit configured to supply pulses corresponding to a step control signal and a direction control signal; a back electromotive force (BEMF) monitor coupled to the current chopper circuit configured to measure an off time pulse and to output a BEMF monitor signal; and a controller coupled to the current chopper pulse width modulated circuit to supply the step and direction control signals and coupled to receive the BEMF monitor signal.
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Patent Agency Ranking
公开(公告)号：US10686391B2
公开(公告)日：2020-06-16
申请号：US16134046
申请日：2018-09-18
Applicant: Texas Instruments Incorporated
Inventor： Sooping Saw , Rakesh Raja , Wen Pin Lin , Sudhir Nagaraj
Abstract: In one embodiment, a method includes detecting, by a stall detection sensor in a driver coupled to a stepper motor, a first set of time-off periods in a rising commutation phase of motor current during current regulation. The stall detection sensor further detects a second set of time-off periods in a falling commutation phase of motor current during current regulation. Next, the stall detection sensor compares the first set of time-off periods with the second set of time-off periods and determines whether the stepper motor is stalled based on the comparison of the first set of time-off periods with the second set of time-off periods.
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公开(公告)号：US10382032B2
公开(公告)日：2019-08-13
申请号：US15714643
申请日：2017-09-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajarshi Mukhopadhyay , Sooping Saw , Anuj Jain
Abstract: Modulating a gate drive current supplied to an output drive switch coupled to an electric motor by performing at least the following: obtain a gate drive current modulation profile, supply, based on the gate drive current modulation profile, a first gate drive current level as the gate drive current when the output drive switch is operating within a first region, drop the first gate drive current level to a second gate drive current level when the output drive switch transitions from the first region to operating within a Miller region, increase the second gate drive current level to a third gate drive current level within the Miller region, and set the gate drive current to a fourth gate drive current level when the output drive switch transitions from the Miller region to operating within a third region.
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8.发明申请公开(公告)号：US20190109551A1
公开(公告)日：2019-04-11
申请号：US16134046
申请日：2018-09-18
Applicant: Texas Instruments Incorporated
Inventor： Sooping Saw , Rakesh Raja , Wen Pin Lin , Sudhir Nagaraj
Abstract: In one embodiment, a method includes detecting, by a stall detection sensor in a driver coupled to a stepper motor, a first set of time-off periods in a rising commutation phase of motor current during current regulation. The stall detection sensor further detects a second set of time-off periods in a falling commutation phase of motor current during current regulation. Next, the stall detection sensor compares the first set of time-off periods with the second set of time-off periods and determines whether the stepper motor is stalled based on the comparison of the first set of time-off periods with the second set of time-off periods.
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公开(公告)号：US12218574B2
公开(公告)日：2025-02-04
申请号：US17877067
申请日：2022-07-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Raul Blecic , Giacomo Calabrese , Sooping Saw , Premsagar Kittur
Abstract: A modulation device may include a variable burst regulator and a current-driven clock generator. The modulation device may include a first output terminal configured to provide a modulated voltage for an operating frequency over a modulation period. The current-driven clock generator may include a second input terminal configured to receive a buffered version of the modulated voltage. The current-driven clock generator may include a second output terminal configured to provide a modulated current during the modulation period. The operating frequency may be proportional to the modulated current. The operating frequency may control the operating frequency over the modulation period.
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公开(公告)号：US20210011451A1
公开(公告)日：2021-01-14
申请号：US17030683
申请日：2020-09-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rakesh Raja , Sudhir Nagaraj , Sooping Saw
Abstract: A method for electrically producing a stalled state in a stepper motor having a first coil and a second coil is provided. The method includes driving a first sinusoidal current through the first coil, and driving a second sinusoidal current through the second coil, wherein the first and second sinusoidal currents are in phase.
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