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公开(公告)号：US11309814B2
公开(公告)日：2022-04-19
申请号：US17101910
申请日：2020-11-23
Applicant: Texas Instruments Incorporated
Inventor： Michael Edwin Butenhoff , Rakesh Raja , Nicholas James Oborny
Abstract: Enhanced motor power control circuitry is presented herein. In one implementation, a circuit includes power transistor elements in a half-bridge arrangement configured to selectively switch current for a phase of a motor according to control signals applied to corresponding gate terminals. The circuit also includes control circuitry configured to produce the control signals to achieve target states among the power transistor elements. The control signals have ramp rates determined based at least on polarities of the current through the power transistor elements during inactive states.
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公开(公告)号：US11063577B2
公开(公告)日：2021-07-13
申请号：US16896902
申请日：2020-06-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Paul Vulpoiu , Rakesh Raja , Sudhir Nagaraj
Abstract: An analog signal-to-pulse width modulation (PWM) converter includes a ramp generator generating a ramp signal and a comparator circuit comparing the ramp signal to a first voltage, a second voltage, and to an analog input signal. A duty cycle calculation circuit generates a first control signal to the ramp generator to generate the ramp signal. Based on signals from the comparator circuit, the duty cycle calculation circuit calculates the ratio of the time it takes for the ramp signal to exceed the analog input signal from when the ramp signal exceeds the first voltage to the time it takes for the ramp signal to exceed the second voltage from when the ramp signal exceeds the first voltage. A PWM signal generator generates a PWM output signal based on the ratio calculated by the duty cycle calculation circuit.
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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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14.发明申请公开(公告)号：US20200266740A1
公开(公告)日：2020-08-20
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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Patent Agency Ranking
公开(公告)号：US10707842B2
公开(公告)日：2020-07-07
申请号：US15791026
申请日：2017-10-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Paul Vulpoiu , Rakesh Raja , Sudhir Nagaraj
Abstract: An analog signal-to-pulse width modulation (PWM) converter includes a ramp generator generating a ramp signal and a comparator circuit comparing the ramp signal to a first voltage, a second voltage, and an analog input signal. A duty cycle calculation circuit generates a first control signal to the ramp generator to generate the ramp signal. Based on signals from the comparator circuit, the duty cycle calculation circuit calculates the ratio of the time it takes for the ramp signal to exceed the analog input signal from when the ramp signal exceeds the first voltage to the time it takes for the ramp signal to exceed the second voltage from when the ramp signal exceeds the first voltage. A PWM signal generator generates a PWM output signal based on the ratio calculated by the duty cycle calculation circuit.
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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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17.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：US09647588B2
公开(公告)日：2017-05-09
申请号：US14984834
申请日：2015-12-30
Applicant: Texas Instruments Incorporated
Inventor： Sudhir Nagaraj , David H. Elwart, II , Rakesh Raja , Anuj Jain
CPC classification number: H02P8/12 , H02P29/032
Abstract: A system and method for a decay lock loop for time varying current regulation in electric motors determines if a predetermined electrical current regulation level for an electric motor has been obtained within a tuning control time window. A coarse control loop increases or decreases a fast current decay, in response to a determination that the predetermined electrical current regulation level has not been obtained within the tuning control time window, until the predetermined electrical current regulation level falls within the tuning control time window. A fine control loop increments or decrements an amount of fast current decay during a total decay time, in response to a determination that the predetermined electrical current regulation level has been obtained within the tuning control time window, until a predetermined timing of the predetermined electrical current regulation level has been obtained.
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公开(公告)号：US20160254767A1
公开(公告)日：2016-09-01
申请号：US14984834
申请日：2015-12-30
Applicant: Texas Instruments Incorporated
Inventor： Sudhir Nagaraj , David H. Elwart, II , Rakesh Raja , Anuj Jain
IPC: H02P8/12
CPC classification number: H02P8/12 , H02P29/032
Abstract: A system and method for a decay lock loop for time varying current regulation in electric motors determines if a predetermined electrical current regulation level for an electric motor has been obtained within a tuning control time window. A coarse control loop increases or decreases a fast current decay, in response to a determination that the predetermined electrical current regulation level has not been obtained within the tuning control time window, until the predetermined electrical current regulation level falls within the tuning control time window. A fine control loop increments or decrements an amount of fast current decay during a total decay time, in response to a determination that the predetermined electrical current regulation level has been obtained within the tuning control time window, until a predetermined timing of the predetermined electrical current regulation level has been obtained.
Abstract translation: 用于电动机中时变电流调节的衰减锁定回路的系统和方法确定在调谐控制时间窗内是否已经获得了电动机的预定电流调节水平。 响应于确定在调谐控制时间窗口内没有获得预定的电流调节电平，直到预定的电流调节级别落在调谐控制时间窗口内，粗略的控制环路增加或减少快速电流衰减。 响应于在调谐控制时间窗口内已经获得预定电流调节电平的确定，直到预定电流的预定定时，精密控制环路在总衰减时间期间增加或减少快速电流衰减量 调节水平已经获得。
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