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公开(公告)号:US12212270B2
公开(公告)日:2025-01-28
申请号:US17369000
申请日:2021-07-07
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor: Sameer Pradeep Kulkarni , Prasad Kulkarni , Ganapathi Hegde
Abstract: A motor controller that is operable to control a motor includes drive current generation circuitry having an output coupled to the motor. The motor controller further includes a velocity control path. The velocity control path includes angular velocity estimation circuitry having an input adapted to be coupled to the motor, a velocity comparator having first input coupled to a target velocity input and a second input coupled to an output of the angular velocity estimation circuitry, and an adaptive velocity controller having a first input coupled to an output of the velocity comparator and having an output coupled to a first input of the drive current generation circuitry. The motor controller further includes controller parameter determination circuitry having a first input coupled to the output of the angular velocity estimation circuitry and having an output coupled to a second input of the adaptive velocity controller.
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公开(公告)号:US20230044791A1
公开(公告)日:2023-02-09
申请号:US17397156
申请日:2021-08-09
Applicant: Texas Instruments Incorporated
Inventor: Ashish Ojha , Krishnamurthy Shankar , Siddhartha Gopal Krishna , Priyank Anand , Ganapathi Hegde
Abstract: An apparatus for regulating a slew time of an output voltage of a motor driver system includes a gate current control circuit which has a first input coupled to receive a target slew time and a second input coupled to receive a slew time. The gate current control circuit provides an incremented gate current if the slew time is greater than the target slew time and provides a decremented gate current if the slew time is less than the target slew time. The apparatus includes a gate driver which has a first input coupled to receive a PWM signal and a second input coupled to receive the gate current. The gate driver provides a gate drive signal.
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公开(公告)号:US09740236B2
公开(公告)日:2017-08-22
申请号:US14982200
申请日:2015-12-29
Applicant: Texas Instruments Incorporated
Inventor: Ganapathi Hegde
Abstract: Systems and methods for a Dual Window Watchdog Timer (DWWDT) are described. In some embodiments, a method may include running a first counter in a first clock domain and a second counter in a second clock domain; generating an interrupt to a controller during a window open period, wherein the window open period begins in response to the first counter having reached a predetermined threshold; and at least one of: restarting the first counter if the controller restarts the second counter in response to the interrupt before the window open period ends; or issuing a system reset if the controller does not restart the second counter in response to the interrupt before the window open period ends.
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公开(公告)号:US20160266605A1
公开(公告)日:2016-09-15
申请号:US14982200
申请日:2015-12-29
Applicant: Texas Instruments Incorporated
Inventor: Ganapathi Hegde
IPC: G06F1/12
Abstract: Systems and methods for a Dual Window Watchdog Timer (DWWDT) are described. In some embodiments, a method may include running a first counter in a first clock domain and a second counter in a second clock domain; generating an interrupt to a controller during a window open period, wherein the window open period begins in response to the first counter having reached a predetermined threshold; and at least one of: restarting the first counter if the controller restarts the second counter in response to the interrupt before the window open period ends; or issuing a system reset if the controller does not restart the second counter in response to the interrupt before the window open period ends.
Abstract translation: 描述了双窗口看门狗定时器(DWWDT)的系统和方法。 在一些实施例中,一种方法可以包括在第一时钟域中运行第一计数器,在第二时钟域中运行第二计数器; 在窗口打开期间向控制器产生中断,其中所述窗口打开周期响应于所述第一计数器已经达到预定阈值而开始; 以及至少一个:如果在窗口打开期间结束之前控制器响应于中断重新启动第二计数器,则重新启动第一计数器; 或者如果控制器在窗口打开期间结束之前不响应于中断而重新启动第二计数器,则发出系统复位。
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公开(公告)号:US20230238904A1
公开(公告)日:2023-07-27
申请号:US18130333
申请日:2023-04-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor: Prasad Kulkarni , Venkata Pavan Mahankali , Ganapathi Hegde
CPC classification number: H02P21/10 , H02P21/22 , H02P21/18 , H02P2207/055
Abstract: Described examples include a method that includes setting a reference iq signal in a field-oriented control of a motor such that the field-oriented control modulates power from a power supply using a modulator to apply a torque on the motor that is opposite to a kinetic energy applied to the motor. The method also includes setting a reference id signal in the field-oriented control such that the motor current provided to the power supply is reduced.
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公开(公告)号:US11594987B1
公开(公告)日:2023-02-28
申请号:US17514171
申请日:2021-10-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor: Venkata Pavan Mahankali , Ganapathi Hegde , Krushal Shah
Abstract: Example systems and processes compare sampled values of a floating phase voltage and/or outgoing phase current of an electric motor with a corresponding reference to identify a degauss time period. Post degauss time period identification, sampled values are compared with a threshold to identify a settling time period following the degauss time period. The threshold used to identify the settling time period depends on a slope of a floating phase voltage after the degauss time period, a modulation scheme being used, and a pulse width modulation ON/OFF state of the electric motor. When the threshold comparison test is not met, it is determined whether the slope of the floating phase voltage has inverted. Based on such processing, a back-electromotive force (BEMF) zero-crossing (ZC) is detected or estimated with respect to a floating phase voltage of the electric motor.
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公开(公告)号:US20230039198A1
公开(公告)日:2023-02-09
申请号:US17397133
申请日:2021-08-09
Applicant: Texas Instruments Incorporated
Inventor: Ashish Ojha , Krishnamurthy Shankar , Siddhartha Gopal Krishna , Priyank Anand , Ganapathi Hegde
IPC: H03K17/687 , H02P23/00 , H03K5/24
Abstract: A control circuit regulates the propagation delay of a field effect transistor (FET) before the FET transitions to the Miller region by applying a pre-charge current for a fixed duration to the gates of the FET. After the fixed duration, the current is reduced to a lower drive current level which is based on a desired output voltage slew rate. After the FET transitions to the Miller region, the output voltage slews down in accordance with the output voltage slew rate. By regulating the slew-rate of the output voltage in the Miller region and regulating the propagation delay of the FET prior to the Miller region, the control circuit reduces electromagnetic interference (EMI) caused by the switching of the FET, thereby improving electromagnetic compatibility (EMC) of switch mode driver systems without increasing the propagation delay of the FET.
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公开(公告)号:US20230023055A1
公开(公告)日:2023-01-26
申请号:US17384582
申请日:2021-07-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor: Prasad Kulkarni , Venkata Pavan Mahankali , Ganapathi Hegde
Abstract: Described examples include a method that includes setting a reference iq signal in a field-oriented control of a motor such that the field-oriented control modulates power from a power supply using a modulator to apply a torque on the motor that is opposite to a kinetic energy applied to the motor. The method also includes setting a reference id signal in the field-oriented control such that the motor current provided to the power supply is reduced.
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公开(公告)号:US11894795B2
公开(公告)日:2024-02-06
申请号:US17731389
申请日:2022-04-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor: Venkata Pavan Mahankali , Prasad Kulkarni , Ganapathi Hegde , Sameer Kulkarni
Abstract: Example systems and processes use three-phase vector mutual inductance analysis to detect zero-crossing (ZC) locations of back-electromotive force (BEMF) of an electric motor and to detect its commutation points during start-up or low-speed operation. For each sector of rotation of the rotor, two pairs of three-phase vectors are applied, along with current for the corresponding driving phase. The first pair is alternately applied to move the rotor, and the mutual inductances resulting from such application are compared to detect the zero-crossing (ZC) location in the BEMF of the electric motor in that sector. The second pair is then alternately applied within the same sector to continue to move the rotor, and the mutual inductances from such application are compared to detect the commutation point of the electric motor in that sector. The process may be repeated for each successive sector, changing the driving current at each new sector.
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公开(公告)号:US11764710B2
公开(公告)日:2023-09-19
申请号:US17364540
申请日:2021-06-30
Applicant: Texas Instruments Incorporated
Inventor: Prasad Kulkarni , Venkata Pavan Mahankali , Ganapathi Hegde
CPC classification number: H02P6/182 , H02P21/0003 , H02P21/10 , H02P21/18 , H02P21/22 , H02P27/06 , H02P2203/03
Abstract: A motor controller integrated circuit (IC) includes a storage device containing software, and a processor core. The processor core has an output adapted to be coupled to a motor. The processor core is configured to execute the software to operate the motor in an open-loop control, calculate first and second orthogonal components of a back electromotive force (BEMF), calculate a total BEMF value, and determine that the first orthogonal component is within a threshold of the total BEMF value. The processor core is further configured to, responsive to the first orthogonal component being within the threshold of the total BEMF value, operate the motor in a closed-loop control.
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