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1. 发明申请

US20230044791A1 Systems and Methods for Regulating Slew Time of Output Voltage of DC Motor Drivers 有权
公开(公告)号：US20230044791A1
公开(公告)日：2023-02-09
申请号：US17397156
申请日：2021-08-09
申请人： Texas Instruments Incorporated
发明人： Ashish Ojha , Krishnamurthy Shankar , Siddhartha Gopal Krishna , Priyank Anand , Ganapathi Hegde
IPC分类号： H02P7/29 , H03K17/16 , H02H9/00
摘要： 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.

2. 发明授权

US09740236B2 Dual window watchdog timer 有权
公开(公告)号：US09740236B2
公开(公告)日：2017-08-22
申请号：US14982200
申请日：2015-12-29
申请人： Texas Instruments Incorporated
发明人： Ganapathi Hegde
IPC分类号： G06F1/12 , G06F1/06
CPC分类号： G06F1/12 , G06F1/06
摘要： 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.

3. 发明申请

US20160266605A1 DUAL WINDOW WATCHDOG TIMER 有权
标题翻译：双窗口看门狗定时器
公开(公告)号：US20160266605A1
公开(公告)日：2016-09-15
申请号：US14982200
申请日：2015-12-29
申请人： Texas Instruments Incorporated
发明人： Ganapathi Hegde
IPC分类号： G06F1/12
CPC分类号： G06F1/12 , G06F1/06
摘要： 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.
摘要翻译：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。

4. 发明公开

US20230238904A1 MOTOR CONTROL WITH REDUCED BACK CURRENT DURING BRAKING 审中-公开
公开(公告)号：US20230238904A1
公开(公告)日：2023-07-27
申请号：US18130333
申请日：2023-04-03
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Prasad Kulkarni , Venkata Pavan Mahankali , Ganapathi Hegde
IPC分类号： H02P21/10 , H02P21/22 , H02P21/18
CPC分类号： H02P21/10 , H02P21/22 , H02P21/18 , H02P2207/055
摘要： 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.

5. 发明授权

US11594987B1 Degauss time detection in electric motors 有权
公开(公告)号：US11594987B1
公开(公告)日：2023-02-28
申请号：US17514171
申请日：2021-10-29
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Venkata Pavan Mahankali , Ganapathi Hegde , Krushal Shah
IPC分类号： H02P6/182 , H02P6/21
摘要： 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.

6. 发明申请

US20230039198A1 Systems and Methods for Regulation of Propagation Delay in DC Motor Drivers 有权
公开(公告)号：US20230039198A1
公开(公告)日：2023-02-09
申请号：US17397133
申请日：2021-08-09
申请人： Texas Instruments Incorporated
发明人： Ashish Ojha , Krishnamurthy Shankar , Siddhartha Gopal Krishna , Priyank Anand , Ganapathi Hegde
IPC分类号： H03K17/687 , H02P23/00 , H03K5/24
摘要： 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.

7. 发明申请

US20230023055A1 MOTOR CONTROL WITH REDUCED BACK CURRENT DURING BRAKING 有权
公开(公告)号：US20230023055A1
公开(公告)日：2023-01-26
申请号：US17384582
申请日：2021-07-23
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Prasad Kulkarni , Venkata Pavan Mahankali , Ganapathi Hegde
IPC分类号： H02P21/10 , H02P21/18 , H02P21/22
摘要： 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.

8. 发明授权

US11923799B2 Systems and methods for regulating slew time of output voltage of DC motor drivers 有权
公开(公告)号：US11923799B2
公开(公告)日：2024-03-05
申请号：US17397156
申请日：2021-08-09
申请人： Texas Instruments Incorporated
发明人： Ashish Ojha , Krishnamurthy Shankar , Siddhartha Gopal Krishna , Priyank Anand , Ganapathi Hegde
IPC分类号： H02P7/29 , H02H9/00 , H03K17/16
CPC分类号： H02P7/29 , H02H9/001 , H03K17/165
摘要： 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.

9. 发明授权

US11728751B2 Resynchronization of brushless DC motors 有权
公开(公告)号：US11728751B2
公开(公告)日：2023-08-15
申请号：US17463349
申请日：2021-08-31
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Ganapathi Hegde , Prasad Kulkarni , Venkata Pavan Mahankali , Sameer Pradeep Kulkarni
IPC分类号： H02P25/03 , H02P6/182 , H02P25/026
CPC分类号： H02P6/182 , H02P25/026 , H02P25/03
摘要： A controller is adapted to be coupled to a brushless direct current (DC) motor and includes an analog-to-digital converter (ADC), a computing device, and a driver. The ADC is configured to receive an analog back electromotive force (BEMF) waveform from the brushless DC motor and sample the analog BEMF waveform to produce a digital BEMF waveform. The computing device is coupled to the ADC and is configured to receive the digital BEMF waveform and determine a position and a speed of the rotor based on the digital BEMF waveform. The driver is coupled to the ADC and the computing device and is configured to receive the position and the speed of the rotor and provide a drive signal based on the position and the speed of the rotor of the brushless DC motor.

10. 发明授权

US11476783B1 Operational transition control of a motor 有权
公开(公告)号：US11476783B1
公开(公告)日：2022-10-18
申请号：US17359158
申请日：2021-06-25
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Venkata Pavan Mahankali , Prasad Kulkarni , Ganapathi Hegde
IPC分类号： H02P6/21
摘要： Example systems and processes control transition of an electric motor from open-loop operation to closed-loop operation by detecting zero-crossing (ZC) locations of the back-electromotive force (BEMF). The rotor angle of the electric motor is changed, e.g., by changing acceleration of the electric motor to correct a phase difference based on the detected ZC locations and an open-loop profile of the electric motor. Detected ZC locations may be used to identify ZC-detected-based commutation points, and each detected ZC location may be used to update a next commutation point. During the control process the open-loop profile is updated. Transition may occur when a set number of ZC-detection-based commutation points are sufficiently aligned with corresponding updated commutation points, or such alignment is maintained for at least one electrical cycle.

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