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公开(公告)号：US20160238660A1
公开(公告)日：2016-08-18
申请号：US14836037
申请日：2015-08-26
Applicant: Texas Instruments Incorporated
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
CPC classification number: G01R31/346 , G01R31/343 , H02M7/53875
Abstract: Described examples include controllers and methods for controlling an inverter to drive a load and for detecting load faults by determining phasor values representing voltages and currents associated with the individual load phases based on sets of input values, determining voltage and current sequence components according to the phasor values, determining a sequence impedance value by recursively solving a set of update equations at least partially according to the voltage and current sequence components, and detecting a load fault when the sequence impedance value exceeds a threshold value.
Abstract translation: 所描述的示例包括用于控制逆变器来驱动负载并通过基于输入值的集合确定表示与各个负载相位相关联的电压的相量值来检测负载故障的控制器和方法，根据相量确定电压和电流序列分量 值，通过至少部分地根据电压和电流序列分量递归地求解一组更新方程，以及当序列阻抗值超过阈值时检测负载故障来确定序列阻抗值。
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公开(公告)号：US12168401B2
公开(公告)日：2024-12-17
申请号：US18049319
申请日：2022-10-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Aravind Samba Murthy , David Patrick Magee
Abstract: A regenerative braking controller for an AC motor. To determine an electromagnetic torque for slowing or stopping the motor, the regenerative braking controller accesses a lookup table to retrieve a braking torque value corresponding to a current estimate of rotor velocity. The retrieved braking torque may correspond to a maximum or minimum torque level at which regenerative braking will occur at the current rotor velocity, or to a torque level at which charging current during regenerative braking will be maximized. If an external mechanical brake is present, the regenerative braking controller can forward an external braking torque signal to a controller so that the mechanical brake can apply the remainder of the braking force beyond that indicated by the regenerative braking torque. A method for establishing the braking torques to be stored in the lookup table is also disclosed.
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公开(公告)号：US12000892B2
公开(公告)日：2024-06-04
申请号：US17589779
申请日：2022-01-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Charles Kasimer Sestok, IV , David Patrick Magee
IPC: G01R31/00 , G01R31/3167 , G01R31/319 , H03M1/06 , H03M1/10
CPC classification number: G01R31/31922 , G01R31/3167 , G01R31/31924 , H03M1/0629 , H03M1/1071
Abstract: A circuit configured to: generate a reference clock signal; generate an excitation signal at a target frequency having a period that is a first integer number of cycles of the reference clock signal; update a driver circuit at an update frequency having a period that is a second integer number of cycles of the reference clock signal; digitize sense signals resulting from the excitation signal at a frequency having a period that is a third integer number of cycles of the reference clock signal; identify a fourth integer number of sense signal samples; optionally utilize an excitation control signal having a period that is a fifth integer number of cycles of the reference clock signal; and minimize harmonics at the target frequency of the excitation signal based on the first integer number, the second integer number, the third integer number, the fourth integer number, and possibly the fifth integer number.
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公开(公告)号：US11874644B2
公开(公告)日：2024-01-16
申请号：US17146083
申请日：2021-01-11
Applicant: Texas Instruments Incorporated
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
IPC: G05B19/416 , G05B19/29 , G05B19/414 , G05B19/39 , G05B19/25 , H02K29/10 , G02B26/00 , H02P27/08 , H02P6/16 , H02P6/15 , H02P6/182 , G05B19/23
CPC classification number: G05B19/416 , G02B26/008 , G05B19/237 , G05B19/258 , G05B19/291 , G05B19/39 , G05B19/414 , H02K29/10 , H02P6/15 , H02P6/16 , H02P6/182 , H02P27/08 , G05B2219/41293 , G05B2219/42237
Abstract: In described examples of methods and control systems to control a position and/or velocity of a machine, control circuitry is coupled to receive and dither a control signal, and to compute a control output value according to the dithered control signal and a control function. An inverter is coupled to the control circuitry, to control the position and/or velocity according to the control output value.
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公开(公告)号：US20240012062A1
公开(公告)日：2024-01-11
申请号：US18472542
申请日：2023-09-22
Applicant: Texas Instruments Incorporated
Inventor： Charles Kasimer SESTOK , David Patrick Magee
IPC: G01R31/389 , G01R31/3842 , G01R31/396
CPC classification number: G01R31/389 , G01R31/3842 , G01R31/396
Abstract: A method includes transforming a signal from a first domain representation to a second domain representation, the signal representing a parameter of a device and having multiple cycles. The method further comprises determining the second domain representation of a droop component of the parameter based on the signal, in which the droop component represents a rate of change of the parameter across one or more cycles of the multiple cycles. The method further comprises generating an adjusted parameter of the device based on combining the respective second domain representations of the parameter and the droop component.
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Patent Agency Ranking
公开(公告)号：US11604228B2
公开(公告)日：2023-03-14
申请号：US17520319
申请日：2021-11-05
Applicant: TEXAS INSTRUMENTS INCORPORATED
IPC: G01R31/389 , G01R31/367 , G01R31/396 , G01R31/3842
Abstract: From a current measurement circuit, digital samples are received of a current signal that flows through a battery cell within a measurement period. From a voltage measurement circuit, digital samples are received of a voltage signal across the battery cell within the measurement period. First voltage spectral components are generated based on performing a first transform operation on the digital samples of the voltage signal. A current spectrum is generated based on performing a second transform operation on the digital samples of the current signal. Second voltage spectral components are generated based on a first condition of the battery cell before the measurement period and a second condition of the battery cell after the measurement period. A voltage spectrum is including the first voltage spectrum and the second voltage spectrum is generated. An impedance spectrum of the battery cell is generated based on the voltage spectrum and the current spectrum.
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公开(公告)号：US11479124B2
公开(公告)日：2022-10-25
申请号：US17352436
申请日：2021-06-21
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Aravind Samba Murthy , David Patrick Magee
Abstract: A regenerative braking controller for an AC motor. To determine an electromagnetic torque for slowing or stopping the motor, the regenerative braking controller accesses a lookup table to retrieve a braking torque value corresponding to a current estimate of rotor velocity. The retrieved braking torque may correspond to a maximum or minimum torque level at which regenerative braking will occur at the current rotor velocity, or to a torque level at which charging current during regenerative braking will be maximized. If an external mechanical brake is present, the regenerative braking controller can forward an external braking torque signal to a controller so that the mechanical brake can apply the remainder of the braking force beyond that indicated by the regenerative braking torque. A method for establishing the braking torques to be stored in the lookup table is also disclosed.
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公开(公告)号：US20220163592A1
公开(公告)日：2022-05-26
申请号：US17520319
申请日：2021-11-05
Applicant: TEXAS INSTRUMENTS INCORPORATED
IPC: G01R31/389 , G01R31/3842 , G01R31/396 , G01R31/367
Abstract: From a current measurement circuit, digital samples are received of a current signal that flows through a battery cell within a measurement period. From a voltage measurement circuit, digital samples are received of a voltage signal across the battery cell within the measurement period. First voltage spectral components are generated based on performing a first transform operation on the digital samples of the voltage signal. A current spectrum is generated based on performing a second transform operation on the digital samples of the current signal. Second voltage spectral components are generated based on a first condition of the battery cell before the measurement period and a second condition of the battery cell after the measurement period. A voltage spectrum is including the first voltage spectrum and the second voltage spectrum is generated. An impedance spectrum of the battery cell is generated based on the voltage spectrum and the current spectrum.
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公开(公告)号：US11316507B2
公开(公告)日：2022-04-26
申请号：US17364489
申请日：2021-06-30
Applicant: Texas Instruments Incorporated
Inventor： David Hernandez , David Patrick Magee , Mohit Chawla , James Kelly Griffin
IPC: H03K7/08
Abstract: Techniques are provided herein for generating PWM signals. Furthermore, a direct-drive method is disclosed in which a PWM signal is generated as a differential signal made up of OUTP and OUTN signals, where OUTP is a copy of OUTN but shifted in time by half a period. The PWM signal is generated by passing each of an input period and an input duty cycle through corresponding sigma-delta circuits to generate a refined period and a refined duty cycle, respectively. In some example cases, a threshold mapper uses a lookup table (LUT) or similar mechanism to select timing thresholds for rise times and fall times for each of the OUTP and OUTN signals, where the timing thresholds are selected based on the refined period and the refined duty cycle. In some example cases, a pulse generator generates the OUTP and OUTN signals based on the timing thresholds.
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公开(公告)号：US20210378535A1
公开(公告)日：2021-12-09
申请号：US17412580
申请日：2021-08-26
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tarkesh Pande , David Patrick Magee , Rajan Narasimha
Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate or rate of another pulsed signal, in which rate hypotheses or states, are identified for a current time window according to digital sample values of the pulsed signal for a current sample time window, and a rate change value is computed for potential rate transitions between states of the current and previous time windows. Transition pair branch metric values are computed as a function of the rate change value and a frequency domain amplitude of the corresponding rate hypothesis for the current time window, and the pulsed signal rate estimate is determined according to a maximum path metric computed according to the branch metric value and a corresponding path metric value for the previous time window.
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