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公开(公告)号：US11705834B2
公开(公告)日：2023-07-18
申请号：US16728664
申请日：2019-12-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
CPC classification number: H02P6/157 , H02P6/20 , H02P2209/03 , H02P2209/07
Abstract: Systems and methods for sensorless trapezoidal control of brushless DC motors provide effective high-torque startup and low speed operation without the use of Hall effect sensors or encoders during motor operation. The systems and methods also provide the ability to boost signal-to-noise ratio for motor startup and low speed operation via an augmenting supply voltage. Sampling architectures and current-dependent inductance modeling architectures for the control systems are also described.
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公开(公告)号：US10797629B2
公开(公告)日：2020-10-06
申请号：US16198964
申请日：2018-11-23
Applicant: Texas Instruments Incorporated
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
Abstract: A permanent magnet motor controller injects a periodic signal into a field oriented controller of the brushless motor. Phase currents in stator windings of the brushless motor are measured. A d-axis current and a q-axis current are determined with a transform of the phase currents. The d-axis current and the q-axis current are demodulated to extract an angle dependent current signature that includes a sine component of a rotor angle estimate and a cosine component of the rotor angle estimate. The rotor angle estimate is determined by processing the sine component and cosine component.
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公开(公告)号：US20210132585A1
公开(公告)日：2021-05-06
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 , H02K29/10 , G05B19/414 , G02B26/00 , G05B19/39 , H02P27/08 , H02P6/16 , H02P6/15 , G05B19/25 , H02P6/182 , G05B19/23
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：US09581649B2
公开(公告)日：2017-02-28
申请号：US14836037
申请日：2015-08-26
Applicant: Texas Instruments Incorporated
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
IPC: H02P27/00 , G01R31/34 , H02M7/5387
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：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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Patent Agency Ranking
公开(公告)号：US10890895B2
公开(公告)日：2021-01-12
申请号：US15841575
申请日：2017-12-14
Applicant: Texas Instruments Incorporated
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
IPC: G05B19/416 , G05B19/29 , H02K29/10 , G05B19/414 , G02B26/00 , G05B19/39 , H02P27/08 , H02P6/16 , H02P6/15 , G05B19/25 , H02P6/182 , G05B19/23
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：US10591548B2
公开(公告)日：2020-03-17
申请号：US16154451
申请日：2018-10-08
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
Abstract: A controller for driving a motor includes a multiphase driver, an analog-to-digital converter (ADC), impedance estimation circuitry, and fault detection circuitry. The multiphase driver is configured to generate drive signals for energizing each motor phase winding. The ADC is configured to digitize voltage and current from each motor phase winding. The impedance estimation circuitry is configured to determine a phasor value for the digitized voltages and for the digitized currents at a predetermined harmonic frequency, and to determine a sequence impedance value based on the phasor values. The fault detection circuitry is configured to identify a fault in the windings of the motor based on the sequence impedance value.
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公开(公告)号：US10094878B1
公开(公告)日：2018-10-09
申请号：US15631907
申请日：2017-06-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
Abstract: A controller for driving a motor includes a multiphase driver, an analog-to-digital converter (ADC), impedance estimation circuitry, and fault detection circuitry. The multiphase driver is configured to generate drive signals for energizing each motor phase winding. The ADC is configured to digitize voltage and current from each motor phase winding. The impedance estimation circuitry is configured to determine a phasor value for the digitized voltages and for the digitized currents at a predetermined harmonic frequency, and to determine a sequence impedance value based on the phasor values. The fault detection circuitry is configured to identify a fault in the windings of the motor based on the sequence impedance value.
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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：US20200169204A1
公开(公告)日：2020-05-28
申请号：US16198964
申请日：2018-11-23
Applicant: Texas Instruments Incorporated
Inventor： Rajan Lakshmi Narasimha , David Patrick Magee
Abstract: A permanent magnet motor controller injects a periodic signal into a field oriented controller of the brushless motor. Phase currents in stator windings of the brushless motor are measured. A d-axis current and a q-axis current are determined with a transform of the phase currents. The d-axis current and the q-axis current are demodulated to extract an angle dependent current signature that includes a sine component of a rotor angle estimate and a cosine component of the rotor angle estimate. The rotor angle estimate is determined by processing the sine component and cosine component.
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