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公开(公告)号：US20180085784A1
公开(公告)日：2018-03-29
申请号：US15492315
申请日：2017-04-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
CPC classification number: B08B7/028 , B06B1/023 , B06B1/0284 , B06B1/06 , B60S1/02 , B60S1/56 , F26B5/02 , G02B27/0006
Abstract: Methods and apparatus for ultrasonic lens cleaner using configurable filter banks are disclosed. In certain described examples, the methods and apparatus can expel fluid from a droplet on an optical surface using an ultrasonic transducer mechanically coupled to the optical surface and having first and second resonant frequency bands.
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公开(公告)号：US09912275B2
公开(公告)日：2018-03-06
申请号：US15250337
申请日：2016-08-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
CPC classification number: H02P21/18 , H02P21/0025 , H02P21/06 , H02P21/24 , H02P25/03 , H02P25/08 , H02P27/08
Abstract: A method of normalizing phase measurements for a motor using a normalizing phase measurements (NPM) algorithm that a processor implements to cause a motor controller coupled to stator terminals of the phases to execute forcing a set of input current or voltage vectors (set of input vectors) including repeating the forcing after rotating the rotor through a full mechanical cycle to generate resulting current or voltage samples (resulting samples) of non-normalized phase A and phase B waveforms. The magnitude of the input vectors are sufficiently small to not move the rotor. A maximum value (x_max) and a minimum value (x_min) are determined for each of the non-normalized phase A and phase B waveforms. An offset value and normalization scale factor (NSF) are determined from the max and min values. The offsets and NSFs are applied to the non-normalized phase waveforms to generate normalized phase A and phase B waveforms.
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公开(公告)号：US20180006588A1
公开(公告)日：2018-01-04
申请号：US15702130
申请日：2017-09-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Eric James Thomas
Abstract: Low speed and high speed estimates of rotor angle and speed relative to the stator are received from a low speed estimator and a high speed estimator, respectively. LS_θ_EST and a subset of torque-controlling I_Q trajectory curve (“IQTC”) parameter values appropriate to low speed rotor operation are selected for rotor speeds below a low speed threshold value ω_LOW_THRS. HS_θ_EST and a subset of IQTC curve parameter values appropriate to high speed rotor operation are selected for rotor speeds above a high speed threshold value ω_HIGH_THRS. LS_θ_EST and the low speed subset of IQTC parameter values remain selected for rotor speeds less than ω_HIGH_THRS after accelerating to a rotor speed greater than ω_LOW_THRS. HS_θ_EST and the subset of high speed IQTC parameter values remain selected for rotor speeds greater than ω_LOW_THRS after decelerating to a rotor speed less than ω_HIGH_THRS.
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公开(公告)号：US09762155B1
公开(公告)日：2017-09-12
申请号：US15163450
申请日：2016-05-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David Patrick Magee , Eric James Thomas
CPC classification number: H02P6/08 , H02P6/18 , H02P6/181 , H02P6/182 , H02P21/18 , H02P21/24 , H02P27/08
Abstract: Low speed and high speed estimates of rotor angle and speed (LS_θ_EST/LS_ω_EST and HS_θ_EST/HS_ω_EST) relative to the stator are received from a low speed estimator and a high speed estimator, respectively. LS_θ_EST and a subset of torque-controlling I_Q trajectory curve (“IQTC”) parameter values appropriate to low speed rotor operation are selected for rotor speeds below a low speed threshold value ω_LOW_THRS. HS_θ_EST and a subset of IQTC curve parameter values appropriate to high speed rotor operation are selected for rotor speeds above a high speed threshold value ω_HIGH_THRS. LS_θ_EST and the low speed subset of IQTC parameter values remain selected for rotor speeds less than ω_HIGH_THRS after accelerating to a rotor speed greater than ω_LOW_THRS. HS_θ_EST and the subset of high speed IQTC parameter values remain selected for rotor speeds greater than ω_LOW_THRS after decelerating to a rotor speed less than ω_HIGH_THRS. Hysteresis in the selection of θ_EST and IQTC parameter values results in smooth acceleration/deceleration control.
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公开(公告)号：US20170143274A1
公开(公告)日：2017-05-25
申请号：US15203859
申请日：2016-07-07
Applicant: Texas Instruments Incorporated
Inventor： Tarkesh Pande , David Patrick Magee
Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate, in which a processor filters digital photoplethysmogram (PPG) sample values representing transmission or reflection of a light signal in the patient during a time window, performs motion compensation processing on the filtered values, computes a gain value for individual segments of the time window using the motion compensated values, applies the individual gain values to the motion compensated values of blocks associated with the corresponding segments, and determines a heart rate estimate value representing the patient heart rate according to the frequency content of the adjusted values.
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Patent Agency Ranking
公开(公告)号：US20170143218A1
公开(公告)日：2017-05-25
申请号：US15237941
申请日：2016-08-16
Applicant: Texas Instruments Incorporated
Inventor： Tarkesh Pande , David Patrick Magee , Rajan Narasimha
CPC classification number: A61B5/02427 , A61B5/7225 , A61B5/7275 , A61B5/7278
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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公开(公告)号：US20170104430A1
公开(公告)日：2017-04-13
申请号：US14880008
申请日：2015-10-09
Applicant: Texas Instruments Incorporated
Inventor： David Patrick Magee , Jorge Zambada
CPC classification number: H02P21/0003 , H02P21/14 , H02P21/18 , H02P21/24
Abstract: A motor controller architecture and method of operating the same. The motor controller asynchronously generates multiphase control signals for a multi-phase electric motor, relative to the estimation of various state parameters used in generating those control signals. Latency between the state estimation task and the control signal generation task is addressed by storing a timestamp with each input data sample from the sensors, and maintaining that timestamp with the output data from state estimation. Knowledge of the timestamp value allows the control task to update the state estimates to compensate for the time difference between the input data sample and the current sampling period.
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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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99.发明授权公开(公告)号：US09548686B2
公开(公告)日：2017-01-17
申请号：US14337576
申请日：2014-07-22
Applicant: Texas Instruments Incorporated
Inventor： David Patrick Magee
Abstract: A motor controller architecture and method of operating the same. The motor controller includes a function for estimating the low speed operation of the motor, for example by evaluating the response to a periodic excitation signal injected into the control loop of the controller architecture. Control logic for controlling the motor at transitional speeds between low speed control and high speed (back emf) control is provided in some embodiments.
Abstract translation: 一种电动机控制器结构及其运行方法。 电动机控制器包括用于估计电动机的低速运行的功能，例如通过评估对控制器架构的控制回路中注入的周期性激励信号的响应。 在一些实施例中提供了用于在低速控制和高速（反电动势）控制之间以过渡速度控制电动机的控制逻辑。
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公开(公告)号：US20160294314A1
公开(公告)日：2016-10-06
申请号：US14675196
申请日：2015-03-31
Applicant: Texas Instruments Incorporated
Inventor： Jorge Zambada , David Patrick Magee
Abstract: A motor controller architecture and method of operating the same. The motor controller includes a function for selecting a fractional delay compensation value to be applied in the estimate of rotor position for which pulse-width-modulated drive signals are to be applied to a multi-phase electric motor. The motor is operated over iterated trial values of fractional delay time, while monitoring a magnitude of a feedback signal in the control loop. The selected fractional delay time is that having a lowest magnitude of the monitored feedback signal.
Abstract translation: 一种电动机控制器结构及其运行方法。 电动机控制器包括用于选择将要对脉冲宽度调制的驱动信号施加到多相电动机的转子位置的估计中应用的分数延迟补偿值的功能。 电机在分数延迟时间的迭代试验值下运行，同时监视控制回路中的反馈信号的幅度。 所选择的分数延迟时间是具有所监视的反馈信号的最小量值。
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