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公开(公告)号：US20180221921A1
公开(公告)日：2018-08-09
申请号：US15605463
申请日：2017-05-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： DAVID PATRICK MAGEE , STEPHEN JOHN FEDIGAN
Abstract: A control system for cleaning and monitoring a sensor assembly disposed externally on a vehicle is provided and includes a contaminant detection/identification sub-system that measures a resonant frequency of the sensor assembly to detect contaminants disposed on an exposed surface of the sensor assembly. A cleaning sub-system is provided and includes cleaning modes that expel the contaminants from the exposed surface of the sensor assembly. A temperature monitoring device monitors a temperature of an actuator disposed in the sensor assembly and a fault detection device detects faults in the sensor assembly.
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公开(公告)号：US20210203257A1
公开(公告)日：2021-07-01
申请号：US16728664
申请日：2019-12-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： RAJAN LAKSHMI NARASIMHA , DAVID PATRICK MAGEE
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：US20200174251A1
公开(公告)日：2020-06-04
申请号：US16781506
申请日：2020-02-04
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： STEPHEN JOHN FEDIGAN , DAVID PATRICK MAGEE
Abstract: An apparatus for mitigating contamination of an optical device comprises an open-topped, closed-sided, and closed-bottomed housing cup partially defining a protected volume to enclose the optical device. A housing cap encloses a top of the housing cup and partially defines the protected volume. The housing cap includes a top collar having an open central aperture. A top cover laterally spans the central aperture of the top collar. An interface structure circumscribes the top cover to suspend the top cover downwardly into the housing cup from the top collar. The interface structure prevents direct contact between the top cover and the top collar.
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公开(公告)号：US20170057360A1
公开(公告)日：2017-03-02
申请号：US14837810
申请日：2015-08-27
Applicant: Texas Instruments Incorporated
Inventor： ARAVIND SAMBA MURTHY , DAVID PATRICK MAGEE
CPC classification number: B60L7/14 , B60L7/18 , B60L7/26 , B60L11/1803 , B60L15/2009 , B60L2220/12 , B60L2240/421 , B60L2240/423 , Y02T10/645 , Y02T10/646 , Y02T10/7005 , Y02T10/72 , Y02T10/7275
Abstract: A method of regenerative braking includes providing an electric motor including at least one stator and a rotor, a speed of the rotor, a motor controller that regulates a current level in the stator winding, a power inverter which controls an energy flow to the stator terminal, and an energy storage system (ESS) which exchanges energy with the motor. A battery management circuit is between the power inverter and the ESS, and a processor has an associated memory storing a regenerative braking (RB) algorithm. The RB algorithm during braking causes the motor controller to execute determining an RB torque value from the rotor speed that maximizes regenerative braking current, and the power inverter is used to redirect the RB current to maximize a power transfer from the motor to the ESS.
Abstract translation: 再生制动方法包括：提供包括至少一个定子和转子的电动机，转子的速度，调节定子绕组中的电流水平的电动机控制器，控制到定子端子的能量流的电力逆变器 以及与电动机交换能量的能量存储系统（ESS）。 电源管理电路位于电力逆变器和ESS之间，处理器具有存储再生制动（RB）算法的相关存储器。 制动过程中的RB算法使得电机控制器根据转子速度执行确定RB转矩值，从而使再生制动电流达到最大，并且使用电力逆变器来重定向RB电流以最大化从电动机到ESS的功率传递。
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公开(公告)号：US20150097500A1
公开(公告)日：2015-04-09
申请号：US14486303
申请日：2014-09-15
Applicant: Texas Instruments Incorporated
Inventor： DAVID PATRICK MAGEE , ANDRÉ VELTMAN , JORGE ZAMBADA
Abstract: A method of controlling an electric motor (motor) includes providing a processor having an associated memory storing a stator resistance (Rs) estimation (RSE) algorithm that is programmed to implement the RSE algorithm to execute steps including injecting a current waveform at an arbitrary frame of reference into the stator using a field-oriented-control (FOC) motor controller including an Id controller and an Iq controller, and measuring current and voltage values from the motor responsive to the injecting. The measured current and voltage values are then transformed into transformed current and voltage values in a d/q coordinate system. The transformed current and voltage values are low pass filtered to generate filtered d/q current and voltage values, and a value for Rs is estimated from the filtered d/q current and voltage values. The arbitrary frame of reference can be a time-varying frame of reference.
Abstract translation: 一种控制电动机（电动机）的方法包括提供一种处理器，该处理器具有存储定时电阻（Rs）估计（RSE）算法的相关存储器，该定时电阻（RS）估计（RSE）算法被编程以实现RSE算法，以执行包括以任意帧注入电流波形 使用包括Id控制器和Iq控制器的场定向控制（FOC）电动机控制器参考定子，并且响应于注射测量来自电动机的电流和电压值。 然后将测量的电流和电压值转换为d / q坐标系中的变换的电流和电压值。 转换的电流和电压值被低通滤波以产生滤波的d / q电流和电压值，并且根据滤波的d / q电流和电压值估计Rs的值。 任意的参照系可以是时变的参照系。
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Patent Agency Ranking
公开(公告)号：US20170167904A1
公开(公告)日：2017-06-15
申请号：US14964172
申请日：2015-12-09
Applicant: Texas Instruments Incorporated
Inventor： AMARDEEP SATHYANARAYANA , ANAND DABAK , DAVID PATRICK MAGEE
IPC: G01F1/66
Abstract: A method of ultrasound flow metering includes applying a first and second pulse train to an ultrasound transducer pair (T1, T2) positioned for coupling ultrasonic waves therebetween. Responsive to the first pulse train applied to T1, T1 transmits an ultrasonic wave received as received ultrasonic wave (R12) by T2 after propagating through fluid in a pipe. Responsive to the second pulse train applied to T2, T2 transmits an ultrasonic wave received as received ultrasonic wave by (R21) T1 after propagating through the fluid. During the pulse trains, R12 and R21 build up in amplitude to provide excitation portions. The pulse trains are terminated, so that R12 and R21 decay as a damped free oscillation. Windowing is applied to R12 and R21 to generate windowed portions. A signal delay between t12 and t21 (ΔTOF) is calculated using only windowed portions, and a fluid flow is calculated from the ΔTOF.
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公开(公告)号：US20160087567A1
公开(公告)日：2016-03-24
申请号：US14721823
申请日：2015-05-26
Applicant: Texas Instruments Incorporated
Inventor： ERIC JAMES THOMAS , DAVID PATRICK MAGEE
IPC: H02P21/06
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：US20160087563A1
公开(公告)日：2016-03-24
申请号：US14721716
申请日：2015-05-26
Applicant: Texas Instruments Incorporated
Inventor： DAVID PATRICK MAGEE , ERIC JAMES THOMAS
IPC: H02P6/18
CPC classification number: H02P6/182
Abstract: A method of determining the angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM) includes providing a processor having an associated memory, wherein the memory stores an angular position determination (APD) equation or hardware is included implementing the APD equation. The APD equation determines the angular position from N-phase measurements obtained from the stator windings associated with each of the N-phases. A voltage or a current is forced upon the stator terminals of the stator windings for each of the N-phases, a resulting stator current or stator voltage is sensed to provide the N-phase measurements responsive to the forcing of the voltage or current, and the APD equation is used to determine the angular position from the N-phase measurements.
Abstract translation: 确定N相永磁电动机（PMM）的转子的角位置（...）的方法包括提供具有相关联的存储器的处理器，其中存储器存储角位置确定（APD）等式或硬件 实施APD方程。 APD方程确定从与每个N相相关的定子绕组获得的N相测量的角度位置。 对于N相中的每一个，电压或电流被强制到定子绕组的定子端子上，产生的定子电流或定子电压被感测以响应于电压或电流的强制提供N相测量，以及 使用APD方程来确定来自N相测量的角位置。
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公开(公告)号：US20210018350A1
公开(公告)日：2021-01-21
申请号：US17064671
申请日：2020-10-07
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： AMARDEEP SATHYANARAYANA , ANAND G. DABAK , DAVID PATRICK MAGEE
IPC: G01F1/66
Abstract: In an embodiment, a system for measuring material flow in a pipe is disclosed. A first transducer is operable to transmit a first signal having a first frequency at a first time and receive a second signal at a second time, and a second transducer spaced apart from the first transducer and is operable to receive the first signal and transmit the second signal having the first frequency. A signal processing circuit communicatively coupled to the first transducer and the second transducer, the signal processing circuit is operable to determine a first envelope of the first signal and a second envelope of the second signal and calculate a flow rate based on the first envelope of the first signal and the second envelope of the second signal.
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公开(公告)号：US20200282435A1
公开(公告)日：2020-09-10
申请号：US16694403
申请日：2019-11-25
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： DAVID PATRICK MAGEE , JAMES KELLY GRIFFIN
Abstract: This disclosure relates to systems and methods for ultrasonic lens cleaning. In an example, an ultrasonic lens cleaning system can be configured to apply sequences that include at least one driver signal adapted to drive a transducer adaptively coupled to a top cover. The transducer can be excited based on the sequences to vibrate the top cover to remove a contaminant from a surface of the top cover. The applying of the sequences can include applying a first sequence to the transducer based on a first set of sequence parameters, applying a second sequence to the transducer based on a second set of sequence parameters, and applying a third sequence to the transducer based on a third set of sequence parameters.
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