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公开(公告)号：US20150084576A1
公开(公告)日：2015-03-26
申请号：US14337595
申请日：2014-07-22
Applicant: Texas Instruments Incorporated
Inventor： David Patrick Magee
IPC: H02P21/00
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. A periodic excitation signal in the form of a square wave allows for analysis of the response of the motor without requiring demodulation, which allows the frequency of the excitation signal to be above the audible range. 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。 以方波形式的周期性激励信号允许分析电动机的响应而不需要解调，这允许激励信号的频率高于可听范围。 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：US12128459B2
公开(公告)日：2024-10-29
申请号：US16827344
申请日：2020-03-23
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: A signal generator has a generator output. The signal generator is configured to generate first and second signals at the generator output. The first signal has a first frequency, and the second signal has a second frequency. Switching circuitry has a circuitry input and a circuitry output. The circuitry input is coupled to the generator output. The circuitry output is adapted to be coupled to an ultrasonic transducer mechanically coupled with a surface. The switching circuitry is configured to: provide the first signal to the ultrasonic transducer at the first frequency to reduce a fluid droplet on the surface from a first size to a second size; and provide the second signal to the ultrasonic transducer at the second frequency to reduce the fluid droplet from the second size to a third size.
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23.发明授权公开(公告)号：US11561390B2
公开(公告)日：2023-01-24
申请号：US17064645
申请日：2020-10-07
Applicant: Texas Instruments Incorporated
Inventor： Yunhong Li , David Patrick Magee , Stephen John Fedigan
Abstract: A lens structure system with a lens structure and a multi-segmented transducer coupled to the lens structure. Each segment in the plurality of segments has a first conductor and a second conductor, wherein the first conductor and the second conductor are electrically coupled to the segment. The system also has circuitry for applying a voltage to selected segments in the plurality of segments with standing wave signals and traveling wave signals.
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公开(公告)号：US11527978B2
公开(公告)日：2022-12-13
申请号：US17347753
申请日：2021-06-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Eric James Thomas , David Patrick Magee
Abstract: A method of determining angular position (θ) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
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公开(公告)号：US11515822B2
公开(公告)日：2022-11-29
申请号：US16865600
申请日：2020-05-04
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： David L. Wilson , Jorge Zambada Tinoco , David Patrick Magee
Abstract: An adaptive torque disturbance cancellation method and motor control system for rotating a load are described. The system has: (i) a speed controller for receiving a first input signal indicating a desired motor speed and, in response, for outputting a motor control signal; (ii) current sensing circuitry for sensing current through a motor that rotates in response to the speed controller; (iii) circuitry for storing, into a storage device, history data representative of the current through a motor when the motor operates to rotate the load; and (iv) circuitry for modifying the motor control signal in response to the history data.
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Patent Agency Ranking
公开(公告)号：US11415795B2
公开(公告)日：2022-08-16
申请号：US16834632
申请日：2020-03-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee , Yunhong Li
Abstract: A lens structure system includes a lens structure and a multi-segmented transducer coupled to the lens structure. The multi-segmented transducer includes segments. Each segment is electrically coupled to a respective first conductor and a respective second conductor.
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公开(公告)号：US20210309112A1
公开(公告)日：2021-10-07
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：US11024302B2
公开(公告)日：2021-06-01
申请号：US15706128
申请日：2017-09-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tarkesh Pande , Lorin Paul Netsch , David Patrick Magee
Abstract: Systems and methods are provided for an automated speech recognition system. A microphone records a keyword spoken by a user, and a front end divides the recorded keyword into a plurality of subunits, each containing a segment of recorded audio, and extracts a set of features from each of the plurality of subunits. A decoder assigns one of a plurality of content classes to each of the plurality of subunits according to at least the extracted set of features for each subunit. A quality evaluation component calculates a score representing a quality of the keyword from the content classes assigned to the plurality of subunits.
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公开(公告)号：US11011155B2
公开(公告)日：2021-05-18
申请号：US16051607
申请日：2018-08-01
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Tarkesh Pande , Lorin Paul Netsch , David Patrick Magee
Abstract: An example method includes: receiving a test phrase; comparing feature vectors of the test phrase to contents of a first database to generate a first score; comparing the feature vectors of the test phrase to contents of a second database to generate a second score; comparing feature vectors of the contents of the second database to the contents of the first database to generate a third score; comparing the feature vectors of the contents of the second database to a model of the test phrase to generate a fourth score; determining a first difference score based on a difference between the first and second scores; determining a second difference score based on a difference between the third and fourth scores; and generating a difference confidence score based on a lesser of the first and second difference scores.
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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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