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公开(公告)号：US20200284741A1
公开(公告)日：2020-09-10
申请号：US16883165
申请日：2020-05-26
Applicant: Texas Instruments Incorporated
Inventor： David Patrick Magee , Stephen John Fedigan
Abstract: In described examples, one or more devices include: apparatus including a lens element and a transducer to vibrate the lens element at an operating frequency when operating in an activated state; and controller circuitry. The controller circuitry is arranged to measure an impedance of the apparatus, to determine an estimated temperature of the apparatus in response to the measured impedance, to compare the estimated temperature against a temperature threshold for delineating an operating temperature range of the apparatus, and to toggle an activation state of the transducer in response to comparing the estimated temperature against the temperature threshold.
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12.发明授权公开(公告)号：US10596604B2
公开(公告)日：2020-03-24
申请号：US15492286
申请日：2017-04-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , David Patrick Magee
Abstract: Methods and apparatus for using two stage ultrasonic lens cleaning for water removal are disclosed. An 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. A signal generator can generate a first signal including a first frequency to be coupled with the ultrasonic transducer mechanically coupled to the surface, and can generate a second signal including a second frequency to be coupled with the ultrasonic transducer mechanically coupled to the surface. Switching circuitry can activate the ultrasonic transducer at the first frequency to reduce the droplet from a first size to a second size, and to activate the ultrasonic transducer at the second frequency to reduce the droplet from the second size to a third size.
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公开(公告)号：US10447186B2
公开(公告)日：2019-10-15
申请号：US15615951
申请日：2017-06-07
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Stephen John Fedigan , Anuj Jain , David Patrick Magee
Abstract: A motor control system for a permanent magnet synchronous motor (PMSM) uses two linear Hall devices to produce a first signal indicative of a strength of a first magnetic field component produced by a set of rotor magnets and to simultaneously produce a second signal indicative of a strength of second magnetic field component produced by the rotor magnets that is approximately orthogonal to the first magnetic field component. An angular position and angular velocity of the rotor is calculated based on the first signal and the second signal. A plurality of phase signals is produced based on the calculated angular position and angular velocity. Current in a plurality of field windings of the motor is controlled using the plurality of phase signals.
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14.发明申请公开(公告)号：US20180188526A1
公开(公告)日：2018-07-05
申请号：US15395665
申请日：2016-12-30
Applicant: Texas Instruments Incorporated
Inventor： Yunhong Li , David Patrick Magee , Stephen John Fedigan
CPC classification number: G02B27/0006 , B08B7/028 , B60R11/04 , B60S1/56
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：US20180154406A1
公开(公告)日：2018-06-07
申请号：US15583057
申请日：2017-05-01
Applicant: Texas Instruments Incorporated
Inventor： David Patrick Magee , Stephen John Fedigan
CPC classification number: G02B27/0006 , G02B13/06 , G02B13/16
Abstract: Disclosed examples include lens cleaning systems, drivers and operating methods, including a transducer mechanically coupled to a lens, a driver to provide an oscillating drive signal to the transducer and a controller to control the drive signal frequency to vibrate the lens at frequencies in a range of interest. The controller determines a measured resonant frequency of the lens cleaning system in the range of interest according to a transducer feedback signal and selectively performs a lens cleaning operation if the measured resonant frequency differs from a baseline resonant frequency of the lens cleaning system for a clean lens.
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Patent Agency Ranking
公开(公告)号：US20180031826A1
公开(公告)日：2018-02-01
申请号：US15225212
申请日：2016-08-01
Applicant: Texas Instruments Incorporated
Inventor： Stephen John Fedigan , David Patrick Magee , Yunhong Li
CPC classification number: G02B27/0006 , B08B7/028 , G02B3/0075
Abstract: A lens structure system. The system comprises a lens structure and a multi-segmented transducer coupled to the lens structure. The multi-segmented transducer comprises a plurality of segments. For each segment in the plurality of segments, there also is a first conductor and a second conductor electrically coupled to the segment.
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公开(公告)号：US09705436B2
公开(公告)日：2017-07-11
申请号：US14960164
申请日：2015-12-04
Applicant: Texas Instruments Incorporated
Inventor： Stephen John Fedigan , Anuj Jain , David Patrick Magee
Abstract: A motor control system for a permanent magnet synchronous motor (PMSM) uses two linear Hall devices to produce a first signal indicative of a strength of a first magnetic field component produced by a set of rotor magnets and to simultaneously produce a second signal indicative of a strength of second magnetic field component produced by the rotor magnets that is approximately orthogonal to the first magnetic field component. An angular position and angular velocity of the rotor is calculated based on the first signal and the second signal. A plurality of phase signals is produced based on the calculated angular position and angular velocity. Current in a plurality of field windings of the motor is controlled using the plurality of phase signals.
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公开(公告)号：US20160097638A1
公开(公告)日：2016-04-07
申请号：US14505543
申请日：2014-10-03
Applicant: Texas Instruments Incorporated
Inventor： Stephen John Fedigan
Abstract: Systems, apparatus and methods are presented for sensing or estimating a tilt angle, in which a current flowing in an eccentric mass motor is sensed, and a detector circuit assesses the amplitude of a synchronous component of the motor current and provides an output signal or value indicating a tilt angle relative to a gravitational axis at least partially according to the amplitude of the synchronous component of the motor current.
Abstract translation: 提出了用于感测或估计倾斜角的系统，装置和方法，其中感测在偏心质量马达中流动的电流，并且检测器电路评估电动机电流的同步分量的振幅并提供输出信号或值 至少部分地根据电动机电流的同步分量的幅度显示相对于重力轴的倾斜角。
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公开(公告)号：US20150372631A1
公开(公告)日：2015-12-24
申请号：US14309735
申请日：2014-06-19
Applicant: Texas Instruments Incorporated
Inventor： Stephen John Fedigan , Sandun Shivantha Kuruppu , Paul LeRoy Brohlin
CPC classification number: H02P27/06 , G01R27/16 , G01R31/343 , H02H7/0822 , H02P6/185 , H02P29/0241
Abstract: A motor control circuit includes a processor configured to calculate a plurality of motor impedances from measurements of an excitation voltage on a power bus to a motor and measurements of a plurality of currents through the motor resulting from the excitation voltage, and the processor configured to calculate individual winding inductances in the motor, based on the measured motor impedances, and configured to determine whether there is an inter-turn winding fault based on the calculated individual winding inductances.
Abstract translation: 电动机控制电路包括处理器，其被配置为从电力总线上的激励电压到电动机的测量值以及由激励电压产生的通过电动机的多个电流的测量来计算多个电动机阻抗，并且处理器被配置为计算 基于所测量的电动机阻抗，并且被配置为基于所计算的各个绕组电感来确定是否存在匝间绕组故障。
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公开(公告)号：US12042829B2
公开(公告)日：2024-07-23
申请号：US17020625
申请日：2020-09-14
Applicant: TEXAS INSTRUMENTS INCORPORATED
CPC classification number: B08B7/028 , G02B27/00 , G02B27/0006 , F26B5/02
Abstract: For surface wetting control, an apparatus can expel fluid from a droplet on a surface using a transducer mechanically coupled to the surface. A first area of the surface can have a first wettability for the fluid, and a second area of the surface can have a second wettability for the fluid. The first wettability of the first area of the surface can be greater than the second wettability of the second area of the surface. The first area and the second area can have a patterned arrangement.
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