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41.发明申请公开(公告)号：US20180304282A1
公开(公告)日：2018-10-25
申请号：US15492395
申请日：2017-04-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
CPC classification number: B05B5/002 , B05B17/0661 , B05B17/0669 , B60S1/56
Abstract: Methods and apparatus for electrostatic control of expelled material for lens cleaners are disclosed. In certain described examples, an apparatus can expel fluid by atomization from a central area of the surface using an ultrasonic transducer mechanically coupled to the surface. A first electrode can be arranged relative to the central area of the surface. A second electrode can be located in a peripheral area relative to the central area of the surface, in which a voltage can be applied between the first and second electrodes to attract atomized fluid at the peripheral area.
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公开(公告)号：US20170361360A1
公开(公告)日：2017-12-21
申请号：US15186944
申请日：2016-06-20
Applicant: Texas Instruments Incorporated
Inventor： Yunhong Li , David P. Magee , Stephen John Fedigan
CPC classification number: B08B7/028 , G02B27/0006
Abstract: Disclosed examples include ultrasonic lens cleaning systems and driver circuits to clean a lens using four or more transducer segments mechanically coupled to the lens, in which the driver circuit provides phase shifted oscillating signals to the transducer segments to generate a mechanical traveling wave rotating around the center axis of the lens to vibrate the lens for improved ultrasonic cleaning.
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公开(公告)号：US09602044B2
公开(公告)日：2017-03-21
申请号：US14173589
申请日：2014-02-05
Applicant: Texas Instruments Incorporated
Inventor： Stephen John Fedigan
Abstract: A motor driver combination for controlling a travelling wave motor includes a pre-driver including a microcontroller unit (MCU) chip including a plurality of high-resolution pulse width modulation (HRPWM) generators providing a frequency resolution better than ten Hz. A digital bus is for transferring digital words received from a controller in a servo and velocity control block to the HRPWM generators, where the digital words provide travelling wave motor operating performance information from the motor during its operation. A clock oscillator providing an accuracy of at least eighty (80) parts per million (ppm) is coupled to or provided by the MCU chip for each of the high-resolution PWM generators. A motor driver includes a plurality of power drivers for providing phased outputs for driving the travelling wave motor including a plurality of inputs coupled to outputs of the plurality of HRPWM generators. The travelling wave motor can be an ultrasonic motor.
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公开(公告)号：US20160315576A1
公开(公告)日：2016-10-27
申请号：US15200683
申请日：2016-07-01
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：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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Patent Agency Ranking
46.发明公开公开(公告)号：US20230161154A1
公开(公告)日：2023-05-25
申请号：US18158878
申请日：2023-01-24
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yunhong Li , David Magee , Stephen John Fedigan
CPC classification number: G02B27/0006 , B08B7/028 , B60S1/56 , B60R11/04
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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47.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：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：US20200233208A1
公开(公告)日：2020-07-23
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：US10415965B2
公开(公告)日：2019-09-17
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.
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