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1.发明公开公开(公告)号：US20240146111A1
公开(公告)日：2024-05-02
申请号：US18498272
申请日：2023-10-31
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar
Abstract: In one or more examples, an apparatus may comprise a wireless power transmitter. The apparatus may include transmitter circuitry including a transmit coil to inductively couple with a receive coil of a wireless power receiver. The apparatus may further include a controller to control the transmitter circuitry to generate a wireless power signal in the transmit coil; perform demodulation on a communication signal, modulated over the wireless power signal, in attempt to decode one or more packets from the wireless power receiver; and perturb an operating point of the transmitter circuitry responsive to identifying a failure in decoding the one or more packets.
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公开(公告)号：US20240405612A1
公开(公告)日：2024-12-05
申请号：US18679564
申请日：2024-05-31
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: A method comprises generating a wireless power transmission signal in one or more transmit coils of a wireless power transmitter and, in a multi-frequency operation of the wireless power transmitter, controlling an operating frequency of the wireless power transmission signal to repeatedly switch between a fundamental frequency and one of a lower frequency and an upper frequency in an alternating manner. The lower frequency is offset from the fundamental frequency by a first offset. The upper frequency is offset from the fundamental frequency by a second offset. The second offset is different from the first offset. The first offset associated with the lower frequency and the second offset associated with the upper frequency are to ensure a transmit power in the multi-frequency operation is substantially the same as a transmit power at the fundamental frequency.
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公开(公告)号：US12040632B2
公开(公告)日：2024-07-16
申请号：US17664769
申请日：2022-05-24
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: Object detection in wireless power systems and related system, methods, and devices are disclosed. A controller for a wireless power transmitter includes a measurement voltage potential input terminal and a processing core. The processing core is to determine an average of peak to peak amplitude differences present in sampled measurement voltage potentials for each of the plurality of transmit coils, determine a lowest average of the peak to peak amplitude differences, and select a transmit coil corresponding to the lowest average of the peak to peak amplitude differences to transmit wireless power to a receive coil of a wireless power receiver. A wireless power system includes a tank circuit selectively including any one of a plurality of transmit coils.
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公开(公告)号：US20220149659A1
公开(公告)日：2022-05-12
申请号：US17649214
申请日：2022-01-28
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: Apparatuses and methods related to a converter are disclosed. An apparatus includes a converter and a controller. The converter converts an input voltage potential to an output voltage potential. The input voltage potential and the output voltage potential include direct current (DC) voltage potentials. The controller generates pulse width modulation (PWM) signals responsive to a duty cycle control signal, controls the converter via the PWM signals in a buck mode when the duty cycle control signal is less than a predetermined maximum buck value, and controls the converter via the PWM signals in a cascaded buck-boost mode (CBB mode) when the duty cycle control signal is greater than the predetermined maximum buck value. A duty cycle of at least a portion of the PWM signals transitions linearly with the duty cycle control signal from the buck mode to the CBB mode.
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公开(公告)号：US20220131412A1
公开(公告)日：2022-04-28
申请号：US17647431
申请日：2022-01-07
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: Various methods relate to digital demodulation for wireless power transmission. A method of operating a wireless power transmitter includes transmitting, with a transmitter coil of a wireless power transmitter, power to a receiver coil of a wireless power receiver. The method also includes sampling one or more electrical signals of the wireless power transmitter. The one or more electrical signals are modulated responsive to alteration of electrical conditions at the wireless power receiver. The method further includes digitally demodulating the sampled one or more electrical signals using a digital filter to obtain a communication from the wireless power receiver. The digital filter includes at least two low pass filter stages that each filter out a fundamental frequency used for the transmission of the power to the receiver coil.
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Patent Agency Ranking
公开(公告)号：US20210281119A1
公开(公告)日：2021-09-09
申请号：US16863865
申请日：2020-04-30
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: Object detection for wireless power transmitters and related systems, methods, and devices are disclosed. A controller for a wireless power transmitter is configured to receive a measurement voltage potential responsive to a tank circuit signal at a tank circuit, provide an alternating current (AC) signal to each of the plurality of transmit coils one at a time, and determine at least one of a resonant frequency and a quality factor (Q-factor) of the tank circuit responsive to each selected transmit coil of the plurality of transmit coils. The controller is also configured to select a transmit coil to use to transmit wireless power to a receive coil of a wireless power receiver responsive to the determined at least one of the resonant frequency and the Q-factor for each transmit coil of the plurality of transmit coils.
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7.发明公开公开(公告)号：US20230231420A1
公开(公告)日：2023-07-20
申请号：US18186837
申请日：2023-03-20
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
CPC classification number: H02J50/60 , G01R27/2611 , H02J50/12 , H02J50/402
Abstract: Object detection for wireless power transmitters and related systems, methods, and devices are disclosed. A controller for a wireless power transmitter is configured to receive a measurement voltage potential responsive to a tank circuit signal at a tank circuit, provide an alternating current (AC) signal to each of the plurality of transmit coils one at a time, and determine at least one of a resonant frequency and a quality factor (Q-factor) of the tank circuit responsive to each selected transmit coil of the plurality of transmit coils. The controller is also configured to select a transmit coil to use to transmit wireless power to a receive coil of a wireless power receiver responsive to the determined at least one of the resonant frequency and the Q-factor for each transmit coil of the plurality of transmit coils.
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公开(公告)号：US11637450B2
公开(公告)日：2023-04-25
申请号：US17647431
申请日：2022-01-07
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: Various methods relate to digital demodulation for wireless power transmission. A method of operating a wireless power transmitter includes transmitting, with a transmitter coil of a wireless power transmitter, power to a receiver coil of a wireless power receiver. The method also includes sampling one or more electrical signals of the wireless power transmitter. The one or more electrical signals are modulated responsive to alteration of electrical conditions at the wireless power receiver. The method further includes digitally demodulating the sampled one or more electrical signals using a digital filter to obtain a communication from the wireless power receiver. The digital filter includes at least two low pass filter stages that each filter out a fundamental frequency used for the transmission of the power to the receiver coil.
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公开(公告)号：US20220037933A1
公开(公告)日：2022-02-03
申请号：US17451673
申请日：2021-10-21
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: Object detection for wireless power transmitters and related systems, methods, and devices are disclosed. A controller for a wireless power transmitter is configured to receive a measurement voltage potential responsive to a tank circuit signal at a tank circuit, provide an alternating current (AC) signal to each of the plurality of transmit coils one at a time, and determine at least one of a resonant frequency and a quality factor (Q-factor) of the tank circuit responsive to each selected transmit coil of the plurality of transmit coils. The controller is also configured to select a transmit coil to use to transmit wireless power to a receive coil of a wireless power receiver responsive to the determined at least one of the resonant frequency and the Q-factor for each transmit coil of the plurality of transmit coils.
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公开(公告)号：US11239696B2
公开(公告)日：2022-02-01
申请号：US16843726
申请日：2020-04-08
Applicant: Microchip Technology Incorporated
Inventor： Santosh Bhandarkar , Alex Dumais
Abstract: Systems, methods, and devices related to a converter of a wireless power transmitter are disclosed. A controller for a wireless power transmitter is configured to sample an output voltage potential to produce a digital output voltage potential, determine an error between an output reference voltage potential and the digital output voltage potential, filter the error to determine a filtered error, and apply an adaptive gain to the filtered error to determine a duty cycle control signal. The adaptive gain is determined responsive to a converter input voltage potential of the converter of the wireless power transmitter. The controller is further configured to determine a controller output including buck pulse width modulation (PWM) signals and boost PWM signals based on the duty cycle control signal, the controller output configured to control the converter of the wireless power transmitter.
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