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公开(公告)号：US20240213815A1
公开(公告)日：2024-06-27
申请号：US18288203
申请日：2022-04-11
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Aleksei Agafonov , Antonius Adriaan Maria Staring
Abstract: A power transfer system comprises a power transmitter (101) wirelessly providing power to a power receiver (105) via an inductive power transfer signal. Communication from power receiver (105) to the power transmitter (101) is by load modulation using the power transfer signal. The communication uses load modulation where each symbol is represented by a chip sequence being a sequence of modulation load values. The power transmitter (101) comprises a first communicator (207) which correlates a chip sequence received from the power receiver with a set of reference chip sequences being linked to data symbol values and determines the data symbol as the data symbol linked to a reference chip sequence for which the highest correlation with the first chip sequence is determined.
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公开(公告)号：US11955811B2
公开(公告)日：2024-04-09
申请号：US17227417
申请日：2021-04-12
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Antonius Adriaan Maria Staring , Andries Van Wageningen
Abstract: A power transmitter (101) of a wireless power transfer system comprises a resonance including a transmitter coil (103) for generating a power transfer signal for wirelessly transferring power to a power receiver (105). Further, a driver (1303) generates a drive signal for the resonance circuit (201) and a message receiver (1305) is arranged to receive messages from the power receiver (105). A power loop controller (1307) implements a power control loop by adapting the power of the drive signal in response to power control messages received from the power receiver (105). However, the regulation is subject to a constraint of at least one of a current or voltage of the resonance circuit and a power of the drive signal being below a maximum limit. Further, the power transmitter (101) comprises an adapter (1309) which adapts the maximum limit in response to a load indication indicative of a loading of the power transfer signal by the power receiver (105).
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公开(公告)号：US11139859B2
公开(公告)日：2021-10-05
申请号：US16841950
申请日：2020-04-07
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Antonius Adriaan Maria Staring , Andries Van Wageningen
Abstract: A power transmitter (101) is arranged to transfer power to a power receiver (105) using a wireless inductive power signal. The power transmitter (101) comprises a power signal generator (207) which drives an inductor (103) to provide the power signal to an inductor of the power receiver (105). A power loop control is employed by the power receiver (105) providing power control error messages to the power transmitter (101). The power transmitter (101) comprises a query message processor (209) which can detect a query message received from the power receiver (105) using load modulation of the power signal. A modification processor (211) is arranged to modify a response of the power loop controller to the power control error messages dependent on the query message. The power receiver (105) can detect the modifications to the operation of the power control and thus can interpret this as a response to the query message.
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公开(公告)号：US11128172B2
公开(公告)日：2021-09-21
申请号：US16346160
申请日：2017-11-06
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Wilhelmus Gerardus Maria Ettes , Antonius Adriaan Maria Staring , Lennaert Quirijn Bronts , Eddy Gerrit Veltman , Andries Van Wageningen
Abstract: A power transmitter (501) for a wireless power transfer system includes a parallel resonance circuit (601) comprising at a transmitter coil (503) for generating the power transfer signal. A power source (605) has a current sink terminal and a power source terminal providing current to the parallel resonance circuit (601) with a limited rate of change of the current drawn. A first switch element (607) is coupled between a first end of the parallel resonance circuit (601) and the current sink terminal. A second switch element (609) is coupled between the other end and the current sink terminal. A driver (611) generates a cyclic drive signal such that each cycle comprises a two time intervals in which one switch element (607, 609) is closed and the other (607, 609) is open; and a third time interval in which both the first switch element (607) and the second switch element (609) are closed, the third time interval being between the other two intervals.
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公开(公告)号：US12249845B2
公开(公告)日：2025-03-11
申请号：US18607603
申请日：2024-03-18
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Antonius Adriaan Maria Staring , Andries Van Wageningen
Abstract: A power transmitter (101) of a wireless power transfer system comprises a resonance including a transmitter coil (103) for generating a power transfer signal for wirelessly transferring power to a power receiver (105). Further, a driver (1303) generates a drive signal for the resonance circuit (201) and a message receiver (1305) is arranged to receive messages from the power receiver (105). A power loop controller (1307) implements a power control loop by adapting the power of the drive signal in response to power control messages received from the power receiver (105). However, the regulation is subject to a constraint of at least one of a current or voltage of the resonance circuit and a power of the drive signal being below a maximum limit. Further, the power transmitter (101) comprises an adapter (1309) which adapts the maximum limit in response to a load indication indicative of a loading of the power transfer signal by the power receiver (105).
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Patent Agency Ranking
公开(公告)号：US20250070599A1
公开(公告)日：2025-02-27
申请号：US18276058
申请日：2022-02-15
Applicant: KONINKLIJKE PHILIPS N.V.
Abstract: A power transmitter (101) comprises a driver (201) generating a drive signal for an output resonance circuit comprising transmitter coil (103) generating a power transfer signal. A resonance detector (307) determines a coupled resonance frequency for the output resonance circuit during where the coupled resonance frequency is a resonance frequency for the output resonance circuit for the transmitter coil (103) being coupled to a receiver coil (107) which is part of a power transfer input resonance circuit of the power receiver (105). The input resonance circuit has a quality factor of no less than ten. An estimation circuit (309) determines a coupling factor estimate for the coupling between the transmitter coil (103) and the receiver coil (107) in response to the first effective resonance frequency and possibly a non-coupled resonance frequency of the output resonance circuit or the input resonance circuit. An adapter (311) sets an operating parameter in response to the coupling factor estimate.
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公开(公告)号：US11223236B2
公开(公告)日：2022-01-11
申请号：US16078147
申请日：2017-02-20
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Andries Van Wageningen , Antonius Adriaan Maria Staring
Abstract: A power transmitter (101) of a wireless power transfer system provides wireless power to a power receiver (105). The power transmitter (101) comprises a variable resonance circuit (201) generating an inductive power transfer signal in response to a drive signal. The resonance circuit comprises a capacitive and inductive impedance (201, 203), at least one of which is variable. The resonance frequency can be varied by at least one of the impedances being variable in response to a control signal. A driver (205) generates the drive signal with a variable drive frequency. A frequency modulator (305) applies frequency modulation to the drive signal by varying the variable drive frequency in response to data values to be transmitted to the power receiver (105). An adapter (309) generates the control signal in response to the data values such that the variable resonance frequency follows the variations in the drive frequency resulting from the frequency modulation of the drive signal.
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公开(公告)号：US11038381B2
公开(公告)日：2021-06-15
申请号：US16615570
申请日：2018-05-25
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Andries Van Wageningen , Wilhelmus Gerardus Maria Ettes , Eddy Gerrit Veltman , Antonius Adriaan Maria Staring , Richard Henricus Maria Theelen , Johannes Gerardus Fredericus Kablau
Abstract: A power transmitter (101) for a wireless power transfer system comprises a transmitter coil (103) and a driver (201) generates a drive signal for the transmitter coil (103) employing a repeating time frame with a power transfer time interval and a foreign object detection time interval. A test generator (211) generates a test drive signal for a test coil (209) during the foreign object detection time interval. A foreign object detector (207) performs a foreign object detection test based on a measured parameter for the test drive signal. Prior to entering a power transfer phase, an adapter (213) controls the power transmitter (101) to operate in a foreign object detection initialization mode in which a preferred value of a signal parameter for the test drive signal is determined in response to at least a first message received from the power receiver (105). During the foreign object detection time interval the signal parameter of is set to the preferred value.
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公开(公告)号：US10791204B2
公开(公告)日：2020-09-29
申请号：US15946007
申请日：2018-04-05
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Antonius Adriaan Maria Staring , Andries van Wageningen
IPC: H04L29/06
Abstract: A method of encoding data packet by encoding type information and size information of the data packet into the same field. The data packet comprises a header part and a message part. The header part comprises at least one bit for indicating the type of the data packet, where the method includes obtaining the size information of the data packet based on the at least one bit.
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公开(公告)号：US10523052B2
公开(公告)日：2019-12-31
申请号：US15503157
申请日：2015-09-14
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Wilhelmus Gerardus Maria Ettes , Antonius Adriaan Maria Staring , Klaas Jacob Lulofs , Eddy Gerrit Veltman
Abstract: A wireless power transfer system includes a power receiver and a power transmitter providing power using an inductive power signal. The power transmitter includes a resonance circuit having capacitive and inductive impedances, and a driver configured to generate a drive signal for the resonance circuit. A frequency modification circuit is configured to control the resonance frequency of the resonance circuit by slowing a state change for the capacitive and/or inductive impedance for a fractional time interval of at least some cycles of the drive signal, The frequency modification circuit is configured to align at least one of a start time and an end time for the fractional time interval to transitions of a timing signal. In the power transmitter, the driver is configured to generate the timing signal to have transitions synchronized to the drive signal. The slowing may be by impeding current flow between the capacitive and inductive impedances.
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