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公开(公告)号：US11881719B2
公开(公告)日：2024-01-23
申请号：US17020537
申请日：2020-09-14
申请人： Spark Connected LLC
IPC分类号： H02J50/12 , H02M3/158 , H02J50/80 , H02J50/10 , H02J50/00 , A47B21/06 , G06F1/18 , H02J50/60 , G01R33/00 , G01R33/02 , G01R33/07 , G01R33/10
CPC分类号： H02J50/12 , A47B21/06 , G01R33/0094 , G01R33/0206 , G01R33/07 , G01R33/10 , G06F1/189 , H02J50/005 , H02J50/10 , H02J50/60 , H02J50/80 , H02M3/1582 , A47B2021/066 , A47B2200/008
摘要： In an embodiment, a method includes: wirelessly transmitting power using a transmitter LC tank; wirelessly receiving power from the transmitter LC tank using a receiver LC tank; interrupting wirelessly transmitting power for a slot period; during the slot period, shorting the receiver LC tank; during the slot period and after shorting the receiver LC tank, measuring a transmitter signal associated with the transmitter LC tank; determining a power loss associated with the wirelessly transmitting power based on the measured transmitter signal; and detecting a metallic object based on the determined power loss.
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公开(公告)号：US11581757B2
公开(公告)日：2023-02-14
申请号：US17345957
申请日：2021-06-11
申请人： Spark Connected LLC
摘要： In accordance with an embodiment, a wireless power transmitter includes a charging surface, a transmitting antenna configured to generate an electromagnetic field extending above the charging surface, a sensing array disposed between the transmitting antenna and the charging surface, and a controller coupled to the sensing array. The sensing array includes a plurality of sensors. Each sensor of the plurality of sensors is configured to generate a respective signal indicative of a strength of the electromagnetic field. The controller is configured to detect a presence of a metallic object, other than a receiving antenna of a power receiver, in the electromagnetic field based on the respective signal generated by one or more sensors of the plurality of sensors.
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公开(公告)号：US11515739B2
公开(公告)日：2022-11-29
申请号：US17175686
申请日：2021-02-14
申请人： Spark Connected LLC
摘要： In an embodiment, a method includes: wirelessly transmitting power using a transmitter LC tank to a wireless power receiver having a receiver LC tank; receiving a first received power packet from the wireless power receiver, the first received power packet including a received power value field indicative of a power level; determining a first power difference between transmitted power and received power based on the first received power packet; calculating a first received power compensation factor based on the first power difference; interrupting wirelessly transmitting power for a first slot period after receiving the first received power packet; performing a first measurement of a first signal associated with the transmitter LC tank during the first slot period; determining a first Q factor value based on the first measurement; comparing the first Q factor value with a reference Q factor value; and detecting a metallic object based on the comparison.
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公开(公告)号：US20220360117A1
公开(公告)日：2022-11-10
申请号：US17732265
申请日：2022-04-28
申请人： Spark Connected LLC
摘要： A method includes: wirelessly receiving power with a receiver resonant tank from a transmitting coil; rectifying a receiver voltage by switching first and second legs of a synchronous rectifier based on a zero-crossing of a receiver current flowing through the receiver resonant tank to produce a rectified voltage; and while wirelessly receiving power with the receiver resonant tank, encoding data by causing transitions in a transmitter current flowing through the transmitting coil using the synchronous rectifier, where encoding the data includes: applying a first sudden delay period in a first direction to a first switching of the first and second legs to cause a transition in the transmitter current; and applying a first gradual delay in the first direction to subsequent switching of the first and second legs, where the first gradual delay is gradually incremented by an increment period that is smaller than the first sudden delay period.
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公开(公告)号：US20220006332A1
公开(公告)日：2022-01-06
申请号：US17364069
申请日：2021-06-30
申请人： Spark Connected LLC
摘要： In an embodiment, a method includes: wirelessly transmitting power to a receiving coil from a transmitting coil, where the receiving coil is in a wireless power transmission space of the transmitting coil; measuring an output of a sensor during a first time to generate a first measurement; measuring the output of the sensor during a second time to generate a second measurement, the second time being after the first time; and when a magnitude of a difference between the first measurement and the second measurement is higher than a predetermined threshold, stopping wirelessly transmitting power to the receiving coil with the transmitting coil.
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公开(公告)号：US20210083518A1
公开(公告)日：2021-03-18
申请号：US17020326
申请日：2020-09-14
申请人： Spark Connected LLC
摘要： In an embodiment, a method for providing power to a load using a wireless power receiver includes: wirelessly receiving power using an LC tank; rectifying a voltage of the LC tank using a rectifier; setting a switched-mode power supply coupled between the rectifier and the load in bypass mode; after setting the switched-mode power supply in bypass mode, providing power to the load without switching transistors of the switched-mode power supply; and when wireless power reception is interrupted, providing power to the load by switching one or more transistors of the switched-mode power supply.
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公开(公告)号：US12053055B2
公开(公告)日：2024-08-06
申请号：US17236815
申请日：2021-04-21
申请人： Spark Connected LLC
摘要： In an embodiment, a method for heating a personal device using a wirelessly-powered heating device includes: wirelessly receiving power with a receiving coil of the wirelessly-powered heating device, the receiving coil located inside the personal device, where the receiving coil is coupled to a capacitor of the wirelessly-powered heating device to form a receiver resonant tank; and heating the personal device with heat produced by a resistance of the receiving coil, where the receiving coil functions as a receiver antenna and as a heat producing element.
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公开(公告)号：US11855463B2
公开(公告)日：2023-12-26
申请号：US17532710
申请日：2021-11-22
申请人： Spark Connected LLC
IPC分类号： H02J50/12 , G06F3/0354 , G06F3/038 , G04G19/00 , H02J50/40 , H02J50/70 , G04C10/00 , H02J50/90
CPC分类号： H02J50/12 , G04C10/00 , G04G19/00 , G06F3/038 , G06F3/03545 , H02J50/402 , H02J50/70 , H02J50/90
摘要： An apparatus includes an enclosure, a first ferrite core disposed inside the enclosure, a wireless power receiver that includes a first receiving coil wrapped around the first ferrite core between the first ferrite core and the enclosure, and an alignment mark configured to be aligned with a center of a transmitting coil of a wireless power transmitter, wherein the alignment mark is not aligned with a center of the first receiving coil.
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公开(公告)号：US11509169B2
公开(公告)日：2022-11-22
申请号：US16298769
申请日：2019-03-11
申请人： Spark Connected LLC
摘要： In an embodiment, a sub-surface wireless charger includes a transmitter coil and a controller. The controller is configured to generate a protective pulse having a first energy, determine a characteristic of the transmitter coil based on the generated protective pulse, determine whether it is safe to begin wireless charging based on the determined characteristic, and when the controller determines that it is safe to begin wireless charging, generate an operating pulse having a second energy, where the second energy is higher than the first energy.
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公开(公告)号：US20210399581A1
公开(公告)日：2021-12-23
申请号：US16904108
申请日：2020-06-17
申请人： Spark Connected LLC
摘要： A method for wirelessly providing power to a LED includes: receiving an AC input voltage having a first frequency via a cable; generating a first rectified voltage at a first node from the AC input voltage, the first node coupled to a first filtering non-electrolytic capacitor; powering a driver with the first rectified voltage; wirelessly transmitting power by driving a first resonant tank with the driver with a driving voltage at a second frequency higher than the first frequency, the driving voltage having a sinusoidal envelope at the first frequency and approximating a square-wave at the second frequency; receiving the wirelessly transmitted power with a second resonant tank; generating a second rectified voltage at second node from a voltage across the second resonant tank, the second node coupled to a second filtering capacitor; generating a DC voltage from the second rectified voltage; and powering the LED with the DC voltage.
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