公开(公告)号：US11807115B2

公开(公告)日：2023-11-07

申请号：US17150437

申请日：2021-01-15

Applicant: WiTricity Corporation

Inventor： Andre B. Kurs ,  Milisav Danilovic

IPC: B60L53/12 ,  H03H7/40 ,  H02J50/12 ,  H03H11/28 ,  H03K5/1536 ,  H03K7/08 ,  H03K17/284

CPC classification number: B60L53/12 ,  H02J50/12 ,  H03H7/40 ,  H03H11/28 ,  H03K5/1536 ,  H03K7/08 ,  H03K17/284

Abstract: Methods, systems, and devices for controlling a variable capacitor. One aspect features a variable capacitance device that includes a capacitor, a first transistor, a second transistor, and control circuitry. The control circuitry is configured to adjust an effective capacitance of the capacitor by performing operations including detecting a zero-crossing of an input current at a first time. Switching off the first transistor. Estimating a first delay period for switching the first transistor on when a voltage across the capacitor is zero. Switching on the first transistor after the first delay period from the first time. Detecting a zero-crossing of the input current at a second time. Switching off the second transistor. Estimating a second delay period for switching the second transistor on when a voltage across the capacitor is zero. Switching on the second transistor after the second delay period from the second time.

公开(公告)号：US20220123596A1

公开(公告)日：2022-04-21

申请号：US17462367

申请日：2021-08-31

Applicant: WiTricity Corporation

Inventor： Andre B. Kurs ,  Andrew J. Campanella ,  Aristeidis Karalis ,  Katherine L. Hall ,  Morris P. Kesler

IPC: H02J50/12 ,  G06F1/16 ,  H02J50/70 ,  H02J50/60 ,  H02J50/50 ,  H02J50/40 ,  H02J50/80 ,  B60L53/38 ,  B60L53/122 ,  B60L53/124 ,  B60L53/126 ,  B60L53/12 ,  H04L9/32 ,  H04N5/64 ,  H02J50/90 ,  H01F38/14 ,  H04B5/00

Abstract: A wireless power system for powering a television includes a source resonator, configured to generate an oscillating magnetic field, and at least one television component attached to at least one device resonator, wherein the at least one device resonator is configured to wirelessly receive power from the source resonator via the oscillating magnetic field when the distance between the source resonator and the at least one device resonator is more than 5 cm, and wherein at least one television component draws at least 10 Watts of power.

公开(公告)号：US10211681B2

公开(公告)日：2019-02-19

申请号：US15287971

申请日：2016-10-07

Applicant: WiTricity Corporation

Inventor： Arunanshu Mohan Roy ,  Noam Katz ,  Andre B. Kurs ,  Christopher Buenrostro ,  Simon Verghese ,  Morris P. Kesler ,  Katherine L. Hall ,  Herbert Toby Lou

IPC: H02J50/60 ,  G01R29/08 ,  H02J50/50 ,  H01F38/14 ,  H02J5/00 ,  G01V3/08 ,  H02J7/02 ,  B60L11/18 ,  H02J50/12 ,  G01V3/10 ,  G01V3/12

Abstract: The disclosure features apparatus, methods, and systems for wireless power transfer that include a power source featuring at least one resonator, a power receiver featuring at least one resonator, a first detector featuring one or more loops of conductive material and configured to generate an electrical signal based on a magnetic field between the power source and the power receiver, a second detector featuring conductive material, and control electronics coupled to the first and second detectors, where during operation, the control electronics are configured to measure the electrical signal of the first detector and compare the measured electrical signal of the first detector to baseline electrical information for the first detector to determine information about whether debris is positioned between the power source and the power receiver.

公开(公告)号：US10186373B2

公开(公告)日：2019-01-22

申请号：US15885884

申请日：2018-02-01

Applicant: WiTricity Corporation

Inventor： Andre B. Kurs

IPC: H01F27/42 ,  H01F38/14 ,  H02J50/50 ,  H02J50/12 ,  H02J50/80 ,  H02J50/70 ,  H02J5/00 ,  H04B5/00 ,  H01F27/28 ,  H02J7/02 ,  H01F27/36

Abstract: In a first aspect, the disclosure features apparatuses for wireless power transfer, the apparatuses including a plurality of magnetic elements joined together to form a magnetic component extending in a plane, where discontinuities in the magnetic component between adjacent magnetic elements define gaps in the magnetic component, a coil including one or more loops of conductive material positioned, at least in part, on a first side of the plane. The apparatuses include a conductive shield positioned on a second side of the plane and which includes one or more openings positioned relative to the gaps.

公开(公告)号：US20180323654A1

公开(公告)日：2018-11-08

申请号：US16038569

申请日：2018-07-18

Applicant: WiTricity Corporation

Inventor： Andre B. Kurs ,  Milisav Danilovic

IPC: H02J50/12 ,  H03H7/40 ,  H03K17/284 ,  H03K7/08 ,  H03H11/28 ,  B60L11/18 ,  H03K5/1536

CPC classification number: H02J50/12 ,  B60L11/182 ,  H03H7/40 ,  H03H11/28 ,  H03K5/1536 ,  H03K7/08 ,  H03K17/284

Abstract: Methods, systems, and devices for controlling a variable capacitor. One aspect features a variable capacitance device that includes a capacitor, a first transistor, a second transistor, and control circuitry. The control circuitry is configured to adjust an effective capacitance of the capacitor by performing operations including detecting a zero-crossing of an input current at a first time. Switching off the first transistor. Estimating a first delay period for switching the first transistor on when a voltage across the capacitor is zero. Switching on the first transistor after the first delay period from the first time. Detecting a zero-crossing of the input current at a second time. Switching off the second transistor. Estimating a second delay period for switching the second transistor on when a voltage across the capacitor is zero. Switching on the second transistor after the second delay period from the second time.

公开(公告)号：US10084348B2

公开(公告)日：2018-09-25

申请号：US15338774

申请日：2016-10-31

Applicant: WiTricity Corporation

Inventor： Morris P. Kesler ,  Katherine L. Hall ,  Andre B. Kurs ,  Aristeidis Karalis ,  Marin Soljacic ,  Andrew J. Campanella ,  David A. Schatz

IPC: H02J7/00 ,  H02J50/12 ,  H02J50/70 ,  H02J50/50 ,  H02J5/00 ,  H02J7/02 ,  H02J17/00 ,  H03H7/40 ,  H04B5/00 ,  H01F38/14 ,  A61M1/12 ,  A61N1/39 ,  H01F3/00

CPC classification number: H02J50/12 ,  A61M1/127 ,  A61M2205/8243 ,  A61N1/3975 ,  B60L2200/26 ,  H01F38/14 ,  H01F2003/005 ,  H02J5/005 ,  H02J7/025 ,  H02J17/00 ,  H02J50/50 ,  H02J50/70 ,  H03H7/40 ,  H04B5/0037 ,  H04B5/0093

Abstract: Wireless energy transfer apparatus include, in at least one aspect, a device resonator configured to supply power for a load by receiving wirelessly transferred power from a source resonator; a temperature sensor positioned to measure a temperature of a component of the apparatus; a tunable component coupled to the device resonator to adjust a resonant frequency of the device resonator, an effective impedance the device resonator, or both; and control circuitry configured to, in response to detecting a temperature condition using the temperature sensor, (i) tune the tunable component to adjust the resonant frequency of the device resonator, the effective impedance of the device resonator, or both, and (ii) signal the source resonator regarding the temperature condition to cause an adjustment of a resonant frequency of the source resonator, a power output of the source resonator, or both.

公开(公告)号：US10063104B2

公开(公告)日：2018-08-28

申请号：US15427186

申请日：2017-02-08

Applicant: WiTricity Corporation

Inventor： Andre B. Kurs ,  Milisav Danilovic

IPC: H02J50/12 ,  B60L11/18 ,  H03H11/28 ,  H03K5/1536 ,  H03K7/08 ,  H03K17/284 ,  H03H7/40

CPC classification number: H02J50/12 ,  B60L53/12 ,  H03H7/40 ,  H03H11/28 ,  H03K5/1536 ,  H03K7/08 ,  H03K17/284

Abstract: Methods, systems, and devices for controlling a variable capacitor. One aspect features a variable capacitance device that includes a capacitor, a first transistor, a second transistor, and control circuitry. The control circuitry is configured to adjust an effective capacitance of the capacitor by performing operations including detecting a zero-crossing of an input current at a first time. Switching off the first transistor. Estimating a first delay period for switching the first transistor on when a voltage across the capacitor is zero. Switching on the first transistor after the first delay period from the first time. Detecting a zero-crossing of the input current at a second time. Switching off the second transistor. Estimating a second delay period for switching the second transistor on when a voltage across the capacitor is zero. Switching on the second transistor after the second delay period from the second time.

公开(公告)号：US20180241221A1

公开(公告)日：2018-08-23

申请号：US15956797

申请日：2018-04-19

Applicant: WiTricity Corporation

Inventor： Alexander P. McCauley ,  Arunanshu M. Roy ,  Noam Katz ,  Andre B. Kurs ,  Morris P. Kesler

IPC: H02J5/00 ,  H04B5/00 ,  H02J7/02 ,  H02J50/90 ,  H02J50/70 ,  H02J50/40 ,  H02J50/12 ,  H01F38/14

CPC classification number: H02J5/005 ,  H01F38/14 ,  H02J7/025 ,  H02J50/12 ,  H02J50/40 ,  H02J50/70 ,  H02J50/90 ,  H04B5/0037 ,  H04B5/0087

Abstract: The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when a device resonator is not positioned on or near any of the at least two source resonators, the nominal impedances of each of the at least two source resonators varying by 10% or less from one another; and the at least two source resonators are configured so that during operation of the wireless energy transfer source, when a device resonator is positioned on or near a first one of the at least two source resonators: (a) the impedance of the first source resonator is reduced to a value smaller than the nominal impedances of each of the other resonators by a factor of 2 or more.

公开(公告)号：US20180158601A1

公开(公告)日：2018-06-07

申请号：US15885884

申请日：2018-02-01

Applicant: WiTricity Corporation

Inventor： Andre B. Kurs

IPC: H01F38/14 ,  H04B5/00 ,  H02J50/50 ,  H02J50/70 ,  H02J50/80 ,  H02J7/02 ,  H01F27/28 ,  H01F27/36 ,  H02J5/00 ,  H02J50/12

CPC classification number: H01F38/14 ,  H01F27/2871 ,  H01F27/365 ,  H02J5/005 ,  H02J7/025 ,  H02J50/12 ,  H02J50/50 ,  H02J50/70 ,  H02J50/80 ,  H04B5/0037 ,  H04B5/0075

Abstract: In a first aspect, the disclosure features apparatuses for wireless power transfer, the apparatuses including a plurality of magnetic elements joined together to form a magnetic component extending in a plane, where discontinuities in the magnetic component between adjacent magnetic elements define gaps in the magnetic component, a coil including one or more loops of conductive material positioned, at least in part, on a first side of the plane. The apparatuses include a conductive shield positioned on a second side of the plane and which includes one or more openings positioned relative to the gaps.

公开(公告)号：US09842688B2

公开(公告)日：2017-12-12

申请号：US14794714

申请日：2015-07-08

Applicant: WiTricity Corporation

Inventor： Andre B. Kurs ,  Guillaume Lestoquoy ,  Morris P. Kesler

IPC: H01F5/00 ,  H01F38/14 ,  H01F27/00 ,  H01F27/28 ,  H02J5/00 ,  B60L11/18 ,  H02J50/12

CPC classification number: H01F38/14 ,  B60L11/182 ,  B60L2210/10 ,  B60L2210/30 ,  B60L2210/40 ,  B60L2270/147 ,  H01F5/00 ,  H01F27/00 ,  H01F27/28 ,  H01F27/2823 ,  H01F27/2871 ,  H01F2005/006 ,  H02J5/005 ,  H02J7/025 ,  H02J50/12 ,  H02J50/40 ,  H02J50/70 ,  H02J50/80 ,  Y02T10/7005 ,  Y02T10/7072 ,  Y02T10/7216 ,  Y02T10/7241 ,  Y02T90/122 ,  Y02T90/127 ,  Y02T90/14

Abstract: The disclosure features systems for wireless power transfer that include a resonator featuring a coil with at least two windings and at least one inductor having an inductance value, where the at least one inductor is connected in series to at least one of the windings, and where the inductance value is selected so that when the coil carries a current during operation of the system, the at least one inductor maintains a distribution of current flows among the at least two windings such that for each of the at least two windings, an actual current flow in the winding differs from a target current flow for the winding by 10% or less.