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公开(公告)号：US12100969B2
公开(公告)日：2024-09-24
申请号：US18204218
申请日：2023-05-31
IPC分类号： H02J50/12 , B60L53/122 , H02J50/80 , H02J50/90 , H02M1/08 , H02M1/42 , H02M7/5387
CPC分类号： H02J50/12 , B60L53/122 , H02M1/4208 , H02M7/53871 , H02J50/80 , H02J50/90 , H02M1/08
摘要： Disclosed herein are systems and methods for low power excitation of wireless power transmitters configured to transmit high power. The exemplary systems and methods include disabling a power factor correction circuit of the transmitter, and adjusting one or more variable impedance components of the impedance network to obtain a minimum attainable impedance. The variable impedance components can be configured to operate between the minimum attainable impedance and a maximum attainable impedance. The systems and methods can include adjusting a phase shift angle associated with one or more transistors of the inverter and driving the transmitter such that the transmitter resonator coil generates a magnetic flux density less than or equal to a field safety threshold.
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公开(公告)号：US20240234011A9
公开(公告)日：2024-07-11
申请号：US18457818
申请日：2023-08-29
发明人： Kylee Devro Sealy
CPC分类号： H01F27/2885 , H02J50/10 , H02J50/70
摘要： Techniques for a magnetic-shielding-and-enhancement winding are disclosed. The magnetic-shielding-and-enhancement winding is a winding of a multi-turn coil that is on a separate layer from other windings of the coil (e.g., on a general winding layer). The magnetic-shielding-and-enhancement winding provides magnetic shielding to reduce localized multiplicative effects of aggregate fields generated by the windings of the coil on the general winding layer and simultaneously acts as one or more turns of the winding structure to enhance the field in a desirable manner.
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公开(公告)号：US20240136945A1
公开(公告)日：2024-04-25
申请号：US18486835
申请日：2023-10-13
发明人： Milisav Danilovic , Oguz Atasoy , Nam Hoai Le , David Gellis
CPC分类号： H02M7/4835 , H02J50/12 , H02M1/0058 , H02M7/4837 , H02M7/487
摘要： Described herein are controllers configured for a wireless power system and methods for such controllers and systems. The controller includes a control module configured to generate a first control signal having a first voltage level and a second control signal having a second voltage level and a modulator configured to (a) receive a signal representative of the output current and (b) generate carrier signals based on the output current. When a first carrier signal is greater than the first voltage level, a first gate drive signal for a first switch is high and when a second carrier signal is greater than the second voltage level, a second gate drive signal for a second switch is high, thereby driving an inverter to output a multi-level voltage having a first output level based on the first drive signal and a second output level based on the second drive signal.
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公开(公告)号：USD1018474S1
公开(公告)日：2024-03-19
申请号：US29792297
申请日：2022-03-18
设计人： Jan Rolf Stillerman , Aldo A. D'Amico , Stephen Joseph Ganem , Alexander Gruzen , Geoff Allan Phillips Rodriguez , Andre Hugues de Salis , David Allen Schatz , Valeriy Zolotykh , Pamposh Zutshi
摘要： FIG. 1 is a top right perspective view of an electrical-box cover showing the design;
FIG. 2 is a top plan view of the electrical-box cover of FIG. 1;
FIG. 3 is a left side elevation view of the electrical-box cover of FIG. 1;
FIG. 4 is a right side elevation view of the electrical-box cover of FIG. 1;
FIG. 5 is a rear elevation view of the electrical-box cover of FIG. 1; and,
FIG. 6 is a front elevation view of the electrical-box cover of FIG. 1.
The broken lines shown in the figures represent unclaimed subject matter and form no part of the claimed design. The portion of the article that is not shown in the figures is not claimed. The claimed design includes no portion that would be shown in a bottom plan view, hence a bottom plan view is not included in the drawings. The relatively light and thin shade lines show contour and not surface decoration.-
公开(公告)号：US11909198B2
公开(公告)日：2024-02-20
申请号：US17161487
申请日：2021-01-28
发明人： Milisav Danilovic , Bryan Esteban
摘要： The disclosure features systems and methods for protecting transistors of a wireless power receiver. Systems can include a gate driver configured provide a control signal to control switching of the transistor gate such that power is transmitted to a load coupled to the receiver; and a controller coupled to the gate driver and configured to generate a protection signal. The protection signal can include (i) a fault signal indicating a fault in one or more components of the receiver; (ii) a signal indicating that the transistor gate should be latched; and/or (ii) at least one undervoltage signal indicating that an undervoltage condition exists in a power supply of the gate driver. Based on the generated protection signal, the gate driver can be configured to adjust the provided control signal to latch the transistor gate such that power is not transmitted to the load.
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公开(公告)号：US11888328B2
公开(公告)日：2024-01-30
申请号：US17991661
申请日：2022-11-21
发明人： Milisav Danilovic , Conor Rochford
摘要： Disclosed herein are methods and systems for controlling an active rectifier of a wireless power receiver. The exemplary methods can include determining a reference value of a current into the rectifier, the reference value being based on a load requirement; determining a required value change in a present input current into the rectifier based on the reference value; transmitting, to a wireless power transmitter, a signal representative of the required value change in the present input current; determining a new value of the present input current after transmitting the signal; and, when the new value is within a predetermined range of the required value change, driving at least one transistor in the rectifier with a PWM signal based on the new value.
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公开(公告)号：US11815644B2
公开(公告)日：2023-11-14
申请号：US18059280
申请日：2022-11-28
发明人： Hans Peter Widmer , Lukas Sieber
摘要： The present disclosure describes techniques for detecting foreign objects. In some aspects, an apparatus for detecting objects is provided. The apparatus includes a plurality of sense circuits, each of the plurality of sense circuits including a primary sense coil having a first terminal and a second terminal, a secondary sense coil having a first terminal and a second terminal, and a capacitor having a first terminal and a second terminal. The first terminal of the capacitor is electrically connected to the second terminals of each of the primary sense coil and the secondary sense coil. The apparatus further includes a driver circuit electrically connected to the first terminal of the primary sense coil of each of the plurality of sense circuits. The apparatus further includes a measurement circuit electrically connected to the first terminal of the secondary sense coil of each of the plurality of sense circuits.
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公开(公告)号：US20230361566A1
公开(公告)日：2023-11-09
申请号：US18352008
申请日：2023-07-13
摘要： Systems and methods are described for active harmonics cancellation. A wireless charging apparatus includes a wireless-power transfer circuit comprising a wireless-power transfer coil configured to generate or couple to a magnetic field to transfer or receive power and a plurality of tuning capacitors electrically coupled to the wireless-power transfer coil. The apparatus also includes a power converter circuit electrically coupled to the wireless-power transfer circuit. Additionally, the apparatus includes a signal generation circuit different from the power converter circuit and electrically coupled to one or more nodes between capacitors of the plurality of tuning capacitors. The signal generation circuit is configured to generate and inject a signal into the wireless-power transfer circuit at the nodes between the capacitors. The signal generation circuit includes a rejection filter tuned to an operating frequency of the wireless-power transfer coil.
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9.发明授权公开(公告)号：US11719847B2
公开(公告)日：2023-08-08
申请号：US17836841
申请日：2022-06-09
IPC分类号： B60L53/12 , G01V3/10 , B60L3/00 , B60L3/04 , B60L53/36 , B60L55/00 , B60L53/65 , B60L53/66 , B60L50/60 , B60L53/124 , B60L53/68 , B60L53/122 , B60L53/126 , B60L53/30 , H02J50/10 , H02J50/12 , H02J50/90 , H02J7/00
CPC分类号： G01V3/10 , B60L3/0069 , B60L3/04 , B60L50/66 , B60L53/12 , B60L53/122 , B60L53/124 , B60L53/126 , B60L53/30 , B60L53/305 , B60L53/36 , B60L53/65 , B60L53/665 , B60L53/68 , B60L55/00 , H02J7/00034 , H02J50/10 , H02J50/12 , H02J50/90 , B60L2200/12 , B60L2200/22 , B60L2200/26 , B60L2210/10 , B60L2210/30 , B60L2210/40 , B60L2240/36 , B60L2270/147 , Y02E60/00 , Y02T10/70 , Y02T10/7072 , Y02T10/72 , Y02T90/12 , Y02T90/14 , Y02T90/16 , Y02T90/167 , Y04S10/126 , Y04S30/14
摘要： An apparatus for detecting a presence of an object includes an inductive sensing coil that is configurable to generate a magnetic field. The inductive sensing coil is configured to have an electrical characteristic that is detectable when generating the magnetic field. The apparatus comprises a controller configured to detect a change in the electrical characteristic and determine a presence of the object based on the detected change in the electrical characteristic.
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公开(公告)号：US20230246488A1
公开(公告)日：2023-08-03
申请号：US18161396
申请日：2023-01-30
发明人： Hans Peter Widmer , Marcel Fischer , Ning Liu
摘要： A method for detecting a foreign metal object near an inductive wireless power transfer system is based on combined inductive sensing and thermal sensing. A sensing system senses the object based on an inductive or thermal effect. The sensing system includes a sense element which has an electrical characteristic that changes in a presence of the object based on the inductive effect. A mediating heat-sensitive material has a property that varies as a function of temperature and changes the electrical characteristic of the sense element as the property changes. The mediating heat-sensitive material is heated by the foreign object when the foreign object is heated by a magnetic field generated by the wireless power transfer system. A controller measures the electrical characteristic and determines a presence of the object based on the change in the measured electrical characteristics.
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