公开(公告)号：US09837864B2

公开(公告)日：2017-12-05

申请号：US14670371

申请日：2015-03-26

Applicant: Integrated Device Technology, Inc.

Inventor： Gustavo J. Mehas ,  Nicholaus W. Smith ,  Adam M. Bumgarner

IPC: H01F27/42 ,  H01F37/00 ,  H01F38/00 ,  H02J50/12 ,  H02J7/02

CPC classification number: H02J50/12 ,  H02J7/025

Abstract: A wireless power transmitter may include a bridge inverter and a plurality of parallel paths operably coupled to the bridge inverter. Each path includes a resonance tank including a transmit coil coupled with at least one resonance capacitor, a first switch serially coupled with the resonance tank and switching node A of the bridge inverter, a first clamping element in parallel with the first switch, a second switch serially coupled with the resonance tank and switching node B of the bridge inverter, and a second clamping element in parallel with the second switch. A method includes generating a wireless power signal through a used coil in a first parallel path, and clamping a parasitic voltage generated in at least one unused coil in at least one additional parallel path through a clamp element across a switch in the at least one parallel path for the at least one unused coil.

公开(公告)号：US20160285278A1

公开(公告)日：2016-09-29

申请号：US14670371

申请日：2015-03-26

Applicant: Integrated Device Technology, Inc.

Inventor： Gustavo J. Mehas ,  Nicholaus W. Smith ,  Adam M. Bumgarner

IPC: H02J5/00 ,  H02J7/02

CPC classification number: H02J50/12 ,  H02J7/025

Abstract: A wireless power transmitter may include a bridge inverter and a plurality of parallel paths operably coupled to the bridge inverter. Each path includes a resonance tank including a transmit coil coupled with at least one resonance capacitor, a first switch serially coupled with the resonance tank and switching node A of the bridge inverter, a first clamping element in parallel with the first switch, a second switch serially coupled with the resonance tank and switching node B of the bridge inverter, and a second clamping element in parallel with the second switch. A method includes generating a wireless power signal through a used coil in a first parallel path, and clamping a parasitic voltage generated in at least one unused coil in at least one additional parallel path through a clamp element across a switch in the at least one parallel path for the at least one unused coil.

Abstract translation: 无线电力发射机可以包括桥式逆变器和可操作地耦合到桥式逆变器的多个并行路径。 每个路径包括一个共振槽，包括与至少一个谐振电容耦合的发射线圈，与谐振槽串联耦合的第一开关和桥式逆变器的开关节点A，与第一开关并联的第一钳位元件，第二开关 与桥式逆变器的谐振槽和开关节点B串联耦合，以及与第二开关并联的第二钳位元件。 一种方法包括通过第一并行路径中使用的线圈产生无线功率信号，以及将至少一个未使用的线圈中产生的寄生电压钳位在穿过所述至少一个并联中的开关的夹紧元件的至少一个附加并行路径中 至少一个未使用的线圈的路径。