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公开(公告)号：US20230216348A1
公开(公告)日：2023-07-06
申请号：US18115670
申请日：2023-02-28
申请人： Hengchun Mao , Ted Tianqi Mao , Xuezhong Jia
发明人： Hengchun Mao , Ted Tianqi Mao , Xuezhong Jia
摘要： An apparatus comprises a switch-capacitor network, a power-switch network and a controller. The switch-capacitor network has a plurality of control switches and a plurality of flying capacitors, where the control switches are configured to connect two of the flying capacitors in series in a first configuration and in parallel in a second configuration. The power-switch network has a plurality of power switches and is coupled between an input port having an input voltage and an output port having an output voltage, where the power switches are configured to couple the switch-capacitor network to the input port and the output port in different ways during a charging phase and a discharging phase. The controller is configured to operate the control switches to configure the switch-capacitor network into different configurations during the charging phase or the discharging phase such that a ratio of the output voltage over the input voltage is changed in an operation mode.
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公开(公告)号：US20210194290A1
公开(公告)日：2021-06-24
申请号：US17194302
申请日：2021-03-07
申请人： Hengchun Mao , Xuezhong Jia
发明人： Hengchun Mao , Xuezhong Jia
IPC分类号： H02J50/12 , H01F38/14 , H01F27/38 , H02J7/00 , H02M3/337 , B60L53/12 , H01F3/14 , H01F27/24 , H01F27/36
摘要： A device comprises a plurality of power converters, a resonator block and a connection block. The plurality of power converters is coupled to a power port having a voltage. Each power converter comprises a plurality of switch networks, and each switch network has a plurality of power switches. The resonator block comprises a plurality of resonators. Each resonator has a resonant capacitor and is coupled to one of the plurality of power converters. The connection block comprises a switching component and is coupled to one of the plurality of resonators, and the connection block and the said resonator are configured such that the device operates in a wireless charging mode with the resonator block activated or a wired charging mode with the connection block activated.
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公开(公告)号：US10985614B2
公开(公告)日：2021-04-20
申请号：US16131469
申请日：2018-09-14
申请人： Hengchun Mao , Xuezhong Jia
发明人： Hengchun Mao , Xuezhong Jia
IPC分类号： H02J50/12 , H01F38/14 , H02J7/02 , H01F27/38 , H02J7/00 , H02M3/337 , B60L53/12 , H01F3/14 , H01F27/24 , H01F27/36 , H02M7/06 , H02M7/5387 , H02M1/00
摘要： A device has a plurality of coils arranged along a perimeter within the device, where each coil has a winding configured to be coupled to a power converter through a resonant capacitor, and forms a resonator with the resonant capacitor. The device has also a connection core which is magnetically coupled to the plurality of coils. Furthermore, the device has a plurality of power converters, where each power converter is coupled to one of the plurality of coils, and is configured such that a current flowing through the winding of the coil has the same frequency as other winding currents in the device, and the phase angle of the current is approximately equal to the space angle of the coil, so a rotating magnetic field is formed in a space around the device.
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公开(公告)号：US20190140639A1
公开(公告)日：2019-05-09
申请号：US16239812
申请日：2019-01-04
申请人： Hengchun Mao , Xuezhong Jia
发明人： Hengchun Mao , Xuezhong Jia
摘要： A system includes an input port having an input voltage, an output port having an output voltage, and a power converter having a switch network with a plurality of power switches and a first resonant tank having a first resonant capacitor and a first resonant inductor, where at least one resonant component within the first resonant capacitor and the first resonant inductor is a switchable component configured to switch between different values. The system further includes a resonant mode selection block configured to adjust a value of the switchable component to maintain a performance of the system, and a controller configured to adjust a switching frequency or a duty cycle of the power converter.
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公开(公告)号：US10270439B2
公开(公告)日：2019-04-23
申请号：US15095021
申请日：2016-04-09
申请人： Hengchun Mao , Xuezhong Jia
发明人： Hengchun Mao , Xuezhong Jia
IPC分类号： H03K17/68 , H03K17/687 , H03K5/08 , H03F1/02 , H03F1/32 , H02M3/335 , H03F1/56 , H03F3/195 , H03F3/24 , H02M1/00
摘要： A device to drive a plurality of power switches in a power converter with an input voltage port having an input voltage includes a drive resonant tank, a switch network, a control block configured to control the turn-on and turn-off of drive switches, and an output port. The drive resonant tank has a resonant inductor, and a resonant capacitor which includes an input capacitance of a power switch. The switch network has a plurality of drive switches, which are controlled such that the drive resonant tank goes through a resonant state and a pseudo clamp state consecutively during a switching period. A gate drive voltage of a power switch fluctuates slightly during the pseudo clamp state. The output port has two terminals coupled to a gate and a source of a power switch respectively.
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公开(公告)号：US09800193B2
公开(公告)日：2017-10-24
申请号：US15095024
申请日：2016-04-09
申请人： Hengchun Mao , Xuezhong Jia
发明人： Hengchun Mao , Xuezhong Jia
CPC分类号： H02P25/20 , H02K3/28 , H02P25/18 , H02P25/188 , H02P25/22
摘要： A device comprises a motor/generator having an air gap and a plurality of windings, a plurality of power converter groups, and a control system. The windings are so configured that the number of phases in a pair of poles and the number of poles of the motor/generator can be dynamically adjusted. The power converter group comprises a plurality of power converters which is coupled between an input voltage source and a plurality of windings for controlling currents in the windings. The control system is so configured such that the number of poles of the motor/generator and the number of phases in a pair of poles are dynamically adjusted, and a synchronous speed of a moving magnetic field generated by winding currents within first pair of poles is approximately equal to a synchronous speed of a second moving magnetic field generated by currents in the windings within second pair of poles.
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公开(公告)号：US20190089197A1
公开(公告)日：2019-03-21
申请号：US16131469
申请日：2018-09-14
申请人： Hengchun Mao , Xuezhong Jia
发明人： Hengchun Mao , Xuezhong Jia
摘要： A device has a plurality of coils arranged along a perimeter within the device, where each coil has a winding configured to be coupled to a power converter through a resonant capacitor, and forms a resonator with the resonant capacitor. The device has also a connection core which is magnetically coupled to the plurality of coils. Furthermore, the device has a plurality of power converters, where each power converter is coupled to one of the plurality of coils, and is configured such that a current flowing through the winding of the coil has the same frequency as other winding currents in the device, and the phase angle of the current is approximately equal to the space angle of the coil, so a rotating magnetic field is formed in a space around the device.
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公开(公告)号：US11631998B2
公开(公告)日：2023-04-18
申请号：US16735032
申请日：2020-01-06
申请人： Hengchun Mao , Ted Tianqi Mao , Xuezhong Jia
发明人： Hengchun Mao , Ted Tianqi Mao , Xuezhong Jia
摘要： A system includes a first device, a second device, and a power control block. The first device has a first power converter and a first resonator which has a first resonant capacitor and a first coil. The second device has a second power converter and a second resonator which has a second resonant capacitor and a second coil. The second power converter is coupled to a ratio-controllable power converter, and the first coil and the second coil are magnetically coupled. The power control block is configured to adjust the system frequency, the second power converter output voltage and the current in the first coil in coordination.
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公开(公告)号：US11495998B2
公开(公告)日：2022-11-08
申请号：US17194302
申请日：2021-03-07
申请人： Hengchun Mao , Xuezhong Jia
发明人： Hengchun Mao , Xuezhong Jia
IPC分类号： H02J50/12 , H01F38/14 , H01F27/38 , H02J7/00 , H02M3/337 , B60L53/12 , H01F3/14 , H01F27/24 , H01F27/36 , H02J7/02 , H02M7/06 , H02M7/5387 , H02M1/00
摘要： A device comprises a plurality of power converters, a resonator block and a connection block. The plurality of power converters is coupled to a power port having a voltage. Each power converter comprises a plurality of switch networks, and each switch network has a plurality of power switches. The resonator block comprises a plurality of resonators. Each resonator has a resonant capacitor and is coupled to one of the plurality of power converters. The connection block comprises a switching component and is coupled to one of the plurality of resonators, and the connection block and the said resonator are configured such that the device operates in a wireless charging mode with the resonator block activated or a wired charging mode with the connection block activated.
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公开(公告)号：US20200227946A1
公开(公告)日：2020-07-16
申请号：US16735032
申请日：2020-01-06
申请人： Hengchun Mao , Ted Tianqi Mao , Xuezhong Jia
发明人： Hengchun Mao , Ted Tianqi Mao , Xuezhong Jia
摘要： A system includes a first device, a second device, and a power control block. The first device has a first power converter and a first resonator which has a first resonant capacitor and a first coil. The second device has a second power converter and a second resonator which has a second resonant capacitor and a second coil. The second power converter is coupled to a ratio-controllable power converter, and the first coil and the second coil are magnetically coupled. The power control block is configured to adjust the system frequency, the second power converter output voltage and the current in the first coil in coordination.
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