Wireless power transmission system and power transmitting device

    公开(公告)号:US09692238B2

    公开(公告)日:2017-06-27

    申请号:US14609530

    申请日:2015-01-30

    Abstract: A power transmitting device includes a power transmitting circuit that converts second DC power input from a DC power supply to AC power, a power transmitting antenna and a control circuit that receives a voltage value of the first DC power from the power receiving device. The control circuit changes a frequency of the AC power that is transmitted to the power receiving antenna, detects, from the received voltage values, a first frequency corresponding to a local minimum value of the voltage values and a second frequency corresponding to the voltage value that takes a local maximum value at a frequency higher than the first frequency, and sets the frequency of the AC power transmitted to the power receiving antenna to a frequency between the first frequency and the second frequency.

    Wireless power transmission system and power transmission device

    公开(公告)号:US09991748B2

    公开(公告)日:2018-06-05

    申请号:US14935502

    申请日:2015-11-09

    Abstract: A power transmission device includes: an oscillator including first through fourth switching devices, and converting DC power into AC power by pulses supplied thereto; a power transmission antenna delivering the AC power to a load of a power receiving device; memory holding a predetermined value indicating at least one of required voltage, current, and power; a receiving circuit receiving information of at least one of voltage, current, and power, supplied to the load; and a control circuitry changing a phase difference Δθ between pulses supplied to the first and fourth switching devices, and between pulses supplied to the second and third switching devices, thereby changing voltage of the AC power, deciding frequency of AC power where efficiency is greatest, converging the at least one of voltage, current, and power, of which information has been received, to the predetermined value range, and outputting AC power where the efficiency is the greatest.

    AC converter for converting a single-phase input AC voltage into a three-phase output AC voltage
    5.
    发明授权
    AC converter for converting a single-phase input AC voltage into a three-phase output AC voltage 有权
    AC转换器,用于将单相输入交流电压转换为三相输出交流电压

    公开(公告)号:US09190925B2

    公开(公告)日:2015-11-17

    申请号:US14008709

    申请日:2012-11-15

    CPC classification number: H02M5/458 H02M5/297 H02M7/4826

    Abstract: The AC converter converts a single-phase input AC voltage with a frequency f0 into a three-phase output AC voltage with a frequency f1 that is lower than f0. The AC converter includes a switching section with multiple switching elements and a switching control section that controls the conduction states of the respective switching elements. The switching control section supplies pulses that have been subjected to a pulse density modulation based on space vector modulation to the switching section, thereby getting the conversion into a three-phase output AC voltage done.

    Abstract translation: AC转换器将具有频率f0的单相输入交流电压转换为频率f1低于f0的三相输出交流电压。 AC转换器包括具有多个开关元件的开关部分和控制各个开关元件的导通状态的开关控制部分。 切换控制部分将经过基于空间矢量调制的脉冲密度调制的脉冲提供给切换部分,从而将转换转换成三相输出AC电压。

    AC CONVERSION CIRCUIT
    6.
    发明申请
    AC CONVERSION CIRCUIT 有权
    交流转换电路

    公开(公告)号:US20140056038A1

    公开(公告)日:2014-02-27

    申请号:US14008709

    申请日:2012-11-15

    CPC classification number: H02M5/458 H02M5/297 H02M7/4826

    Abstract: The AC converter converts a single-phase input AC voltage with a frequency f0 into a three-phase output AC voltage with a frequency f1 that is lower than f0. The AC converter includes a switching section 101 with multiple switching elements and a switching control section 103 that controls the conduction states of the respective switching elements. The switching control section 103 supplies pulses that have been subjected to a pulse density modulation based on space vector modulation to the switching section 101, thereby getting the conversion into a three-phase output AC voltage done.

    Abstract translation: AC转换器将具有频率f0的单相输入交流电压转换为频率f1低于f0的三相输出交流电压。 AC转换器包括具有多个开关元件的开关部分101和控制各个开关元件的导通状态的开关控制部分103。 切换控制部分103将已经经过基于空间矢量调制的脉冲密度调制的脉冲提供给切换部分101,从而将转换转换成完成的三相输出AC电压。

    Wireless power transmission system and power transmitter
    9.
    发明授权
    Wireless power transmission system and power transmitter 有权
    无线电力传输系统和电力变送器

    公开(公告)号:US09077261B2

    公开(公告)日:2015-07-07

    申请号:US13736370

    申请日:2013-01-08

    Inventor: Hiroshi Yamamoto

    CPC classification number: H02M7/42 H02J5/005 H02J50/12 H02J50/20 H02J50/40

    Abstract: A wireless power transmission system includes: a power transmitting section that converts DC energy input from a DC energy source into AC energy of a frequency f0; a transmitting antenna; and a receiving antenna. The power transmitting section includes: a class-E oscillator circuit including a switching element and a capacitor which are connected in parallel to the DC energy source, for converting the DC energy into the AC energy; and a switching control section that inputs a control signal for controlling a conduction state of the switching element to the switching element. The switching control section switches the switching element from a non-conductive state to a conductive state when a preset time period has elapsed or when a potential difference across the switching element takes a local minimum value after the switching element is switched from the conductive state to the non-conductive state.

    Abstract translation: 无线电力传输系统包括:功率发送部,其将从DC能量源输入的DC能量转换为频率f0的AC能量; 发射天线; 和接收天线。 电力传输部分包括:包括开关元件和电容器的E类振荡器电路,其与DC能源并联连接,用于将DC能量转换成AC能量; 以及切换控制部,其将用于控制所述开关元件的导通状态的控制信号输入到所述开关元件。 开关控制部分在经过预设时间段时或当开关元件从导通状态切换到开关元件之后的电位差为局部最小值时,将开关元件从非导通状态切换到导通状态 非导电状态。

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