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17 条记录 (耗时 0.019 秒)

    Stacked switched capacitor energy buffer circuit
    1.
    发明授权
    Stacked switched capacitor energy buffer circuit 有权

    公开(公告)号：US10218289B2

    公开(公告)日：2019-02-26

    申请号：US14360992

    申请日：2013-01-17

    申请人： MASSACHUSETTS INSTITUTE OF TECHNOLOGY

    发明人： David J. Perreault ,  Khurram K. Afridi ,  Minjie Chen ,  Steven B. Leeb ,  Arthur Hsu Chen Chang

    IPC分类号： H02M3/06 ,  H02M7/537 ,  H01G4/38 ,  H02M7/217 ,  H01G4/30 ,  H02J5/00

    摘要： A stacked switched capacitor (SSC) energy buffer circuit includes a switching network and a plurality of energy storage capacitors. The switching network need operate at only a relatively low switching frequency and can take advantage of soft charging of the energy storage capacitors to reduce loss. Thus, efficiency of the SSC energy buffer circuit can be extremely high compared with the efficiency of other energy buffer circuits. Since circuits utilizing the SSC energy buffer architecture need not utilize electrolytic capacitors, circuits utilizing the SSC energy buffer architecture overcome limitations of energy buffers utilizing electrolytic capacitors. Circuits utilizing the SSC energy buffer architecture (without electrolytic capacitors) can achieve an effective energy density characteristic comparable to energy buffers utilizing electrolytic capacitors. The SSC energy buffer architecture exhibits losses that scale with the amount of energy buffered, such that a relatively high efficiency can be achieved across a desired operating range.

    Resonant Power Converters Using Impedance Control Networks And Related Techniques
    3.
    发明申请
    Resonant Power Converters Using Impedance Control Networks And Related Techniques 审中-公开
    使用阻抗控制网络和相关技术的谐振电源转换器

    公开(公告)号：US20150023063A1

    公开(公告)日：2015-01-22

    申请号：US14382765

    申请日：2013-03-07

    申请人： MASSACHUSETTS INSTITUTE OF TECHNOLOGY

    发明人： David J. Perreault ,  Khurram K. Afridi

    IPC分类号： H02M3/335

    CPC分类号： H02M3/33569 ,  H02M3/335 ,  H02M3/33507 ,  H02M3/33576 ,  H02M3/337 ,  H02M3/3376 ,  H02M2001/0003 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

    摘要： An impedance control resonant power converter (converter) operated at a fixed switching frequency includes an impedance control network (ICN) coupled between two or more inverters operated at a fixed duty ratio with a phase shift between them and one or more rectifiers. The phase shift is used to control output power or compensate for variations in input or output voltage. The converter operates at fixed frequency yet achieves simultaneous zero voltage switching (ZVS) and zero or near zero current switching (ZCS) across a wide operating range. Output power may be controlled by: (1) changing phase shift between inverters; or (2) adjusting phase shift between inverters depending upon input and/or output voltages so that an admittance presented to the inverters is conductive and then turning the converter on and off at a frequency lower than the converter switching frequency to control output power below a value set by the phase shift.

    摘要翻译： 以固定开关频率工作的阻抗控制谐振功率转换器（转换器）包括耦合在两个或多个以固定占空比工作的逆变器之间的阻抗控制网络（ICN），其间具有与一个或多个整流器之间的相移。 相移用于控制输出功率或补偿输入或输出电压的变化。 转换器以固定频率工作，在宽工作范围内实现了零电压切换（ZVS）和零或近零电流切换（ZCS）。 输出功率可以通过以下方式控制：（1）改变逆变器之间的相移; 或（2）根据输入和/或输出电压调整逆变器之间的相移，使得呈现给逆变器的导纳是导通的，然后以低于转换器开关频率的频率接通和关断转换器，以将输出功率控制在低于 值由相移设定。

    Stacked Switched Capacitor Energy Buffer Circuit
    4.
    发明申请
    Stacked Switched Capacitor Energy Buffer Circuit 审中-公开
    堆叠开关电容器能量缓冲电路

    公开(公告)号：US20140355322A1

    公开(公告)日：2014-12-04

    申请号：US14360992

    申请日：2013-01-17

    申请人： MASSACHUSETTS INSTITUTE OF TECHNOLOGY

    发明人： David J. Perreault ,  Khurram K. Afridi ,  Minjie Chen ,  Steven B. Leeb ,  Arthur Hsu Chen Chang

    IPC分类号： H02M7/537 ,  H01G4/30

    CPC分类号： H02M7/537 ,  H01G4/30 ,  H01G4/38 ,  H02J5/00 ,  H02M7/217 ,  Y02T10/7022

    摘要： A stacked switched capacitor (SSC) energy buffer circuit includes a switching network and a plurality of energy storage capacitors. The switching network need operate at only a relatively low switching frequency and can take advantage of soft charging of the energy storage capacitors to reduce loss. Thus, efficiency of the SSC energy buffer circuit can be extremely high compared with the efficiency of other energy buffer circuits. Since circuits utilizing the SSC energy buffer architecture need not utilize electrolytic capacitors, circuits utilizing the SSC energy buffer architecture overcome limitations of energy buffers utilizing electrolytic capacitors. Circuits utilizing the SSC energy buffer architecture (without electrolytic capacitors) can achieve an effective energy density characteristic comparable to energy buffers utilizing electrolytic capacitors. The SSC energy buffer architecture exhibits losses that scale with the amount of energy buffered, such that a relatively high efficiency can be achieved across a desired operating range.

    摘要翻译： 层叠开关电容器（SSC）能量缓冲电路包括开关网络和多个储能电容器。 开关网络只需要相对低的开关频率工作，并且可以利用储能电容器的软充电来减少损耗。 因此，与其他能量缓冲电路的效率相比，SSC能量缓冲电路的效率可以非常高。 由于使用SSC能量缓冲结构的电路不需要利用电解电容器，所以利用SSC能量缓冲架构的电路克服了利用电解电容器的能量缓冲器的局限性。 利用SSC能量缓冲架构（无电解电容器）的电路可实现与使用电解电容器的能量缓冲器相当的有效能量密度特性。 SSC能量缓冲结构表现出随着能量缓冲量的增加而降低的损耗，使得能够在期望的工作范围内实现相对较高的效率。

    Coupled Split Path Power Conversion Architecture
    9.
    发明申请
    Coupled Split Path Power Conversion Architecture 审中-公开

    公开(公告)号：US20190165573A9

    公开(公告)日：2019-05-30

    申请号：US15290402

    申请日：2016-10-11

    申请人： Massachusetts Institute of Technology

    发明人： David J. Perreault ,  Khurram K. Afridi ,  Minjie Chen

    IPC分类号： H02J1/00 ,  H02M3/335

    摘要： Described herein are power conversion systems and related techniques which utilize a coupled split path (CSP) circuit architecture. The CSP structure combines switches, capacitors and magnetic elements in such a way that power is processed in multiple coupled split paths in a variety of voltage domains. These techniques are well suited for power conversion applications that have one or more input/output ports that have a wide voltage range, or if the application is interfacing with the ac line voltage and requires power-factor correction.

    Systems and Methods for a Variable Frequency Multiplier Power Converter
    10.
    发明申请
    Systems and Methods for a Variable Frequency Multiplier Power Converter 有权
    变频乘法器功率转换器的系统和方法

    公开(公告)号：US20150295497A1

    公开(公告)日：2015-10-15

    申请号：US14435914

    申请日：2013-10-31

    申请人： MASSACHUSETTS INSTITUTE OF TECHNOLOGY

    发明人： David J. Perreault ,  Khurram K. Afridi ,  Samantha J. Gunter

    IPC分类号： H02M3/335 ,  H02M1/42

    CPC分类号： H02M3/33507 ,  H02M1/4241 ,  H02M1/44 ,  H02M3/33523 ,  H02M3/3376 ,  H02M2001/0048 ,  H02M2001/0054 ,  H02M2001/0058 ,  H02M2001/0074 ,  H02M2001/0077 ,  Y02B70/1491

    摘要： A power converter for converting DC power to DC power includes an inverter stage having two or more switched inverters configured to receive DC power from a source and produce a switched AC output power signal. A transformation stage is coupled to receive the switched output power signal from the inverter stage, shape the output power signal, and produce a shaped power signal. A rectifier stage having two or more switched inverters coupled to receive the shaped power signal and convert the shaped power signal to a DC output power signal is included. A controller circuit is coupled to operate the power converter in a variable frequency multiplier mode where at least one of the switched inverters is switched at a frequency or duty cycle that results in an output signal having a frequency that is a harmonic of the fundamental frequency being generated by the power converter.

    摘要翻译： 用于将直流电力转换为直流电力的电力转换器包括具有两个或更多个开关逆变器的逆变器级，其被配置为从源接收DC电力并产生开关式AC输出功率信号。 耦合转换级以接收来自逆变器级的开关输出功率信号，形成输出功率信号，并产生成形功率信号。 包括耦合以接收成形功率信号并将成形功率信号转换成DC输出功率信号的具有两个或更多个开关逆变器的整流器级。 控制器电路被耦合以以可变频率乘法器模式操作功率转换器，其中至少一个开关逆变器以频率或占空比来切换，其导致具有基频谐波的频率的输出信号为 由电源转换器产生。