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    • 5. 发明申请
    • POWER CONVERTER WITH PREDICTIVE PULSE WIDTH MODULATOR
    • 具有预测脉宽调制器的电力转换器
    • WO2018078511A2
    • 2018-05-03
    • PCT/IB2017/056574
    • 2017-10-23
    • SILANNA ASIA PTE LTD
    • NEWLIN, Trevor M
    • H02M1/08H02M3/155H03K17/082
    • H02M3/158H03K7/08
    • Various methods and devices that involve control circuits for power converters are disclosed. One method comprises controlling a switch using a control signal based on a comparison signal. The switch controls a transfer of power between an input node, which receives an input, and an output node. The method comprises measuring an output of the power converter, generating an error signal based on the output, generating a periodic ramp signal with a varying period, providing the error signal to a first input terminal of a comparator, providing the ramp signal to a second input terminal of the comparator, and generating the comparison signal based on the error signal and the ramp signal using the comparator. The method comprises increasing a slope of the ramp signal in response to an increase in the input, and increasing the slope of the ramp signal in response to a decrease in the varying period.
    • 公开了涉及用于功率转换器的控制电路的各种方法和设备。 一种方法包括基于比较信号使用控制信号来控制开关。 该开关控制在接收输入的输入节点和输出节点之间的功率传输。 该方法包括测量功率转换器的输出,基于输出产生误差信号,产生具有变化周期的周期性斜坡信号,将误差信号提供给比较器的第一输入端子,将斜坡信号提供给第二 输入比较器的输入端,并且使用比较器基于误差信号和斜坡信号产生比较信号。 该方法包括响应于输入的增加而增加斜坡信号的斜率,并且响应于变化周期的减少而增加斜坡信号的斜率。
    • 7. 发明申请
    • SNUBBER CIRCUITS FOR POWER CONVERTERS
    • 用于电源转换器的SNUBBER电路
    • WO2018058607A1
    • 2018-04-05
    • PCT/CN2016/101270
    • 2016-09-30
    • ASTEC INTERNATIONAL LIMITED
    • SHENG, HuaYAO, JunZENG, Fanzheng
    • H02M1/00
    • H02M1/34H02M1/00H02M3/156H02M3/158H02M2001/342H03K17/08142H03K17/0822Y02B70/1491
    • A power converter for converting an input power at an input of the converter to an output power at an output of the converter includes a power conversion circuit and a snubber circuit coupled to the power conversion circuit. The power conversion circuit includes a switching device coupled to a reference potential, and an inductance coupled to the switching device. The snubber circuit includes a snubber switching device, a capacitance coupled to the snubber switching device, and an auxiliary inductance coupled to the inductance of the power conversion circuit and the snubber switching device. The snubber switching device and the capacitance are coupled across the switching device of the power conversion circuit. The capacitance is adapted to store leakage energy output from the power conversion circuit and discharge at least a portion of the stored leakage energy via the snubber switching device. Other example power converters are also disclosed.
    • 用于将转换器的输入端处的输入功率转换成转换器的输出端处的输出功率的功率转换器包括功率转换电路和耦合到功率转换电路的缓冲电路。 功率转换电路包括耦合到参考电位的开关装置和耦合到开关装置的电感。 缓冲电路包括缓冲开关装置,耦合到缓冲开关装置的电容以及耦合到电力转换电路和缓冲开关装置的电感的辅助电感。 缓冲开关装置和电容耦合在功率转换电路的开关装置两端。 该电容适于存储从功率转换电路输出的泄漏能量,并经由缓冲开关装置释放至少一部分存储的泄漏能量。 其他示例电源转换器也被披露。
    • 9. 发明申请
    • VERY HIGH EFFICIENCY SOFT SWITCHING CONVERTER AKA THE ADJUD CONVERTER
    • 非常高效的软开关转换器也是ADJUD转换器
    • WO2017223038A1
    • 2017-12-28
    • PCT/US2017/038252
    • 2017-06-20
    • JITARU, Ionel
    • JITARU, Ionel
    • H02M3/06
    • H02M3/33592H02M1/083H02M3/158H02M3/1582H02M3/33546H02M3/33584H02M3/337H02M2001/0058H02M2001/007H02M2001/008Y02B70/1475Y02B70/1491
    • A soft switching half bridge switching cell. Further this soft switching half bridge cell contains at least two synchronous rectifiers in the secondary which are conducting together during the dead time of the primary switchers creating a short circuit across the secondary windings, trapping the magnetizing current and release the magnetizing current to discharge the parasitic capacitances across the primary switchers when the synchronous rectifiers turn off the secondary windings are connected to a synchronized and controlled current source. The current demanded by the current source is shaped in such way that the current becomes zero before the synchronized rectifiers turn off and create zero voltage switching conditions for the primary switchers and further charge in a monotonic way the parasitic capacitances of the secondary synchronous rectifiers without ringing and spikes.
    • 软开关半桥开关单元。 此外,该软开关半桥单元包含次级中的至少两个同步整流器,其在主开关的停滞时间期间一起导通,从而在次级绕组上产生短路,俘获磁化电流并释放磁化电流以释放寄生 当同步整流器关断次级绕组时,跨主开关的电容连接到同步且受控的电流源。 电流源所要求的电流的形成方式使得在同步整流器关断之前电流变为零,并且为主开关装置产生零电压开关条件并且以单调方式进一步充电次级同步整流装置的寄生电容而没有振铃 和尖峰。

    • 10. 发明申请
    • HYBRID CONVERTER WITH REDUCED INDUCTOR LOSS
    • 具有降低电感损耗的混合型转换器
    • WO2017210340A1
    • 2017-12-07
    • PCT/US2017/035282
    • 2017-05-31
    • THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE
    • SEO, GabsuLE, Hanh-Phuc
    • H02M3/06H02M3/07H02M3/18H02M3/335
    • H02M3/07H02M3/158
    • A hybrid converter achieves high efficiency with an inductor positioned at the lower current path that significantly decreases inductor loss by having the DC component of inductor current reduced. The circuit also features reduced inductance requirement by reducing the voltage swing blocked by the inductor. As a result, it turns to benefit of both efficiency improvement and better integration. Less voltage stress for switches is also an important advantage to switching loss reduction and switching frequency increase which in turns enables passive component size reduction. The circuit in this invention can be realized for both step-down and step-up power conversion as well as bidirectional power flow is available. For simplicity and cost, some of switches can be replaced with passive switches such as diodes which highly simplifies the converter circuit implementation.
    • 通过使电感器位于较低的电流路径上,混合型转换器实现了高效率,其通过使电感器电流的DC分量降低而显着降低电感器损耗。 该电路还通过降低电感阻塞的电压摆幅来降低电感要求。 因此,它既有利于提高效率,又能提高集成度。 开关电压应力较小也是开关损耗降低和开关频率增加的一个重要优势,从而可以减小无源元件尺寸。 本发明中的电路可以实现降压和升压功率转换以及双向功率流。 为了简化和降低成本,一些开关可以用诸如二极管的无源开关来替代,这极大地简化了转换器电路的实现。