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    Soft Transition on all Switching Elements Two Transistors Forward Converter
    3.
    发明申请
    Soft Transition on all Switching Elements Two Transistors Forward Converter 有权
    所有开关元件的软转换两个晶体管正向转换器

    公开(公告)号：US20160094137A1

    公开(公告)日：2016-03-31

    申请号：US14890088

    申请日：2014-05-12

    Applicant: ROMPOWER ENERGY SYSTEMS, INC.

    Inventor： Ionel Jitaru ,  Marco Antonio Davila

    IPC: H02M3/335

    CPC classification number: H02M3/33592 ,  H02M1/12 ,  H02M3/3353 ,  H02M3/33553 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491

    Abstract: A method is shown to improve any forward topology operation to achieve efficient resonant transitions by actively shorting the magnetizing inductance and release the short at another time thus producing lower switching losses independent of frequency. In another embodiment of this invention the current from the output inductor is allowed to go negative before the freewheeling synchronous rectifier is turned off, pushing the current back into the primary to create a soft transition across the switching elements before they are turned on. In another embodiment of the invention a current source is used to inject a negative current through the freewheeling synchronous rectifier before is turned off with the purpose of transferring the current into the primary to discharge the parasitic capacitances of the primary switchers before are turned on. An optimized control method can be utilized to tailor the frequency to create the necessary conditions requested by the embodiments of the invention.

    Abstract translation: 示出了一种方法来改进任何正向拓扑操作以通过主动地短路磁化电感并在另一时间释放短路来实现有效的谐振转换，从而产生与频率无关的更低的开关损耗。 在本发明的另一个实施例中，在续流同步整流器关闭之前允许来自输出电感器的电流为负，将电流推回到初级电压器，以在开关元件导通之前跨越开关元件产生软转换。 在本发明的另一个实施例中，电流源用于在断开之前通过续流同步整流器注入负电流，目的是在导通之前将电流传送到初级电池以放电主开关器件的寄生电容。 可以使用优化的控制方法来定制频率以创建由本发明的实施例请求的必要条件。

    Ideal switch bridgeless PFC
    4.
    发明授权
    Ideal switch bridgeless PFC 有权

    公开(公告)号：US10186955B2

    公开(公告)日：2019-01-22

    申请号：US15284207

    申请日：2016-10-03

    Applicant: ROMPOWER ENERGY SYSTEMS, INC.

    Inventor： Ionel Jitaru ,  Marco Antonio Davila ,  Cosmin Andrei Tamas

    IPC: H02M1/42

    Abstract: Ideal switch bridgeless PFC topologies are presented with the purpose of increasing the efficiency in power factor correction circuits and inverter applications. The topology also leverages the new GaN switches that are available. This patent offers also a very good solution for the Zero crossing distortion problem improving greatly the THD both in power factor correction and inverter applications.

    True soft switching by timed steering of a current source
    5.
    发明授权
    True soft switching by timed steering of a current source 有权

    公开(公告)号：US10050545B2

    公开(公告)日：2018-08-14

    申请号：US15899243

    申请日：2018-02-19

    Applicant: ROMPOWER ENERGY SYSTEMS, INC.

    Inventor： Ionel Jitaru

    IPC: H02M3/335 ,  H02M1/12 ,  H02M1/00

    CPC classification number: H02M3/33592 ,  H02M1/12 ,  H02M3/3353 ,  H02M3/33553 ,  H02M2001/0058 ,  Y02B70/1475 ,  Y02B70/1491

    Abstract: A method for operation of a single-ended forward converter to achieve “true soft switching” The method includes injecting, with a current source and in transformer winding, a narrow pulse of current via an injection winding of the transformer to add such pulse to the magnetizing current to exceed the current level of current passing through freewheeling rectifier to reduce that current to zero time when the freewheeling rectifier is turns off at zero current conditions. Further, the sum of the magnetizing current and the injected current provide the current required by the output inductor during the transition time. The amplitude of injected current is defined such that the sum is greater than the minimum current through the output inductor (at least by an amount that reflects into the primary winding). The amount of current reflected in the primary is chosen to be sufficiently large to discharge parasitic capacitances reflected across the primary main switch to zero during the transition time.

    PACKAGING METHOD FOR VERY HIGH DENSITY CONVERTERS
    6.
    发明申请
    PACKAGING METHOD FOR VERY HIGH DENSITY CONVERTERS 审中-公开
    非常高密度转换器的封装方法

    公开(公告)号：US20160359426A1

    公开(公告)日：2016-12-08

    申请号：US15103617

    申请日：2014-12-11

    Applicant: ROMPOWER ENERGY SYSTEMS INC.

    Inventor： Ionel Jitaru ,  Ian Poynton ,  Enrique Velasco

    IPC: H02M7/00 ,  H02M7/21 ,  H05K1/14 ,  H05K1/02 ,  H05K9/00 ,  H05K1/18

    CPC classification number: H02M7/003 ,  H02M7/21 ,  H05K1/0203 ,  H05K1/0256 ,  H05K1/14 ,  H05K1/181 ,  H05K3/366 ,  H05K9/0071 ,  H05K2201/042 ,  H05K2201/044 ,  H05K2201/047 ,  H05K2201/062 ,  H05K2201/09063 ,  H05K2201/0999 ,  H05K2201/10015 ,  H05K2201/10166

    Abstract: Meeting todays requirement in power supply technology demands significant technological advancement in optimizing circuit topology, components and materials, thermal and packaging designs. These requirements are being pushed mainly by continuously increasing power density and efficiency requirements. Ultimately, these trends will come to a point whereby limitations from the above mentioned technological advancements is dependent on one of the above, which is the packaging design. To realize this dependence, we need to look at the growing power systems for modern equipment out there. Let us enumerate some of the available AC adapters in terms of power densities of a 45 W adapter. Firstly, square type architecture introduced by Apple is about 7 W/in3, considering the packaging has a profile limitation whereby its AC plug is removable thus occupying relatively bigger chunk of the volume. The next one is by Asus of similar profile to Apple incorporating the AC Plug eliminating the socket assembly in the packaging; which packs about 9 W/in3. Lastly, the typical rectangular profile by Eos which is about 7 W/in3. As for this particular embodiment it is about 40% smaller in profile, in contrast to the 45 W Apple packaging, with increase power density of about 12 W/in3. Packaging design method plays a great role in achieving the above requirements for a very high density converters.

    Abstract translation: 电源技术的今天要求在优化电路拓扑，组件和材料，热和封装设计方面需要显着的技术进步。 这些要求主要是通过不断提高功率密度和效率要求来推动的。 最终，这些趋势将会出现，上述技术进步的限制取决于上述之一，即包装设计。 为了实现这种依赖，我们需要看现在的设备不断增长的电力系统。 在45 W适配器的功率密度方面，我们列举一些可用的交流适配器。 首先，Apple推出的Square型架构约为7W / in3，考虑到封装具有配置限制，其AC插头可拆卸，因此占据相对较大的块体积。 接下来的一个是华硕与苹果相似的配置，包括交流插头，消除了包装中的插座组件; 其中包装约9 W / in3。 最后，Eos的典型矩形轮廓约为7 W / in3。 对于这个特定的实施例，与45W苹果包装相比，其功率密度增加约为12W / in3，约为40％。 包装设计方法对于实现上述高密度转换器的要求起着重要作用。

    TRUE SOFT SWITCHING BY TIMED STEERING OF A CURRENT SOURCE
    8.
    发明申请
    TRUE SOFT SWITCHING BY TIMED STEERING OF A CURRENT SOURCE 审中-公开

    公开(公告)号：US20180198374A1

    公开(公告)日：2018-07-12

    申请号：US15899243

    申请日：2018-02-19

    Applicant: ROMPOWER ENERGY SYSTEMS, INC.

    Inventor： Ionel Jitaru

    IPC: H02M3/335 ,  H02M1/12

    CPC classification number: H02M3/33592 ,  H02M1/12 ,  H02M3/3353 ,  H02M3/33553 ,  H02M2001/0058

    Abstract: A method for operation of a single-ended forward converter to achieve “true soft switching” The method includes injecting, with a current source and in transformer winding, a narrow pulse of current via an injection winding of the transformer to add such pulse to the magnetizing current to exceed the current level of current passing through freewheeling rectifier to reduce that current to zero time when the freewheeling rectifier is turns off at zero current conditions. Further, the sum of the magnetizing current and the injected current provide the current required by the output inductor during the transition time. The amplitude of injected current is defined such that the sum is greater than the minimum current through the output inductor (at least by an amount that reflects into the primary winding). The amount of current reflected in the primary is chosen to be sufficiently large to discharge parasitic capacitances reflected across the primary main switch to zero during the transition time.

    Soft transition on all switching elements two transistors forward converter
    9.
    发明授权
    Soft transition on all switching elements two transistors forward converter 有权

    公开(公告)号：US09899929B2

    公开(公告)日：2018-02-20

    申请号：US14890088

    申请日：2014-05-12

    Applicant: Rompower Energy Systems, Inc.

    Inventor： Ionel Jitaru ,  Marco Antonio Davila

    IPC: H02M3/335 ,  H02M1/00

    CPC classification number: H02M3/33592 ,  H02M1/12 ,  H02M3/3353 ,  H02M3/33553 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491

    Abstract: A method is shown to improve any forward topology operation to achieve efficient resonant transitions by actively shorting the magnetizing inductance and release the short at another time thus producing lower switching losses independent of frequency. In another embodiment of this invention the current from the output inductor is allowed to go negative before the freewheeling synchronous rectifier is turned off, pushing the current back into the primary to create a soft transition across the switching elements before they are turned on. In another embodiment of the invention a current source is used to inject a negative current through the freewheeling synchronous rectifier before is turned off with the purpose of transferring the current into the primary to discharge the parasitic capacitances of the primary switchers before are turned on. An optimized control method can be utilized to tailor the frequency to create the necessary conditions requested by the embodiments of the invention.

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