公开(公告)号：US08018740B2

公开(公告)日：2011-09-13

申请号：US12683743

申请日：2010-01-07

申请人： Bosheng Sun ,  Yuwei Luo ,  Zhong Ye

发明人： Bosheng Sun ,  Yuwei Luo ,  Zhong Ye

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/33569 ,  H02M1/36 ,  Y02B70/1433

摘要： An embodiment of the invention provides a method of reducing surge current in an LLC converter. The LLC converter comprises a switching circuit having a first switch and a second switch, a resonant circuit, and a rectification circuit. During start up of the LLC converter, first and second signals having a fixed period and a variable duty cycle are applied to the first and second switches respectively. When a predetermined voltage on a load configured to be coupled to the rectification circuit is reached, the first and second signals are changed to signals having a variable period and a fixed duty cycle.

摘要翻译： 本发明的实施例提供了一种在LLC转换器中减少浪涌电流的方法。 LLC转换器包括具有第一开关和第二开关，谐振电路和整流电路的开关电路。 在LLC转换器启动期间，具有固定周期和可变占空比的第一和第二信号分别施加到第一和第二开关。 当达到配置为耦合到整流电路的负载上的预定电压达到时，第一和第二信号被改变为具有可变周期和固定占空比的信号。

公开(公告)号：US08879279B2

公开(公告)日：2014-11-04

申请号：US13107423

申请日：2011-05-13

申请人： Yuwei Luo ,  Bosheng Sun

发明人： Yuwei Luo ,  Bosheng Sun

IPC分类号： H02M3/335 ,  H02M1/00

CPC分类号： H02M3/33507 ,  H02M3/33592 ,  H02M2001/0019 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491

摘要： One embodiment relates to an LLC resonant power converter system. The system includes a transformer comprising a primary inductor and a secondary inductor and a switch control stage configured to generate a plurality of switching signals having a duty-cycle. The system also includes an input stage comprising the primary inductor and a plurality of switches that are controlled in response to the respective plurality of switching signals to generate a primary resonant current and an output stage comprising the secondary inductor and being configured to conduct an output current through a load based on a secondary resonant current to generate an output voltage. The system further includes a controller configured to limit a magnitude of the output current to a predetermined magnitude in response to variations of the load.

摘要翻译： 一个实施例涉及LLC谐振功率转换器系统。 该系统包括一个包括主电感器和次级电感器的变压器以及被配置为产生具有占空比的多个开关信号的开关控制级。 该系统还包括一个包括初级电感器和多个开关的输入级，多个开关被响应于相应的多个开关信号而被控制以产生初级谐振电流，而输出级包括次级电感器并被配置为传导输出电流 通过基于次级谐振电流的负载来产生输出电压。 该系统还包括控制器，其配置为响应于负载的变化将输出电流的大小限制到预定的大小。

公开(公告)号：US20110211370A1

公开(公告)日：2011-09-01

申请号：US12715342

申请日：2010-03-01

申请人： Yuwei Luo ,  Bosheng Sun ,  Ian Lloyd Bower

发明人： Yuwei Luo ,  Bosheng Sun ,  Ian Lloyd Bower

IPC分类号： H02M3/335

CPC分类号： H02M3/33592 ,  Y02B70/1433 ,  Y02B70/1475

摘要： Systems and methods of resonant DC/DC conversion disclosed herein improve the basic resonant converter designs by proactively setting and coordinating the gate drive timings between the primary side and secondary side. By proactively setting and coordinating gate drives timings between the primary side and secondary side, both efficiency and transient performance optimizations may be achieved with or without diode emulation mode, depending on whether the switching frequency is below resonance or above resonance, and the nature of the load characteristics. If the switching frequency of the converter is determined to be at or below the resonance frequency, the output transistors may be configured to be fully active at or above a predetermined output load current. The turn-on timing of the output transistors is dependant on the load for a given output voltage, and is almost independent of input voltage. Turn-on timing may be significantly different at light load to no load.

摘要翻译： 本文公开的谐振DC / DC转换的系统和方法通过主动设置和协调初级侧和次级侧之间的栅极驱动定时来改善基本谐振转换器设计。 通过主动设置和协调初级侧和次级侧之间的栅极驱动时序，效率和瞬态性能优化可以通过或不使用二极管仿真模式来实现，这取决于开关频率是否低于谐振或高于谐振，并且 负载特性。 如果转换器的开关频率被确定为等于或低于谐振频率，则输出晶体管可以被配置为在预定的输出负载电流或高于预定的输出负载电流下完全有效。 输出晶体管的导通时间取决于给定输出电压的负载，并且几乎与输入电压无关。 轻负载时的开启时间可能会明显不同。

公开(公告)号：US20110164437A1

公开(公告)日：2011-07-07

申请号：US12683743

申请日：2010-01-07

申请人： Bosheng Sun ,  Yuwei Luo ,  Zhong Ye

发明人： Bosheng Sun ,  Yuwei Luo ,  Zhong Ye

IPC分类号： H02M3/335

CPC分类号： H02M3/33569 ,  H02M1/36 ,  Y02B70/1433

摘要： An embodiment of the invention provides a method of reducing surge current in an LLC converter. The LLC converter comprises a switching circuit having a first switch and a second switch, a resonant circuit, and a rectification circuit. During start up of the LLC converter, first and second signals having a fixed period and a variable duty cycle are applied to the first and second switches respectively. When a predetermined voltage on a load configured to be coupled to the rectification circuit is reached, the first and second signals are changed to signals having a variable period and a fixed duty cycle.

摘要翻译： 本发明的实施例提供了一种在LLC转换器中减少浪涌电流的方法。 LLC转换器包括具有第一开关和第二开关，谐振电路和整流电路的开关电路。 在LLC转换器启动期间，具有固定周期和可变占空比的第一和第二信号分别施加到第一和第二开关。 当达到配置为耦合到整流电路的负载上的预定电压达到时，第一和第二信号被改变为具有可变周期和固定占空比的信号。

公开(公告)号：US20120200268A1

公开(公告)日：2012-08-09

申请号：US13365528

申请日：2012-02-03

申请人： Zhong Ye ,  Bosheng Sun

发明人： Zhong Ye ,  Bosheng Sun

IPC分类号： G05F1/70

CPC分类号： H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

摘要： A method of operating a power factor correction (PFC) circuit and a corresponding power factor correction circuit include determining an adaptive switching frequency of the PFC circuit related to a current of the boost inductor of the PFC circuit, and operating the PFC circuit at a light load based on the adaptive switching frequency.

摘要翻译： 一种操作功率因数校正（PFC）电路和相应的功率因数校正电路的方法包括：确定与PFC电路的升压电感器的电流有关的PFC电路的自适应开关频率，以及以光照操作PFC电路 基于自适应切换频率的负载。

公开(公告)号：US08971075B2

公开(公告)日：2015-03-03

申请号：US13365528

申请日：2012-02-03

申请人： Zhong Ye ,  Bosheng Sun

发明人： Zhong Ye ,  Bosheng Sun

IPC分类号： H02M7/217 ,  H02M1/42

CPC分类号： H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

摘要： A method of operating a power factor correction (PFC) circuit and a corresponding power factor correction circuit include determining an adaptive switching frequency of the PFC circuit related to a current of the boost inductor of the PFC circuit, and operating the PFC circuit at a light load based on the adaptive switching frequency.

摘要翻译： 一种操作功率因数校正（PFC）电路和相应的功率因数校正电路的方法包括：确定与PFC电路的升压电感器的电流相关的PFC电路的自适应开关频率，以及以光照操作PFC电路 基于自适应切换频率的负载。