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1. 发明授权

US09419531B2 Forward-flyback DC-DC converter using resonant LC output circuit 有权
标题翻译：使用谐振LC输出电路的正向反激式DC-DC转换器
公开(公告)号：US09419531B2
公开(公告)日：2016-08-16
申请号：US14233675
申请日：2012-07-23
申请人： Hu Zhilun , Yilei Gu , Zhiwei Wen , Changdan Zhang
发明人： Hu Zhilun , Yilei Gu , Zhiwei Wen , Changdan Zhang
IPC分类号： H02M3/335 , H02M1/00
CPC分类号： H02M3/3353 , H02M3/33507 , H02M3/33523 , H02M3/33538 , H02M3/33553 , H02M3/33569 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： A forward-flyback DC-DC converter topology includes a transformer, a main switch, a clamp circuit, first and second rectifying switches, an LC resonant circuit and an output capacitor; a primary winding of the transformer and the main switch are connected in series between a first input terminal and a second input terminal, the clamp circuit constituted by a clamp capacitor and a clamp switch connected in series is connected in parallel with the primary winding or with the main switch, a secondary winding of the transformer includes a forward winding and a flyback winding, a terminal of the primary winding through which current flows into is a dotted terminal of the primary winding, and a connecting mode of a secondary side of the transformer is: the dotted terminal of the forward winding being connected with a first output terminal via the first rectifying switch, a dotted terminal of the flyback winding being connected with a second output terminal via the second rectifying switch, the LC resonant circuit being connected with the first and the second output terminals and an unlike terminal of the forward winding and the flyback winding so that the first and the second rectifying switches implement zero-current switching, and the output capacitor being connected between the first and the second output terminals.
摘要翻译：正向反激式DC-DC转换器拓扑包括变压器，主开关，钳位电路，第一和第二整流开关，LC谐振电路和输出电容器; 变压器和主开关的初级绕组串联连接在第一输入端和第二输入端之间，由钳位电容器和串联连接的钳位开关构成的钳位电路与初级绕组并联连接，或与主开关，变压器的次级绕组包括正向绕组和反激绕组，电流流入的初级绕组的端子是初级绕组的点线端子，并且变压器的次级侧的连接模式是：正向绕组的点状端子经由第一整流开关与第一输出端子连接，反激绕组的虚线端子经由第二整流开关与第二输出端子连接，LC谐振电路与第一和第二输出端子以及正向绕组和反激绕组的不同端子，使得第一和第二整流开关实现零电流开关，输出电容器连接在第一和第二输出端子之间。

2. 发明申请

US20140226367A1 FORWARD-FLYBACK DC-DC CONVERTER TOPOLOGY OF HIGH EFFICIENCY AND LOW COST 有权
标题翻译：前向逆变DC-DC转换器的高效率和低成本拓扑
公开(公告)号：US20140226367A1
公开(公告)日：2014-08-14
申请号：US14233675
申请日：2012-07-23
申请人： Zhilun Hu , Yilei Gu , Zhiwei Wen , Changdan Zhang
发明人： Zhilun Hu , Yilei Gu , Zhiwei Wen , Changdan Zhang
IPC分类号： H02M3/335
CPC分类号： H02M3/3353 , H02M3/33507 , H02M3/33523 , H02M3/33538 , H02M3/33553 , H02M3/33569 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： A forward-flyback DC-DC converter topology includes a transformer, a main switch, a clamp circuit, first and second rectifying switches, an LC resonant circuit and an output capacitor; a primary winding of the transformer and the main switch are connected in series between a first input terminal and a second input terminal, the clamp circuit constituted by a clamp capacitor and a clamp switch connected in series is connected in parallel with the primary winding or with the main switch, a secondary winding of the transformer includes a forward winding and a flyback winding, a terminal of the primary winding through which current flows into is a dotted terminal of the primary winding, and a connecting mode of a secondary side of the transformer is: the dotted terminal of the forward winding being connected with a first output terminal via the first rectifying switch, a dotted terminal of the flyback winding being connected with a second output terminal via the second rectifying switch, the LC resonant circuit being connected with the first and the second output terminals and an unlike terminal of the forward winding and the flyback winding so that the first and the second rectifying switches implement zero-current switching, and the output capacitor being connected between the first and the second output terminals.
摘要翻译：正向反激式DC-DC转换器拓扑包括变压器，主开关，钳位电路，第一和第二整流开关，LC谐振电路和输出电容器; 变压器和主开关的初级绕组串联连接在第一输入端和第二输入端之间，由钳位电容器和串联连接的钳位开关构成的钳位电路与初级绕组并联连接，或与主开关，变压器的次级绕组包括正向绕组和反激绕组，电流流入的初级绕组的端子是初级绕组的点线端子，并且变压器的次级侧的连接模式是：正向绕组的点状端子经由第一整流开关与第一输出端子连接，反激绕组的虚线端子经由第二整流开关与第二输出端子连接，LC谐振电路与第一和第二输出端子以及正向绕组和反激绕组的不同端子，使得第一和第二整流开关实现零电流开关，输出电容器连接在第一和第二输出端子之间。

3. 发明申请

US20130069435A1 Pre-Stage Boost Device for UPS 审中-公开
标题翻译： UPS前级升压装置
公开(公告)号：US20130069435A1
公开(公告)日：2013-03-21
申请号：US13574541
申请日：2011-01-25
申请人： Lunquan Li , Heming Li , Shuqin Zhuang , Feng He , Yilei Gu
发明人： Lunquan Li , Heming Li , Shuqin Zhuang , Feng He , Yilei Gu
IPC分类号： H02J9/04
CPC分类号： H02J9/04 , H02J9/06 , H02M1/4208 , H02M3/158 , Y02B70/126 , Y10T307/625
摘要： A pre-stage boost device, comprising: a selector switch (130); a power factor inductor (140), a common boost circuit (150), a rectifier circuit (160), and a filter circuit (170). The common boost circuit includes: connected in series a first switch (Q1), a second switch (Q2) and a third switch (Q3). The rectifier circuit includes two rectifier diodes (D5, D6). The filter circuit includes connected in series two capacitors (C1, C2). Maximum multiplexing of the main power components under the battery mode and the commercial power mode is achieved by this invention, the cost to performance ratio is also improved.
摘要翻译：一种前级升压装置，包括：选择器开关（130）; 功率因数电感器（140），公共升压电路（150），整流器电路（160）和滤波器电路（170）。公共升压电路包括：串联连接第一开关（Q1），第二开关（Q2）和第三开关（Q3）。整流电路包括两个整流二极管（D5，D6）。滤波器电路包括串联两个电容器（C1，C2）。通过本发明实现了电池模式下的主要功率部件和商业功率模式的最大复用，性价比也提高了。

4. 发明授权

US06370044B1 Synchronous rectifier circuit 有权
标题翻译：同步整流电路
公开(公告)号：US06370044B1
公开(公告)日：2002-04-09
申请号：US09855006
申请日：2001-05-14
申请人： Alpha J. Zhang , Guisong Huang , Yilei Gu
发明人： Alpha J. Zhang , Guisong Huang , Yilei Gu
IPC分类号： H02M3335
CPC分类号： H02M3/33592 , Y02B70/1475
摘要： A self-driven synchronous rectifier circuit applied to a forward converter is provided. The circuit includes a transformer having a primary winding and a secondary winding for converting an input voltage into an output voltage, a first synchronous rectifier switch and a second synchronous rectifier switch connected to the secondary winding for rectifying the output voltage; and an auxiliary switch, wherein the gate terminal thereof is connected to the gate terminal of the first synchronous rectifier switch and the positive end of the secondary winding, the source terminal thereof is connected to the drain terminal of the first synchronous rectifier switch and the negative end of the secondary winding, and the drain terminal thereof is connected to the gate terminal of the second synchronous rectifier switch.
摘要翻译：提供了一种应用于正激变换器的自驱动同步整流电路。电路包括具有初级绕组和用于将输入电压转换为输出电压的次级绕组的变压器，连接到次级绕组的第一同步整流开关和第二同步整流器开关，用于整流输出电压; 以及辅助开关，其栅极端子连接到第一同步整流开关的栅极端子和次级绕组的正极，其源极端子连接到第一同步整流器开关的漏极端子，负极次级绕组的端部，其漏极端子连接到第二同步整流器开关的栅极端子。

5. 发明授权

US06469915B2 Resonant reset dual switch forward DC-to-DC converter 有权
标题翻译：谐振复位双开关正向直流到直流转换器
公开(公告)号：US06469915B2
公开(公告)日：2002-10-22
申请号：US09845686
申请日：2001-04-30
申请人： Guisong Huang , Yilei Gu , Zhizheng Liu , Alpha J. Zhang
发明人： Guisong Huang , Yilei Gu , Zhizheng Liu , Alpha J. Zhang
IPC分类号： H02M3335
CPC分类号： H02M3/33569 , Y02B70/1433
摘要： A resonant reset dual switch forward converter is disclosed. The resonant reset dual switch forward converter includes an input for accepting a DC voltage; a transformer having a primary winding and a secondary winding; a first and a second switch connected in series with the primary winding of the transformer for periodically connecting the input to the primary winding; a resonant capacitor for resetting the transformer during the OFF time of the first and second switches; and an auxiliary switch remaining OFF during the ON time of the first and second switches, and connecting the primary winding to the resonant capacitor during the OFF time of the first and second switches. The resonant reset dual switch forward converter provides a switching duty cycle greater than 50%, obtains a zero-voltage-switching condition for the first and second switches, and maintains the voltage stress of the f first and second switches around the input voltage.
摘要翻译：公开了一种谐振复位双开关正激变换器。谐振复位双开关正激转换器包括用于接受直流电压的输入; 具有初级绕组和次级绕组的变压器; 与变压器的初级绕组串联连接的第一和第二开关，用于周期性地将输入连接到初级绕组; 用于在所述第一和第二开关的断开时间期间复位所述变压器的谐振电容器; 并且辅助开关在第一和第二开关的接通时间期间保持OFF，并且在第一和第二开关的OFF时间期间将初级绕组连接到谐振电容器。谐振复位双开关正激转换器提供大于50％的开关占空比，获得第一和第二开关的零电压切换条件，并保持第一和第二开关周围的输入电压的电压应力。

6. 发明授权

US06424543B1 Integral DC to DC converter 有权
公开(公告)号：US06424543B1
公开(公告)日：2002-07-23
申请号：US09811757
申请日：2001-03-19
申请人： Alpha J. Zhang , Guisong Huang , Yilei Gu
发明人： Alpha J. Zhang , Guisong Huang , Yilei Gu
IPC分类号： H02M3335
CPC分类号： H02M1/10 , H02M3/33569
摘要： An integral DC to DC converter includes an input capacitor, a DC to AC circuit, a transformer, a rectifying circuit, a filtering capacitor and a control signal generator. The DC to AC circuit is connected with the input capacitor for converting the input DC voltage to a high frequency first AC voltage and the DC to AC circuit includes four full-bridge switching devices. The transformer is used for converting the first AC voltage into a second AC voltage. The rectifying circuit is connected to the secondary winding of the transformer for rectifying the second AC voltage to the output DC voltage. The filtering capacitor is connected to the rectifying circuit for filtering the output DC voltage. The control signal generator is used for providing a control signal to control the full-bridge switching device.

7. 发明授权

US06396715B1 DC to DC converter for operating in selectable voltage modes 有权
标题翻译： DC至DC转换器，可在可选择的电压模式下工作
公开(公告)号：US06396715B1
公开(公告)日：2002-05-28
申请号：US09811680
申请日：2001-03-19
申请人： Alpha J. Zhang , Guisong Huang , Yilei Gu
发明人： Alpha J. Zhang , Guisong Huang , Yilei Gu
IPC分类号： H02M3335
CPC分类号： H02M1/10 , H02M3/33569
摘要： An integral DC to DC converter for converting at least one input DC voltage into at least one output DC voltage is provided. The integral DC to DC converter includes a first input capacitor and a second input capacitor for providing the at least one input DC voltage, a DC to AC circuit, a transformer, a rectifying circuit, a filtering capacitor, two input DC voltage switching elements and an output voltage switching element. The integral DC to DC converter is implemented by switching the switching elements.
摘要翻译：提供一种用于将至少一个输入DC电压转换成至少一个输出DC电压的集成DC-DC转换器。积分DC-DC转换器包括第一输入电容器和第二输入电容器，用于提供至少一个输入DC电压，DC至AC电路，变压器，整流电路，滤波电容器，两个输入DC电压开关元件和输出电压开关元件。通过切换开关元件来实现集成的DC-DC转换器。

8. 发明授权

US06344979B1 LLC series resonant DC-to-DC converter 有权
标题翻译： LLC串联谐振DC-DC转换器
公开(公告)号：US06344979B1
公开(公告)日：2002-02-05
申请号：US09780128
申请日：2001-02-09
申请人： Guisong Huang , Alpha J. Zhang , Yilei Gu
发明人： Guisong Huang , Alpha J. Zhang , Yilei Gu
IPC分类号： H02M3335
CPC分类号： H02M3/337 , H02M3/3382 , Y02B70/1433
摘要： The present invention discloses a DC-to-DC converter. The DC-to-DC converter includes a square wave generator for generating a sequence of output voltages having a waveform of square wave. The DC-to-DC converter further includes a resonant tank connected to the square wave generator comprising a series capacitor connected to a series inductor and a parallel inductor. The DC-to-DC converter further includes a transformer having a primary side connected in series with the series inductor and connected in parallel to the parallel inductor. The transformer further includes a secondary side for connecting to a rectifying circuit for providing a rectified DC voltage to an output load circuit. The series capacitor functioning with the series inductor to provide a first characteristic resonant frequency represented by ƒs, and the series capacitor functioning with the series inductor and the parallel inductor to provide a second characteristic resonant frequency represented by ƒm wherein ƒs>ƒm. The converter runs at variable frequency switching to perform output regulation. The converter features high conversion efficiency at high input operation by switching at frequency between the first and second characteristic resonant frequency. In a preferred embodiment, the parallel inductor is integrated to transformer as primary magnetizing inductor and in further the series inductor may also be integrated into transformer.
摘要翻译：本发明公开了一种DC-DC转换器。 DC-DC转换器包括用于产生具有方波波形的输出电压序列的方波发生器。 DC-DC转换器还包括连接到方波发生器的谐振槽，其包括连接到串联电感器和并联电感器的串联电容器。 DC-DC转换器还包括具有与串联电感器串联连接并与并联电感并联连接的初级侧的变压器。变压器还包括用于连接到整流电路的次级侧，用于向输出负载电路提供经整流的DC电压。串联电容器与串联电感器起作用以提供由ƒs表示的第一特性谐振频率，以及串联电容器与串联电感器和并联电感器起作用，以提供由ƒm表示的第二特性谐振频率，其中ƒs>ƒm。转换器以可变频率切换运行，以执行输出调节。该转换器在高输入操作下通过在第一和第二特性谐振频率之间切换频率而具有高转换效率。在优选实施例中，并联电感器作为主要磁化电感器集成到变压器中，并且还可将串联电感器集成到变压器中。

9. 发明授权

US06714428B2 Combined transformer-inductor device for application to DC-to-DC converter with synchronous rectifier 有权
标题翻译：用于同步整流器的DC-DC转换器的组合变压器 - 电感器件
公开(公告)号：US06714428B2
公开(公告)日：2004-03-30
申请号：US10107733
申请日：2002-03-26
申请人： Guisong Huang , Yilei Gu , Yuequan Hu , Alpha J. Zhang , Jack Hsiao
发明人： Guisong Huang , Yilei Gu , Yuequan Hu , Alpha J. Zhang , Jack Hsiao
IPC分类号： H02M542
CPC分类号： H02M3/33592 , Y02B70/1475
摘要： An active clamped-mode DC-to-DC converter with synchronous rectifiers and a combined transformer-inductor device is provided. The power converter includes a combined transformer-inductor device having a primary winding, a secondary winding, and an auxiliary winding where the primary and the secondary windings perform a transformer function and the auxiliary winding performs an output filter function, a switching circuit for periodically providing a positive voltage to the primary winding and a negative voltage to reset the primary winding, and a synchronous rectification circuit connected for enabling conduction from the secondary winding to an output port in which the auxiliary winding is coupled between the output port and the synchronous rectification circuit for providing an inductance to filter an output signal.
摘要翻译：提供具有同步整流器和组合变压器 - 电感器装置的有源钳位模式DC-DC转换器。功率转换器包括具有初级绕组，次级绕组和辅助绕组的组合变压器 - 电感器装置，其中初级绕组和次级绕组执行变压器功能，并且辅助绕组执行输出滤波器功能，用于周期性地提供对初级绕组施加正电压和负电压以复位初级绕组;以及同步整流电路，其连接用于使得能够从次级绕组传导到输出端口，其中辅助绕组耦合在输出端口和同步整流电路之间用于提供电感以对输出信号进行滤波。

10. 发明授权

US06466458B2 Asymmetrical full bridge DC-to-DC converter 有权
标题翻译：不对称全桥直流到直流转换器
公开(公告)号：US06466458B2
公开(公告)日：2002-10-15
申请号：US09782573
申请日：2001-02-12
申请人： Alpha J. Zhang , Guisong Huang , Yilei Gu
发明人： Alpha J. Zhang , Guisong Huang , Yilei Gu
IPC分类号： H02M3335
CPC分类号： H02M3/3372 , H02M3/33569
摘要： An asymmetrical full bridge DC-to-DC converter comprises an asymmetrical full bridge circuit which includes main switches and auxiliary switches, a capacitor connected in series to the branch circuit of the auxiliary switches, and a transformer having a primary winding and a secondary winding. The primary winding of transformer is connected to the common point of each leg of the full bridge. A rectification circuit is connected at the secondary winding of the transformer to obtain dc voltage output. In operation, an asymmetrical control method is applied for these main switches and auxiliary switches. Main switches and auxiliary switches turn on and turn off compensatively. A linear control characteristic of output voltage to switching duty cycle and an optimal reset of the transformer core is achieved by this invention.
摘要翻译：不对称全桥DC-DC转换器包括一个非对称全桥电路，它包括主开关和辅助开关，一个与辅助开关的分支电路串联连接的电容器，以及一个具有初级绕组和次级绕组的变压器。变压器的初级绕组连接到全桥的每条腿的公共点。整流电路连接在变压器的次级绕组，以获得直流电压输出。在这些主开关和辅助开关中，采用非对称控制方式。主开关和辅助开关补偿打开和关闭。通过本发明实现了输出电压对开关占空比的线性控制特性和变压器磁芯的最佳复位。

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