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1. 发明授权

US07050309B2 Power converter with output inductance 有权
标题翻译：功率转换器，输出电感
公开(公告)号：US07050309B2
公开(公告)日：2006-05-23
申请号：US10729430
申请日：2003-12-05
申请人： Richard Farrington
发明人： Richard Farrington
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , Y02B70/1475
摘要： In a power converter, the duty cycle of a primary winding circuit causes near continuous flow of power through the primary and secondary winding circuits during normal operation. By providing no regulation during normal operation, a very efficient circuit is obtained with a synchronous rectifier in the secondary operating at all times. However, during certain conditions such as start up or a short-circuit, the duty cycle of the primary may be reduced to cause freewheeling periods. To simplify the gate drive, the synchronous rectifiers may be allowed to turn off during the freewheeling periods, resulting in large ripple. A filter inductance of the secondary winding circuit reduces that ripple, and is sufficient to minimize ripple during normal operation, but still allows large ripple during the freewheeling periods. By accepting large ripple during other than normal operation, a smaller filter inductance can be used.
摘要翻译：在功率转换器中，初级绕组电路的占空比在正常工作期间通过初级绕组电路和次级绕组电路产生近乎连续的电力流动。通过在正常工作期间不提供调节，在二次操作中始终可以使用同步整流器获得非常有效的电路。然而，在诸如启动或短路的某些条件下，初级的占空比可以减小以产生续流周期。为了简化栅极驱动，可以允许同步整流器在续流期间关断，导致大的纹波。次级绕组电路的滤波电感减小了纹波，并且足以使正常操作期间的纹波最小化，但在续流期间仍然允许较大的纹波。通过在正常工作以外接受大的纹波，可以使用较小的滤波电感。

2. 发明授权

US06927987B2 Half-bridge isolation stage topologies 有权
标题翻译：半桥隔离级拓扑
公开(公告)号：US06927987B2
公开(公告)日：2005-08-09
申请号：US10293961
申请日：2002-11-13
申请人： Richard Farrington , Abram P. Dancy , Leif E. LaWhite , Martin F. Schlecht
发明人： Richard Farrington , Abram P. Dancy , Leif E. LaWhite , Martin F. Schlecht
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , H02M3/33569 , Y02B70/1475
摘要： Half-bridge isolation stage topologies are provided in power converters, dividing an input voltage between capacitors. Primary transformer windings are periodically switched across respective capacitors. In current-fed implementations, the current flow through the primary windings is constrained as by an inductive element. In some implementations, a capacitor, primary winding and switch are connected in series in different orders in each of plural legs across the input. Current feed circuitry includes a current constraining component connecting nodes within each of respective legs. The switches of the isolation stage may be turned on with a fixed duty cycle, and a secondary circuit may comprise synchronous rectifiers.
摘要翻译：电源转换器提供半桥隔离级拓扑，在电容器之间划分输入电压。主变压器绕组在相应的电容器周期性地切换。在电流馈电实现中，通过初级绕组的电流流过电感元件受到约束。在一些实施方案中，电容器，初级绕组和开关以不同的顺序串联连接，跨越输入端的多个腿中的每一个。电流馈电电路包括连接各个腿内的节点的电流约束部件。隔离级的开关可以以固定的占空比导通，并且次级电路可以包括同步整流器。

3. 发明授权

US06169683A Resonant gate drive for synchronous rectifiers 有权
标题翻译：用于同步整流器的谐振栅极驱动
公开(公告)号：US06169683A
公开(公告)日：2001-01-02
申请号：US09414247
申请日：1999-10-07
申请人： Richard Farrington
发明人： Richard Farrington
IPC分类号： H02M7217
CPC分类号： H02M3/33592 , Y02B70/1433 , Y02B70/1475
摘要： An externally-driven synchronous rectifier circuit (18) comprises first and second synchronous rectifiers (SQ1, SQ2), and first and second synchronous rectifier recovery switches (SQ3, SQ5), and a pair of resonant inductors (LR1, LR2). The resonant inductors (LR1, LR2) store the energy normally loss during charging and discharging the input capacitance of the first and second synchronous rectifiers (SQ1, SQ2). The recovery switches (SQ3, SQ5) transfer the stored energy from the at least one inductor (LR) to the output terminal (Vout) creating a more energy efficient circuit (18).
摘要翻译：外部驱动的同步整流电路（18）包括第一和第二同步整流器（SQ1，SQ2）和第一和第二同步整流器恢复开关（SQ3，SQ5）和一对谐振电感器（LR1，LR2）。在对第一和第二同步整流器（SQ1，SQ2）的输入电容进行充电和放电期间，谐振电感器（LR1，LR2）存储能量的正常损耗。恢复开关（SQ3，SQ5）将存储的能量从至少一个电感器（LR）传送到输出端子（Vout），从而产生更节能的电路（18）。

4. 发明授权

US06307458B1 Split inductor with fractional turn of each winding and PCB including same 有权
$Split inductor with fractional turn of each winding and PCB including same$
标题翻译：每个绕组和PCB的分数电感分压电感包括相同
公开(公告)号：US06307458B1
公开(公告)日：2001-10-23
申请号：US09401573
申请日：1999-09-22
申请人： Jun Zhang , Richard Farrington , William Hart
发明人： Jun Zhang , Richard Farrington , William Hart
IPC分类号： H01F500
CPC分类号： H01F27/2804 , H01F17/0006 , H01F27/34 , H01F2017/0093 , H02M3/28 , H05K1/0233 , H05K1/165 , H05K2201/086 , H05K2201/09063
摘要： An inductor configuration (50) comprising a three-legged inductor core (20) with a first leg (22), second leg (24), and third leg (26) integrally extending from a base (28). The first leg (22) and second leg (24) are predisposed and spaced about a first surface (30) of the base (28) to form a first channel area (32). The second leg (24) also forms, along with the third leg (26), a second channel area (34) separated from the first channel area (32) by the second leg (24). The inductor also comprises an inductor winding (36) arranged about the inductor core (20) to provide relatively equal magnetic flux through the first leg (22), second leg (24), and third leg (26) when current flows through the inductor winding (36). The inductor configuration may be used as an input or output inductor for a synchronous rectifier circuit (100).
摘要翻译：一种电感器配置（50），包括具有第一支腿（22），第二支腿（24）和从底座（28）整体延伸的第三支腿（26）的三脚电感芯（20）。第一腿部（22）和第二腿部（24）被预先设置并围绕基部（28）的第一表面（30）间隔开以形成第一通道区域（32）。第二腿部（24）还与第三腿部（26）一起形成通过第二腿部（24）与第一通道区域（32）分离的第二通道区域（34）。电感器还包括绕电感器芯（20）布置的电感器绕组（36），以在电流流过电感器时提供通过第一腿部（22），第二腿部（24）和第三腿部（26）的相对相等的磁通量绕组（36）。电感器配置可以用作同步整流电路（100）的输入或输出电感器。

5. 发明申请

US20060262575A1 Power converter with isolated and regulation stages 有权
标题翻译：电源转换器具有隔离和调节级
公开(公告)号：US20060262575A1
公开(公告)日：2006-11-23
申请号：US11407699
申请日：2006-04-20
申请人： Martin Schlecht , Richard Farrington
发明人： Martin Schlecht , Richard Farrington
IPC分类号： H02M3/335
CPC分类号： H02M3/33561 , H02M3/33592 , Y02B70/1475
摘要： In a power converter, the duty cycle of a primary winding circuit causes near continuous flow of power through the primary and secondary winding circuits during normal operation. By providing no regulation during normal operation, a very efficient circuit is obtained with a synchronous rectifier in the secondary operating at all times. However, during certain conditions such as start up or a short-circuit, the duty cycle of the primary may be reduced to cause freewheeling periods. A normally non-regulating isolation stage may be followed by plural non-isolating regulation stages. To simplify the gate drive, the synchronous rectifiers may be allowed to turn off for a portion of the cycle when the duty cycle is reduced. A filter inductance of the secondary winding circuit is sufficient to minimize ripple during normal operation, but allows large ripple when the duty cycle is reduced. By accepting large ripple during other than normal operation, a smaller filter inductance can be used.
摘要翻译：在功率转换器中，初级绕组电路的占空比在正常工作期间通过初级绕组电路和次级绕组电路产生近乎连续的电力流动。通过在正常工作期间不提供调节，在二次操作中始终可以使用同步整流器获得非常有效的电路。然而，在诸如启动或短路的某些条件下，初级的占空比可以减小以产生续流周期。正常非调节隔离阶段之后可以是多个非隔离调节阶段。为了简化栅极驱动，当占空比减小时，同步整流器可以被允许关闭周期的一部分。次级绕组电路的滤波电感足以在正常工作期间最小化纹波，但是当占空比减小时允许较大的纹波。通过在正常工作以外接受大的纹波，可以使用较小的滤波电感。

6. 发明授权

US06188586B1 Asymmetrical half-bridge power converter having reduced input ripple and method of manufacturing the same 失效
标题翻译：具有减小的输入纹波的非对称半桥功率转换器及其制造方法
公开(公告)号：US06188586B1
公开(公告)日：2001-02-13
申请号：US09553824
申请日：2000-04-21
申请人： Richard Farrington , Mark E. Jacobs , Rui Liu , Vijayan J. Thottuvelil
发明人： Richard Farrington , Mark E. Jacobs , Rui Liu , Vijayan J. Thottuvelil
IPC分类号： H02M3335
CPC分类号： H02M3/337 , H02M1/15
摘要： An asymmetrical half-bridge power converter and a method of manufacturing the same. In one embodiment, the asymmetrical half-bridge power converter includes: (1) first and second power switches configured to be controlled by complementary drive signals having nominal first and second duty cycles of D and 1-D, respectively and (2) first and second capacitors, having intrinsic capacitance values proportional to 1-D and D, respectively, and intrinsic equivalent series resistance (ESR) values proportional to D and 1-D, respectively, configured to reduce input ripple current associated with the asymmetrical half-bridge power converter.
摘要翻译：不对称半桥功率转换器及其制造方法。在一个实施例中，非对称半桥功率转换器包括：（1）第一和第二功率开关，其被配置为由分别具有D和1-D的标称第一和第二占空比的互补驱动信号控制，以及（2）第一和分别具有与1-D和D成比例的固有电容值的第二电容器和分别与D和1-D成比例的本征等效串联电阻（ESR）值，其被配置为减少与不对称半桥功率相关联的输入纹波电流转换器。

7. 发明授权

US4931716A Constant frequency zero-voltage-switching multi-resonant converter 失效
标题翻译：恒频零电压开关多谐振转换器
公开(公告)号：US4931716A
公开(公告)日：1990-06-05
申请号：US347853
申请日：1989-05-05
申请人： Milan Jovanovic , Richard Farrington , Fred C. Lee
发明人： Milan Jovanovic , Richard Farrington , Fred C. Lee
IPC分类号： H02M3/158 , H02M3/335
CPC分类号： H02M3/1582 , H02M3/33576 , Y02B70/1425 , Y02B70/1433
摘要： A zero-voltage multi-resonant converter that operates at constant frequency. In the zero-voltage multi-resonant converter, the resonant circuit is formed in a .pi.-network with resonant capacitors connected in parallel with the switches. In practicing the present invention, certain rules are applied to derive a CF ZVS-MRC from a PWM converter. In particular, one resonant capacitor is placed in parallel with the active switch, which may be either uni-directional or bi-directional, the rectifying switch is replaced by another active switch, which may also be uni-directional or bi-directional, another resonant capacitor is placed in parallel with the other active switch, and an inductor is inserted in the loop containing the two switches. This loop can also contain voltage sources and filter or blocking capacitors.
摘要翻译：零电压多谐振转换器，工作在恒定频率。在零电压多谐振转换器中，谐振电路形成在具有与开关并联连接的谐振电容器的pi网络中。在实施本发明时，应用某些规则从PWM转换器导出CF ZVS-MRC。特别地，一个谐振电容器与有源开关并联放置，该开关可以是单向的或双向的，整流开关被另一个有源开关所替代，另一个有源开关也可以是单向的或双向的谐振电容器与另一个有源开关并联放置，并且电感器插入到包含两个开关的环路中。该回路还可以包含电压源和滤波器或阻塞电容器。

8. 发明授权

US06201723B1 Simplified current share circuit 有权
标题翻译：简化电流分配电路
公开(公告)号：US06201723B1
公开(公告)日：2001-03-13
申请号：US09429827
申请日：1999-10-29
申请人： Richard Farrington
发明人： Richard Farrington
IPC分类号： H02M100
CPC分类号： H02J1/102
摘要： A current sharing circuit scheme comprising first and second power modules (36,38) each including an input side (30) and an output side (32), the power modules (36, 38) coupled to each other via respective input sides (30), each of the output sides (32) including a positive terminal and a negative terminal. The circuit scheme also comprises first and second circuit output voltage terminals (47, 46) and first and second set point controls (40, 41) coupled to the negative terminal of each of the output sides (32). First and second initial set point controls (42,45) are included providing current signal paths between corresponding first and second set point controls (40, 41) and the first output voltage terminal (47). The first and second set point controls (40, 41) and the first and second initial set point controls (42, 45) are configured to allow current sharing through said first and second circuit output voltage terminals (47, 46) when a current signal is applied to said input side (30) of said first and second power modules(36,38).
摘要翻译：一种电流共享电路方案，包括每个包括输入侧（30）和输出侧（32）的第一和第二功率模块（36,38），所述功率模块（36,38）经由相应的输入侧（30 ），每个输出侧（32）包括正极端子和负极端子。该电路方案还包括耦合到每个输出侧（32）的负端子的第一和第二电路输出电压端子（47,46）和第一和第二设定点控制（40,41）。包括第一和第二初始设定点控制（42,45），其在相应的第一和第二设定点控制（40,41）和第一输出电压端（47）之间提供电流信号路径。第一和第二设定点控制（40,41）和第一和第二初始设定点控制（42,45）被配置为当电流信号（40,41）和电流信号被施加到所述第一和第二功率模块（36,38）的所述输入侧（30）。

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