公开(公告)号：US06560127B2

公开(公告)日：2003-05-06

申请号：US09849178

申请日：2001-05-04

申请人： Ernest H. Wittenbreder, Jr.

发明人： Ernest H. Wittenbreder, Jr.

IPC分类号： H02M3335

CPC分类号： H02M3/33576

摘要： A highly efficient and simple power conversion circuit (300) having zero voltage switching (ZVS) includes a novel switch timing technique, such that the need for an leakage inductor connected in series with the primary circuit of the converter and rectifier diodes is eliminated. A switch timing circuit (351) located in an output side circuit (350) enables the use of the natural stored magnetic energy in the output side circuit (350) to drive the critical switching transitions to accomplish soft switching for all of the switches (314-317) in a full bridge forward converter (300) for all transitions. This power conversion circuit (300) includes a full bridge circuit (310) having plurality of switching devices (314-317) that intermittently couple the primary winding (327) to the input of the power converter (300). A transformer (326) couples to receive power from the full bridge circuit (310) into its primary winding (327). The output side circuit (310) includes the switching circuit (351) coupled to provide stored magnetic energy to drive the switching transitions of the switching devices (314-317) in the full bridge circuit (310). The switching circuit (351) closes at a predetermined time delay after the switching transitions in the full bridge circuit (310) to accomplish zero voltage switching for the plurality of switches in the full bridge circuit (310). A converter controller provides control signals to the full bridge and the switching circuits (310, 351).

摘要翻译： 具有零电压开关（ZVS）的高效率和简单的功率转换电路（300）包括新颖的开关定时技术，从而消除了与转换器和整流二极管的初级电路串联连接的漏电感器的需要。 位于输出侧电路（350）中的开关定时电路（351）使得能够使用输出侧电路（350）中的自然存储的磁能来驱动关键切换转换，以实现所有开关（314）的软切换 -317）在全桥正向转换器（300）中进行全部转换。 该电力转换电路（300）包括具有将初级绕组（327）间歇地耦合到功率转换器（300）的输入端的多个开关器件（314-317）的全桥电路（310）。 变压器（326）耦合以将功率从全桥电路（310）接收到其初级绕组（327）中。 输出侧电路（310）包括耦合以提供存储的磁能以驱动全桥电路（310）中的开关装置（314-317）的开关转换的开关电路（351）。 在全桥电路（310）中的开关转换之后，开关电路（351）以预定的时间延迟闭合，以实现全桥电路（310）中的多个开关的零电压切换。 A转换器控制器向全桥和开关电路（310,351）提供控制信号。

公开(公告)号：US06580255B1

公开(公告)日：2003-06-17

申请号：US10157102

申请日：2002-05-28

申请人： Ernest H. Wittenbreder, Jr.

发明人： Ernest H. Wittenbreder, Jr.

IPC分类号： G05F110

CPC分类号： H03K17/133 ,  H02M1/08 ,  H02M3/155 ,  H03K17/04123 ,  H03K17/302

摘要： Simple adaptive gate drive circuits, applicable to switches that turn on at zero voltage, such as mosfets or IGBTs, are revealed. The new gate drive circuits improve the timing for turn on of the switches, reduce gate drive losses, and limit gate voltage stress. In its simplest form the gate drive circuit requires only a single small mosfet and two diodes. The adaptive gate drive circuit provides optimal switch turn on timing for the case in which the drive energy available to drive the turn on transition is sufficient to drive the main switch to zero volts. The adaptive gate drive circuit also provides optimal switch turn on timing for the case in which the energy available to drive the transition is insufficient to drive the transition all the way to zero volts, turning the main switch on at the minimum main switch voltage thereby minimizing main switch switching losses.

摘要翻译： 显示适用于零电压接通的开关（如MOSFET或IGBT）的简单自适应栅极驱动电路。 新的栅极驱动电路提高了开关的导通时间，降低了栅极驱动损耗，并限制了栅极电压应力。 在其最简单的形式中，栅极驱动电路仅需要一个小的mosfet和两个二极管。 自适应栅极驱动电路为可用于驱动转换转换的驱动能量足以将主开关驱动到零伏的情况下提供最佳开关导通时序。 自适应栅极驱动电路还为可用于驱动转换的能量不足以将转换一直驱动到零伏特的情况下提供最佳开关导通定时，使主开关以最小主开关电压接通，从而最小化 主开关开关损耗。

公开(公告)号：US08675374B2

公开(公告)日：2014-03-18

申请号：US13197596

申请日：2011-08-03

申请人： Charles Coleman ,  Sam Seiichiro Ochi ,  Ernest H. Wittenbreder, Jr. ,  Yeshoda Yedevelly

发明人： Charles Coleman ,  Sam Seiichiro Ochi ,  Ernest H. Wittenbreder, Jr. ,  Yeshoda Yedevelly

IPC分类号： H02M3/335

CPC分类号： H02M3/1582 ,  H02M3/158 ,  H02M2001/009

摘要： Methods, systems, and devices are described for an adjustment module that interacts with a parameter detection module to provide a threshold value for initiating switching of a switching module in a cyclical electronic system. Aspects of the present disclosure provide a switching module used in conjunction with an inductor that is coupled with the switching module. The threshold voltage for switching the switching module may be adjusted to provide switching at substantially zero volts while maintaining sufficient energy in the inductor to drive the voltage at a switching element in the switching module to zero volts. Such auto-adjustment circuits may allow for enhanced efficiency in cyclical electronic systems. The output of an up/down counter may be used to set another parameter that effects the performance of the cyclical electronic system in order to enhance the performance of the cyclical electronic system.

摘要翻译： 描述了用于与参数检测模块交互以提供用于在循环电子系统中启动交换模块的切换的阈值的调整模块的方法，系统和设备。 本公开的方面提供了与与开关模块耦合的电感器一起使用的开关模块。 可以调节用于切换开关模块的阈值电压以提供基本为零伏特的开关，同时在电感器中保持足够的能量以将开关模块中的开关元件处的电压驱动到零伏特。 这种自动调节电路可以允许在循环电子系统中提高效率。 上/下计数器的输出可以用于设置影响周期性电子系统的性能的另一参数，以便增强循环电子系统的性能。

公开(公告)号：US06483369B1

公开(公告)日：2002-11-19

申请号：US09970365

申请日：2001-10-02

申请人： Ernest H. Wittenbreder, Jr.

发明人： Ernest H. Wittenbreder, Jr.

IPC分类号： H03K17687

CPC分类号： H03K17/102 ,  H03K17/04163 ,  H03K17/08142 ,  H03K17/687 ,  H03K17/6877

摘要： Composite switches comprising multiple mosfets arranged in cascode which achieve higher efficiency and faster switching are revealed. The gate of a lower mosfet, a low voltage small die size mosfet, is driven with a conventional control circuit for modulation of the composite switch. The upper mosfet, a large die size high voltage mosfet, is controlled at its source terminal by the smaller mosfet while the gate of the upper mosfet is connected to a capacitor whose voltage remains fixed such that no net drive power is required by the gate circuit to drive the upper mosfet. The composite switch simultaneously achieves the low conduction losses of a large die device with the gate drive losses and fast switching of a small die device.

摘要翻译： 显示了包括以共源共栅布置的多个mosfet的复合开关，其实现更高的效率和更快的切换。 低级mosfet的栅极，低压小型芯片尺寸的mosfet，由传统的控制电路驱动，用于复合开关的调制。 上部mosfet是一个大型芯片尺寸的高压MOSFET，它的源极端子由较小的mosfet控制，而上部mosfet的栅极连接到电压保持固定的电容器，使栅极电路不需要净功率 驱动上面的mosfet。 复合开关同时通过栅极驱动损耗和小型器件的快速切换实现了大型器件的低导通损耗。

公开(公告)号：US06650550B2

公开(公告)日：2003-11-18

申请号：US10157101

申请日：2002-05-28

申请人： Ernest H. Wittenbreder, Jr.

发明人： Ernest H. Wittenbreder, Jr.

IPC分类号： H02M3335

CPC分类号： H03K17/133 ,  H02M1/08 ,  H02M3/155 ,  H03K17/04123 ,  H03K17/302

摘要： Synchronous rectifier self drive mechanisms are revealed which are universally applicable to zero voltage switching power converters which rely on an auxiliary inductor to drive the critical turn on transition of the main switch of the power converter. The voltage wave form generated by the auxiliary inductor is well suited to synchronous rectifier self drive. Voltage limiting circuits that reduce the voltage swing of synchronous rectifier gates are also revealed. These voltage limiting circuits reduce the energy circulated into and out of the synchronous rectifier gates and protect the synchronous rectifier gate circuits from negative over voltage.

摘要翻译： 同步整流器自驱动机构被广泛应用于依靠辅助电感器来驱动功率转换器主开关的临界转换的零电压开关电源转换器。 由辅助电感产生的电压波形非常适合同步整流器自驱动。 还揭示了降低同步整流门电压摆幅的电压限制电路。 这些限压电路减少了循环进入和流出同步整流器门的能量，并保护同步整流门电路不受负过电压的影响。

公开(公告)号：US06507176B2

公开(公告)日：2003-01-14

申请号：US09946691

申请日：2001-09-04

申请人： Ernest H. Wittenbreder, Jr.

发明人： Ernest H. Wittenbreder, Jr.

IPC分类号： G05F124

CPC分类号： H02M3/005 ,  H02M3/158

摘要： Five circuit synthesis methods, for forming new power conversion circuits with enhanced electromagnetic compatibility and improved AC performance from old circuits with AC performance and/or electromagnetic compatibility deficiencies, are revealed. The new synthesis methods achieve performance improvements without requiring the addition of magnetic cores. In all cases a simple toroidal magnetic core structure is not precluded. In all cases splitting or adding magnetic windings is required, and, in many cases, additional capacitors are required. Many new circuits formed by applying the synthesis methods are revealed. The results achieved by application of the synthesis methods include zero ripple current at all terminals without adding magnetic cores or requiring a complex magnetic circuit element, cancellation of common mode currents, improved control loop bandwidth, and faster transient response.

摘要翻译： 揭示了五种电路合成方法，用于形成具有增强的电磁兼容性的新功率转换电路以及具有AC性能和/或电磁兼容性缺陷的旧电路的改进的AC性能。 新的合成方法可以实现性能改进，而无需添加磁芯。 在所有情况下，不排除简单的环形磁芯结构。 在所有情况下都需要拆分或添加磁绕组，并且在许多情况下需要额外的电容器。 揭示了应用合成方法形成的许多新电路。 通过应用合成方法实现的结果在所有端子处都不包括零纹波电流，而不需要添加磁芯或需要复杂的磁路元件，消除共模电流，提高控制环带宽和更快的瞬态响应。

公开(公告)号：US5402329A

公开(公告)日：1995-03-28

申请号：US988438

申请日：1992-12-09

申请人： Ernest H. Wittenbreder, Jr.

发明人： Ernest H. Wittenbreder, Jr.

IPC分类号： H02M3/335

CPC分类号： H02M3/33576 ,  Y02B70/1433

摘要： The power converter of this invention accomplishes zero voltage switching at both turn on and turn off transitions of a primary switch (206). A transformer (218) serves as both energy storage device and isolation mechanism. Inductance (216) placed in series with transformer (218) provides energy to drive the turn on resonant switching transition of switch (206). Additional energy storage is provided by a required primary side filter capacitor (220) and an output filter capacitor (224). During a first operational state in which switch (206) conducts, energy is transferred from power source (202) to transformer (218) and capacitor (220). During the first state, capacitor (224) supports a load (226). During a second operational state, a second primary switch (212) and a secondary switch (234) conduct and energy is transferred from capacitor (220) and transformer (218) to series inductance (216), capacitor (224) and load (226). The resonant transition from the first state to the second state is driven by some combination of stored energy in transformer (218) and inductor (216). The AC magnetizing currents and AC magnetic fields of transformer (218) can be made smaller than the average magnetizing current and the average magnetic field, respectively, and the converter can accomplish zero voltage switching at all line and load conditions.

摘要翻译： 本发明的功率转换器在主开关（206）的导通和关断转换两者之间实现零电压切换。 变压器218用作能量存储装置和隔离机构。 与变压器（218）串联布置的电感（216）提供能量来驱动开关（206）的谐振切换转换的转弯。 额外的能量存储由所需的一次侧滤波电容器（220）和输出滤波电容器（224）提供。 在开关（206）导通的第一操作状态期间，能量从电源（202）传送到变压器（218）和电容器（220）。 在第一状态期间，电容器（224）支撑负载（​​226）。 在第二操作状态期间，第二初级开关（212）和次级开关（234）导通，能量从电容器（220）和变压器（218）传递到串联电感（216），电容器（224）和负载（226） ）。 从第一状态到第二状态的谐振转变由变压器（218）和电感器（216）中存储的能量的一些组合驱动。 变压器（218）的交流磁化电流和交流磁场分别可以比平均磁化电流和平均磁场小，转换器可以在所有线路和负载条件下完成零电压开关。