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公开(公告)号：US20060244428A1
公开(公告)日：2006-11-02
申请号：US10545567
申请日：2003-02-11
申请人： Ionel Jitaru , George Casaru
发明人： Ionel Jitaru , George Casaru
IPC分类号： G05F1/00
CPC分类号： H02M1/34 , H02M3/155 , H02M2001/342 , H02M2001/344 , H03K17/04 , H03K17/0814 , H03K17/687 , H03K17/74 , Y02B70/1491
摘要： An improved snubber is electrically switched to close a current path to a capacitor (C) in a series connected RC circuit at the onset of an abrupt voltage change otherwise producing ringing in a resonant circuit to which the snubber circuit is connected. The current path to the capacitor (C) is then interrupted before the capacitor (C) discharges and thereafter at each such voltage change in the resonant circuit the capacitor (C) is no longer charged from its totally discharged state but nevertheless damps the ringing by virtue of current flow to the nearly completely charged capacitor (C). By preventing complete charging and discharging of the capacitor (C) in the RC circuit every cycle, power dissipation in the resistance of the snubber circuit is greatly reduced.
摘要翻译： 改进的缓冲器电开关以在突发电压变化开始时闭合串联RC电路中的电容器（C）的电流路径，否则在缓冲电路连接到的谐振电路中产生振铃。 电容器（C）的电流路径然后在电容器（C）放电之前中断，此后在谐振电路中的每个这样的电压变化下，电容器（C）从其完全放电状态不再被充电，但是仍然通过 电流流过几乎完全充电的电容器（C）。 通过每个周期防止RC电路中的电容器（C）完全充放电，缓冲电路电阻的功耗大大降低。
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公开(公告)号：US07092259B2
公开(公告)日：2006-08-15
申请号：US11119110
申请日：2005-04-29
申请人： Mark E. Jacobs
发明人： Mark E. Jacobs
IPC分类号： H02M3/335
CPC分类号： H02M1/34 , H02M3/33569 , H02M2001/342 , H02M2001/344 , Y02B70/1433 , Y02B70/1491
摘要： A dc-dc converter is disclosed comprising an active clamp topology, including an active clamp resonant transition system to provide substantially zero or reduced voltage for turn-on of the primary switch. The resonant transition system includes an inductor in series with the primary winding of the power transformer and a clamp diode that operate cooperatively to turn on the primary switch with reduced voltage. A second diode is included in series with a balancing resistor to discharge a snubber capacitor with improved efficiency. The addition of these circuit components provides low switching losses and low component stresses in the overall design.
摘要翻译： 公开了一种DC-DC转换器，其包括有源钳位拓扑，其包括用于为主开关的导通提供基本为零或降低的电压的有源钳位谐振转换系统。 谐振转移系统包括与电力变压器的初级绕组串联的电感器和钳位二极管，其协作地工作以在降低的电压下接通初级开关。 与平衡电阻器串联包括第二个二极管，以提高效率来放电缓冲电容器。 这些电路元件的添加在整体设计中提供了低开关损耗和低元件应力。
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公开(公告)号：US06903944B2
公开(公告)日：2005-06-07
申请号：US10435410
申请日：2003-05-09
申请人： Mark E. Jacobs
发明人： Mark E. Jacobs
CPC分类号： H02M1/34 , H02M3/33576 , H02M2001/342 , H02M2001/344 , Y02B70/1433 , Y02B70/1491
摘要： A DC—DC converter is disclosed comprising an active clamp topology, including an active clamp resonant transition system to provide substantially zero or reduced voltage for turn-on of the primary switch. The resonant transition system includes an inductor in series with the primary winding of the power transformer and a clamp diode that operate cooperatively to turn on the primary switch with reduced voltage. The addition of these circuit components provides lower switching losses and lower component stresses in the overall design.
摘要翻译： 公开了一种DC-DC转换器，其包括有源钳位拓扑结构，其包括用于为初级开关的导通提供基本为零或降低的电压的有源钳位谐振转换系统。 谐振转移系统包括与电力变压器的初级绕组串联的电感器和钳位二极管，其协作地工作以在降低的电压下接通初级开关。 这些电路元件的添加在总体设计中提供较低的开关损耗和较低的元件应力。
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公开(公告)号：US20050036343A1
公开(公告)日：2005-02-17
申请号：US10949413
申请日：2004-09-23
申请人： Arthur Odell
发明人： Arthur Odell
CPC分类号： H02M1/34 , H02M3/335 , H02M3/33569 , H02M2001/344
摘要： Dissipative clamping apparatuses and methods for electrical circuits. In one aspect of the invention, In one aspect of the invention, a method includes switching a power supply input on an energy transfer element, regulating a power supply output by switching the power supply input on the energy transfer element, clamping a voltage on the energy transfer element to a clamp voltage and varying the clamp voltage in response to the power supply input. In another aspect, an electrical circuit includes a dissipative clamp circuit coupled to an input of the electrical circuit. An inductive element is coupled between the dissipative clamp circuit and an output of the electrical circuit. A switch is coupled in series with the inductive element. The dissipative clamp circuit is coupled to provide a clamp voltage across the inductive element, the clamp voltage is provided by the dissipative clamp circuit responsive to conditions at the input of the electrical circuit, the dissipative clamp circuit is coupled to maintain a voltage across the switch below a switch voltage limit.
摘要翻译： 用于电路的耗散夹紧装置和方法。 在本发明的一个方面，在本发明的一个方面，一种方法包括切换能量传递元件上的电源输入，通过切换能量传递元件上的电源输入来调节电源输出，钳位电压 能量传递元件到钳位电压并响应于电源输入而改变钳位电压。 在另一方面，电路包括耦合到电路输入的耗散钳位电路。 电感元件耦合在耗散钳位电路和电路的输出之间。 开关与电感元件串联耦合。 耗散钳位电路被耦合以在电感元件上提供钳位电压，钳位电压由消耗钳位电路提供，响应于电路输入端的条件，耗散钳位电路被耦合以保持开关两端的电压 低于开关电压限制。
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公开(公告)号：US20040100806A1
公开(公告)日：2004-05-27
申请号：US10717943
申请日：2003-11-20
发明人： Arthur B. Odell
IPC分类号： H02H007/122
CPC分类号： H02M1/34 , H02M3/335 , H02M3/33569 , H02M2001/344
摘要： Dissipative clamping apparatuses and methods for electrical circuits. In one aspect of the invention, In one aspect of the invention, a method includes switching a power supply input on an energy transfer element, regulating a power supply output by switching the power supply input on the energy transfer element, clamping a voltage on the energy transfer element to a clamp voltage and varying the clamp voltage in response to the power supply input. In another aspect, an electrical circuit includes a dissipative clamp circuit coupled to an input of the electrical circuit. An inductive element is coupled between the dissipative clamp circuit and an output of the electrical circuit. A switch is coupled in series with the inductive element. The dissipative clamp circuit is coupled to provide a clamp voltage across the inductive element, the clamp voltage is provided by the dissipative clamp circuit responsive to conditions at the input of the electrical circuit, the dissipative clamp circuit is coupled to maintain a voltage across the switch below a switch voltage limit.
摘要翻译： 用于电路的耗散夹紧装置和方法。 在本发明的一个方面，在本发明的一个方面，一种方法包括切换能量传递元件上的电源输入，通过切换能量传递元件上的电源输入来调节电源输出，钳位电压 能量传递元件到钳位电压并响应于电源输入而改变钳位电压。 在另一方面，电路包括耦合到电路输入的耗散钳位电路。 电感元件耦合在耗散钳位电路和电路的输出之间。 开关与电感元件串联耦合。 耗散钳位电路被耦合以在电感元件上提供钳位电压，钳位电压由消耗钳位电路提供，响应于电路输入端的条件，耗散钳位电路被耦合以保持开关两端的电压 低于开关电压限制。
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公开(公告)号：US5003451A
公开(公告)日：1991-03-26
申请号：US454489
申请日：1989-12-21
申请人： David A. Gradl , Stephen M. Henning
发明人： David A. Gradl , Stephen M. Henning
IPC分类号： H02M1/34 , H02M3/335 , H03K17/00 , H03K17/0814
CPC分类号： H02M1/34 , H02M3/33569 , H03K17/08142 , H02M2001/344 , H03K2217/0036
摘要： A damper circuit for switching power supplies to improve the stability thereof with high efficiency. A resistor, having a value which critically damps the flyback transformer in the supply, is selectively coupled to the transformer by a switch when the switching transistor is disabled. The decoupling of the resistor when the switching transistor is on reduces power dissipation, compared to passive damping techniques, and allows integration of the damper onto the same IC as the control circuits of the supply. The damper increases the stability of the supply by absorbing excess energy not transferred to the load. The excess energy would instead be dissipated in the transistor and upsetting the control circuits of the supply, leading to instability of thereof. In addition, a clamp circuit is provided which keeps the switch from turning on due to high slew rate transients across the transformer from the turn-on of the switching transistor.
摘要翻译： 一种用于切换电源以便以高效率提高其稳定性的阻尼电路。 当开关晶体管被禁止时，具有严重阻碍电源中的回扫变压器的值的电阻器通过开关选择性地耦合到变压器。 与被动阻尼技术相比，开关晶体管导通时电阻器的去耦可以减少功耗，并且可以将阻尼器与电源的控制电路集成在同一个IC上。 阻尼器通过吸收未传递到负载的过量能量来增加电源的稳定性。 反过来，会在晶体管中消耗多余的能量，并使供电的控制电路瘫痪，导致其不稳定。 另外，还提供一个钳位电路，由于开关晶体管的导通，跨越变压器的高转换速率瞬变使得开关不会导通。
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公开(公告)号：US10056774B2
公开(公告)日：2018-08-21
申请号：US15107619
申请日：2014-02-06
发明人： Toru Daigo , Nobuhiro Kihara , Yuji Kuramoto
CPC分类号： H02J7/0068 , H02J7/0072 , H02M1/34 , H02M2001/344
摘要： A discharge device provided with a switching unit configured by a first switch element and a second switch element connected in series, a first power storage element connected in parallel with both ends of the switching unit, a second power storage element connected in parallel with both ends of the second switch element, and a control unit which controls on/off switching of the first switch element and the second switch element in such a manner that a portion of the energy charged in the first power storage element is charged and discharged at least once by the second power storage element, and the energy charged in the first power storage element is discharged while being consumed in one or all of the first switch element and the second switch element.
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公开(公告)号：US10038370B2
公开(公告)日：2018-07-31
申请号：US15664126
申请日：2017-07-31
发明人： Richard Nicholson
CPC分类号： H02M1/44 , H02J7/02 , H02J7/022 , H02J7/027 , H02M3/158 , H02M7/217 , H02M2001/0022 , H02M2001/322 , H02M2001/344
摘要： A capacitor input circuit for a mobile power supply includes a bulk capacitor and a switch. The switch connects the bulk capacitor to receive a rectified AC voltage from a rectifier when an AC line voltage input to the mobile power supply is lower than a threshold voltage. When the AC line voltage is greater than the threshold voltage, the switch electrically floats the bulk capacitor.
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公开(公告)号：US20180166973A1
公开(公告)日：2018-06-14
申请号：US15574597
申请日：2016-05-17
CPC分类号： H02M3/156 , H02M1/34 , H02M3/33561 , H02M2001/344 , H02M2001/346 , H02M2003/1586 , Y02B70/1491
摘要： Pre-conditioners (or line-conditioners) are used to convert electrical power having first characteristics into electrical power having second characteristics. For example, a pre-conditioner may connect electrical equipment forming a load, which requiring only a conventional mains supply level to a utility three-phase supply. This means that the power components of the load may be de-rated, making the load electrical equipment cheaper. Such circuits may be further improved. Components in the down-converter itself still need to be rated to interface with the higher voltage. An approach is proposed in which two interleaved down-converters (36, 38) can be used to supply voltages. An energy recovery element (50) connects snubbers of the interleaved down-converters, thus enabling some de-rating of the pre-conditioner circuitry.
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公开(公告)号：US20180048304A1
公开(公告)日：2018-02-15
申请号：US15555835
申请日：2016-03-03
CPC分类号： H03K17/16 , H02M1/088 , H02M1/34 , H02M7/7575 , H02M2001/344 , H03K5/02 , H03K5/04 , H03K17/06 , H03K17/08144 , H03K17/105 , Y02E60/60
摘要： A semiconductor switching string including a series-connected switching assemblies. Each assembly has a main switching element including first and second connection terminals which current flows between when the main switching element is on. The main element has an auxiliary element between the connection terminals. The string includes a local control unit connected with each auxiliary element which are programmed to switch an auxiliary element to create an alternative current path between the connection terminals that diverts current through to reduce the voltage across the corresponding main switching element. The local unit is programmed to control switching an auxiliary element to a fully-on mode in which the auxiliary element is at maximum rated base current, a pulsed mode which turns the auxiliary element on and off and/or an active mode operating the auxiliary element with a continuously variable base current. The string includes a higher level control unit programmed to implement the modes.
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