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1.发明授权公开(公告)号：US07869237B1
公开(公告)日：2011-01-11
申请号：US11965327
申请日：2007-12-27
IPC分类号： H02M7/5387
CPC分类号： H02M3/33569 , H02M3/33507
摘要： A phase-shifted PWM dc-to-dc converter includes a pair of switched half-bridges defining taps. The primary of an output transformer is coupled across the taps to receive AC, and produces transformed AC which is rectified and filtered to produce the output dc. Zero-voltage-switching (ZVS) is maintained over the full range from zero load current to maximum load current by the use of an auxiliary circuit including an “inverting” second transformer having primary and secondary windings serially coupled with capacitors. The primary-capacitor serial circuit is connected between a first half-bridge tap and reference potential, and the secondary-capacitor serial circuit is connected by an inductance between second half-bridge tap and a reference potential.
摘要翻译： 一个相移PWM直流 - 直流转换器包括一对定义抽头的开关半桥。 输出变压器的主要是通过抽头耦合以接收AC，并产生变换后的AC，其被整流和滤波以产生输出dc。 通过使用包括与电容器串联耦合的初级和次级绕组的“反相”第二变压器的辅助电路，将零电压开关（ZVS）保持在从零负载电流到最大负载电流的全范围内。 一次电容串联电路连接在第一半桥抽头和参考电位之间，二次电容串联电路通过第二半桥抽头和参考电位之间的电感连接。
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公开(公告)号：US09120393B2
公开(公告)日：2015-09-01
申请号：US13314572
申请日：2011-12-08
摘要： According to an aspect of the invention, a motor drive circuit includes a first energy storage device configured to supply electrical energy, a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, a voltage inverter coupled to the bi-directional DC-to-DC voltage converter, and an input device configured to receive electrical energy from an external energy source. The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter. The coupling system has a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and has a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.
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公开(公告)号：US20130308361A1
公开(公告)日：2013-11-21
申请号：US13475186
申请日：2012-05-18
摘要： A transformer tap-changing circuit comprises an apparatus that includes a transformer comprising a secondary winding configured to inductively couple to a primary winding when a current is passed through the primary winding from an energy source, a first rectifier coupled to the secondary winding and configured to rectify a first AC voltage from the secondary winding into a first DC voltage, and a second rectifier coupled to the secondary winding and configured to rectify a second AC voltage from the secondary winding into a second DC voltage. The apparatus also includes a DC bus coupled to the first and second rectifiers and configured to receive the first and second DC voltages therefrom, wherein the first AC voltage is higher than the second AC voltage, and wherein the first DC voltage is higher than the second DC voltage.
摘要翻译： 变压器抽头改变电路包括一种装置，其包括变压器，该变压器包括次级绕组，其被配置为当电流从能量源通过初级绕组时感应耦合到初级绕组，第一整流器耦合到次级绕组并且被配置为 将来自次级绕组的第一AC电压整流为第一DC电压，以及耦合到次级绕组的第二整流器，并且被配置为将来自次级绕组的第二AC电压整流为第二DC电压。 该装置还包括耦合到第一和第二整流器并被配置为从其接收第一和第二DC电压的DC总线，其中第一AC电压高于第二AC电压，并且其中第一DC电压高于第二DC电压 直流电压。
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4.发明申请公开(公告)号：US20130234675A1
公开(公告)日：2013-09-12
申请号：US13414800
申请日：2012-03-08
IPC分类号： H02J7/16
CPC分类号： B60L11/1814 , B60L2220/54 , H02J7/022 , H02J7/041 , H02J7/045 , H02J7/1492 , Y02T10/641 , Y02T10/7005 , Y02T10/7022 , Y02T10/7033 , Y02T10/7072 , Y02T10/92 , Y02T90/127 , Y02T90/14
摘要： An apparatus for transferring energy using onboard power electronics comprises a first energy storage device configured to output a DC voltage and a DC bus coupled to the first energy storage device, the DC bus coupleable to a high-impedance voltage source. The apparatus also comprises a braking resistor coupled to the DC bus and to a control circuit, and a controller. The controller is configured to control the control circuit to cause on the DC bus to be dissipated through the braking resistor during a regenerative braking event, cause the first energy storage device to receive a charging energy from the high-impedance voltage source through the braking resistor during a charging event, and after a threshold value has been crossed, cause the first energy storage device to receive the charging energy from the high-impedance voltage source bypassing the braking resistor during the charging event.
摘要翻译： 一种用于使用车载电力电子装置传送能量的设备包括：第一能量存储装置，其被配置为输出耦合到所述第一能量存储装置的DC电压和DC总线，所述DC总线可耦合到高阻抗电压源。 该装置还包括耦合到DC总线和控制电路的制动电阻器以及控制器。 控制器被配置为控制控制电路在再生制动事件期间通过制动电阻器在DC总线上消散，使得第一储能装置通过制动电阻器从高阻抗电压源接收充电能量 在充电事件期间，并且在超过阈值之后，使得第一能量存储装置在充电事件期间从绕过制动电阻器的高阻抗电压源接收充电能量。
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5.发明授权Apparatus for transferring energy using onboard power electronics and method of manufacturing same 有权使用车载电力电子装置传递能量的装置及其制造方法公开(公告)号：US08487582B2
公开(公告)日：2013-07-16
申请号：US13099053
申请日：2011-05-02
CPC分类号： H02J1/10 , B60L11/1812 , B60L11/1814 , H02J7/1415 , H02J7/34 , Y02T10/7005 , Y02T10/7072 , Y02T90/127 , Y02T90/14 , Y10T307/511
摘要： An apparatus comprises a first energy storage device configured to output a DC voltage, a first bi-directional voltage modification assembly coupled to the first energy storage device, and a charge bus coupled to the first energy storage device and to the first bi-directional voltage modification assembly. The apparatus also comprises high-impedance voltage source coupleable to the charge bus and a controller configured to monitor a transfer of charging energy supplied from the high-impedance voltage source to the first energy storage device. The controller is also configured to compare the monitored transfer of charging energy with a threshold value and, after the threshold value has been crossed, control the first bi-directional voltage modification assembly to modify one of a voltage and a current of the charging energy supplied to the first energy storage device.
摘要翻译： 一种装置包括被配置为输出DC电压的第一能量存储装置，耦合到第一能量存储装置的第一双向电压修改组件以及耦合到第一能量存储装置和第一双向电压的第一双向电压 修改装配。 该装置还包括可耦合到充电总线的高阻抗电压源和被配置为监测从高阻抗电压源提供给第一能量存储装置的充电能量的传送的控制器。 控制器还被配置为将监测的充电能量的传输与阈值进行比较，并且在阈值已经被越过之后，控制第一双向电压修改组件以修改所提供的充电能量的电压和电流之一 到第一储能装置。
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公开(公告)号：US20120092898A1
公开(公告)日：2012-04-19
申请号：US13096005
申请日：2011-04-28
申请人： Ravisekhar Nadimpalli Raju , Luis Jose Garces , Robert Louis Steigerwald , Michael Joseph Schutten
发明人： Ravisekhar Nadimpalli Raju , Luis Jose Garces , Robert Louis Steigerwald , Michael Joseph Schutten
IPC分类号： H02M3/335
CPC分类号： H02M3/3376 , H02M1/4258 , H02M3/285 , H02M3/33561 , H02M3/33576 , Y02B70/126 , Y02B70/1433
摘要： An alternating current to direct current (AC to DC) power conversion system is provided. The system includes a rectifier configured to convert an input AC voltage to an initial pulsating DC voltage. The system also includes an inverter configured to convert the initial pulsating DC voltage to a converted AC voltage. The system further includes a plurality of transformers, each transformer including a primary winding paired to a secondary winding, wherein each of the primary windings is coupled in series with the other primary windings, wherein the series coupled primary windings are coupled to the inverter to receive respective portions of the converted AC voltage. The system also includes a plurality of bridges, each bridge coupled to a respective secondary winding configured to receive a respective portion of a transformed AC voltage from the respective secondary windings, and coupled in parallel to the other bridges to provide a combined DC output voltage.
摘要翻译： 提供了直流（AC-DC）电力转换系统的交流电。 该系统包括被配置为将输入AC电压转换为初始脉动直流电压的整流器。 该系统还包括被配置为将初始脉动直流电压转换为转换的交流电压的逆变器。 该系统还包括多个变压器，每个变压器包括与次级绕组成对的初级绕组，其中每个初级绕组与其它初级绕组串联耦合，其中串联耦合初级绕组耦合到逆变器以接收 转换后的交流电压的各部分。 该系统还包括多个桥，每个桥耦合到相应的次级绕组，其被配置为从相应的次级绕组接收变换的AC电压的相应部分，并联耦合到其它桥以提供组合的DC输出电压。
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公开(公告)号：US20090323379A1
公开(公告)日：2009-12-31
申请号：US12215505
申请日：2008-06-27
IPC分类号： H02M7/48
CPC分类号： H02M7/53873 , H02J3/38 , H02M1/44 , H02M2001/0048 , H02M2001/007 , Y02B70/1491
摘要： A photovoltaic (PV) inverter includes a single DC to AC converter configured to operate solely in a buck mode for PV array voltage levels greater than a connected power grid instantaneous voltage plus converter margin, and further configured to operate solely in a boost mode for PV array voltage levels plus margin less than the connected power grid instantaneous voltage, such that the PV inverter generates a rectified sine wave current in response to the available PV array power, and further such that the PV inverter generates a utility grid current in response to the rectified sine wave current.
摘要翻译： 光伏（PV）逆变器包括单个DC至AC转换器，其被配置为仅在降压模式下操作用于大于连接的电网瞬时电压加转换器裕度的光伏阵列电压电平，并且还被配置为仅在PV的升压模式下操作 阵列电压电平加上小于连接的电网瞬时电压的裕度，使得PV逆变器响应于可用的光伏阵列功率而产生整流的正弦波电流，并且还使得PV逆变器响应于 整流正弦波电流。
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公开(公告)号：USRE40907E1
公开(公告)日：2009-09-08
申请号：US11361663
申请日：2006-02-17
摘要： A low-ripple power supply includes a storage capacitor coupled across load terminals, and an inductor connected to a source of voltage including a varying or pulsatory component and a direct component, for causing a flow of current to said capacitor through the inductor. The varying component of the inductor current flowing in the capacitor results in ripple across the load. A winding is coupled to the inductor for generating a surrogate of the varying inductor current. The surrogate current is added to the inductor current to cancel or reduce the magnitude of the varying current component. This cancellation effectively reduces the varying current component flowing in the storage capacitor, which in turn reduces the ripple appearing across the load terminals.(121)
摘要翻译： 低纹波电源包括耦合在负载端子之间的存储电容器和连接到包括变化或脉动分量和直接分量的电压源的电感器，用于通过电感器引起电流流向所述电容器。 在电容器中流动的电感电流的变化分量导致负载上的纹波。 绕组耦合到电感器以产生变化的电感器电流的替代。 替代电流被加到电感电流以消除或减小变化电流分量的大小。 这种消除有效地减少了在存储电容器中流动的变化的电流分量，这反过来又减少了跨负载端子出现的波动。（121）
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9.发明授权Method/system for switched frequency ripple reduction in MRI gradient coils 失效MRI梯度线圈中开关频率纹波降低的方法/系统公开(公告)号：US06930483B2
公开(公告)日：2005-08-16
申请号：US10632283
申请日：2003-08-01
CPC分类号： G01R33/3614
摘要： A method of operating a system having a coil includes providing a switched amplified current to the coil, and adding a second current to the switched amplified current, wherein the second current is substantially out of phase with the switched amplified current such that the coil receives current with substantially no switching frequency ripple.
摘要翻译： 一种操作具有线圈的系统的方法包括向线圈提供开关放大电流，并向开关放大电流增加第二电流，其中第二电流与开关放大电流基本上不同相，使得线圈接收电流 基本上没有开关频率纹波。
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10.发明授权Switching amplifier for generating continuous arbitrary waveforms for magnetic resonance imaging coils 有权用于产生磁共振成像线圈的连续任意波形的开关放大器
公开(公告)号：US6031746A
公开(公告)日：2000-02-29
申请号：US148559
申请日：1998-09-04
申请人： Robert Louis Steigerwald , William Frederick Wirth , Ljubisa Dragolijub Stevanovic , John Norton Park
发明人： Robert Louis Steigerwald , William Frederick Wirth , Ljubisa Dragolijub Stevanovic , John Norton Park
CPC分类号： H03F3/2171
摘要： A partial-voltage buck regulator controls a high-voltage bus to a full-bridge circuit such that overall switching losses are reduced and distributed. Low-voltage buck regulator devices are PWM-switched when high output voltage is needed, and high-voltage bridge devices are PWM-switched when low output voltage is needed. A variable input power supply, which may be operated in a high power factor mode, can adjust the input bus voltages to achieve optimum performance for a given magnetic resonance imaging sequence.
摘要翻译： 部分电压降压调节器将高压总线控制到全桥电路，从而减少和分配总开关损耗。 当需要高输出电压时，低压降压稳压器件被PWM切换，当需要低输出电压时，高压桥式器件被PWM切换。 可以在高功率因数模式下操作的可变输入电源可以调节输入总线电压以实现给定磁共振成像序列的最佳性能。
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