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1. 发明授权

US5852558A Method and apparatus for reducing common mode voltage in multi-phase power converters 失效
标题翻译：降低多相功率转换器中共模电压的方法和装置
公开(公告)号：US5852558A
公开(公告)日：1998-12-22
申请号：US880096
申请日：1997-06-20
申请人： Alexander L. Julian , Thomas A. Lipo , Deepakraj M. Divan
发明人： Alexander L. Julian , Thomas A. Lipo , Deepakraj M. Divan
IPC分类号： H02M1/12 , H02M7/5387
CPC分类号： H02M1/12 , H02M7/5387
摘要： Multi-phase power is provided to a load via the use of an inverter which has an even number of inverter legs. DC source voltage, such as from an AC-to-DC converter receiving power from a main AC power supply or from an independent DC power source such as a battery, is provided to the inverter. The DC source voltage is provided on DC bus lines of the inverter so as to be symmetric about ground. Switching devices in the inverter legs are controlled using a modulation strategy to synthesize desired output voltage waveforms on the inverter leg outputs from the voltage on the DC bus lines. The modulation strategy is subject to a modulation constraint such that, at any one time, half of the inverter legs provide a positive output voltage signal with respect to ground, and the other half of the inverter legs provide a negative output voltage signal, of equal magnitude, with respect to ground. If the multi-phase load to which the inverter is connected is a balanced impedance, the present invention makes possible the reduction or elimination of common mode voltage and, therefore, common mode current. Load balancing may be achieved using a multi-phase second order filter connected between the inverter leg outputs and the load. The present invention may be applied to power conversion systems including hard switching or soft switching inverters, and may be used in combination with conventional inverter modulation strategies.
摘要翻译：通过使用具有偶数个逆变器支路的逆变器向负载提供多相电源。直流源电压，例如从接收来自主交流电源的电力或从电池等独立的直流电源接收电力的交流 - 直流变换器被提供给逆变器。在逆变器的直流母线上设置直流电源电压，使其对地对称。使用调制策略来控制逆变器支路中的开关器件，以从DC总线上的电压合成反相器支脚输出端的期望输出电压波形。调制策略受到调制约束，使得在任何一个时间，一半的反相器支路提供相对于地的正输出电压信号，而另一半的反相器支路提供相等的负输出电压信号相对于地面。如果逆变器连接的多相负载是平衡阻抗，则本发明可以降低或消除共模电压，从而降低共模电流。可以使用连接在逆变器支脚输出和负载之间的多相二阶滤波器来实现负载平衡。本发明可以应用于包括硬开关或软开关逆变器的功率转换系统，并且可以与传统的逆变器调制策略结合使用。

2. 发明授权

US6108223A IGBT-controlled thyristor AC/DC converter 失效
标题翻译： IGBT控制晶闸管AC / DC转换器
公开(公告)号：US6108223A
公开(公告)日：2000-08-22
申请号：US427470
申请日：1999-10-26
申请人： Alexander L. Julian , Giovanna Oriti
发明人： Alexander L. Julian , Giovanna Oriti
IPC分类号： H02M7/12 , H02M7/06 , H02M7/162 , H02M7/21 , H02M7/797 , H02M7/155
CPC分类号： H02M7/21 , H02M7/1623
摘要： A hybrid diode/thyristor AC/DC converter includes a thyristor bridge (21) poled oppositely to a diode bridge (13), current through the thyristor bridge being controlled by IGBTs (30, 31). A thyristor turn-off circuit (40-42, 45-47) is responsive to turn-off of the IGBT to reverse bias the thyristors, thereby causing them to turn off. The thyristors and IGBTs are controlled (50) in response to voltage (55-57) of and current flowing (51-53) in the AC mains so as to cause the current flowing to or from the AC mains to be more nearly sinusoidal. The hybrid bridge handles application of regenerative power to the AC mains.
摘要翻译：混合二极管/晶闸管AC / DC转换器包括与二极管电桥（13）相反极化的晶闸管桥（21），通过晶闸管桥的电流由IGBT（30,31）控制。晶闸管关断电路（40-42,45-47）响应关断IGBT以反向偏置晶闸管，从而使它们断开。响应于交流电源中的电流（55-57）和电流（51-53），晶闸管和IGBT被控制（50），以便使流过或来自AC电源的电流更接近正弦。混合桥梁可以处理对交流电源的再生电力的应用。

3. 发明授权

US6137703A Clamped bidirectional power switches 有权
标题翻译：夹紧双向电源开关
公开(公告)号：US6137703A
公开(公告)日：2000-10-24
申请号：US447651
申请日：1999-11-23
申请人： Alexander L. Julian , Joseph DiTucci
发明人： Alexander L. Julian , Joseph DiTucci
IPC分类号： H02M7/162 , H03K17/0814 , H03K17/567 , H03K17/687 , H02M7/155
CPC分类号： H02M7/162 , H03K17/08148 , H03K17/567 , H03K17/6874
摘要： A bidirectional solid state power switch module includes two solid state switches, each having an antiparallel diode, connected in common electrode configuration by a juncture therebetween. A pair of unilaterally conductive paths, each poled to conduct in a direction to maintain current through the switch module which is cut off by turning off the adjacent switch, each connected to an extreme end of the switch module, the other end of said first unilaterally conductive paths being connected together to a first side of a capacitor, the opposite end of the capacitor being connected through a unilaterally conductive path to the juncture between the two switches, said second unilaterally conductive path being poled to conduct current that passes through either of said first paths and said capacitor. Upon cutoff of one of said switches, current flows through one of said first unilaterally conductive paths, said capacitor, and said second unilaterally conductive path and through the antidiode of the other of said switches. Since the voltage across the capacitor is always opposite to the conductivity of the unilaterally conductive paths with which it is in series, the capacitor of one such clamp can be connected in parallel with the capacitor of other clamps, and the voltage thereacross regulated by a single regulator, such as a resistor fed through a solid state switch controlled by a threshold detector.
摘要翻译：双向固态功率开关模块包括两个固态开关，每个固态开关具有反并联二极管，它们之间的接合部以公共电极配置连接。一对单向导电路径，每个极化地导向以保持电流通过开关模块的方向，该开关模块通过关闭相邻开关而被切断，每个开关连接到开关模块的末端，所述第一单向的另一端导电路径连接到电容器的第一侧，电容器的相对端通过单向导电路径连接到两个开关之间的接合处，所述第二单向导电路径被极化以传导电流，该电流穿过所述第一路径和所述电容器。当所述开关中的一个断开时，电流流过所述第一单向导电路径，所述电容器和所述第二单向导电路径中的一个并且通过所述开关中的另一个的抗二极管。由于电容器两端的电压总是与串联的单向导电通路的电导率相反，所以一个这样的钳位电容器可以与其他钳位电容器并联，并且电压由一个单一的调节器，例如通过由阈值检测器控制的固态开关馈送的电阻器。

4. 发明授权

US6130832A Active filtering of AC/DC switched converter input current 有权
标题翻译：有源滤波AC / DC开关变换器输入电流
公开(公告)号：US6130832A
公开(公告)日：2000-10-10
申请号：US435584
申请日：1999-11-08
申请人： Alexander L. Julian
发明人： Alexander L. Julian
IPC分类号： H02J3/01 , H02J3/18 , H02M1/12 , H02M7/219 , H02M7/217
CPC分类号： H02J3/01 , H02J3/1814 , H02M1/12 , H02M7/219 , Y02E40/18 , Y02E40/40
摘要： An active inductor for controlling transistor bridge switching carrier frequency current components in the power mains connected to a three-phase AC/DC switched bridge converter includes a transformer for each phase, each having a secondary between the AC main and the switched bridge, the primary of which is driven by a bridge switched at much higher frequency in response to a synthesized waveform which ideally will completely cancel the main power bridge switching current components. Reduction of the current carrying requirement of the active inductor is achieved by providing negative feedback of the fundamental power frequency from the primary of each transformer; deviations in the synthesized waveform from the ideal waveform, due to delays and distortions in real circuits and/or processing, are reduced by providing negative feedback from the resultant current (the secondary of the active filter transformer).
摘要翻译：用于控制连接到三相AC / DC开关桥式变换器的电源中的晶体管桥式开关载波频率电流分量的有源电感器包括用于每相的变压器，每个相位具有AC主交换桥和交换桥之间的次级，其由响应于理想地将完全抵消主电力电桥开关电流分量的合成波形以高得多的频率切换的桥驱动。通过从每个变压器的初级提供基本功率频率的负反馈来实现有源电感器的电流承载要求的降低; 通过从合成电流（有源滤波变压器的次级）提供负反馈，减少了由于实际电路和/或处理中的延迟和失真导致的合成波形与理想波形的偏差。

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