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公开(公告)号：US5982646A
公开(公告)日：1999-11-09
申请号：US108043
申请日：1998-06-30
CPC分类号： H02M7/487 , H02M1/34 , H02M2001/346 , Y02B70/1491
摘要： A three-level NPC converter includes at least one phase leg including four series coupled electrical switches having a first pair junction between the first two switches and a second pair junction between the second two switches. First and second inner switch snubber capacitors are coupled in series at a neutral junction. First and second inner switch snubber diodes are respectively coupled to the first and second pair junctions and respectively coupled at first and second inner diode-capacitor junctions to the first and second inner switch snubber capacitors. First and second inner switch snubber resistors are respectively coupled between the first and second inner diode-capacitor junctions and respective portions of a DC bus. In one embodiment, the NPC converter further includes first and second outer switch snubber diodes coupled between respective first and second inner diode-capacitor junctions and respective portions of the DC bus. This embodiment may further include first and second outer switch snubber capacitors coupled in parallel with respective first and second inner switch snubber capacitors.
摘要翻译： 三电平NPC转换器包括至少一个相位支路，包括四个串联耦合的电开关，该电气开关具有在前两个开关之间的第一对结和第二个两个开关之间的第二对结。 第一和第二内部开关缓冲电容器在中性点处串联耦合。 第一和第二内部开关缓冲二极管分别耦合到第一和第二对结，并且分别在第一和第二内部二极管 - 电容器结处耦合到第一和第二内部开关缓冲电容器。 第一和第二内部开关缓冲电阻分别耦合在第一和第二内部二极管 - 电容器接头和DC总线的相应部分之间。 在一个实施例中，NPC转换器还包括耦合在相应的第一和第二内部二极管 - 电容器结之间的第一和第二外部开关缓冲二极管以及DC总线的相应部分。 该实施例还可以包括与相应的第一和第二内部开关缓冲电容器并联耦合的第一和第二外部开关缓冲电容器。
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公开(公告)号：US6058031A
公开(公告)日：2000-05-02
申请号：US108044
申请日：1998-06-30
申请人： James Patrick Lyons , Vlatko Vlatkovic , Paul Martin Espelage , Albert Andreas Maria Esser , Yifan Zhao , Fei Fred Wang, Sr.
发明人： James Patrick Lyons , Vlatko Vlatkovic , Paul Martin Espelage , Albert Andreas Maria Esser , Yifan Zhao , Fei Fred Wang, Sr.
CPC分类号： H02M7/487 , H02M7/5395 , H02P27/14
摘要： A high power motor drive converter includes: a five level hybrid NPC output power conversion stage including three NPC phase bridges having switches and coupled in a wye configuration through a converter neutral point, each NPC phase bridge receiving power on a respective direct current bus; three isolated split series-connected DC capacitor banks each coupled in parallel to a respective one of the three NPC phase bridges; and a controller for selecting switch positions with active control of neutral voltages. The controller is adapted to select switch positions using feedforward sine-triangle modulation with third harmonic injection, zero sequence injection, and/or discontinuous modulation injection.
摘要翻译： 大功率电动机驱动转换器包括：五级混合NPC输出功率转换级，包括具有开关的三个NPC相桥，并且通过转换器中性点以叶状配置耦合，每个NPC相桥在相应的直流母线上接收功率; 三个隔离的串联连接的直流电容器组，其分别与三个NPC相桥中的相应一个并联耦合; 以及用于选择具有中性电压的主动控制的开关位置的控制器。 控制器适于使用具有三次谐波注入，零序注入和/或不连续调制注入的前馈正弦三角调制来选择开关位置。
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公开(公告)号：US5910892A
公开(公告)日：1999-06-08
申请号：US108041
申请日：1998-06-30
IPC分类号： H02M7/48 , H02M7/487 , H02M7/5387
CPC分类号： H02M7/487 , H02M2007/53876
摘要： A high power motor drive converter includes a three level neutral point clamped (NPC) output power conversion stage including switches; a split series connected DC capacitor bank coupled in parallel with the NPC output power conversion stage; and a controller for selecting switch positions for controlling the NPC output power conversion stage and controlling a neutral voltage balance of the DC capacitor bank by using space vector modulation and predictive charge calculations.
摘要翻译： 大功率电动机驱动转换器包括三级中性点钳位（NPC）输出功率转换级，包括开关; 与NPC输出功率转换级并联耦合的分立串联直流电容器组; 以及用于选择用于控制NPC输出功率转换级的开关位置并通过使用空间矢量调制和预测电荷计算来控制DC电容器组的中性电压平衡的控制器。
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