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公开(公告)号：US5592371A
公开(公告)日：1997-01-07
申请号：US443214
申请日：1995-05-17
CPC分类号： H02M7/4826
摘要： A DC Link for use with a multi-phase DC to AC converter provides soft-switch opportunities to the main inverter devices only when such opportunities are required. A quasi-resonant rail swings from source to ground potential either with or without the assistance of an auxiliary switch. The quasi-resonant rail swings from ground to source potential with the assistance of an auxiliary switch. Low switch stresses are characteristic in both the main inverter switch devices and the DC link switch devices. Main power is carried predominantly through a DC link switch thereby minimizing power handling requirements of DC link reactive components.
摘要翻译： 与多相直流到交流转换器一起使用的直流母线仅在需要这些机会时才向主逆变器装置提供软开关机会。 准谐振轨从源极到地电位摆动，无论辅助开关是否有辅助。 在辅助开关的帮助下，准谐振轨从地电位摆动到电位。 主开关器件和直流母线开关器件都具有低开关应力。 主电源主要通过直流链路开关进行传输，从而最大程度地降低直流母线无功元件的功率处理要求。
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公开(公告)号：US6005783A
公开(公告)日：1999-12-21
申请号：US105806
申请日：1998-06-26
IPC分类号： H02M7/529 , H02M7/5395 , H02M3/36
CPC分类号： H02M7/529 , H02M7/5395 , H02M2007/53876
摘要： A three-phase invertor and control is disclosed for synthesizing low harmonic content AC voltage in the non-linear, or overmodulation, region of inverter operation. A field orientation control provides a reference voltage vector representing the desired AC output voltage in magnitude and angle. Three state, two state, and step inverter operations are used individually and in combinations in accordance with magnitude and angle parameters of the reference voltage vector.
摘要翻译： 公开了用于在逆变器操作的非线性或过调制区域中合成低谐波含量AC电压的三相逆变器和控制。 场定向控制提供表示期望的AC输出电压的参考电压矢量的大小和角度。 根据参考电压矢量的大小和角度参数，单独使用三态，二态和逐步逆变器操作。
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公开(公告)号：US5594634A
公开(公告)日：1997-01-14
申请号：US443306
申请日：1995-05-17
CPC分类号： H02M5/4585 , H02M7/4826 , Y02B70/145
摘要： A DC Link for use with a multi-phase DC to AC converter provides soft-switch opportunities to the main inverter devices only when such opportunities are required. A quasi-resonant rail swings from source to ground potential either with or without the assistance of an auxiliary switch. The quasi-resonant rail swings from ground to source potential with the assistance of an auxiliary switch. Low switch stresses are characteristic in both the main inverter switch devices and the DC link switch devices. Main power is carried predominantly through a DC link switch thereby minimizing power handling requirements of DC link reactive components.
摘要翻译： 与多相直流到交流转换器一起使用的直流母线仅在需要这些机会时才向主逆变器装置提供软开关机会。 准谐振轨从源极到地电位摆动，无论辅助开关是否有辅助。 在辅助开关的帮助下，准谐振轨从地电位摆动到电位。 主开关器件和直流母线开关器件都具有低开关应力。 主电源主要通过直流链路开关进行传输，从而最大程度地降低直流母线无功元件的功率处理要求。
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公开(公告)号：US06411534B1
公开(公告)日：2002-06-25
申请号：US09874785
申请日：2001-06-05
IPC分类号： H02M324
CPC分类号： H02M1/32 , H02M3/33569 , H02M3/33592 , H02M2007/2195 , Y02B70/1408 , Y02B70/1475
摘要： Control methods for operating a power converter circuit, consisting of a full bridge DC/DC converter stage and a full bridge DC/AC inverter stage, for use in automobiles and other vehicles. The DC/DC converter is operated by pulse width modulation and by “soft switching” and “synchronous switching” which involves turning MOSFET switches OFF and ON at strategic times to gain improvements in system performance. The DC/DC converter is also operated at a relatively high and relatively constant duty cycle, and is controlled in such a way as to make the output operate as a current source. The DC/AC inverter has a cycle by cycle overload current protection scheme.
摘要翻译： 用于运行电力转换器电路的控制方法，由全桥DC / DC转换器级和全桥DC / AC逆变器级组成，用于汽车和其他车辆。 DC / DC转换器通过脉冲宽度调制和“软开关”和“同步开关”工作，这涉及在战略时间关闭和关闭MOSFET开关，从而提高系统性能。 DC / DC转换器也以相对高且相对恒定的工作周期工作，并且以使得输出作为电流源工作的方式被控制。 DC / AC逆变器具有逐周期过载电流保护方案。
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5.发明授权Electrical power system with high-density pulse width modulated (PWM) rectifier 有权具有高密度脉宽调制（PWM）整流器的电力系统公开(公告)号：US08570774B2
公开(公告)日：2013-10-29
申请号：US12511859
申请日：2009-07-29
申请人： Ruxi Wang , Fred Wang , Rolando Burgos , Dushan Boroyevich , Kaushik Rajashekara , Stephen A. Long
发明人： Ruxi Wang , Fred Wang , Rolando Burgos , Dushan Boroyevich , Kaushik Rajashekara , Stephen A. Long
IPC分类号： H02M1/12
摘要： An electrical power system includes an alternating current (AC) power source configured to output an AC signal, a single phase pulse-width modulated (PWM) rectifier coupled to the AC power source and to an electrical load; a DC link capacitor coupled in parallel to the load and the PWM rectifier; and an active ripple energy storage circuit. The active ripple energy storage circuit has a first terminal, a second terminal and a third terminal, the active ripple energy storage circuit being coupled in parallel to the electrical load, the PWM rectifier and the DC link capacitor via the first terminal and the second terminal, the third terminal being coupled to the second terminal, the active ripple energy storage circuit being configured to selectively absorb and discharge at least part of the ripple energy.
摘要翻译： 电力系统包括被配置为输出AC信号的交流（AC）电源，耦合到AC电源和电负载的单相脉宽调制（PWM）整流器; 与负载和PWM整流器并联耦合的直流链路电容器; 和一个有源纹波储能电路。 主动波纹能量存储电路具有第一端子，第二端子和第三端子，主动纹波能量存储电路经由第一端子和第二端子并联耦合到电气负载，PWM整流器和DC链路电容器 ，所述第三端子耦合到所述第二端子，所述有源纹波能量存储电路被配置为选择性地吸收和放电至少部分所述纹波能量。
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6.发明申请ELECTRICAL POWER SYSTEM WITH HIGH-DENSITY PULSE WIDTH MODULATED (PWM) RECTIFIER 有权具有高密度脉冲宽度调制（PWM）整流器的电力系统公开(公告)号：US20100027304A1
公开(公告)日：2010-02-04
申请号：US12511859
申请日：2009-07-29
申请人： Ruxi Wang , Fred Wang , Rolando Burgos , Dushan Boroyevich , Kaushik Rajashekara , Stephen A. Long
发明人： Ruxi Wang , Fred Wang , Rolando Burgos , Dushan Boroyevich , Kaushik Rajashekara , Stephen A. Long
IPC分类号： H02M7/04
摘要： An electrical power system includes an alternating current (AC) power source configured to output an AC signal, a single phase pulse-width modulated (PWM) rectifier coupled to the AC power source and to an electrical load; a DC link capacitor coupled in parallel to the load and the PWM rectifier; and an active ripple energy storage circuit. The active ripple energy storage circuit has a first terminal, a second terminal and a third terminal, the active ripple energy storage circuit being coupled in parallel to the electrical load, the PWM rectifier and the DC link capacitor via the first terminal and the second terminal, the third terminal being coupled to the second terminal, the active ripple energy storage circuit being configured to selectively absorb and discharge at least part of the ripple energy
摘要翻译： 电力系统包括被配置为输出AC信号的交流（AC）电源，耦合到AC电源和电负载的单相脉宽调制（PWM）整流器; 与负载和PWM整流器并联耦合的直流链路电容器; 和一个有源纹波储能电路。 主动波纹能量存储电路具有第一端子，第二端子和第三端子，主动纹波能量存储电路经由第一端子和第二端子并联耦合到电气负载，PWM整流器和DC链路电容器 ，所述第三端子耦合到所述第二端子，所述有源纹波能量存储电路被配置为选择性地吸收和放电所述纹波能量的至少一部分
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公开(公告)号：US20060057442A1
公开(公告)日：2006-03-16
申请号：US11266987
申请日：2005-11-04
申请人： John Noetzel , Karl Haltiner , Kaushik Rajashekara
发明人： John Noetzel , Karl Haltiner , Kaushik Rajashekara
CPC分类号： H01M8/04365 , B60L11/1881 , B60L11/1892 , B60L11/1894 , H01M8/04559 , H01M8/04589 , H01M8/04947 , Y02T90/34 , Y10S429/90
摘要： A method of operating a fuel cell includes the step of selectively connecting and disconnecting the fuel cell to at least one electrical load dependent at least in part upon at least one of a fuel cell voltage, a fuel cell current and a fuel cell temperature.
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公开(公告)号：US20050266282A1
公开(公告)日：2005-12-01
申请号：US10855601
申请日：2004-05-27
申请人： John Noetzel , Kaushik Rajashekara , Harry Husted
发明人： John Noetzel , Kaushik Rajashekara , Harry Husted
CPC分类号： H01M8/0612 , H01M8/04007 , H01M8/04089 , H01M8/04298 , H01M2250/20 , Y02T90/32
摘要： A fuel cell system in accordance with the invention includes a single, central electronic controller (CPU) for controlling at least the Air Handling sub-system, the Reformer sub-system, the Power Electronics sub-system, and the Customer Interface sub-system. The central controller provides a central location for easier serviceability; increases data transport efficiency by eliminating lengthy links between distributed controllers; eliminates the need for multiple mechanical enclosures; allows for controller thermo conditioning in one mechanical enclosure; and reduces parasitic power losses by employing a single power supply.
摘要翻译： 根据本发明的燃料电池系统包括用于至少控制空气处理子系统，重整器子系统，电力电子子系统和客户接口子系统的单个中央电子控制器（CPU） 。 中央控制器提供了便于维修的中心位置; 通过消除分布式控制器之间的冗长链接来提高数据传输效率; 消除了对多个机械外壳的需要; 允许在一个机械外壳中进行控制器热调节; 并通过采用单个电源来减少寄生功率损耗。
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9.发明申请公开(公告)号：US20050196659A1
公开(公告)日：2005-09-08
申请号：US10793303
申请日：2004-03-04
申请人： Malcolm Grieve , John MacBain , Kaushik Rajashekara , Gregory Alexander , Brett Buck , Daniel Richey
发明人： Malcolm Grieve , John MacBain , Kaushik Rajashekara , Gregory Alexander , Brett Buck , Daniel Richey
CPC分类号： H01M8/04097 , F02C1/05 , F02C1/08 , F05D2220/60 , H01M8/04022 , H01M8/0612 , H01M2250/407 , Y02E20/16 , Y02E60/563
摘要： A system for co-generation of electricity combining a hydrocarbon catalytic reformer, an SOFC assembly and a generator driven by a gas turbine. The fuel cell assembly recycles a high percentage of anode exhaust gas into the reformer. Oxygen for reforming is derived from water in an endothermic process. The stack exit temperature is normally above 800° C. DC power from the fuel cell assembly and AC power from the gas turbine generator are directed to a power conditioner. Anode exhaust gas including carbon monoxide and hydrogen is divided into a plurality of portions by which heat may be added to the reforming, gas turbine, and cathode air heating processes. Water may be recovered from the exhaust. A power system in accordance with the invention is capable of operating at a higher total efficiency than either the fuel cell component or the gas turbine component alone.
摘要翻译： 一种用于共同生成电力的系统，其组合烃催化重整器，SOFC组件和由燃气轮机驱动的发电机。 燃料电池组件将高百分比的阳极废气再循环到重整器中。 用于重整的氧气是在吸热过程中来自水。 堆叠出口温度通常高于800℃。来自燃料电池组件的直流电力和来自燃气涡轮发电机的AC电力被引导到功率调节器。 包括一氧化碳和氢的阳极废气被分成多个部分，通过该部分可以向重整燃气轮机和阴极空气加热过程加热。 水可以从废气中回收。 根据本发明的电力系统能够以比燃料电池部件或燃气轮机部件单独地更高的总效率运行。
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公开(公告)号：US06321145B1
公开(公告)日：2001-11-20
申请号：US09771532
申请日：2001-01-29
申请人： Kaushik Rajashekara
发明人： Kaushik Rajashekara
IPC分类号： B60L1101
CPC分类号： B60L11/1881 , B60L2210/12 , B60L2210/14 , Y02T10/7225 , Y02T10/7233 , Y02T90/34 , Y10S429/90
摘要： Propulsion control system and method are provided for use in vehicles including a propulsion motor that is powered by a fuel cell. The fuel cell unit produces a compatible voltage for the propulsion motor, thereby removing the need for a dc/dc boost converter. A buck/boost converter and a standard 12 volt battery are used to start the fuel cell. An inverter receives dc electric voltage from the fuel cell and outputs ac electric voltage to the propulsion motor. A vehicle controller receives a voltage input from the fuel cell unit and outputs a current reference to a comparing device. The comparing device compares the current reference from the vehicle controller to an actual current of the fuel cell unit and then outputs a signal to a PI control which outputs a control signal to a fuel cell controller, whereby the power output of the fuel cell is controlled based on the actual current of the fuel cell.
摘要翻译： 提供用于包括由燃料电池供电的推进电动机的车辆中的推进控制系统和方法。 燃料电池单元为推进电机产生兼容的电压，从而消除了对直流/直流升压转换器的需要。 使用降压/升压转换器和标准的12伏电池来启动燃料电池。 逆变器从燃料电池接收直流电压，并向推进电动机输出交流电压。 车辆控制器接收从燃料电池单元输入的电压，并将电流基准输出到比较装置。 比较装置将来自车辆控制器的当前参考值与燃料电池单元的实际电流进行比较，然后将信号输出到向控制信号输出到PI控制器，由此控制燃料电池的功率输出 基于燃料电池的实际电流。
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