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1. 发明授权

US6118676A Dynamic voltage sag correction 有权
标题翻译：动态电压骤降校正
公开(公告)号：US6118676A
公开(公告)日：2000-09-12
申请号：US433993
申请日：1999-11-04
申请人： Deepakraj M. Divan , Glen Luckjiff , Robert Schneider , William E. Brumsickle , William R. Kranz
发明人： Deepakraj M. Divan , Glen Luckjiff , Robert Schneider , William E. Brumsickle , William R. Kranz
IPC分类号： H02J3/18 , H02J3/28 , H02M5/458 , H02J3/00 , G05F1/70
CPC分类号： H02J3/28 , H02J3/1814 , H02M5/458 , Y02E40/18
摘要： A low cost, small size, light weight, and highly effective system and method for providing dynamic power line voltage sag correction is provided. A dynamic voltage sag corrector includes a static bypass switch and a regulator/storage module connected together in parallel between input terminals and output terminals. Under normal operating conditions, the static bypass switch is closed, and a normal line voltage level is provided directly from the input terminals to the output terminals via the static bypass switch. When a voltage sag condition is indicated, the static bypass switch is opened, and the regulator/storage module is controlled to provide a near normal output voltage signal to the output terminals. The regulator/storage module includes a power conversion circuit which is controlled to provide the desired output voltage signal by adding a voltage level on storage capacitors to the available input line voltage signal. The components of the dynamic voltage sag corrector are selected to provide voltage sag correction for a duration sufficient to provide correction of 90-95% of voltage sag/drop conditions which are likely to be encountered. The size, cost, and weight of the dynamic voltage sag corrector is thereby reduced. The dynamic voltage sag corrector may also provide surge condition correction, may be configured to provide extended duration voltage sag correction to a priority portion of a load, may provide support to a load even if there is a complete break in an input power line, and may be employed in single or multi-phase applications.
摘要翻译：提供了低成本，小尺寸，重量轻和高效的系统和方法来提供动态电力线电压骤降校正。动态电压骤降校正器包括静态旁路开关和在输入端子和输出端子之间并联连接在一起的调节器/存储模块。在正常工作条件下，静态旁路开关闭合，通过静态旁路开关直接从输入端子向输出端子提供正常的线路电压电平。当指示电压下垂条件时，静态旁路开关打开，调节器/存储模块被控制以向输出端提供接近正常的输出电压信号。调节器/存储模块包括功率转换电路，其被控制以通过将可用输入线路电压信号的存储电容器上的电压电平加上来来提供期望的输出电压信号。选择动态电压骤降校正器的组件以提供电压骤降校正，持续时间足以提供可能遇到的90-95％的电压骤降/下降条件的校正。从而减小了动态电压骤降校正器的尺寸，成本和重量。动态电压暂降校正器还可以提供浪涌状态校正，可以被配置为向负载的优先部分提供延长的持续时间电压骤降校正，即使在输入电力线中存在完全中断，也可以向负载提供支持，以及可用于单相或多相应用。

2. 发明授权

US07105952B2 Distributed floating series active impendances for power transmission systems 有权
标题翻译：电力传输系统的分布式浮动串联有源阻抗
公开(公告)号：US07105952B2
公开(公告)日：2006-09-12
申请号：US10678966
申请日：2003-10-03
申请人： Deepakraj M. Divan , Robert Schneider , William E. Brumsickle
发明人： Deepakraj M. Divan , Robert Schneider , William E. Brumsickle
IPC分类号： G05F1/66 , G05F1/07
CPC分类号： H01F30/16 , H01F38/14 , H02J3/1814 , Y02E40/18 , Y10T307/505
摘要： Floating electrically isolated active impedance modules are formed to attach to power transmission lines without breaking the lines such that the power line forms a secondary of the main transformer of the module. Each module includes an electrical energy storage device and a switching circuit, such as a single phase inverter, connected to the storage device and to the main transformer primary winding. The inverter can be controlled to couple a selected voltage to the transmission line through the main transformer primary winding which can provide effective positive impedance, negative impedance, or a voltage at or near phase quadrature with the line current. Many active impedance modules may be distributed over a power system grid to allow control of the impedance of the power lines in the grid and to steer power through the grid, with each module electrically isolated from ground and from other phase lines of the transmission system.
摘要翻译：形成浮动电隔离的有源阻抗模块以连接到电力传输线，而不破坏线路，使得电力线形成模块的主变压器的次级。每个模块包括电存储装置和连接到存储装置和主变压器初级绕组的单相逆变器的开关电路。可以通过主变压器初级绕组将所选择的电压耦合到传输线，从而可以提供有效的正阻抗，负阻抗或与线电流相位正交相近的电压。许多有源阻抗模块可以分布在电力系统电网上，以允许控制电网中的电力线路的阻抗并且通过电网引导电力，其中每个模块与地面和传输系统的其它相位线电隔离。

3. 发明授权

US07129599B2 Dual feed power supply systems with enhanced power quality 有权
标题翻译：双馈电源系统具有增强的电源质量
公开(公告)号：US07129599B2
公开(公告)日：2006-10-31
申请号：US10271330
申请日：2002-10-15
申请人： Deepakraj M. Divan , Robert Schneider , William Kranz
发明人： Deepakraj M. Divan , Robert Schneider , William Kranz
IPC分类号： H02J7/04
CPC分类号： H02J3/006 , Y04S10/525 , Y10T307/615 , Y10T307/62
摘要： Dual feed power supply system provides high reliability of a dual utility feed, with minimal interruptions in power supplied to critical loads during switching, and compensation for voltage sags occurring on the primary power feed. AC input buses are connected through a transfer switching apparatus to phase lines of a distribution bus. The transfer switching apparatus has a first input terminal connected to one of the phase lines of the first input bus and a second input terminal connected to one of the phase lines of the second input bus, and an output terminal connected to one of the phase lines of the distribution bus. Input switches allow switching from one or the other of the AC input buses to the distribution bus, with a fast transfer switch used to interrupt the supply of power from the input buses to the distribution bus during switching of the input switches.
摘要翻译：双馈电源系统提供双重效用馈电的高可靠性，在开关期间对关键负载提供的电力中断最小，以及对主电源上发生的电压骤降的补偿。交流输入总线通过转接开关装置连接到分配总线的相线。转移开关装置具有连接到第一输入总线的一条相线的第一输入端和连接到第二输入总线的相线之一的第二输入端，以及连接到相线之一的输出端的配送巴士。输入开关允许从一个或另一个交流输入总线切换到分配总线，快速传输开关用于在输入开关切换期间中断从输入总线向分配总线的供电。

4. 发明授权

US5969957A Single phase to three phase converter 失效
标题翻译：单相至三相转换器
公开(公告)号：US5969957A
公开(公告)日：1999-10-19
申请号：US18356
申请日：1998-02-04
申请人： Deepakraj M. Divan , Robert Schneider
发明人： Deepakraj M. Divan , Robert Schneider
IPC分类号： H02M5/00 , H02M5/257 , H02M5/458 , H02M3/36
CPC分类号： H02M5/458
摘要： A converter for providing three phase power to a three phase load from a single phase supply includes an inverter connected to single phase input power lines and a bi-directional switch connected in series with one of the input power lines. The converter has three output lines, one connected to the inverter output, another connected to an input power line between the bi-directional switch and the inverter, and the third connected directly to the other input power line. The inverter switching devices are controlled to provide a signal on the output of the inverter to provide balanced three phase power on the converter output lines. This is preferably accomplished by pulse width modulation of an inverter output voltage reference signal derived by phase shifting the single phase input voltage signal by 60.degree.. The inverter is preferably also controlled to phase shift the inverter output signal when necessary to ensure that the net power flow into the inverter is zero under light load conditions. During load start-up, the bi-directional switch is phase controlled to adjust the amplitude of the converter output current to thereby adjust the load current to limit inrush current levels and provide a soft starter by ramping up the current in the load.
摘要翻译：用于从单相电源向三相负载提供三相电力的A转换器包括连接到单相输入电力线的逆变器和与输入电力线之一串联连接的双向开关。变频器有三条输出线，一条连接到变频器输出，另一条连接到双向开关和逆变器之间的输入电源线，第三条直接连接到另一条输入电源线。逆变器开关装置被控制以在逆变器的输出端提供信号，以在转换器输出线上提供平衡的三相电力。这优选通过将单相输入电压信号相移60°而得到的逆变器输出电压参考信号的脉宽调制来实现。为了确保在轻载条件下进入逆变器的净功率流量为0，逆变器优选地也被控制为使逆变器输出信号相移。在负载启动期间，双向开关被相位控制，以调整转换器输出电流的幅度，从而调整负载电流以限制浪涌电流水平，并通过升高负载中的电流来提供软起动器。

5. 发明授权

US09325171B2 Impute DC link (IDCL) cell based power converters and control thereof 有权
标题翻译：基于直流链路（IDCL）单元的功率转换器及其控制
公开(公告)号：US09325171B2
公开(公告)日：2016-04-26
申请号：US13757731
申请日：2013-02-01
申请人： Deepakraj M. Divan , Anish Prasai , Jorge Hernendez , Rohit Moghe , Amrit Iyer , Rajendra Prasad Kandula
发明人： Deepakraj M. Divan , Anish Prasai , Jorge Hernendez , Rohit Moghe , Amrit Iyer , Rajendra Prasad Kandula
IPC分类号： H02J1/10 , H02J3/00 , H02J3/36
CPC分类号： H02J3/00 , H02J3/36 , Y02E60/60 , Y10T307/50
摘要： Power flow controllers based on Imputed DC Link (IDCL) cells are provided. The IDCL cell is a self-contained power electronic building block (PEBB). The IDCL cell may be stacked in series and parallel to achieve power flow control at higher voltage and current levels. Each IDCL cell may comprise a gate drive, a voltage sharing module, and a thermal management component in order to facilitate easy integration of the cell into a variety of applications. By providing direct AC conversion, the IDCL cell based AC/AC converters reduce device count, eliminate the use of electrolytic capacitors that have life and reliability issues, and improve system efficiency compared with similarly rated back-to-back inverter system.
摘要翻译：提供基于Imputed DC Link（IDCL）单元的功率流量控制器。 IDCL电池是一个独立的电力电子积木（PEBB）。 IDCL单元可以串联和并联堆叠，以在更高的电压和电流水平实现功率流控制。每个IDCL单元可以包括栅极驱动器，电压共享模块和热管理组件，以便于将单元容易地集成到各种应用中。通过提供直接AC转换，基于IDCL单元的AC / AC转换器减少器件数量，消除使用具有寿命和可靠性问题的电解电容器，并提高系统效率与类似额定的背对背逆变器系统相比。

6. 发明授权

US07957117B2 Voltage surge and overvoltage protection 有权
标题翻译：电压浪涌和过压保护
公开(公告)号：US07957117B2
公开(公告)日：2011-06-07
申请号：US12062953
申请日：2008-04-04
申请人： Deepakraj M. Divan
发明人： Deepakraj M. Divan
IPC分类号： H02H9/00
CPC分类号： H02H9/04 , H02H3/207 , H02H9/002 , H02H9/042 , H02H9/044
摘要： Disclosed are various embodiments of voltage protectors that include a first voltage clamping device configured to clamp a voltage of an input power applied to an electrical load, and a second voltage clamping device configured to clamp the voltage applied to the electrical load. A series inductance separates the first and second voltage clamping devices. Also, a switching element is employed to selectively establish a direct coupling of the input power to the electrical load, where a circuit is employed to control the operation of the switching element.
摘要翻译：公开了电压保护器的各种实施例，其包括被配置为钳位施加到电负载的输入功率的电压的第一电压钳位装置和被配置为钳位施加到电负载的电压的第二电压钳位装置。串联电感分离第一和第二电压钳位装置。此外，采用开关元件来选择性地建立输入功率与电负载的直接耦合，其中采用电路来控制开关元件的操作。

7. 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。

8. 发明授权

US5619406A Modulator for resonant link converters 失效
标题翻译：谐振链路转换器的调制器
公开(公告)号：US5619406A
公开(公告)日：1997-04-08
申请号：US491542
申请日：1995-06-16
申请人： Deepakraj M. Divan , Ian Dobson , Glen A. Luckjiff
发明人： Deepakraj M. Divan , Ian Dobson , Glen A. Luckjiff
IPC分类号： H02M7/48 , H02M1/12 , H02M1/14 , H02M3/24 , H02M5/42
CPC分类号： H02M7/4826
摘要： A modulator for resonant DC link and other power converters is provided having superior performance and general applicability to multi-phase converters. The modulator includes three major components: (1) a multi-input, multi-output linear system, (2) a quantizer, and (3) a latch. The linear system receives multiple reference signal waveforms and multiple feedback signal waveforms representative of the modulator output as input signals and produces multiple linear output signals derived from the difference between the reference and feedback waveforms as outputs. The linear system is preferably a second order system. The quantizer assigns the continuous output of the linear system to one of a finite set of discrete output vectors. The output of the quantizer is latched at a sampling rate synchronized with the times of zero voltage or current on the DC bus of the converter. The latched outputs are used as both control signals, to control the inverter output switching devices, and to derive the feedback waveform signals provided to the linear system. The modulator may be provided as part of a resonant DC link inverter or as part of a control system for such an inverter.
摘要翻译：提供了一种用于谐振DC链路和其它功率转换器的调制器，其具有优异的性能和对多相转换器的普遍适用性。调制器包括三个主要部分：（1）多输入多输出线性系统，（2）量化器和（3）锁存器。线性系统接收多个参考信号波形和表示调制器输出的多个反馈信号波形作为输入信号，并产生从参考和反馈波形之间的差分导出的多个线性输出信号作为输出。线性系统优选为二阶系统。量化器将线性系统的连续输出分配给有限的一组离散输出向量之一。量化器的输出以与转换器的直流总线上零电压或电流的时间同步的采样速率锁存。锁存输出用作控制信号，控制逆变器输出开关器件，并导出提供给线性系统的反馈波形信号。调制器可以被提供为谐振DC链路逆变器的一部分或者作为用于这种逆变器的控制系统的一部分。

9. 发明授权

US5596492A Method and apparatus for de-centralized signal frequency restoration in a distributed UPS system 失效
标题翻译：分布式UPS系统中集中式信号频率恢复的方法和装置
公开(公告)号：US5596492A
公开(公告)日：1997-01-21
申请号：US259881
申请日：1994-06-14
申请人： Deepakraj M. Divan , Mukul Chandorkar
发明人： Deepakraj M. Divan , Mukul Chandorkar
IPC分类号： H02J3/14 , H02J3/46 , H02J9/06 , H02M7/44
CPC分类号： H02J9/062 , H02J3/14 , H02J3/46 , Y02B70/3225 , Y02B70/3291 , Y04S20/222 , Y04S20/248 , Y10T307/615 , Y10T307/664
摘要： An Uninterruptible Power Supply (UPS) for de-centralized operation in a distributed UPS system is described. The UPS system includes a number of UPS units that do not have communication links between them and therefore operate in a de-centralized manner. Coordinated operation in the UPS system is achieved through a controller associated with each UPS unit. The controller identifies when the operating power signal frequency on the UPS system does not correspond to a nominal operating frequency. In response to this condition, the controller generates a frequency reference signal that is used to control the inverter of the UPS unit. The controller continuously estimates the fractional loading of the distributed system by gauging the system response to disturbances, and sets its own operating point accordingly. The controller also ensures that the system operates at its nominal frequency independent of loading. As a result, the inverter produces a power signal at the target frequency and with a power level equivalent to the power level associated with each of the UPS units of the UPS system. The performance of the overall system is not sensitive to small differences in the nominal frequency settings of the individual UPS units.
摘要翻译：描述了用于在分布式UPS系统中进行集中式操作的不间断电源（UPS）。 UPS系统包括多个UPS单元，它们之间没有通信链路，因此以非集中式的方式运行。通过与每个UPS单元相关联的控制器实现UPS系统中的协调操作。控制器识别UPS系统上的工作电源信号频率何时不符合标称工作频率。响应于这种情况，控制器产生用于控制UPS单元的逆变器的频率参考信号。控制器通过测量系统对扰动的响应来不断地估计分布式系统的分数负载，并相应地设置自己的工作点。控制器还可以确保系统在额定频率下独立运行。因此，逆变器以目标频率产生功率信号，功率电平等于与UPS系统的每个UPS单元相关联的功率电平。整个系统的性能对于单个UPS单元的标称频率设置的小差异不敏感。

10. 发明授权

US09065321B2 Isolated dynamic current converters 有权
标题翻译：隔离式动态电流转换器
公开(公告)号：US09065321B2
公开(公告)日：2015-06-23
申请号：US13726524
申请日：2012-12-24
申请人： Deepakraj M. Divan , Anish Prasai , Hao Chen
发明人： Deepakraj M. Divan , Anish Prasai , Hao Chen
IPC分类号： H02M3/335 , H02M1/00 , H02M7/02 , H02M5/00 , H02M7/42 , H02M5/22 , H02M7/23 , H02M7/48 , H02M7/493 , H02M5/458 , H02M1/12
CPC分类号： H02M1/00 , H02M1/126 , H02M3/33576 , H02M5/00 , H02M5/225 , H02M7/02 , H02M7/23 , H02M7/42 , H02M7/4807 , H02M7/493
摘要： Isolated Dynamic-Current (“Dyna-C”) converters are converters that convert incoming 3-phase AC or DC power to a mix of DC and AC power via an isolation link. In various embodiments, the isolation link is a high-frequency isolation transformer. Isolated Dyna-C converters may provide a high-frequency galvanic isolation and are able to convert three-phase AC power to three-phase AC power, or three-phase AC power to DC and vice versa. The topology is minimal and the costs are low. Isolated Dyna-C converters provide fast current responses and keep the losses low by using a simplified two-stage conversion and providing a magnetizing current that is dynamically controllable and tailored to the load. An isolated Dyna-C converter may synthesize currents at its input or output ports with an arbitrary phase that is relative to the grid or load voltages, thereby enabling a full independent control over the active and reactive power at its ports.
摘要翻译：隔离式动态电流（“Dyna-C”）转换器是通过隔离链路将输入的三相交流或直流电源转换为直流和交流电源的转换器。在各种实施例中，隔离链路是高频隔离变压器。隔离式Dyna-C转换器可以提供高频电流隔离，并能够将三相交流电源转换为三相交流电，或将三相交流电转换为直流电，反之亦然。拓扑结构很小，成本低。隔离式Dyna-C转换器通过使用简化的两级转换提供快速电流响应并保持低损耗，并提供可动态控制并针对负载量身定制的励磁电流。隔离的Dyna-C转换器可以在其输入或输出端口处以相对于电网或负载电压的任意相位合成电流，从而实现对其端口的有功功率和无功功率的完全独立控制。

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