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    • 1. 发明授权
    • Power system having AC and DC power sources
    • 具有交流和直流电源的电力系统
    • US08253273B2
    • 2012-08-28
    • US12452658
    • 2007-07-26
    • Steven J. FredetteWesley E. Sedlacek, Jr.
    • Steven J. FredetteWesley E. Sedlacek, Jr.
    • H02J9/00H02J3/38
    • H02M1/10H01H2300/018Y10T307/544Y10T307/615
    • A power system (110; 210; 310) combines a power source (14) having a DC output (20A, 20B) with an AC supply from the AC grid (12) to provide AC to customer's loads (16) and DC to various DC auxiliary loads (134, 134A). The DC output of the DC power source (14) is connected in steady-state to the DC input (120A, 120B, 60) of a converter/bi-directional inverter (122; 222) for conversion therein to AC for connection (124, 124A, 32) to the customer's loads (16) and (124, 124B) to any AC auxiliary loads (134, 234). During start-up of the DC power source (14), an open isolation switch (70) disconnects that DC power source (14) from the bi-directional inverter (122; 222). A start-up power supply (50, 60; 250, 60; 90, 180, 60) selectively connects (56; 94) between the AC power grid (12) and the bi-directional inverter (122; 222) and/or DC controllers (134A) to provide a supply of rectified DC power at the inverter DC input and to certain DC auxiliary loads (134, 234). DC power is supplied to the auxiliary loads (134; 234) from the inverter DC input substantially continuously during start-up and steady state.
    • 电力系统(110; 210; 310)将具有DC输出(20A,20B)的电源(14)与来自AC电网(12)的AC电源组合,以向客户的负载(16)提供AC并将DC提供给各种 直流辅助负载(134,134A)。 直流电源(14)的直流输出端连接到转换器/双向逆变器(122; 222)的直流输入端(120A,120B,60),用于将其转换成用于连接的交流电(124) ,124A,32)连接到客户的负载(16)和(124,124B)到任何AC辅助负载(134,234)。 在DC电源(14)启动期间,开路隔离开关(70)将该直流电源(14)与双向逆变器(122; 222)断开。 启动电源(50,60; 250,60; 90,180,60)有选择地在交流电网(12)和双向逆变器(122; 222)之间连接(56; 94)和/或 DC控制器(134A),用于在逆变器DC输入端和某些DC辅助负载(134,234)处提供整流直流电源。 在启动和稳定状态期间,基本上连续地从逆变器DC输入向辅助负载(134; 234)提供直流电力。
    • 2. 发明申请
    • POWER SYSTEM HAVING AC AND DC POWER SOURCES
    • 具有交流和直流电源的电力系统
    • US20100188869A1
    • 2010-07-29
    • US12452658
    • 2007-07-26
    • Steven J. FredetteWesley E. Sedlacek, JR.
    • Steven J. FredetteWesley E. Sedlacek, JR.
    • H02J1/00
    • H02M1/10H01H2300/018Y10T307/544Y10T307/615
    • A power system (110; 210; 310) combines a power source (14) having a DC output (20A, 20B) with an AC supply from the AC grid (12) to provide AC to customer's loads (16) and DC to various DC auxiliary loads (134, 134A). The DC output of the DC power source (14) is connected in steady-state to the DC input (120A, 120B, 60) of a converter/bi-directional inverter (122; 222) for conversion therein to AC for connection (124, 124A, 32) to the customer's loads (16) and (124, 124B) to any AC auxiliary loads (134, 234). During start-up of the DC power source (14), an open isolation switch (70) disconnects that DC power source (14) from the bi-directional inverter (122; 222). A start-up power supply (50, 60; 250, 60; 90, 180, 60) selectively connects (56; 94) between the AC power grid (12) and the bi-directional inverter (122; 222) and/or DC controllers (134A) to provide a supply of rectified DC power at the inverter DC input and to certain DC auxiliary loads (134, 234). DC power is supplied to the auxiliary loads (134; 234) from the inverter DC input substantially continuously during start-up and steady state.
    • 电力系统(110; 210; 310)将具有DC输出(20A,20B)的电源(14)与来自AC电网(12)的AC电源组合,以向客户的负载(16)提供AC并将DC提供给各种 直流辅助负载(134,134A)。 直流电源(14)的直流输出端连接到转换器/双向逆变器(122; 222)的直流输入端(120A,120B,60),用于将其转换成用于连接的交流电(124) ,124A,32)连接到客户的负载(16)和(124,124B)到任何AC辅助负载(134,234)。 在DC电源(14)启动期间,开路隔离开关(70)将该直流电源(14)与双向逆变器(122; 222)断开。 启动电源(50,60; 250,60; 90,180,60)有选择地在交流电网(12)和双向逆变器(122; 222)之间连接(56; 94)和/或 DC控制器(134A),用于在逆变器DC输入端和某些DC辅助负载(134,234)处提供整流直流电源。 在启动和稳定状态期间,基本上连续地从逆变器DC输入向辅助负载(134; 234)提供直流电力。
    • 5. 发明授权
    • Fuel cell voltage control
    • 燃料电池电压控制
    • US07041405B2
    • 2006-05-09
    • US10681493
    • 2003-10-07
    • Tommy SkibaDavid D. JaynePaul A. GrubbRishi GroverTimothy M. RemmersWesley E. Sedlacek, Jr.
    • Tommy SkibaDavid D. JaynePaul A. GrubbRishi GroverTimothy M. RemmersWesley E. Sedlacek, Jr.
    • H01M8/04
    • H01M8/04037H01M8/04014H01M8/04029H01M8/04097H01M8/04231H01M8/04238H01M8/04268H01M8/0432H01M8/04335H01M8/04358H01M8/04955H01M2250/10Y02B90/14
    • An auxiliary load (148) for a fuel cell stack (102) is alternatively connected and disconnected from the fuel cell external circuit (177, 178) by a switch (200) in response to a switch control (201), repetitively, during startup and shutdown. The switch may be an insulated gate bipolar transistor (208) which is turned on and off by hunting between an upper limit voltage (207) and a lower limit voltage (208), which may be performed by compare circuits (205, 206), by the controller (202), or by commercially available voltage responsive hysteresis switches. Schedules of duty cycle as a function of cell stack voltage for startup (212) and shutdown (213) control a pulse width modulator (215) which operates the switch. Controls (229, 231) may limit the modulation so that the auxiliary load does not overheat, in response to temperature (221) of the load or a voltage/power model (235). The auxiliary load may comprise a heater in a water accumulator (247), an air intake (257) or an enthalpy recovery device (262).
    • 用于燃料电池堆(102)的辅助负载(148)在启动期间重复地响应于开关控制(201)由开关(200)交替地连接和断开与燃料电池外部电路(177,178)的连接 和关机。 开关可以是绝缘栅双极晶体管(208),其通过在比较电路(205,206)之间的上限电压(207)和下限电压(208)之间的摆幅来接通和断开, 由控制器(202)或商业上可获得的电压响应迟滞开关。 作为启动(212)和停机(213)的电池堆电压的函数的占空比的调度控制操作开关的脉宽调制器(215)。 响应于负载的温度(221)或电压/功率模型(235),控制(229,231)可以限制调制以使辅助负载不过热。 辅助负载可以包括在蓄水器(247),进气口(257)或焓回收装置(262)中的加热器。