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    • 34. 发明授权
    • System and method for charging and discharging a superconducting coil
    • 超导线圈充放电的系统和方法
    • US07336059B2
    • 2008-02-26
    • US11273984
    • 2005-11-15
    • Robert Louis SteigerwaldLuis Jose Garces
    • Robert Louis SteigerwaldLuis Jose Garces
    • G05F1/62G05F1/59
    • H01F6/006H02M3/158H02M3/3353H02M2001/007H02M2003/1555
    • A system and method for charging and discharging a superconducting coil. The system comprising a boost converter coupled between a low-voltage bus and a high voltage bus, and a buck converter coupled between the high-voltage bus and the coil. The system being configured to charge and discharge the coil without reversing the current while reversing polarity, and to only supply high-voltages when necessary. The system further comprising means to dissipate excess energy during discharge. The method comprising pulse width modulating the solid-state switch of a boost converter to achieve a high-voltage from a low-voltage and then switching solid-state switches of a buck regulator to charge or discharge the coil in a non current reversing, polarity reversing manner.
    • 一种用于对超导线圈充电和放电的系统和方法。 该系统包括耦合在低电压总线和高压总线之间的升压转换器以及耦合在高压总线和线圈之间的降压转换器。 该系统被配置为对线圈进行充电和放电,而不反转电流,同时反转极性,并且仅在必要时提供高电压。 该系统还包括在放电期间耗散多余能量的装置。 该方法包括对升压转换器的固态开关进行脉宽调制,以实现低电压的高电压,然后切换降压调节器的固态开关,以在非电流反向极性中对线圈充电或放电 反转的方式。
    • 38. 发明授权
    • Method and system for detecting a zero current level in a line commutated converter
    • 用于检测线路整流转换器中的零电流电平的方法和系统
    • US06385066B1
    • 2002-05-07
    • US09702642
    • 2000-11-01
    • Luis Jose GarcesVinod JohnPeter Claudius SanzaPaul Michael Szczesny
    • Luis Jose GarcesVinod JohnPeter Claudius SanzaPaul Michael Szczesny
    • H02M542
    • H02M1/32H02M7/1623H02M2001/0012
    • A method and system for determining zero current level occurrences in a reversible power converter without requiring additional component complexity and costs. A digital controller selectively determines the line to line voltage for the most recently fired thyristor pair. The selected line to line voltage is identified as the bridge reconstruction voltage and is compared against the actual bridge output voltage for the conducting bridge. The difference between the two voltage signals is identified as the bridge error voltage and the sign of its magnitude is indicative of a load current zero level occurrence. A zero current level occurrence happens whenever the bridge error voltage drops below zero. This indication is positive and substantially instantaneous and safely enables the reversal of power flow without the risk of line faults due to cross-bridge short circuits.
    • 用于确定可逆功率转换器中的零电流电平发生的方法和系统,而不需要额外的组件复杂性和成本。 数字控制器选择性地确定最近烧制的晶闸管对的线间电压。 所选择的线间电压被确定为桥重建电压,并与导电桥的实际桥输出电压进行比较。 两个电压信号之间的差异被识别为桥接误差电压,其大小的符号表示负载电流零电平发生。 每当桥接误差电压低于零时,就会发生零电流电平。 该指示是正的并且基本上是瞬时的并且安全地实现功率流的反转,而不会由于交叉桥短路而导致线路故障的风险。
    • 39. 发明授权
    • Microturbine based power generation system and method
    • 基于微型涡轮发电系统及方法
    • US06281595B1
    • 2001-08-28
    • US09617955
    • 2000-09-25
    • Gautam SinhaMichael John RyanLuis Jose Garces
    • Gautam SinhaMichael John RyanLuis Jose Garces
    • F02N1106
    • H02P1/30F01D15/10F02C7/268F05D2250/82
    • A power electrical system is disclosed to connect a microturbine and an electrical machine to electrical power sources and a load. The invention permits the microturbine to be started using an external DC power source and/or an external AC power source. DC power is converted to AC power by means of a buck-boost chopper, DC bus and a DC-to-AC converter. AC power, from the AC power source, is converted to frequencies and voltages suitable to start a microturbine by a pair of DC-to-AC converters and the DC bus. The frequency and voltage levels of the AC power are gradually increased to accelerate the microturbine to startup speed. Once the microturbine is started, the external power sources are disconnected, and the DC bus and the DC-to-AC converters produce output AC power at a voltage level and frequency to match an electrical load.
    • 公开了一种电力电气系统,其将微型涡轮机和电机连接到电源和负载。 本发明允许使用外部DC电源和/或外部AC电源来启动微型涡轮机。 直流电源通过降压 - 升压斩波器,直流母线和直流 - 交流转换器转换成交流电源。 来自交流电源的交流电源被转换成适合于通过一对DC-AC转换器和DC总线启动微型涡轮机的频率和电压。 交流电源的频率和电压电平逐渐增加,以加速微型涡轮机的启动速度。 一旦启动了微型涡轮机,外部电源就被断开,直流总线和直流到交流转换器产生一个电压电平和频率的输出交流电源,以匹配一个电气负载。