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    • 3. 发明授权
    • Electrostatically actuated shutter and array for use in a direct oxidation fuel cell
    • 用于直接氧化燃料电池的静电驱动的快门和阵列
    • US07306869B2
    • 2007-12-11
    • US10726162
    • 2003-12-02
    • David H. LeachCharles M. Carlstrom, Jr.
    • David H. LeachCharles M. Carlstrom, Jr.
    • H01M8/04
    • H01M8/04082
    • A wide-area electrostatically-actuated shutter is provided that includes a thin, flexible, diaphragm that is placed between two rigid electrode structures. In one embodiment of the invention, the diaphragm has a set of openings in it. These openings overlap with corresponding openings in one of the rigid electrodes such that when the diaphragm is contiguous to that electrode, the openings provide apertures through which vaporous fuel can flow. The opposite electrode does not have overlapping openings, thus it forms a seal that prevents gas or vapor from passing through it when the diaphragm is in contact with the opposite electrode. The shutter is actuated electrostatically by an associated driver that applies a voltage to the diaphragm such that when the high voltage is applied to the diaphragm, the diaphragm is attracted to the fixed electrode that is tied to ground. Alternatively, when is desired to place the shutter in the opposite position, the diaphragm is placed at ground, which, in turn, pulls it towards the fixed electrode that is at a high voltage, to adjust the shutter. The shutter can be rapidly opened and closed at a high frequency in a PWM mode or a PFM mode.
    • 提供了一种广域静电致动的快门,其包括薄的,柔性的隔膜,其被放置在两个刚性电极结构之间。 在本发明的一个实施例中,隔膜在其中具有一组开口。 这些开口与其中一个刚性电极中的相应开口重叠,使得当隔膜与该电极邻接时,开口提供空气燃料可以流过的孔。 相对的电极没有重叠的开口,因此当隔膜与相对电极接触时,它形成一个防止气体或蒸汽通过它的密封件。 通过向隔膜施加电压的相关联的驱动器静电地驱动快门,使得当高压施加到隔膜时,隔膜被吸引到被接地的固定电极。 或者,当希望将快门放置在相反的位置时,隔膜被放置在地面上,接着将其拉向朝向高电压的固定电极,以调节快门。 在PWM模式或PFM模式下,快门可以高频快速打开和关闭。
    • 7. 发明授权
    • Switching DC-DC power converter and battery charger for use with direct oxidation fuel cell power source
    • 开关DC-DC电源转换器和电池充电器,用于直接氧化燃料电池电源
    • US06590370B1
    • 2003-07-08
    • US10261823
    • 2002-10-01
    • David H. Leach
    • David H. Leach
    • G05F500
    • H01M16/006H02J7/34H02J2001/004H02M3/155H02M2001/0022
    • This invention presents a method and apparatus for controlling the operating point, i.e. the output voltage or current, of a fuel cell to a desired value, efficiently transferring the available fuel cell power to a rechargeable battery and load, and isolating the fuel cell from the battery and load. Active control of the operating point of the fuel cell allows for optimized power output and fuel cell efficiency. This invention uses feedback from the input to regulate the input voltage or current. The output of the DC-DC converter either charges the battery or helps the battery supply the load, and is maintained equal to the battery voltage as the output of the DC-DC converter is directly connected to the battery.
    • 本发明提出了一种用于将燃料电池的工作点(即,输出电压或电流)控制到期望值的方法和装置,将可用燃料电池功率有效地传递到可再充电电池并加载,并且将燃料电池与 电池和负载。 主动控制燃料电池的工作点允许优化的功率输出和燃料电池效率。 本发明使用来自输入端的反馈来调节输入电压或电流。 DC-DC转换器的输出可以为电池充电或者帮助电池提供负载,并且由于DC-DC转换器的输出直接连接到电池,所以电池电压保持等于电池电压。