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    • 4. 发明授权
    • DC backup power supply system and disk array using same
    • 直流备用电源系统和磁盘阵列使用相同
    • US07406623B2
    • 2008-07-29
    • US10951613
    • 2004-09-29
    • Fumikazu TakahashiIsao Nemoto, legal representativeAkihiko KanoudaMasahiro HamaogiYoshihide Takahashi
    • Minehiro Nemoto
    • G06F11/00
    • H02J9/061Y10T307/625
    • In the case where there coexist general loads requiring backup only for a short duration and a specific load requiring backup for a longer duration, uninterruptible power with higher reliability is supplied to the specific load with the adoption of a simple configuration. A DC backup power supply system comprises an AC/DC converter for normally supplying DC power to loads in while (the general loads and the specific load, included), and a control circuit for supplying DC output backing up the loads in whole for relatively short time only from a battery at the time of a power outage, while supplying DC output backing up the specific load, such as a cache memory and so forth, for relatively long time. Thus, it is possible to implement an uninterruptible power supply system small in size and low in cost, provided with a function for proper use depending on a prevailing situation.
    • 在需要在短时间内需要备份的一般负载和需要较长持续时间备份的特定负载的情况下,采用简单配置向具体负载提供具有更高可靠性的不间断电源。 直流备用电源系统包括用于在(一般负载和特定负载)下正常供应直流电力的AC / DC转换器,以及用于提供直流输出的控制电路,其整体负载相对较短 在停电的时候只能从电池中提供时间,同时在相对长的时间内提供备份诸如高速缓冲存储器等的特定负载的DC输出。 因此,可以实现尺寸小,成本低的不间断电源系统,其具有根据现行情况适当使用的功能。
    • 10. 发明授权
    • PWM signal generating circuit and power supply apparatus comprising such PWM signal generating circuit
    • PWM信号发生电路和包括这种PWM信号发生电路的电源装置
    • US07683597B2
    • 2010-03-23
    • US11865743
    • 2007-10-02
    • Takae ShimadaFumikazu TakahashiHiroyuki ShojiYoshihide TakahashiWataru Mochizuki
    • Takae ShimadaFumikazu TakahashiHiroyuki ShojiYoshihide TakahashiWataru Mochizuki
    • G05F1/00H03K3/017
    • H03K7/08
    • To provide a power supply apparatus having high control resolution of an output power. A PWM signal generating circuit includes: a non-inverting element 31, and an inverting element 32; and further includes a counter 11 for performing count operation in response to rising of a clock signal, a counter 12 for performing count operation in response to falling of the clock signal, comparison circuits 21, 22, and a multiplexer 20. These circuit elements are controlled by PWM control means 10. As another circuit element, the PWM signal generating circuit includes a logical sum element 33. The PWM signal generating circuit serves to arbitrarily change both period and logic “H” time of a PWM signal to be outputted at a time interval which is one half of the clock period. Thus, there is provided a power supply apparatus in which resolution of a PWM signal has been improved within a broad duty range, and fine control of an output power has been performed within a broad output power range.
    • 提供具有输出功率的高控制分辨率的电源装置。 PWM信号发生电路包括:非反相元件31和反相元件32; 并且还包括用于响应于时钟信号的上升执行计数操作的计数器11,用于响应于时钟信号的下降执行计数操作的计数器12,比较电路21,22和多路复用器20.这些电路元件 由PWM控制装置10控制。作为另一个电路元件,PWM信号产生电路包括逻辑和元件33.WPM信号发生电路用于任意地改变要在a输出的PWM信号的周期和逻辑“H”时间 时间间隔是时钟周期的一半。 因此,提供了一种在广泛的占空比范围内改善了PWM信号的分辨率并且在宽输出功率范围内执行输出功率的精细控制的电源装置。