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    • 4. 发明授权
    • Switching circuit and multi-voltage level power supply unit employing the same
    • 开关电路和采用该开关电路的多电平电源单元
    • US06522034B1
    • 2003-02-18
    • US09654568
    • 2000-09-01
    • Masashi Nakayama
    • Masashi Nakayama
    • H01H3500
    • B60L1/00B60L2210/10B60L2210/20B60L2210/30H02J2001/008H02P6/34Y02T10/642Y02T10/7216Y02T10/7241Y02T10/725Y10T307/406Y10T307/858
    • A multi-voltage level power supply unit has a constant voltage source for providing a first voltage, a switching circuit connected to the constant voltage source and a DC/DC converter for reducing the first voltage so as to provide the second voltage. The first voltage may be 42-volts and the second voltage may be 14-volts, for example. The switching circuit is connected to the constant voltage source. And the switching circuit has a first relay designed to operate at the second voltage lower than the first voltage, a first semiconductor device and a control unit (CPU). Namely, the first semiconductor device has a first control electrode (base electrode), a first main electrode (emitter electrode) for receiving the first voltage, a second main electrode (collector electrode) connected to the first relay. And the CPU is connected to the first control electrode. The CPU provides a first control signal to the first control electrode so as to increase an interelectrode voltage between the first and second main electrodes, only during transition periods between open to closed states and closed to open states. Further the CPU provides second control signal to the first control electrode so as to decrease the interelectrode voltage during steady state periods of the first relay. The constant voltage source is constructed of an alternator and an AC/DC converter connected to the alternator.
    • 多电平电源单元具有用于提供第一电压的恒定电压源,连接到恒压源的开关电路和用于降低第一电压以提供第二电压的DC / DC转换器。 例如,第一电压可以是42伏,第二电压可以是14伏。 开关电路连接到恒压源。 并且开关电路具有设计成在低于第一电压的第二电压下工作的第一继电器,第一半导体器件和控制单元(CPU)。 也就是说,第一半导体器件具有第一控制电极(基极),用于接收第一电压的第一主电极(发射电极),与第一继电器连接的第二主电极(集电极)。 并且CPU连接到第一控制电极。 CPU向第一控制电极提供第一控制信号,以便仅在打开至关闭状态和闭合状态之间的过渡期期间增加第一和第二主电极之间的电极间电压。 此外,CPU向第一控制电极提供第二控制信号,以便在第一继电器的稳定状态期间降低电极间电压。 恒压源由交流发电机和连接到交流发电机的AC / DC转换器构成。
    • 6. 发明授权
    • Overcurrent protection device and overcurrent protection system
    • 过电流保护装置及过电流保护系统
    • US08547676B2
    • 2013-10-01
    • US13394273
    • 2011-02-04
    • Kazumi NagasawaKaoru KuritaMasashi NakayamaIchiro ToyamaMitsuaki MaedaShigemi Ishima
    • Kazumi NagasawaKaoru KuritaMasashi NakayamaIchiro ToyamaMitsuaki MaedaShigemi Ishima
    • H02H3/08
    • H02H3/07H02H3/087
    • Provided are an overcurrent protection device and an overcurrent protection system which can provide time differences among the timings for executing the retry operations among a plurality of overcurrent protection devices connected to a common power supply. When a battery voltage (VBA) becomes a value equal to or lower than a threshold voltage after an FET (Q1) of an IC circuit (51-1) is turned on, all FETs (Q1) of the respective IC circuits are turned off, and a time until the battery voltage (VBA) reduces to a value lower than a threshold voltage after the turning-on of the FET (Q1) is clocked. When the time is smaller than 400 μsec, the count value N is incremented. Further, turning-on of the FETs (Q1) is repeated after the lapse of the standby time (Tp) set randomly. When the count value N reaches 7, the FET (Q1) of the IC circuit 51-1 is held in the turned-off state. Accordingly, only the load-driving circuit at which the dead short occurs can be stopped and the driving of the other load-driving circuits can be continued.
    • 提供一种过电流保护装置和过电流保护系统,其可以在连接到公共电源的多个过电流保护装置之间提供用于执行重试操作的定时之间的时间差。 当IC电路(51-1)的FET(Q1)导通后,当电池电压(VBA)变为等于或低于阈值电压的值时,各IC电路的所有FET(Q1)都被断开 ,并且在FET(Q1)导通之后,直到电池电压(VBA)降低到低于阈值电压的值为止的时间。 当时间小于400个音乐时,计数值N增加。 此外,在随机设置待机时间(Tp)之后,重复FET(Q1)的接通。 当计数值N达到7时,IC电路51-1的FET(Q1)保持在截止状态。 因此,仅能够停止发生死极的负载驱动电路,并且可以继续驱动其他负载驱动电路。
    • 7. 发明申请
    • Powder feeding device and image forming apparatus
    • 粉末供给装置和成像装置
    • US20120063814A1
    • 2012-03-15
    • US13137598
    • 2011-08-29
    • Yukio OtomeMasashi NakayamaHiroyuki Mabuchi
    • Yukio OtomeMasashi NakayamaHiroyuki Mabuchi
    • G03G15/08
    • G03G15/0877G03G15/0822G03G15/0879
    • A powder feeding device includes a powder container, a feeding tank in communication with the powder container, a negative pressure room in communication with the feeding tank via a suction port communicating tube; an air suction device in communication with the negative pressure room via a negative pressure room communication tube; a suction port opening and closing unit that opens and closes the suction port communicating tube; a negative pressure room opening and closing unit that opens and closes of the negative pressure room communication tube; an output port opening and closing unit that opens and closes an output port of the feeding tank; and a controller that performs negative pressure generation control, powder supply control, and powder discharge control. Further, the controller simultaneously starts the negative pressure generation control and the powder discharge control.
    • 粉末供给装置包括粉末容器,与粉末容器连通的供给罐,经由吸入口连通管与供给罐连通的负压室; 空气抽吸装置,经由负压室连通管与负压室连通; 吸入口打开和关闭单元,其打开和关闭所述吸入口连通管; 负压室开闭单元,负压室连通管的开闭; 输出口打开和关闭单元,其打开和关闭所述进料罐的输出口; 以及执行负压产生控制,粉末供给控制和粉末排放控制的控制器。 此外,控制器同时开始负压产生控制和粉末排放控制。