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    • 2. 发明授权
    • Power device with commonly used switching elements
    • 功率器件具有常用的开关元件
    • US6108225A
    • 2000-08-22
    • US113322
    • 1998-07-10
    • Yutaka IwahoriHiroichi ShinboriTsutomu ShiomiToshiaki NakamuraShinji Hizuma
    • Yutaka IwahoriHiroichi ShinboriTsutomu ShiomiToshiaki NakamuraShinji Hizuma
    • H02M7/217H02M5/45H02M3/24H02M7/5387
    • H02M7/217
    • A power device includes at least two power conversion circuits respectively having at least one of switching elements, at least one of which switching elements in these conversion circuits being used in common as an element constituting the at least two different power conversion circuits, a control device providing at least a period in which at least one of currents flowing from at least one of the different power conversion circuits to the commonly used switching element has a polarity inverse to at least the other one of the currents flowing from at least the other one of the power conversion circuits, so as to cancel each other, and a unit for detecting the state of the respective conversion circuits. The operation of the switching elements is thereby made modifiable in accordance with a lowering in the resistance of a load of the device, and the withstand voltage of the elements can be prevented effectively from rising even upon any fluctuation in the load.
    • 功率器件包括分别具有开关元件中的至少一个的至少两个功率转换电路,这些转换电路中的至少一个作为构成至少两个不同功率转换电路的元件被共同使用,其中至少一个控制器件 提供至少一个周期,其中从至少一个不同的功率转换电路流向常用的开关元件的电流中的至少一个具有与至少另一个电流中至少另一个流中的至少另一个的极性相反的极性 功率转换电路彼此抵消,以及用于检测各个转换电路的状态的单元。 由此,可以根据装置的负载电阻的降低使开关元件的动作变更,能够有效地防止元件的耐受电压上升,即使负载发生波动。
    • 4. 发明授权
    • Discharge lamp lighting device of high startability with high pulse voltage
    • 具有高脉冲电压的高启动性的放电灯点亮装置
    • US06437515B1
    • 2002-08-20
    • US09484005
    • 2000-01-18
    • Takeshi KamoiNaoki KomatsuTsutomu ShiomiHiroichi ShinboriTakeshi GorikiYiyoung Sun
    • Takeshi KamoiNaoki KomatsuTsutomu ShiomiHiroichi ShinboriTakeshi GorikiYiyoung Sun
    • H05B3702
    • H05B41/388H05B41/2883H05B41/2888Y02B20/204
    • A discharge lamp lighting device which comprises a D.C. power supply, a load resonance circuit including an inductor, a capacitor and a discharge lamp; a polarity inverting circuit including at least a series circuit of first and second switching elements connected in parallel to the D.C. power supply for converting a D.C. power received from the D.C. power supply into an A.C. power to supply it to the load resonance circuit; and a control circuit for turning ON and OFF the switching elements alternately at a high frequency to alternately generate a first period during which an ON duration of the second switching element is longer than that of the first switching element and a second period during which the ON duration of the second switching element is shorter than that of the first switching element, to thereby apply a rectangular-shaped low frequency voltage to the discharge lamp. The control circuit superimposes a D.C. component in an output of the polarity inverting circuit upon a resonance pulse signal from the load resonance circuit to continuously change a switching frequency of the switching elements for the predetermined time from the start time point of one of the first and second periods, and supplies to the discharge lamp a first energy necessary for starting and lighting the discharge lamp with a high pulse voltage obtained through LC resonance and also for smoothly shifting the lamp to an arc discharge state.
    • 一种放电灯点灯装置,包括直流电源,包括电感器,电容器和放电灯的负载谐振电路; 极性反转电路至少包括与直流电源并联连接的第一和第二开关元件的串联电路,用于将从直流电源接收的直流电力转换成交流电源以将其提供给负载谐振电路; 以及用于以高频率交替地接通和断开开关元件以交替地产生第二开关元件的导通持续时间长于第一开关元件的导通持续时间的第一时段的控制电路,以及第二时段,其中ON 第二开关元件的持续时间短于第一开关元件的持续时间,从而对放电灯施加矩形的低频电压。 控制电路将极性反转电路的输出中的直流分量叠加在来自负载谐振电路的谐振脉冲信号上,以从第一和第二的一个的起始时间点连续地改变开关元件的开关频率达预定时间 并且向放电灯提供以通过LC谐振获得的高脉冲电压来启动和点亮放电灯所需的第一能量,并且还用于将灯平滑地移动到电弧放电状态。
    • 6. 发明授权
    • Power supply apparatus
    • 电源设备
    • US5671128A
    • 1997-09-23
    • US600219
    • 1996-02-12
    • Toshiaki NakamuraHaruo NagaseHiroichi Shinbori
    • Toshiaki NakamuraHaruo NagaseHiroichi Shinbori
    • H02M7/523H05B41/288H05B41/24
    • H02M7/523H05B41/2886Y02B20/202
    • A power supply apparatus in which a series circuit of first and second switching elements not blocking their reverse-directional currents is connected in parallel to a series circuit of a D.C. power source and a capacitor, a primary winding of a transformer is connected between a junction point of the D.C. power source and capacitor and a junction point of the switching elements, a secondary winding of the transformer is connected to a load circuit, and a controller is provided for controlling ON and OFF operation of the switching elements to cause a switching frequency of the switching elements to be set higher than a resonance frequency of the capacitor and an inductance of the transformer and to cause a voltage across the capacitor to increase.
    • 一种电源装置,其中不阻塞其逆向电流的第一和第二开关元件的串联电路并联连接到直流电源和电容器的串联电路,变压器的初级绕组连接在连接点 直流电源和电容器的点以及开关元件的接点,变压器的次级绕组连接到负载电路,并且提供控制器用于控制开关元件的导通和截止操作以使开关频率 的开关元件设定为高于电容器的谐振频率和变压器的电感,并且使电容器两端的电压增加。