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    • 3. 发明专利
    • Power conversion circuit
    • 电源转换电路
    • JP2013223393A
    • 2013-10-28
    • JP2012095308
    • 2012-04-19
    • Sumitomo Electric Ind Ltd住友電気工業株式会社Toyohashi Univ Of Technology国立大学法人豊橋技術科学大学
    • FUJIKAWA KAZUHIROHATSUKAWA SATOSHISHIGA NOBUOOHIRA TAKASHI
    • H02M7/48
    • H02M7/53871H02M7/538H02M7/5387
    • PROBLEM TO BE SOLVED: To make it possible to provide a power conversion circuit at a low price.SOLUTION: A power conversion circuit 1 according to an embodiment is a bridge type power conversion circuit which: comprises first and second switching elements 11 and 12 connected in series in order between a high voltage side input terminal and low voltage side input terminal, and third and fourth switching elements 13 and 14 connected in series in order between the high voltage side input terminal and low voltage side input terminal; and converts DC power input between the high voltage side input terminal and low voltage side input terminal to AC power by alternately switching a set of the first and fourth switching elements 11 and 14 and a set of the second and third switching elements 12 and 13 to an on-state, where any one set of a set of the first and third switching elements 11 and 13 and a set of the second and fourth switching elements 12 and 14 is controlled to be switched at a frequency higher than that of the other set.
    • 要解决的问题:使得可以以低价格提供电力转换电路。解决方案:根据实施例的电力转换电路1是桥式电力转换电路,其包括连接的第一和第二开关元件11和12 按照高压侧输入端子和低压侧输入端子之间的顺序串联连接的第三和第四开关元件13和14,高压侧输入端子和低压侧输入端子之间依次串联连接; 通过交替切换第一和第四开关元件11和14的一组以及第二和第三开关元件12和13的一组,将高压侧输入端子和低压侧输入端子之间的直流电力输入转换成交流电力,以 导通状态,其中一组第一和第三开关元件11和13以及一组第二和第四开关元件12和14中的一组被控制为以比另一组更高的频率切换 。
    • 4. 发明专利
    • Switching circuit
    • 切换电路
    • JP2012253664A
    • 2012-12-20
    • JP2011126341
    • 2011-06-06
    • Sumitomo Electric Ind Ltd住友電気工業株式会社Toyohashi Univ Of Technology国立大学法人豊橋技術科学大学
    • FUJIKAWA KAZUHIROSHIGA NOBUOOHIRA TAKASHIWADA KAZUYUKIISHIOKA KAZUYA
    • H03K17/04H03K17/56
    • H03K17/04123H03K2217/0036H03K2217/0045Y10T307/747
    • PROBLEM TO BE SOLVED: To provide a switching circuit that reduces the charge and discharge time of parasitic capacitance of a semiconductor switch and allows improvement of the switching speed and power efficiency regardless of overdriving.SOLUTION: A pulsed signal is applied to an input terminal of each semiconductor switch element so that when semiconductor switch elements 20a and 20d are ON (OFF), the remaining semiconductor switch elements become OFF (ON). A switching circuit comprises a capacitance element 60 connected between an output terminal of a semiconductor switch element 20b and an input terminal of the semiconductor switch element 20d, and a capacitance element 61 connected between an input terminal of the semiconductor switch element 20b and an output terminal of the semiconductor switch element 20d. The capacitance elements 60 and 61 have capacitance reducing the parasitic capacitance between the input terminal and the output terminal of each of the semiconductor switch elements 20b and 20d at a frequency being N times of the clock frequency of the pulsed signal supplied to the semiconductor switch elements 20b and 20d.
    • 要解决的问题:提供一种切换电路,其减少半导体开关的寄生电容的充电和放电时间,并且允许提高开关速度和功率效率,而不管过驱动。 解决方案:将脉冲信号施加到每个半导体开关元件的输入端子,使得当半导体开关元件20a和20d导通(OFF)时,剩余的半导体开关元件变为OFF(接通)。 开关电路包括连接在半导体开关元件20b的输出端子和半导体开关元件20d的输入端子之间的电容元件60以及连接在半导体开关元件20b的输入端子与输出端子之间的电容元件61 的半导体开关元件20d。 电容元件60和61具有以提供给半导体开关元件的脉冲信号的时钟频率的N倍的频率减小每个半导体开关元件20b和20d的输入端子和输出端子之间的寄生电容的电容 20b和20d。 版权所有(C)2013,JPO&INPIT
    • 5. 发明专利
    • Switching circuit, distributed constant type switching circuit, and envelope signal amplifier
    • 切换电路,分布式恒定类型开关电路和信号放大器
    • JP2011135357A
    • 2011-07-07
    • JP2009293257
    • 2009-12-24
    • Sumitomo Electric Ind LtdToyohashi Univ Of Technology住友電気工業株式会社国立大学法人豊橋技術科学大学
    • OHIRA TAKASHIWADA WASENNAKATA MITSUTOSHIHATSUKAWA SATOSHISHIGA NOBUO
    • H03F3/217H03F1/06
    • PROBLEM TO BE SOLVED: To provide a switching circuit with which higher frequency and larger power amplification is possible than with a push-pull amplifier using a switching element whose semiconductor material consists of silicon or gallium arsenide, by switching an inductance element with a single switching element, and to provide an envelope signal amplifier with the switching circuit.
      SOLUTION: The switching circuit 33a is provided with: an input side transmission line in which gates of n transistors (FET) M1, M2 to Mn using silicon carbide (SiC) as the semiconductor material are cascade-connected via a coil L1; and an output side transmission line in which drains of the respective transistors M1, M2 to Mn are cascade-connected via a coil L2. The transistors Mm (m is an integer from 1 to n) are sequentially turned on by a PWM signal which is given from an input end 331 to be propagated on the input side transmission line, and current which flows in the drain of the transistors Mm is added to current which is propagated in a direction toward an output end 332 on the output side transmission line.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了提供一种与使用半导体材料由硅或砷化镓组成的开关元件的推挽放大器相比可以实现更高频率和更大功率放大的开关电路,通过将电感元件与 单个开关元件,并且提供具有开关电路的包络信号放大器。 解决方案:开关电路33a具有:输入侧传输线,其中使用碳化硅(SiC)作为半导体材料的n个晶体管(FET)M1,M2至Mn的栅极通过线圈L1级联 ; 以及输出侧传输线,其中各个晶体管M1,M2至Mn的漏极经由线圈L2级联连接。 晶体管Mm(m是从1到n的整数)通过从输入端331输出的PWM信号顺序导通,以在晶体管Mm的漏极中流动的电流 被添加到在输出侧传输线上朝向输出端332的方向传播的电流。 版权所有(C)2011,JPO&INPIT