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    • 4. 发明授权
    • Variable frequency power converter for ac motor drive
    • 用于交流电机驱动的变频电源转换器
    • US3939387A
    • 1976-02-17
    • US462534
    • 1974-04-19
    • Takeo Maeda
    • Takeo Maeda
    • H02M1/14H02M5/45H02M7/48H02P27/06H02P5/40
    • H02P27/06H02M1/14H02M5/4505H02P2201/03
    • In a variable frequency power converter of a current type for driving an AC motor including a rectifier, an inverter, and a smoothing reactor disposed on a DC transmission line between the rectifier and the inverter, there are provided a series circuit having a switching circuit and a smoothing capacitor on the DC input side of the inverter and a feedback circuit having controlled rectifier elements and commutation reactors for feeding back the reactive power of the AC motor. The power converter operates as a current type converter until the output frequency of the converter reaches a predetermined value under the condition that the switching circuit and the controlled rectifier elements are non-conductive, and operates as a voltage type converter when the output frequency has reached the predetermined value under the condition that the switching circuit and the controlled rectifier elements are conductive.
    • 在用于驱动包括整流器,逆变器和设置在整流器与逆变器之间的直流传输线上的平滑电抗器的交流电动机的电流型变频电力变换器中,提供一种具有开关电路和 在逆变器的直流输入侧的平滑电容器和具有可控整流元件的反馈电路和用于反馈交流电动机的无功功率的换向电抗器。 电源转换器作为电流型转换器工作,直到转换器的输出频率在开关电路和可控整流元件不导通的条件下达到预定值,并且当输出频率达到时作为电压型转换器工作 在开关电路和可控整流元件导通的条件下的预定值。
    • 5. 发明授权
    • Method of manufacturing a BiMOS device
    • 制造BiMOS器件的方法
    • US5523242A
    • 1996-06-04
    • US243919
    • 1994-05-17
    • Takeo MaedaHiroshi Momose
    • Takeo MaedaHiroshi Momose
    • H01L21/285H01L21/331H01L21/8249H01L21/265
    • H01L29/66272H01L21/28525H01L21/8249Y10S148/009
    • A method of manufacturing a semiconductor device. A semiconductor substrate is prepared and a gate oxide film is formed on a surface of the semiconductor substrate. The gate oxide film is selectively removed to expose portions of the semiconductor substrate and a first polysilicon layer is formed on a resultant semiconductor structure. Impurities are implanted in the polysilicon layer and a resultant semiconductor structure is annealed to activate the impurities. The first polysilicon layer is patterned to form a base electrode of the bipolar transistor and a source drain electrode of the MOS transistor. An insulating layer is then formed on a resultant semiconductor structure. Portions of the semiconductor substrate are then selectively exposed and a second polysilicon layer is formed on a resultant semiconductor structure. The second polysilicon layer is then patterned to form an emitter electrode of the bipolar transistor.
    • 一种制造半导体器件的方法。 制备半导体衬底,并且在半导体衬底的表面上形成栅极氧化膜。 选择性地去除栅极氧化膜以暴露半导体衬底的部分,并且在所得半导体结构上形成第一多晶硅层。 将杂质注入多晶硅层,并将所得半导体结构退火以活化杂质。 图案化第一多晶硅层以形成双极晶体管的基极和MOS晶体管的源极漏极。 然后在所得半导体结构上形成绝缘层。 然后选择性地暴露半导体衬底的部分,并且在所得半导体结构上形成第二多晶硅层。 然后将第二多晶硅层图案化以形成双极晶体管的发射极。