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    • 2. 发明授权
    • Fault protection for a multiphase bridge power converter
    • 多相桥式电源转换器的故障保护
    • US5265002A
    • 1993-11-23
    • US757334
    • 1991-09-10
    • Akira BandoChikara TanakaKeiji SaitoTadao KawaiEizo KitaKeiichi MitsuhashiYasuteru OonoHiroto Nakagawa
    • Akira BandoChikara TanakaKeiji SaitoTadao KawaiEizo KitaKeiichi MitsuhashiYasuteru OonoHiroto Nakagawa
    • H02H7/12H02H7/125H02M7/12H02M7/155H02M7/162
    • H02H7/125
    • A semiconductor power conversion system comprising a multiphase bridge circuit which includes semiconductor devices having a controllable firing function and a reverse blocking characteristic, a gate control circuit which gives firing commands to the semiconductor devices, a short circuiting switch in which switching devices having a controllable firing function and a reverse blocking characteristic are connected in parallel with a DC output side of the multiphase bridge circuit, and a protection control device for performing a control for protecting the multiphase bridge circuit. The protection control device includes a device for detecting a commutation failure of the multiphase bridge circuit, and a device in response to the detection of the commutation failure for producing a blocking command for blocking the firing of the semiconductor devices of the multiphase bridge circuit and producing a short-circuiting command for firing the switching device which is short-circuited which bypasses current of the commutation failure. The protection control device further includes a device for detecting ending of a short-circuit based on the ceasing of current conduction of the short circuiting switch and for halting the blocking of the firing of the semiconductor devices of the multiphase bridge circuit.
    • 一种半导体功率转换系统,包括多相桥式电路,其包括具有可控的点火功能和反向阻断特性的半导体器件,向半导体器件发出触发命令的栅极控制电路,其中具有可控射击的开关器件的短路开关 功能和反向阻断特性与多相桥式电路的直流输出侧并联连接,以及保护控制装置,用于进行保护多相桥式电路的控制。 保护控制装置包括用于检测多相桥式电路的换向故障的装置,以及响应于检测到换向失败的装置,用于产生用于阻断多相桥式电路的半导体装置的点火的阻塞命令并产生 用于点燃短路的开关器件的短路命令,其绕过换向故障的电流。 保护控制装置还包括用于基于短路开关的电流导通的停止以及用于停止多相桥式电路的半导体装置的点火来检测短路结束的装置。
    • 5. 发明申请
    • MAGNETORHEOLOGICAL FLUID SHOCK ABSORBER
    • 磁流体流体吸收器
    • US20140116827A1
    • 2014-05-01
    • US14125921
    • 2012-05-29
    • Keiji SaitoMiho Shimada
    • Keiji SaitoMiho Shimada
    • F16F9/53
    • F16F9/535
    • A magnetorheological fluid shock absorber that uses a magnetorheological fluid having a viscosity includes: a tubular cylinder formed from a non-magnetic material and having the magnetorheological fluid sealed into an inner periphery thereof; a piston formed from a non-magnetic material and disposed in the cylinder to be free to slide at an interval, through which the magnetorheological fluid can pass, relative to the inner periphery of the cylinder; a piston rod to which the piston is connected; and a magnet portion attached to the cylinder in order to apply a magnetic field to an interior of the cylinder. The magnet portion includes a permanent magnet having an inner peripheral shape that aligns with an outer periphery of the cylinder; and a ring member formed from a magnetic material and disposed on an outer peripheral side of the permanent magnet.
    • 使用具有粘性的磁流变流体的磁流变液体缓冲器包括:由非磁性材料形成并具有密封在其内周中的磁流变流体的管状圆筒; 活塞,其由非磁性材料形成并设置在所述气缸中,以相对于所述气缸的内周以间隔自由地滑动,所述磁流变流体可以通过所述间隔滑动; 一活塞杆,活塞连接到该活塞杆上; 以及附接到气缸的磁体部分,以便将磁场施加到气缸的内部。 磁体部分包括具有与圆柱体的外周对准的内周形状的永磁体; 以及由磁性材料形成并设置在永磁体的外周侧的环形构件。