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    • 8. 发明专利
    • Power conversion apparatus
    • 功率转换装置
    • JP2014121200A
    • 2014-06-30
    • JP2012275693
    • 2012-12-18
    • Hitachi Ltd株式会社日立製作所Hitachi Mito Engineering Co Ltd日立水戸エンジニアリング株式会社
    • SUGIURA TORUKOJIMA TETSUOSHINOMIYA KENJIKAWAMOTO TAKEYASUMURAOKA KAZUFUMI
    • H02M3/00
    • H02M3/00H02M1/15H02M2001/0022
    • PROBLEM TO BE SOLVED: To solve such a problem that there is a case where sufficient control response to input voltage variation cannot be obtained and electric oscillation cannot be effectively suppressed in damping control for suppressing electric oscillation generated in an input side LC filter of a DC-DC conversion apparatus.SOLUTION: A control apparatus for the DC-DC conversion apparatus includes a subtractor for detecting a first filter capacitor voltage and a DC power supply voltage and subtracting the DC power supply voltage from the filter capacitor voltage and a bypass filter for cutting off a DC component in a subtraction result of the subtractor, shifting a phase of an AC component and outputting damping control quantity. By adding the damping control quantity to a voltage command of the DC-DC conversion apparatus, electric oscillation generated in the input side LC filter of the DC-DC conversion apparatus can be suppressed.
    • 要解决的问题为了解决这样一个问题,即在DC的输入侧LC滤波器中产生的抑制电振荡的阻尼控制的阻尼控制中,不能获得对输入电压变化的足够的控制响应并且不能有效地抑制电振荡 -DC转换装置。用于DC-DC转换装置的控制装置包括用于检测第一滤波电容器电压和DC电源电压并从滤波电容器电压减去DC电源电压的减法器和用于 在减法器的减法结果中切断DC分量,移动AC分量的相位并输出阻尼控制量。 通过将减振控制量添加到DC-DC转换装置的电压指令,可以抑制在DC-DC转换装置的输入侧LC滤波器中产生的电振荡。
    • 10. 发明专利
    • Communication system for elevator
    • 电梯通讯系统
    • JP2009078904A
    • 2009-04-16
    • JP2007250404
    • 2007-09-27
    • Hitachi LtdHitachi Mito Engineering Co Ltd日立水戸エンジニアリング株式会社株式会社日立製作所
    • MURAOKA KAZUFUMIINABA HIROMIYOSHIKAWA TOSHIFUMIONUKI AKIRAHIRUTA KIYOHARUOKABE REI
    • B66B3/00
    • PROBLEM TO BE SOLVED: To provide a communication system for an elevator capable of surely carrying out communication even when a communication system is interfered by a power line.
      SOLUTION: In the communication system for the elevator, a switching cycle of power converters 8 and 20 and a transmission speed and a bit number of error-correcting codes in a communication transmission passage are set so that noise on the power line caused by switching in the power converters 8 and 20 has an error bit correcting function of equal to or more than the bit number having the possibility to rewrite bit information in one communication frame. Therefore, the error bit correcting function capable of suitably coping with the noise generated by the power converters 8 and 20 can be achieved, and communication can be surely carried out even when the communication system is interfered by the power line.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:即使在通信系统受到电力线路的干扰的情况下,也能够提供能够可靠地进行通信的电梯的通信系统。 解决方案:在电梯的通信系统中,设置电力转换器8和20的开关周期以及通信传输通道中的发送速度和纠错码的位数,使得电力线上的噪声导致 通过切换功率转换器8和20具有等于或大于具有在一个通信帧中重写比特信息的可能性的比特数的错误比特校正功能。 因此,可以实现能够适当地应对由电力转换器8和20产生的噪声的错误位校正功能,并且即使当通信系统受到电力线的干扰时也可以确保地进行通信。 版权所有(C)2009,JPO&INPIT