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    • 5. 发明公开
    • POWER CONVERSION APPARATUS
    • STROMRICHTER
    • EP2667501A4
    • 2017-07-26
    • EP11856054
    • 2011-12-28
    • DAIKIN IND LTD
    • OGAWA TAKUROUSEKIMOTO MORIMITSU
    • H02P6/16H02M5/458H02M7/48H02P6/10H02P27/06H02P29/032H02P29/50
    • H02P23/26H02M5/458H02P29/032H02P29/50
    • A converting section (20) is provided, which is configured to convert, by switching of a plurality of switching devices (Sr, Ss, St, Su, Sv, Sw, Sx, Sy, Sz), power from an AC power supply (6) into AC power having a predetermined frequency to output the AC power to a motor (5). A controller (40) is provided, which is configured to perform a torque control such that output torque of the motor (5) contains a power-supply pulsating component which is a pulsating component with the integer-fold of the frequency of output voltage of the AC power supply (6) and that the output torque of the motor (5) varies in association with variation in load torque of the motor (5), and which is configured to obtain a peak current value when the timing of the peak of the power-supply pulsating component and the timing of the peak of a load torque pulsating component are coincident or substantially coincident with each other and to reduce the variation range of the output torque such that the peak current value does not exceed a predetermined upper limit.
    • 提供转换部分(20),其被配置为通过切换多个开关器件(Sr,Ss,St,Su,Sv,Sw,Sx,Sy,Sz)来转换来自AC电源( 6)转换成具有预定频率的AC电力,以将AC电力输出到电动机(5)。 提供一种控制器(40),其被配置为执行转矩控制,使得电动机(5)的输出转矩包含电源脉动分量,该电源脉动分量是输出电压频率的整数倍的脉动分量 所述交流电源(6)以及所述电动机(5)的输出转矩与所述电动机(5)的负载转矩的变化相关联地变化,并且所述电动机(5)的峰值的定时 电源脉动分量和负载转矩脉动分量的峰值的定时彼此一致或基本一致,并且减小输出转矩的变化范围,使得峰值电流值不超过预定的上限。