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    • 12. 发明公开
    • Pulse-width modulation method for a frequency converter
    • Verfahren zur Impulsbreitenmodulationfüreinen Frequenzumrichter
    • EP1511168A2
    • 2005-03-02
    • EP04077401.0
    • 2004-08-24
    • Vacon Oyj
    • Luukko, JuliusSaren, Hannu
    • H02P5/408
    • H02M5/4585H02M2007/53876H02P21/22H02P21/28H02P27/08
    • A space-vector pulse-width modulation method for a frequency converter provided with a voltage intermediate circuit, said frequency converter comprising a mains bridge (10) to be connected to an alternating current source (U U , U V , U W ), a direct-voltage intermediate circuit and a controlled load bridge (11) for supplying a variable-frequency alternating voltage (U S , U R , U T ) to a load (12), and in which method the modulator performing the modulation is given a reference. The load bridge modulator is given a reference consisting of the references for the flux linkage changes produced by the voltage vectors, the flux linkage change is calculated on the basis of measured intermediate-circuit voltage, and the currently active voltage vector is kept turned on until the reference value is reached.
    • 一种用于具有电压中间电路的变频器的空间矢量脉宽调制方法,所述变频器包括要连接到交流电源(UU,UV,UW)的电源桥(10),直流电压 中间电路和用于向负载(12)提供可变频率交流电压(US,UR,UT)的受控负载桥(11),并且以哪种方式给执行调制的调制器给出参考。 负载桥式调制器给出由电压矢量产生的磁链变化参考的参考,基于测量的中间电路电压计算磁链变化,并且当前有效电压矢量保持开启直到 达到参考值。
    • 20. 发明公开
    • Motor control unit and vehicle steering system
    • Motorsteuereinheit und Fahrzeuglenksystem
    • EP2326000A2
    • 2011-05-25
    • EP10191363.0
    • 2010-11-16
    • JTEKT CORPORATION
    • Kariatsumari, YujiKomatsu, HayatoTamaizumi, TerutakaItatsu, Yoshihiro
    • H02P21/00H02P21/04
    • H02P21/28B62D5/046H02P21/04
    • A motor is driven by the γ-axis current (I γ ) of a γδ coordinate system that is an imaginary rotating coordinate system. A command current value preparation unit (30) sets the γ-axis command current value (I γ *) based on the command steering torque (T*) and the detected steering torque (T). The command current value preparation unit (30) includes a command current increase/decrease amount calculation unit (30A) and an addition unit (30B). The command current increase/decrease amount calculation unit (30A) calculates the current increase/decrease amount (ΔI γ *) for the command current value (I γ *) based on the sign of the command steering torque (T*) and the deviation (ΔT (= T - T*)) of the detected steering torque (T) from the command steering torque (T*). The current increase/decrease amount (AI γ *) calculated by the command current increase/decrease amount calculation unit (30A) is added to the immediately preceding value (I γ *(n-1)) of the command current value (I γ *) by the addition unit (30B). Thus, the command current value (I γ *) in the present calculation cycle is calculated.
    • 电机由作为虚拟旋转坐标系的³'坐标系的³轴电流(I³)驱动。 指令当前值准备单元(30)基于指令转向转矩(T *)和检测到的转向转矩(T)来设定³轴指令当前值(I³*)。 指令电流值准备单元(30)包括指令电流增减量计算单元(30A)和加法单元(30B)。 指令电流增减量计算单元(30A)根据指令转向转矩(T *)的符号和指令转向转矩(T *)的符号计算指令电流值(I³*)的电流增减量(“I”*) 检测转向转矩(T)与指令转向转矩(T *)的偏差(“T(= T-T *)”)。 由指令电流增减量计算部(30A)算出的电流增减量(AI³*)与指令电流值(I³*(n-1))的前一值 *)通过加法单元(30B)。 因此,计算本计算周期中的指令电流值(I 3 *)。