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    • 1. 发明公开
    • POWER CONVERSION CIRCUIT
    • STROMWANDLUNGSKREIS
    • EP2051363A1
    • 2009-04-22
    • EP07792231.8
    • 2007-08-02
    • TOYOTA JIDOSHA KABUSHIKI KAISHA
    • OHTANI, HirokiOKAMURA, Masaki
    • H02M7/48
    • H02M1/38H02M2001/385
    • A desired current is permitted to flow in a coil (14) by controlling switching of switching elements (18, 20) by a PWM controller (60). For a voltage sensor (42), a value of Vo-ΔV, which is a difference between a midpoint voltage Vo of the switching elements (18, 20) and a previously determined threshold voltage ΔV, and a value of Vo-(Vc-ΔV), which is a difference between the midpoint voltage and a value obtained by subtracting the threshold voltage ΔV from a voltage Vc of an upper line, are detected. The detection results obtained from the voltage sensor are inputted to the PWM controller (60) through flip-flop circuits (44, 46) and a dead time compensator (48), and dead time compensation is performed, for instance, to an instruction for PWM control signal generation.
    • 通过PWM控制器(60)控制开关元件(18,20)的切换,允许期望的电流流入线圈(14)。 对于电压传感器(42),作为开关元件(18,20)的中点电压Vo与先前确定的阈值电压V之间的差值的Vo-“V值与Vo-( 检测中点电压与通过从上位线的电压Vc中减去阈值电压V而得到的值之间的差值Vc-“V”。 从电压传感器获得的检测结果通过触发器电路(44,46)和死区补偿器(48)输入到PWM控制器(60),并且执行死区时间补偿,例如, PWM控制信号产生。
    • 6. 发明公开
    • AC MOTOR DRIVE CONTROLLER
    • ANTRIEBSSTEUERUNGFÜRWECHSELSTROMMOTOR
    • EP2159909A1
    • 2010-03-03
    • EP08765821.7
    • 2008-06-18
    • Toyota Jidosha Kabushiki Kaisha
    • OHTANI, HirokiHANADA, HidetoNAKAMURA, MakotoYAMADA, Kenji
    • H02P6/08H02M7/48H02P21/00H02P27/04
    • H02M7/53875H02M7/5395H02M2001/0025H02P21/06H02P27/085
    • An overmodulation PWM controller includes: a voltage instruction calculation unit which calculates a d-axis voltage instruction and a q-axis voltage instruction in which a voltage amplitude exceeds a peak value of a triangular wave carrier; a voltage instruction correction unit which corrects the d-axis voltage instruction and the q-axis voltage instruction so that a pulse width modulation voltage applied to an AC motor has a basic wave amplitude based on the voltage instruction amplitude, according to the synchronization value K which is the number of the triangular carriers per one cycle of the phase voltage instruction; and a voltage instruction conversion unit which converts the corrected d-axis voltage instruction and the q-axis voltage instruction into a phase voltage instruction. The pulse width modulation voltage is controlled according to the result of comparison between the phase voltage instruction and the triangular wave carrier.
    • 过调制PWM控制器包括:电压指令计算单元,其计算电压幅度超过三角波载波的峰值的d轴电压指令和q轴电压指令; 电压指令校正单元,其根据同步值K校正d轴电压指令和q轴电压指令,使得施加到AC电动机的脉宽调制电压基于电压指令幅度具有基本波幅度 其是相电压指令的每一个周期的三角载波的数量; 以及电压指令转换单元,其将校正的d轴电压指令和q轴电压指令转换为相电压指令。 根据相电压指令与三角波载波的比较结果对脉宽调制电压进行控制。