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    • 4. 发明授权
    • Semiconductor power converter
    • 半导体功率转换器
    • US07919941B2
    • 2011-04-05
    • US12193209
    • 2008-08-18
    • Shigehisa AoyagiYoshitaka IwajiKazuaki TobariKiyoshi SakamotoDonsheng Li
    • Shigehisa AoyagiYoshitaka IwajiKazuaki TobariKiyoshi SakamotoDonsheng Li
    • H02P23/00
    • H02M7/53873H02M2001/0009H02P21/00
    • A semiconductor power converter includes a power converter for converting direct current to three-phase alternating current or vice versa; a means for detecting a current in an alternating current side of the power converter; a means for providing a current reference in the alternating current side of the power converter; a current controller for calculating a voltage reference in the alternating current side of the power converter to match the current reference and a value of the detected current; and a pulse width modulation means for controlling the power converter through pulse width modulation based on the voltage reference, wherein the current reference is used in place of the value of the detected current for at least one phase current among three phase currents in the alternating current side.
    • 半导体功率转换器包括用于将直流电流转换为三相交流电的功率转换器,反之亦然; 用于检测电力转换器的交流侧的电流的装置; 用于在电力转换器的交流侧提供电流基准的装置; 电流控制器,用于计算所述功率转换器的交流侧的电压参考以匹配所述电流基准和所述检测电流的值; 以及脉冲宽度调制装置,用于通过基于所述参考电压的脉宽调制来控制所述功率转换器,其中使用所述电流基准代替所述交流电流中的三相电流中的至少一相电流的检测电流的值 侧。
    • 9. 发明授权
    • Synchronous electric motor drive system
    • 同步电动机驱动系统
    • US08766575B2
    • 2014-07-01
    • US13816296
    • 2011-07-26
    • Yoshitaka IwajiShigehisa AoyagiKazuaki TobariRyoichi Takahata
    • Yoshitaka IwajiShigehisa AoyagiKazuaki TobariRyoichi Takahata
    • H02P6/18
    • H02P21/04H02P6/14H02P6/18H02P6/20H02P6/28H02P23/03H02P27/08
    • A synchronous electric motor drive system capable of driving at speeds near zero is provided. An energization mode determination unit switches six energization modes successively based on a terminal potential detected of the de-energized phase of a three-phase synchronous electric motor or on a stator winding wire connection point potential (neutral point potential) detected of the three-phase synchronous transmission unit. A voltage command correction unit corrects by a correction amount ΔV an applied voltage command destined for the synchronous electric motor to supply the synchronous electric motor with a repeated waveform of a positive pulse, negative pulse, and zero voltage as a line voltage waveform of the energized phases in each of the six energization modes, the positive pulse voltage being polarized to cause the synchronous electric motor to generate a forward rotation torque, the negative pulse voltage causing the synchronous electric motor to generate a reverse rotation torque.
    • 提供能够以接近零的速度行驶的同步电动机驱动系统。 通电模式确定单元基于检测到三相同步电动机的去电相位的终端电位或者检测到的三相同步电动机的定子绕组线连接点电位(中性点电位),连续地切换六个通电模式 同步传输单元。 电压指令校正单元通过校正量Dgr校正; V是用于同步电动机的施加电压指令,向同步电动机提供正脉冲,负脉冲和零电压的重复波形作为线电压波形 在六个通电模式中的每一个中的通电相位,正脉冲电压被极化以使同步电动机产生正向转矩,负脉冲电压引起同步电动机产生反向转矩。
    • 10. 发明申请
    • Driving System For Synchronous Motor
    • 同步电机驱动系统
    • US20140077738A1
    • 2014-03-20
    • US14116263
    • 2011-05-13
    • Yoshitaka IwajiShigehisa AoyagiRyoichi TakahataKazuaki Tobari
    • Yoshitaka IwajiShigehisa AoyagiRyoichi TakahataKazuaki Tobari
    • H02P6/18
    • H02P6/187H02P21/04H02P21/24H02P27/08
    • A position sensor-less driving method is provided that can drive rotation speed/torque control of a permanent magnet motor using an inverter with an ideal sinusoidal current with the minimum number of switching, and can drive at a speed as low as an extremely low speed region close to zero speed. A neutral point potential of a permanent magnet motor is detected in synchronization with PWM waveform of the inverter. A rotor position of the permanent magnet motor is estimated from change of the neutral point potential. When the neutral point potential is detected, timing of each phase of the PWM waveform is shifted to generate three or four types of switch states of which output voltage of the inverter is not zero vector, and neutral point potentials in at least two types of switch states among them are sampled, whereby rotor position of the three-phase synchronous motor is estimated.
    • 提供一种无位置传感器驱动方法,其可以使用具有最小切换次数的理想正弦电流的逆变器来驱动永磁电动机的转速/转矩控制,并且可以以极低速度的速度驱动 区域接近零速度。 与变频器的PWM波形同步地检测永磁电动机的中性点电位。 根据中性点电位的变化估计永磁电动机的转子位置。 当检测到中性点电位时,PWM波形的每相的定时被移位以产生三个或四种类型的开关状态,其中逆变器的输出电压不为零矢量,并且至少两种开关中的中性点电位 对其中的状态进行采样,由此估计三相同步电动机的转子位置。