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    • 4. 发明授权
    • Control system for PWM inverter
    • PWM逆变器控制系统
    • US4767976A
    • 1988-08-30
    • US37853
    • 1987-04-13
    • Nobuyoshi MutohAkiteru UedaMotonobu HattoriSatoshi IboriHideyuki ShimonabeKenji Nandoh
    • Nobuyoshi MutohAkiteru UedaMotonobu HattoriSatoshi IboriHideyuki ShimonabeKenji Nandoh
    • H02P27/06H02P21/08H02P27/04H02P27/08H02P5/40
    • H02P27/08H02P27/047
    • A control system for controlling a PWM inverter so that the inverter drives an induction motor at a variable voltage and a variable frequency while keeping constant a ratio of the output voltage of the inverter to the output frequency thereof, is disclosed which includes current component detecting means for detecting an effective current corresponding to a load, from the input current of the induction motor, frequency setting means for setting the output frequency of the PWM inverter, flux setting means for setting the amount of magnetic flux generated in the induction motor, correcting-frequency calculating means for calculating a frequency correcting quantity proportional to the effective current, and correcting-flux calculating means for calculating a flux correcting quantity proportional to the effective current. In a case where the detected effective current is judged to be less than a predetermined value, the frequency correcting quantity is added to the set output frequency to obtain an output frequency command, and the sum of the flux correcting quantity and the set amount of magnetic flux is multiplied by the value of the output frequency command to obtain an output voltage command, for the purpose of controlling the operation of the PWM inverter on the basis of the output frequency command and the output voltage command.
    • 一种用于控制PWM逆变器的控制系统,使得逆变器以可变电压和可变频率驱动感应电动机,同时保持变频器的输出电压与其输出频率的比例恒定,其包括电流分量检测装置 用于从感应电动机的输入电流检测与负载相对应的有效电流;频率设定装置,用于设定PWM逆变器的输出频率;磁通设定装置,用于设定感应电动机中产生的磁通量, 频率计算装置,用于计算与有效电流成比例的频率校正量;以及校正磁通计算装置,用于计算与有效电流成比例的磁通校正量。 在检测到的有效电流被判断为小于预定值的情况下,将频率校正量与设定的输出频率相加,得到输出频率指令,并且磁通校正量与设定的磁场量之和 为了根据输出频率指令和输出电压指令来控制PWM逆变器的运行,磁通量乘以输出频率指令的值以获得输出电压指令。
    • 8. 发明授权
    • Gate drive power source for electric power converter
    • 电力转换器的栅极驱动电源
    • US5424937A
    • 1995-06-13
    • US073392
    • 1993-06-09
    • Ryuji IyotaniAkiteru UedaHiroshi NaritaMitsuyuki HombuHidetoshi Aizawa
    • Ryuji IyotaniAkiteru UedaHiroshi NaritaMitsuyuki HombuHidetoshi Aizawa
    • H02J7/34H02M1/08H02M1/088H02M7/757H03K17/00H03K17/0814H02M7/521
    • H03K17/08144H02M1/08H02M1/088H03K2217/0036H03K2217/0081
    • An electric power converter comprising a plurality of reactors, a plurality of self quenching type switching elements, the reactors and switching elements being series-connected per one arm, and surge-absorbing snubber circuits connected in parallel to the switching elements respectively, the switching circuits being driven by gate drive circuits connected to respective gates of the switching elements to thereby convert a DC voltage into an AC voltage or convert an AC voltage into a DC voltage. The electric power converter further comprises: an apparatus for recovering energy accumulated on at least one side of the reactors and the snubber circuits and an apparatus for generating a DC source for supplying electric power to each of the gate drive circuits, on the basis of the recovered energy. In the electric power converter constituted by a plurality of self quenching type semiconductor switching elements connected in series, high efficiency is attained through reduction in size of the gate driver and electric power saving.
    • 一种电力转换器,包括多个反应器,多个自熄型开关元件,每个臂串联连接的电抗器和开关元件以及分别与开关元件并联连接的浪涌吸收缓冲电路,开关电路 由连接到开关元件的各个栅极的栅极驱动电路驱动,从而将DC电压转换为AC电压或将AC电压转换为DC电压。 电力转换器还包括:用于回收积聚在电抗器的至少一侧的能量的装置和缓冲电路,以及用于产生用于向每个栅极驱动电路提供电力的DC源的装置, 恢复能量。 在由串联连接的多个自熄型半导体开关元件构成的电力转换器中,通过减小栅极驱动器的尺寸和节省电力来实现高效率。