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    • 53. 发明授权
    • Control method for cycloconverter and control apparatus therefor
    • 循环变频器的控制方法及其控制装置
    • US4670826A
    • 1987-06-02
    • US813985
    • 1985-12-27
    • Shigeru Tanaka
    • Shigeru Tanaka
    • H02M5/27H02M7/757
    • H02M7/7575Y02E60/60Y02P80/112
    • A control system for a cycloconverter of the circulating current type produces an ac current of a variable frequency. The cycloconverter is configured to connect a power factor compensating capacitor at its receiving-end, thus to control a lagging reactive power due to a circulating current flowing in the cycloconverter so as to cancel a leading reactive power due to the power factor compensating capacitor. Such a control is carried out under the condition of an operation below the rated load. In contrast, under the condition of an operation above the rated load, a control is effected so that the circulating current flowing in the cycloconverter is substantially kept constant.
    • 用于循环电流型循环变换器的控制系统产生可变频率的交流电流。 循环变换器被配置为在其接收端连接功率因数补偿电容器,从而由于在循环换流器中流动的循环电流而控制滞后的无功功率,从而消除由于功率因数补偿电容器引起的引导无功功率。 这样的控制在低于额定负载的操作的条件下进行。 相反,在高于额定负载的操作的条件下,进行控制,使得在循环换流器中流动的循环电流基本保持恒定。
    • 54. 发明授权
    • Power converter apparatus and control method thereof
    • 电力变换装置及其控制方法
    • US4663702A
    • 1987-05-05
    • US784994
    • 1985-10-07
    • Shigeru Tanaka
    • Shigeru Tanaka
    • H02M5/45H02M7/17H02M7/48H02M5/40
    • H02M7/48H02M5/4505H02M7/17
    • A power converter apparatus has at least two converters CONV1 and CONV2. The DC side of each of the converters CONV1 and CONV2 is connected to a filtering capacitor Cd which serves as a DC power source for a load device LOAD. The AC side of the converter CONV1 is connected to the secondary winding of a first transformer TR1. The AC side of the converter CONV2 is connected to the secondary winding of a second transformer TR2. The primary winding of transformer TR1 is connected in series to the primary winding of transformer TR2. The series circuit of the primary windings of transformers TR1 and TR2 is coupled to an AC power supply SUP via a single AC reactor Ls. A control method of the invention is adapted to the power converter apparatus in which plural PWM converters are used. The phase of a modulating wave (carrier) of one PWM converter differs by a predetermined degree from that of another PWM converter.
    • 功率转换器装置具有至少两个转换器CONV1和CONV2。 每个转换器CONV1和CONV2的DC侧连接到用作负载装置LOAD的DC电源的滤波电容器Cd。 转换器CONV1的AC侧连接到第一变压器TR1的次级绕组。 转换器CONV2的AC侧连接到第二变压器TR2的次级绕组。 变压器TR1的初级绕组与变压器TR2的初级绕组串联连接。 变压器TR1和TR2的初级绕组的串联电路通过单个AC电抗器Ls耦合到AC电源SUP。 本发明的控制方法适用于使用多个PWM转换器的功率转换装置。 一个PWM转换器的调制波(载波)的相位与另一个PWM转换器的相位相差预定的程度。