公开(公告)号：US5099409A

公开(公告)日：1992-03-24

申请号：US496302

申请日：1990-03-20

申请人： Akira Bando ,  Chikara Tanaka ,  Keiji Saito ,  Tadao Kawai ,  Eizo Kita ,  Keiichi Mitsuhashi ,  Yasuteru Ohno ,  Hiroto Nakagawa

发明人： Akira Bando ,  Chikara Tanaka ,  Keiji Saito ,  Tadao Kawai ,  Eizo Kita ,  Keiichi Mitsuhashi ,  Yasuteru Ohno ,  Hiroto Nakagawa

IPC分类号： H02H7/12 ,  H02H7/122 ,  H02H7/125 ,  H02M7/162 ,  H02P9/00

CPC分类号： H02M7/1623 ,  H02H7/1255

摘要： An improved electric power conversion system comprising a multi-phase bridge circuit composed of semiconductors such as thyristors and an associated firing circuit. It is so constructed that: if the AC input current Iac flowing in the bridge circuit is equal to or larger in value that the DC output current Idc flowing out of the bridge circuit, it will be decided than an inner defect or fault is caused, and possible expansion of inner defect will be prevented by disabling the firing circuit to extinguish the thyristors in the bridge circuit, and if the AC input current Iac is smaller than the DC output current Idc in value, the bridge is permitted to continue the operation of power conversion, thus eliminating unnecessary interruption which otherwise would be caused by exterior disturbances. Also, an improved electric power conversion system may be equipped with a device to prevent an adverse effect from being caused by abnormal rise of thyristors' temperature.

公开(公告)号：US5148093A

公开(公告)日：1992-09-15

申请号：US584153

申请日：1990-09-18

申请人： Akira Bando ,  Shigehiro Kayukawa ,  Toshio Taguchi ,  Yasuteru Ohno ,  Junichi Shiozaki, deceased ,  Junko Shiozaki

发明人： Akira Bando ,  Shigehiro Kayukawa ,  Toshio Taguchi ,  Yasuteru Ohno ,  Junichi Shiozaki, deceased ,  Junko Shiozaki

IPC分类号： H02P9/00 ,  H02P9/04 ,  H02P9/10 ,  H02P9/42

CPC分类号： H02P29/025 ,  H02P9/10 ,  H02P9/42 ,  H02P2101/10

摘要： A control system for an AC excited synchronous machine for use in an electricity generator/motor system. The AC excited synchronous machine can be driven not only in a variable-speed operation based on 2-axis current control but also in a constant exciting frequency operation based on only direct-axis current component control. A phase signal is switched to drive stably the AC excited synchronoius machine in a self-excited operation or in a rotary phase modifying operation. Further, when it is desired to start pumping-up water, a synchronizing power is provided to keep constant the rotational speed of the machine at the time of establishing a desired water pressure. Because of the switching arrangement of the phase signal, the AC excited synchronous machine can be operated as an ordinary synchronous machine exhibiting ordinary synchronous characteristics, that is, self-excited operation characteristics, rotary phase modifying operation characteristics and pumping-up start characteristics. Even when the synchronous machine is cutoff from an AC power system and the voltage of the synchronous machine is abruptly changed, the stable self-excited operation of the machine can be realized.

摘要翻译： 一种用于发电机/电机系统的交流励磁同步电机的控制系统。 交流励磁同步电机不仅可以在基于2轴电流控制的变速运行中进行驱动，而且还可以在仅基于直轴电流分量控制的恒定励磁运行中驱动。 切换相位信号以在自激操作或旋转相位修正操作中稳定地驱动AC激励同步机。 此外，当需要开始泵送水时，提供同步功率以在建立期望的水压时保持机器的转速恒定。 由于相位信号的开关布置，交流励磁同步电机可以作为普通同步电机工作，具有普通同步特性，即自激运行特性，旋转相位调整运行特性和起动启动特性。 即使同步电机从交流电源系统断开并且同步电机的电压突然变化，也可以实现机器的稳定的自激操作。