公开(公告)号：US5298848A

公开(公告)日：1994-03-29

申请号：US797956

申请日：1991-11-26

申请人： Shigeta Ueda ,  Takashi Ikimi ,  Mitsuyuki Hombu ,  Noboru Ogawa ,  Yorito Jifuku ,  Kenzo Kamiyama

发明人： Shigeta Ueda ,  Takashi Ikimi ,  Mitsuyuki Hombu ,  Noboru Ogawa ,  Yorito Jifuku ,  Kenzo Kamiyama

IPC分类号： H02M5/45 ,  H02M7/515 ,  H02M7/521 ,  H02M7/527 ,  H02P27/06 ,  H03K17/0814 ,  H02P7/00

CPC分类号： H03K17/08144 ,  H02M5/4505 ,  H02M7/527 ,  H02P21/0089 ,  H02P21/02 ,  H02P21/06 ,  H03K2217/0081

摘要： A large capacity (1-2 MkVA) driving system for variable-speed-driving an AC motor by a power converter (inverter, converter) in which GTO (gate turn-off) thyristors are used as switching devices. In this system, high frequency GTO thyristors are connected in series, power converters are multiplexed, the AC motor is used in its plural phases, instantaneous spatial vector PWM (pulse width modulation) control is performed, vector control for the motor is performed, and a circuit for recovering snubber energy for GTO thyristors and a power factor adjusting circuit are provided. Thus, this driving system provides a torque ripple of 1% or less, speed response of 60 rad/sec or more, efficiency of 95% or more and a power factor of 98% or more.

摘要翻译： 用于使用GTO（闸极关断）晶闸管作为开关装置的功率转换器（逆变器，转换器）来驱动交流电动机的大容量（1-2MkVA）驱动系统。 在该系统中，高频GTO晶闸管串联连接，电源转换器多路复用，交流电机用于多相，进行瞬时空间矢量PWM（脉宽调制）控制，执行电机矢量控制， 提供了用于恢复GTO晶闸管的缓冲能量的电路和功率因数调节电路。 因此，该驱动系统提供1％以下的转矩脉动，60rad / sec以上的速度响应，95％以上的效率和98％以上的功率因数。

公开(公告)号：US4306138A

公开(公告)日：1981-12-15

申请号：US42067

申请日：1979-05-24

申请人： Norikazu Tokunaga ,  Hisao Amano ,  Yorito Jifuku

发明人： Norikazu Tokunaga ,  Hisao Amano ,  Yorito Jifuku

IPC分类号： B23K11/25 ,  B23K11/24

CPC分类号： B23K11/256

摘要： A power supply apparatus for a resistance welder has an inverse-parallel thyristor circuit for constrolling the welding current. One of thyristors connected in inverse-parallel relationship is turned on by a first signal whose reference phase is established by a synchronizing signal which is based on a voltage wave form of an AC power source and the other thyristor is turned on by a second signal whose reference phase is established by a signal which is delayed half a period of the voltage wave form with respect to the first signal, so that integrals of positive and negative halves of the output voltage wave form of the inverse parallel thyristor circuit can always be made equal.

摘要翻译： 用于电阻焊机的电源装置具有用于保持焊接电流的逆并联晶闸管电路。 以反平行关系连接的晶闸管中的一个被第一信号接通，该第一信号的参考相位由基于AC电源的电压波形的同步信号建立，另一个晶闸管由第二信号接通， 参考相位由相对于第一信号的电压波形的半周期延迟的信号建立，使得逆并联晶闸管电路的输出电压波形的正和负半部的积分总是能够相等 。

公开(公告)号：US5446645A

公开(公告)日：1995-08-29

申请号：US19642

申请日：1993-02-18

申请人： Hidefumi Shirahama ,  Yorito Jifuku ,  Akira Kobayashi ,  Keizo Shimada ,  Norikazu Tokunaga ,  Yoshimi Sakurai ,  Ikuo Yamato ,  Tomoaki Mino ,  Satoru Inukai

发明人： Hidefumi Shirahama ,  Yorito Jifuku ,  Akira Kobayashi ,  Keizo Shimada ,  Norikazu Tokunaga ,  Yoshimi Sakurai ,  Ikuo Yamato ,  Tomoaki Mino ,  Satoru Inukai

IPC分类号： H02J3/46 ,  H02J9/06 ,  H02M7/48 ,  H02M7/493 ,  H02M7/515 ,  H02J3/38

CPC分类号： H02M7/493 ,  H02J3/46 ,  H02J9/062 ,  Y10T307/582 ,  Y10T307/707

摘要： In a uninterruptible power supply in which a plurality of inverters are operated in parallel, a current control loop is provided which responds to the magnitude of an output current of each inverter brought into parallel running to change a command value for a voltage waveform control circuit associated with each inverter, and the gain of the current control loop is made to be variable, whereby currents shared by the inverters can be set desirably to effectively suppress a cross current flowing between the inverters upon establishment of parallel running.

摘要翻译： 在并联运行多个逆变器的不间断电源中，提供电流控制回路，其响应于并联运行的每个逆变器的输出电流的大小，以改变相关联的电压波形控制电路的命令值 与每个逆变器相比，使电流控制回路的增益是可变的，从而可以期望设置由逆变器共享的电流，以便在建立并行运行时有效地抑制在逆变器之间流动的交叉电流。