公开(公告)号：US5175483A

公开(公告)日：1992-12-29

申请号：US763144

申请日：1991-09-20

申请人： Hiroshi Fujii ,  Atsuhiko Nakamura ,  Takatsugu Kambara ,  Satoshi Ibori

发明人： Hiroshi Fujii ,  Atsuhiko Nakamura ,  Takatsugu Kambara ,  Satoshi Ibori

IPC分类号： H02P27/06 ,  H02P21/00 ,  H02P27/04

CPC分类号： H02P21/143 ,  H02P21/13 ,  H02P21/16 ,  H02P27/047 ,  H02P21/00

摘要： In a motor speed controller for controlling an AC motor to be driven at a variable speed, a signal proportional to a load torque and a signal proportional to an output torque of the AC motor are found by current detecting means for detecting the primary current of the AC motor, and integrated over the speed changing period, and the integrated values are divided by the values corresponding to the amounts of speed change during the speed changing period so that the moment of inertia can be computed. In addition, there is provided means for changing the rate of output frequency change caused by the output frequency command into a value according to the calculated moment of inertia. Moreover, there is provided a circuit for detecting a sudden change of the calculated moment of inertia, so that when a sudden change occurs, an abnormality signal is generated.

公开(公告)号：US5177678A

公开(公告)日：1993-01-05

申请号：US701033

申请日：1991-05-16

申请人： Satoshi Ibori ,  Noritoshi Tuzi ,  Yasumasa Toudou ,  Hiroshi Fujii ,  Takatsugu Kambara

发明人： Satoshi Ibori ,  Noritoshi Tuzi ,  Yasumasa Toudou ,  Hiroshi Fujii ,  Takatsugu Kambara

IPC分类号： H02M7/48 ,  H02P27/06

CPC分类号： H02M7/53873

摘要： An inverter apparatus using a microcomputer control system suitable for use in driving an ac rotary electric machine is concerned. The inverter apparatus includes a device for detecting an output current or an output voltage of the inverter apparatus or a control signal supplied to the inverter apparatus and, from the detected result, detecting an output frequency of the inverter apparatus and a switch structure having memory function by means of change-over and selection of lines for holding data for setting therein an upper limit of the output frequency of the inverter apparatus in hardware manner. Thus, the device for detecting the output frequency of the inverter apparatus produces the output frequency of the inverter apparatus and the switch structure produces the exact upper limit of the output frequency which is not influenced by noise or the like. The comparison therebetween can suppress the output frequency of the inverter apparatus to the upper limit always reliably without permanent change due to noise or the like and a fear of changing data so that occurrence of over-rotational speed operation of the driven ac rotary electric machine can be prevented sufficiently.

摘要翻译： 涉及一种使用适用于驱动交流旋转电机的微计算机控制系统的逆变器装置。 逆变器装置包括用于检测逆变器装置的输出电流或输出电压或提供给逆变器装置的控制信号的装置，并且从检测结果检测逆变器装置的输出频率和具有存储功能的开关结构 通过切换和选择用于保持数据的线，以硬件方式设置逆变器装置的输出频率的上限。 因此，用于检测逆变器装置的输出频率的装置产生逆变器装置的输出频率，并且开关结构产生不受噪声等影响的输出频率的精确上限。 其之间的比较可以将逆变器装置的输出频率总是可靠地抑制到上限，而不会由于噪声等而导致永久性变化，并且担心数据变化，从而使从动交流旋转电机的过转速运行的发生可以 充分防止。

公开(公告)号：US5465202A

公开(公告)日：1995-11-07

申请号：US205082

申请日：1994-03-03

申请人： Satoshi Ibori ,  Hitoshi Yamashita ,  Shigeyuki Baba ,  Hiroshi Fujii ,  Takatsugu Kambara ,  Akira Ishibashi

发明人： Satoshi Ibori ,  Hitoshi Yamashita ,  Shigeyuki Baba ,  Hiroshi Fujii ,  Takatsugu Kambara ,  Akira Ishibashi

IPC分类号： H02P3/22 ,  H02H3/247 ,  H02H7/12 ,  H02P27/06 ,  H02P27/08 ,  H02M5/45

CPC分类号： H02P27/08 ,  H02H3/247 ,  H02H7/1216 ,  H02P27/047

摘要： In a variable frequency power source unit, a series circuit of a contactless semiconductor switching element and a resistor is provided in parallel to a d.c. smoothing capacitor, and a control circuit is provided for receiving a signal for turning on the switching element selectively at any time after the power source is interrupted, thereby discharging the electric charge on the d.c. smoothing capacitor.

摘要翻译： 在可变频率电源单元中，非接触式半导体开关元件和电阻器的串联电路与直流电源并联设置。 平滑电容器，并且提供控制电路，用于在电源中断之后的任何时间选择性地接收用于接通开关元件的信号，从而在直流电上放电。 平滑电容器。