公开(公告)号：US4688162A

公开(公告)日：1987-08-18

申请号：US841425

申请日：1986-03-19

申请人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Toshio Suzuki ,  Akiteru Ueda ,  Kenji Nandoh ,  Ikuo Okajima

发明人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Toshio Suzuki ,  Akiteru Ueda ,  Kenji Nandoh ,  Ikuo Okajima

IPC分类号： G05F1/70 ,  H02M3/00 ,  H02M3/157 ,  H02M7/06 ,  H02M7/12

CPC分类号： H02M3/157

摘要： A single phase, full wave diode bridge circuit is connected with a chopper on its DC output side. An output voltage of the chopper is smoothed by a smoothing capacitor and thereafter supplied for a load. A current control apparatus forms a current reference signal which is synchronized with an AC voltage applied to the bridge circuit and has a magnitude corresponding to a current flowing through the load and produces a deviation signal between the current reference signal and an actual AC input current of the bridge circuit. The chopper is controlled in accordance with the deviation signal so that the AC input current follows the current reference signal, whereby the power factor and the waveform of the AC input current in the bridge circuit are improved.

摘要翻译： 单相全波二极管桥式电路与直流输出侧的斩波器相连。 斩波器的输出电压由平滑电容器平滑化，然后供给负载。 电流控制装置形成与施加到桥式电路的AC电压同步的电流参考信号，并且具有与流过负载的电流相对应的大小，并产生电流参考信号与实际交流输入电流之间的偏差信号 桥电路。 根据偏差信号控制斩波器，使交流输入电流跟随电流参考信号，从而提高桥式电路中的交流输入电流的功率因数和波形。

公开(公告)号：US4599549A

公开(公告)日：1986-07-08

申请号：US723646

申请日：1985-04-16

申请人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Akiteru Ueda ,  Akira Ishibashi ,  Ikuo Okajima

发明人： Nobuyoshi Mutoh ,  Keijiro Sakai ,  Akiteru Ueda ,  Akira Ishibashi ,  Ikuo Okajima

IPC分类号： H02M7/5387 ,  H02P23/04 ,  H02P25/02 ,  H02P27/08 ,  H02P5/40

CPC分类号： H02P27/08 ,  H02M7/53875 ,  H02P23/04 ,  H02P25/024 ,  H02P27/047

摘要： An AC motor such as an induction motor or a synchronous motor is driven by a PWM inverter circuit. Power switching elements of the inverter circuit are ignited by PWM pulses resulting from comparison of a carrier wave signal with a sine wave modulation signal at a frequency proportional to a frequency setting signal so as to control the inverter circuit. A current polarity detector detects positive and negative components of a DC current flowing in the input side of the inverter circuit. The frequency setting signal is so corrected as to be decreased when only the positive current component flows in excess of one period of the carrier wave signal or increased when only the negative current component flows in excess of the one period.

摘要翻译： 诸如感应电动机或同步电动机的AC电动机由PWM逆变电路驱动。 逆变器电路的电源开关元件由PWM脉冲点燃，脉冲是以与频率设定信号成比例的频率比较载波信号与正弦波调制信号，从而控制逆变器电路。 电流极性检测器检测在逆变器电路的输入侧流动的直流电流的正和负分量。 当只有正电流分量流过超过载波信号的一个周期时，频率设定信号被校正为减小，或者仅在负电流分量流过超过一个周期时增加。