公开(公告)号：US5381328A

公开(公告)日：1995-01-10

申请号：US142994

申请日：1993-10-29

申请人： Kazuyoshi Umezawa ,  Osamu Sato

发明人： Kazuyoshi Umezawa ,  Osamu Sato

IPC分类号： H02M7/48 ,  H02M1/12

CPC分类号： H02M7/493 ,  H02M7/53871

摘要： A PWM inverter system having a sine (low-pass) filter. The sine filter includes a reactor and a capacitor, and is connected to the output of a PWM inverter. The instantaneous current flowing through the capacitor, and the instantaneous output current supplied from the sine filter to a load are detected. An instantaneous voltage command value is corrected on the basis of the detected current values. This makes it possible to limit oscillating waveforms involved in the output voltage of the PWM inverter without using a damping circuit which was connected in parallel with the capacitor in a conventional sine filter. The capacitor of the sine filter may be composed of a plurality of capacitors connected in parallel, and this will serve to further reduce the size of the sine filter. In a parallel operation of a plurality of PWM inverters, a cross current, that is, the difference between an instantaneous output current command value and an instantaneous capacitor current command value is reduced by correcting the instantaneous voltage command value. This makes it possible to share the current assigned to each PWM inverter with high stability.

摘要翻译： 具有正弦（低通）滤波器的PWM逆变器系统。 正弦滤波器包括电抗器和电容器，并连接到PWM逆变器的输出端。 检测流过电容器的瞬时电流以及从正弦滤波器向负载提供的瞬时输出电流。 基于检测到的电流值来校正瞬时电压指令值。 这使得可以限制PWM逆变器的输出电压中涉及的振荡波形，而不用在常规正弦滤波器中与电容器并联连接的阻尼电路。 正弦滤波器的电容器可以由并联连接的多个电容器组成，这将用于进一步减小正弦滤波器的尺寸。 在多个PWM逆变器的并联运行中，通过校正瞬时电压指令值来减小交流电，即瞬时输出电流指令值与瞬时电容电流指令值之间的差。 这使得可以以高稳定性共享分配给每个PWM逆变器的电流。

公开(公告)号：US08743571B2

公开(公告)日：2014-06-03

申请号：US13271141

申请日：2011-10-11

申请人： Toshiya Yamada ,  Kansuke Fujii ,  Kazuyoshi Umezawa ,  Masaki Katoh ,  Motohiro Katayama

发明人： Toshiya Yamada ,  Kansuke Fujii ,  Kazuyoshi Umezawa ,  Masaki Katoh ,  Motohiro Katayama

IPC分类号： H02M1/12 ,  H02M1/14

CPC分类号： H02J3/01 ,  H02J3/383 ,  H02J3/386 ,  Y02E10/563 ,  Y02E10/763 ,  Y02E40/40

摘要： A distributed power supply system in which no simultaneous disconnection from the system occurs when a system voltage momentarily drops is provided. It includes an inverter circuit that converts a direct current power generated by a direct current power supply and that supplies the alternating current power to an alternating current power supply power system, and an inverter control circuit for carrying out PWM control of the inverter circuit, wherein the inverter control circuit includes a three-phase voltage command signal generation unit, that is configured of a three-phase fundamental wave signal generation unit that generates three-phase fundamental wave signals from two phase components of voltage detected by a voltage detector, and a third harmonic signal generation unit that adds together third harmonic components of respective phases, having a predetermined amplitude, generated based on the three-phase fundamental wave signals.

摘要翻译： 一种分布式供电系统，其中当系统电压瞬时下降时，不发生同时断开系统。 它包括一个逆变器电路，其将由直流电源产生的直流电力转换并将交流电力提供给交流电源电力系统;以及逆变器控制电路，用于执行逆变器电路的PWM控制，其中 逆变器控制电路包括三相电压指令信号生成单元，该三相电压指令信号生成单元由三相基本信号生成单元构成，该三相基本信号生成单元从由电压检测器检测的电压的两相分量生成三相基波信号， 三次谐波信号生成单元，其将具有预定幅度的各相的三次谐波分量相加，基于三相基本信号产生。