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公开(公告)号：US06906501B2
公开(公告)日：2005-06-14
申请号：US10434207
申请日：2003-05-09
申请人： Chin-Chang Wu , Hurng-Liang Chou , Nan-Ying Shen , Yao-Jen Chang
发明人： Chin-Chang Wu , Hurng-Liang Chou , Nan-Ying Shen , Yao-Jen Chang
CPC分类号： H02M3/1584
摘要： A control method for the parallel-connected power converters includes a control circuit comprising a voltage feedback circuit and a current feed-forward circuit. The voltage feedback circuit, consisting of a voltage regulated control circuit and a waveform control circuit, is used to control the power converter's output voltage with constant amplitude and low total harmonic distortion. By adjusting the gain of waveform control circuit, it can regulate the current distribution among the parallel-connected power converters. The current feed-forward circuit separates the power converter's output current into the fundamental component and the harmonic component, and amplifies them by different gain. The amplified fundamental component acts as a fundamental resistor to suppress the circulating current among the parallel-connected power converters, and the amplified harmonic component acts as a harmonic damper for preventing from high frequency oscillation generated by the L-C filter.
摘要翻译： 并联电力转换器的控制方法包括：电压反馈电路和电流前馈电路的控制电路。 电压反馈电路由电压调节控制电路和波形控制电路组成，用于以恒定幅度和低总谐波失真来控制功率转换器的输出电压。 通过调整波形控制电路的增益，可以调节并联电源转换器之间的电流分布。 电流前馈电路将功率转换器的输出电流分为基波分量和谐波分量，并通过不同的增益进行放大。 放大的基波分量作为基波电阻来抑制并联功率转换器中的循环电流，并且放大的谐波分量作为用于防止由L-C滤波器产生的高频振荡的谐波阻尼器。
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公开(公告)号：US07345380B2
公开(公告)日：2008-03-18
申请号：US10878268
申请日：2004-06-29
申请人： Ya-Tsung Feng , Chin-Chang Wu , Hung-Liang Chou , Nan-Ying Shen , Kuo-Fang Huang , Yao-Jen Chang
发明人： Ya-Tsung Feng , Chin-Chang Wu , Hung-Liang Chou , Nan-Ying Shen , Kuo-Fang Huang , Yao-Jen Chang
CPC分类号： H02J9/062 , H02J2009/068 , Y10T307/615 , Y10T307/62 , Y10T307/696
摘要： A backup power supply system supplies power from a first ac power source in normal condition. Once the first ac power source is abnormal or fails, the system automatically turns off the first ac power source and turns on a second ac power source with null transfer time. When the first ac power source is normal, a dc/ac power inverter is controlled to supply an approximately null current such that a mechanical switch is allowed to be closed and no circulating current is generated between the first ac power source and the dc/ac power inverter. Since the mechanical switch is continuously closed, and requires no switching operation, the backup power supply system can supply the backup power with a null transfer time.
摘要翻译： 备用电源系统在正常状态下从第一交流电源供电。 一旦交流电源出现异常或故障，系统会自动关闭第一个交流电源，并以空的传输时间打开第二个交流电源。 当第一交流电源正常时，控制直流/交流电源逆变器以提供大致零电流，使得允许机械开关闭合，并且在第一交流电源和直流/交流之间不产生循环电流 电源逆变器。 由于机械开关连续关闭，无需切换操作，备用电源系统可以提供空转传送时间的备用电源。
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公开(公告)号：US20050088043A1
公开(公告)日：2005-04-28
申请号：US10878268
申请日：2004-06-29
申请人： Ya-Tsung Feng , Chin-Chang Wu , Hung-Liang Chou , Nan-Ying Shen , Kuo-Fang Huang , Yao-Jen Chang
发明人： Ya-Tsung Feng , Chin-Chang Wu , Hung-Liang Chou , Nan-Ying Shen , Kuo-Fang Huang , Yao-Jen Chang
CPC分类号： H02J9/062 , H02J2009/068 , Y10T307/615 , Y10T307/62 , Y10T307/696
摘要： A backup power supply system supplies power from a first ac power source in normal condition. Once the first ac power source is abnormal or failed, the system automatically turns off the first ac power source and turns on a second ac power source with null transfer time. When the first ac power source is normal, a dc/ac power inverter is controlled to supply an approximately null current that a mechanical switch is allowed to being closed and no circulating current is generated between the first ac power source and the dc/ac power inverter. Since the mechanical switch is successively closed, and it requires no switching operation, the backup power supply system can supply the backup power with a null transfer time.
摘要翻译： 备用电源系统在正常状态下从第一交流电源供电。 一旦交流电源出现异常或故障，系统会自动关闭第一交流电源，并打开第二个交流电源，传输时间不变。 当第一交流电源正常时，控制直流/交流电源逆变器以提供近似为零的电流，使机械开关被允许闭合，并且在第一交流电源和直流/交流电源之间不产生循环电流 逆变器。 由于机械开关连续关闭，不需要切换操作，备用电源系统可以提供空转传送时间的备用电源。
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