-
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。
-
公开(公告)号：US06876178B2
公开(公告)日：2005-04-05
申请号：US10626519
申请日：2003-07-25
申请人： Chin-Chang Wu , Hurng-Liang Chou , Wen-Pin Hsu , Yao-Jen Chang
发明人： Chin-Chang Wu , Hurng-Liang Chou , Wen-Pin Hsu , Yao-Jen Chang
CPC分类号： G05F1/70
摘要： A hybrid reactive power compensation device comprises a passive type reactive power compensator and an active type reactive power compensator serially connected thereto. The passive type reactive power compensator is an AC power capacitor adapted to provide the reactive power that reduces capacity of the active type reactive power compensator. The active type reactive power compensator is consisted of a power converter, a DC capacitor, a high-frequency ripple filter and a controller. The hybrid reactive power compensation device can supply a linearly adjustable reactive power within a predetermined range, and is adapted to provide with a serial-connected virtual harmonic damping. Therefore, it can avoid the destruction of AC power capacitor caused by the power resonance.
摘要翻译： 混合无功功率补偿装置包括无源式无功功率补偿器和与其串联的有源型无功功率补偿器。 无源型无功功率补偿器是适于提供无功功率的AC功率电容器，其降低有源型无功功率补偿器的容量。 有源型无功补偿器由功率转换器，直流电容器，高频纹波滤波器和控制器组成。 混合无功补偿装置可以在预定范围内提供线性可调的无功功率，并且适于提供串联连接的虚拟谐波阻尼。 因此，可以避免由功率谐振引起的交流电源电容的破坏。
-
公开(公告)号：US06717465B2
公开(公告)日：2004-04-06
申请号：US10331766
申请日：2002-12-31
申请人： Hurng-Liang Chou , Chin-Chang Wu , Ya-Tsung Feng , Yao-Jen Chang
发明人： Hurng-Liang Chou , Chin-Chang Wu , Ya-Tsung Feng , Yao-Jen Chang
IPC分类号： H03F126
摘要： An active harmonic suppression equipment is consisted of a dc capacitor, a power converter, a serially connected inductor/capacitor set, a C-R-C filter set and a control circuit. The dc capacitor operates as an energy storage device and supplies a dc voltage, and the power converter electrically connected thereto is used to convert the dc voltage into a compensating voltage. The inductor/capacitor set and the C-R-C filter set are commonly converting the compensating voltage into a compensating current injecting into a power feeder in order to suppress harmonic currents generated by nonlinear loads, thereby adjusting an utility current to be approximated as a sine-wave.
摘要翻译： 主动谐波抑制设备由直流电容器，功率转换器，串联电感器/电容器组，C-R-C滤波器组和控制电路组成。 直流电容器用作能量存储装置并提供直流电压，并且与其电连接的功率转换器用于将直流电压转换成补偿电压。 电感器/电容器组和C-R-C滤波器组通常将补偿电压转换成馈电器中的补偿电流，以便抑制由非线性负载产生的谐波电流，从而调节公用电流近似为正弦波。
-
公开(公告)号：US06801023B2
公开(公告)日：2004-10-05
申请号：US10420812
申请日：2003-04-23
IPC分类号： G05F1656
CPC分类号： H02M3/155 , H02J9/062 , H02M1/36 , H02M2001/0022 , H02M2001/0093
摘要： A DC/DC boost converter is consisted of an inductor, a power electronic switch, a control circuit, a first diode, a second diode and a capacitor. The power electronic switch is not operated if the input DC voltage is higher than the specified low reference DC voltage and it is regarded as the normal input DC voltage. If the input DC voltage is lower than the specified low reference DC voltage and this condition is regarded as the abnormal input DC voltage, the power electronic switch is controlled by pulse width modulation control and a dc voltage across the capacitor is created. Then, the output DC voltage is the summation of the input DC voltage and the capacitor voltage. Thus, the inventive DC/DC boost converter operates only when the input DC voltage is abnormal, thereby avoid additional power loss in the duration of normal input DC voltage.
摘要翻译： DC / DC升压转换器由电感器，电力电子开关，控制电路，第一二极管，第二二极管和电容器组成。 如果输入直流电压高于指定的低参考直流电压，则电源电子开关不工作，并被视为正常输入直流电压。 如果输入直流电压低于指定的低基准直流电压，该条件被视为异常输入直流电压，则电力电子开关由脉宽调制控制控制，并产生电容器两端的直流电压。 然后，输出直流电压是输入直流电压和电容器电压的总和。 因此，本发明的DC / DC升压转换器仅在输入DC电压异常时才起作用，从而避免了在正常输入DC电压持续时间内的额外功率损耗。
-
公开(公告)号：US06982546B2
公开(公告)日：2006-01-03
申请号：US10646755
申请日：2003-08-25
申请人： Chin-Chang Wu , Hurng-Liang Chou , Wen-Pin Hsu , Yao-Jen Chang
发明人： Chin-Chang Wu , Hurng-Liang Chou , Wen-Pin Hsu , Yao-Jen Chang
IPC分类号： G05F1/70
CPC分类号： G05F1/70
摘要： A hybrid reactive power compensation device comprises a passive type reactive power compensator and an active type reactive power compensator serially connected thereto. The passive type reactive power compensator is an AC power capacitor adapted to provide the reactive power that reduces capacity of the active type reactive power compensator. The active type reactive power compensator comprises a power converter, a DC capacitor, a high-frequency ripple filter and a controller. The hybrid reactive power compensation device can supply a linearly adjustable reactive power within a predetermined range, and is adapted to supply a current with a nearly sinusoidal waveform. Therefore, it can avoid the destruction of AC power capacitor caused by the power resonance.
摘要翻译： 混合无功功率补偿装置包括无源式无功功率补偿器和与其串联的有源型无功功率补偿器。 无源型无功功率补偿器是适于提供无功功率的AC功率电容器，其降低有源型无功功率补偿器的容量。 有源型无功补偿器包括功率转换器，直流电容器，高频纹波滤波器和控制器。 混合无功补偿装置可以在预定范围内提供可线性调节的无功功率，并且适于提供具有接近正弦波形的电流。 因此，可以避免由功率谐振引起的交流电源电容的破坏。
-
公开(公告)号：US06876179B2
公开(公告)日：2005-04-05
申请号：US10424707
申请日：2003-04-29
申请人： Hurng-Liang Chou , Chin-Chang Wu , Wen-Pin Hsu , Yao-Jen Chang
发明人： Hurng-Liang Chou , Chin-Chang Wu , Wen-Pin Hsu , Yao-Jen Chang
CPC分类号： G05F1/70
摘要： A hybrid reactive power compensation device comprises a passive type reactive power compensator and an active type reactive power compensator serially connected thereto. The passive type reactive power compensator is an AC power capacitor adapted to provide the reactive power that reduces capacity of the active type reactive power compensator. The active type reactive power compensator is consisted of a power converter, a DC capacitor, a high-frequency ripple filter and a controller. The hybrid reactive power compensation device can supply a linearly adjustable reactive power within a predetermined range, and the supplied current is approximated to be a sinusoidal waveform. Therefore, it can avoid the destruction of AC power capacitor caused by the power resonance.
摘要翻译： 混合无功功率补偿装置包括无源式无功功率补偿器和与其串联的有源型无功功率补偿器。 无源型无功功率补偿器是适于提供无功功率的AC功率电容器，其降低有源型无功功率补偿器的容量。 有源型无功补偿器由功率转换器，直流电容器，高频纹波滤波器和控制器组成。 混合无功补偿装置可以在预定范围内提供线性可调无功功率，并且所提供的电流近似为正弦波形。 因此，可以避免由功率谐振引起的交流电源电容的破坏。
-
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。
-
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。
-
公开(公告)号：US07091704B2
公开(公告)日：2006-08-15
申请号：US11153533
申请日：2005-06-16
申请人： Hung-Liang Chou , Chin-Chang Wu , Wen-Pin Hsu , Ya-Tsung Feng , Yao-Jen Chang
发明人： Hung-Liang Chou , Chin-Chang Wu , Wen-Pin Hsu , Ya-Tsung Feng , Yao-Jen Chang
摘要： A three-phase three-wire active power filter includes a dc power capacitor, a power converter, a filter inductor set, a reactive power compensating capacitor set, a combined capacitor/resistor filtering set and a control circuit. The dc power capacitor provides with a regulated voltage. The power converter includes a two-arm bridge power converter, and has a pair of ac terminals and a pair of dc terminals. A phase of the three-phase three-wire active power filter, without control of the power electronic switch set, directly connects with any one of the dc terminals. Consequently, the number of power electronic switches employed in the two-arm bridge power converter of the three-phase three-wire active power filter can be reduced.
摘要翻译： 三相三线有源电力滤波器包括直流电力电容器，功率转换器，滤波电感器组，无功补偿电容器组，组合电容器/电阻滤波器组和控制电路。 直流电源电容提供稳压电压。 电力转换器包括一个双臂电力电力转换器，并具有一对交流端子和一对直流端子。 三相三线有源电力滤波器的一个阶段，无需电力电子开关组的控制，可直接与任何一个直流端子连接。 因此，可以减少三相三线有源电力滤波器的双臂电力变换器中使用的电力电子开关的数量。
-
公开(公告)号：US20060033479A1
公开(公告)日：2006-02-16
申请号：US11153533
申请日：2005-06-16
申请人： Hung-Liang Chou , Chin-Chang Wu , Wen-Pin Hsu , Ya-Tsung Feng , Yao-Jen Chang
发明人： Hung-Liang Chou , Chin-Chang Wu , Wen-Pin Hsu , Ya-Tsung Feng , Yao-Jen Chang
IPC分类号： G05F1/70
摘要： A three-phase three-wire active power filter includes a dc power capacitor, a power converter, a filter inductor set, a reactive power compensating capacitor set, a combined capacitor/resistor filtering set and a control circuit. The dc power capacitor provides with a regulated voltage. The power converter includes a two-arm bridge power converter, and has a pair of ac terminals and a pair of dc terminals. A phase of the three-phase three-wire active power filter, without control of the power electronic switch set, directly connects with any one of the dc terminals. Consequently, the number of power electronic switches employed in the two-arm bridge power converter of the three-phase three-wire active power filter can be reduced.
-
-
-
-
-
-
-
-
-
搜索结果
43 条记录 (耗时 0.033 秒)
