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公开(公告)号：US08653823B2
公开(公告)日：2014-02-18
申请号：US13152360
申请日：2011-06-03
IPC分类号： G01R31/08
CPC分类号： H02M1/32
摘要： A system for the detection of welded contacts in a circuit of a line converter system has a plurality of inverter switches, a plurality of utility switches in which a pair of utility switches is connected in series through a line to a utility, a voltage detector, an electronic controller, and a DC input source. The line converter system converts incoming DC power into AC output power that is delivered to the utility grid. The voltage detector measures the voltage across a first node and a second node of the circuit and provides an output that is interpreted by an electronic controller for each step performed during a method of detection of welded contacts. The detection method has a sequence of test steps in which at least one switch is opened and/or closed, a DC bus of the inverter or the utility grid is used as a stimulus voltage, and the voltage is measured. If a voltage is not detected across the first and second nodes, the test sequence is continued until a welded contact is detected or the electronic controller determines that none of the contacts are welded. If the controller determines that none of the contacts are welded, the line converter system is permitted to connect and supply AC power to the utility.
摘要翻译： 用于检测线路转换器系统的电路中的焊接触点的系统具有多个逆变器开关，多个效用开关，其中一对效用开关通过线路串联连接到公用设施，电压检测器， 电子控制器和DC输入源。 线路转换器系统将输入的直流电力转换成交付输出功率，并输送到公用电网。 电压检测器测量电路的第一节点和第二节点上的电压，并提供由电子控制器解释的输出，用于在焊接触点的检测方法期间执行的每个步骤。 检测方法具有一系列测试步骤，其中至少一个开关被打开和/或关闭，逆变器或公用电网的DC总线用作激励电压，并且测量电压。 如果在第一和第二节点之间没有检测到电压，则继续测试序列直到检测到焊接接触点，或者电子控制器确定没有焊接接触点。 如果控制器确定没有一个触点被焊接，则允许线路转换器系统连接并向公用设施提供AC电力。
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公开(公告)号：US20110299312A1
公开(公告)日：2011-12-08
申请号：US13151766
申请日：2011-06-02
IPC分类号： H02M7/5387
CPC分类号： H02M7/487 , H02J3/383 , Y02E10/563
摘要： A full-bridge, NPC inverter uses pulse width modulation (PWM) to convert the DC voltage from a solar panel array to an AC voltage at the output of the inverter that is acceptable for connection to a utility. The PWM control unit has a predetermined carrier frequency. The carrier unit uses for each carrier period either positive or negative values of a reference voltage to generate a predetermined number of signals to control the switching on and off of each of the eight inverter switching elements in a predetermined pattern for a predetermined period of the carrier frequency period to thereby produce the acceptable alternating current voltage at the inverter output and not produce between the inverter input and earth ground a carrier frequency component.
摘要翻译： 全桥NPC逆变器使用脉冲宽度调制（PWM）将来自太阳能电池板阵列的直流电压转换为连接到公用设施可接受的逆变器输出端的交流电压。 PWM控制单元具有预定的载波频率。 载波单元在每个载波周期使用参考电压的正值或负值，以产生预定数量的信号，以在载波的预定时段内以预定模式控制八个逆变器开关元件中的每一个的开关 从而在逆变器输出端产生可接受的交流电压，并且不会在变频器输入和接地之间产生载波频率分量。
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公开(公告)号：US20110298470A1
公开(公告)日：2011-12-08
申请号：US13152360
申请日：2011-06-03
IPC分类号： G01R31/08
CPC分类号： H02M1/32
摘要： A system for the detection of welded contacts in a circuit of a line converter system has a plurality of inverter switches, a plurality of utility switches in which a pair of utility switches is connected in series through a line to a utility, a voltage detector, an electronic controller, and a DC input source. The line converter system converts incoming DC power into AC output power that is delivered to the utility grid. The voltage detector measures the voltage across a first node and a second node of the circuit and provides an output that is interpreted by an electronic controller for each step performed during a method of detection of welded contacts. The detection method has a sequence of test steps in which at least one switch is opened and/or closed, a DC bus of the inverter or the utility grid is used as a stimulus voltage, and the voltage is measured. If a voltage is not detected across the first and second nodes, the test sequence is continued until a welded contact is detected or the electronic controller determines that none of the contacts are welded. If the controller determines that none of the contacts are welded, the line converter system is permitted to connect and supply AC power to the utility.
摘要翻译： 用于检测线路转换器系统的电路中的焊接触点的系统具有多个逆变器开关，多个效用开关，其中一对效用开关通过线路串联连接到公用设施，电压检测器， 电子控制器和DC输入源。 线路转换器系统将输入的直流电力转换成交付输出功率，并输送到公用电网。 电压检测器测量电路的第一节点和第二节点上的电压，并提供由电子控制器解释的输出，用于在焊接触点的检测方法期间执行的每个步骤。 检测方法具有一系列测试步骤，其中至少一个开关被打开和/或关闭，逆变器或公用电网的DC总线用作激励电压，并且测量电压。 如果在第一和第二节点之间没有检测到电压，则继续测试序列直到检测到焊接接触点，或者电子控制器确定没有焊接接触点。 如果控制器确定没有一个触点被焊接，则允许线路转换器系统连接并向公用设施提供AC电力。
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公开(公告)号：US20120044730A1
公开(公告)日：2012-02-23
申请号：US13208995
申请日：2011-08-12
申请人： Mikko Paakkinen , Matti T. Jussila
发明人： Mikko Paakkinen , Matti T. Jussila
IPC分类号： H02M7/537
CPC分类号： H02M7/487 , H02J3/383 , H02M2001/123 , Y02E10/563
摘要： Exemplary embodiments are directed to an inverter and a method for controlling an inverter. The inverter includes a DC link having two capacitor units in series and a neutral point between the capacitor units, and a first and a second inverter leg. Both inverter legs are connected between the poles of the DC link and include four switching devices connected in series. Both inverter legs include an upper connection point between the two topmost switching devices, a lower connection point between the two bottommost switching devices, and an output between the two middle switching devices. Both inverter legs further include a first rectifier device connected between the DC link neutral point and the leg upper connection point, and a second rectifier device connected between the DC link neutral point and the leg lower connection point. Both inverter legs further include a third rectifier device connected between the upper connection point of the leg and the output of the other leg, and a fourth rectifier device connected between the output of the leg and the lower connection point of the other leg.
摘要翻译： 示例性实施例涉及一种用于控制逆变器的逆变器和方法。 逆变器包括具有串联的两个电容器单元和电容器单元之间的中性点以及第一和第二反相器支路的DC链路。 两个逆变器支脚连接在直流母线的极点之间，并包括串联连接的四个开关装置。 两个逆变器支路包括两个最上面的开关装置之间的上连接点，两个最下面的开关装置之间的下连接点和两个中间开关装置之间的输出。 两个逆变器支路还包括连接在DC链路中性点和腿部上部连接点之间的第一整流器装置，以及连接在DC链路中性点和腿部下部连接点之间的第二整流器装置。 两个逆变器脚还包括连接在腿的上连接点和另一腿的输出之间的第三整流器装置，以及连接在脚的输出端和另一支腿的下连接点之间的第四整流器装置。
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