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    • 3. 发明公开
    • DC to AC converter
    • 直流到交流转换器
    • EP2546973A3
    • 2017-10-04
    • EP12155312.7
    • 2012-02-14
    • Delta Electronics, Inc.
    • Ku, Chen-WeiLee, Lei-Ming
    • H02M7/5387H02M7/5388
    • A DC to AC converter includes a first switch (S1), a second switch (S2), a first half bridge inverter (130), and a second half bridge inverter (140). The first switch (S1) includes a first terminal and a second terminal. The second switch (S2) includes a first terminal and a second terminal. A portion between the first terminal of the first switch and the first terminal of the second switch is operable to receive a direct current power source (DC). The first half bridge inverter (130) includes a first terminal, a second terminal, and an output terminal. The second half bridge inverter (140) includes a first terminal, a second terminal, and an output terminal. A portion between the output terminal of the first half bridge inverter (130) and the output terminal of the second half bridge inverter (140) is operable to output an alternative current.
    • DC-AC转换器包括第一开关(S1),第二开关(S2),第一半桥逆变器(130)和第二半桥逆变器(140)。 第一开关(S1)包括第一端子和第二端子。 第二开关(S2)包括第一端子和第二端子。 第一开关的第一端子和第二开关的第一端子之间的部分可操作以接收直流电源(DC)。 第一半桥逆变器(130)包括第一端子,第二端子和输出端子。 第二半桥逆变器(140)包括第一端子,第二端子和输出端子。 第一半桥逆变器(130)的输出端子和第二半桥逆变器(140)的输出端子之间的部分可操作以输出替代电流。
    • 9. 发明公开
    • Three-phase transformerless DC to AC inverter
    • 变压器逆变器DC / AC Wechselrichter
    • EP2975757A1
    • 2016-01-20
    • EP14176886.1
    • 2014-07-14
    • ABB Technology AG
    • Li, Rinver-TinHoHuusari, JuhaHo, Ngai-ManBianda, Enea
    • H02M7/5388H02J1/10H02J3/38
    • H02M7/5388H02J1/10H02J3/383Y02E10/563
    • A DC to AC inverter (100) for inverting a direct current of a multitude of DC power sources (10A, 10B) to a three-phase alternating current of a three-phase grid (20) is provided. The DC to AC inverter comprises an inverting unit (120) with a first sub-inverter (130) and a second sub-inverter (140), wherein each of the first and second sub-inverters (130, 140) is configured to be provided with a DC current via a primary side (119) of the inverting unit (120). The first sub-inverter (130) is configured to provide a first AC current to a first AC output phase (122A) of the three-phase grid (20). The second sub-inverter (140) is configured to provide a second AC current to a second AC output phase (122B) of the three-phase grid (20). The inverting unit (120) is configured such that a magnitude of the first AC current and a magnitude of the second AC current are substantially equal and shifted 120° to each other. The first sub-inverter (130) and the second sub-inverter (140) are connected such that a third AC current is provided to a third AC output phase (122C) of the three-phase grid as a negative sum of the first AC current and the second AC current.
    • 提供了用于将多个DC电源(10A,10B)的直流电转换为三相电网(20)的三相交流电的DC至AC逆变器(100)。 直流到交流逆变器包括具有第一副逆变器(130)和第二子反相器(140)的反相单元(120),其中第一和第二副反相器(130,140)中的每一个被配置为 经由反相单元(120)的初级侧(119)设置有直流电流。 第一副逆变器(130)被配置为向三相网格(20)的第一AC输出相位(122A)提供第一AC电流。 第二副逆变器(140)被配置为向三相电网(20)的第二AC输出相(122B)提供第二AC电流。 反相单元(120)被配置为使得第一AC电流的大小和第二AC电流的大小基本相等并相互偏移120°。 第一副逆变器(130)和第二副逆变器(140)被连接成使得第三AC电流被提供给三相电网的第三AC输出相位(122C),作为第一AC 电流和第二个交流电流。
    • 10. 发明公开
    • Voltage source converter and control thereof
    • 电压源换流器及其控制
    • EP2924860A1
    • 2015-09-30
    • EP14161430.5
    • 2014-03-25
    • Alstom Technology Ltd.
    • Oates, ColinTrainer, David ReginaldDyke, Kevin
    • H02M1/15H02M7/5388H02M7/483
    • H02M5/458H02M1/12H02M1/14H02M1/15H02M7/217H02M7/219H02M7/483H02M7/487H02M7/493H02M7/5388H02M2001/0058H02M2007/4835Y02B70/1491
    • This application describes a voltage source converter (300) of the controlled transition bridge type, having three phase limbs, each phase limb having a high side director switch (S w1 , S W3 , S W5 ) and a low side director switch (S w4 , S W6 , S W2 ) connecting a respective DC terminal (DC+, DC-) to an AC node (102a-c) for that phase limb. Chain-link circuits (101 a-c) for each phase limb comprise a plurality of series connect cells (103), each cell having an energy storage element (105) that can be selectively connected in series or bypassed. The chain-link circuits are operated in a voltage mode to provide a defined voltage transition at the AC node during a transition between one director switch being turned off and the other directors switch being turned on. In embodiments of the invention the chain-link circuits (101 a-c) are connected to a common node such that, in use, a current can flow from one phase limb to another via the respective chain-link circuits. A converter controller (900) operates a chain-link circuit of a phase limb in a current mode to provide a defined chain-link current for at least part of the time when that phase limb is not in a transition state. The defined current can allow correct circulation of the DC current and/or provide capacitor balancing of the capacitors of a chain-link circuit. Additional chain-link circuits (301, 302) are provided between the DC terminals and the common node to provide a DC current in a converter state where all the high side or low side director switches are off at the same time.
    • 本申请描述了具有三个相臂的受控过渡桥类型的电压源转换器(300),每个相臂具有高侧导向器开关(Sw1,SW3,SW5)和低侧导向器开关(Sw4,SW6,SW2 )将相应的DC端子(DC +,DC-)连接到该相臂的AC节点(102a-c)。 用于每个相臂的链节电路(101a-c)包括多个串联连接单元(103),每个单元具有能够选择性地串联或旁路连接的能量存储元件(105)。 链节电路以电压模式操作,以在一个导向器开关断开和另一个导通开关导通之间的转换期间在AC节点处提供限定的电压转换。 在本发明的实施例中,链节电路(101a-c)连接到公共节点,使得在使用中,电流可以经由相应的链式链路电路从一个相位臂流到另一个。 转换器控制器(900)在当前模式下操作相臂的链式连接电路,以在该相臂不处于过渡状态时至少部分时间提供限定的链式电流。 限定的电流可以允许直流电流的正确循环和/或提供链环电路的电容器的电容器平衡。 在DC端子和公共节点之间提供额外的链式电路(301,302),以在所有高侧或低侧导向器开关同时断开的转换器状态下提供DC电流。