公开(公告)号：US09368960B2

公开(公告)日：2016-06-14

申请号：US14257482

申请日：2014-04-21

Applicant: ABB RESEARCH LTD.

Inventor： Hans Peter Nee

IPC: H02H7/122 ,  H02H7/12 ,  H02M1/32 ,  H03K17/082 ,  H03K17/10 ,  H03K17/12 ,  H02M1/088 ,  H03K17/687

CPC classification number: H02H7/12 ,  H02M1/088 ,  H02M1/32 ,  H02M2001/325 ,  H03K17/0828 ,  H03K17/107 ,  H03K17/127 ,  H03K17/6871

Abstract: A converter valve unit including a plurality of parallel connected controllable semiconducting elements. A free-wheeling diode is connected in anti-parallel with each semiconducting element. A control unit is configured to control each semiconducting element. A current sensor is connected to each of the parallel connected semiconducting elements. The current sensor is configured to sense a current of each semiconducting element by measuring a voltage over the current sensor. A differentiator is configured to compare the currents of the semiconducting elements by comparing the voltages. Upon detecting an unbalance in the currents the differentiator sends a turn-on signal to all control units to control all the semiconducting elements of the valve unit into a conducting stage.

Abstract translation: 一种转换阀单元，包括多个并联的可控半导体元件。 续流二极管与每个半导体元件反并联连接。 控制单元被配置为控制每个半导体元件。 电流传感器连接到每个并联的半导体元件。 电流传感器被配置为通过测量电流传感器上的电压来感测每个半导体元件的电流。 微分器被配置为通过比较电压来比较半导体元件的电流。 在检测到电流不平衡时，微分器向所有控制单元发送接通信号，以将阀单元的所有半导体元件控制为导通级。