A Rotating Arc Gap Switch and its Arc Velocity Characteristics
A Rotating Arc Gap Switch and its Arc Velocity Characteristics
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发表时间：
2011
影响因子：
4.7
通讯作者：
Pan Yuan
中科院分区：
文献类型：
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作者：
Pan Yuan
为满足高电压、大电流、电荷转移量大、电极磨损小、寿命长的要求，设计并制造了一种轴向磁场控制的旋转电弧间隙开关。利用ANSYS分析了间隙内的磁场分布。得到了间隙磁通密度与开关几何形状和电弧电流的关系。采用b点探头测量电弧旋转速度。电流为梯形波形，由时序放电电源产生。电流范围为18~72 kA，磁通密度为0.104~0.628 t，通过改变线圈数得到了不同磁通密度下的电弧速度，并与其他旋转电弧间隙开关进行了比较。通过对实验数据的拟合，得到电弧速度与轴向磁场呈指数关系。结果表明，这种开关的电弧速度是由轴向磁场单独决定的。它与其他提供外部磁场的旋转电弧装置有很大的不同。
A rotating arc gap switch controlled by axial magnetic field was designed and built to meet the needs of high voltage,high current,large charge transfers,slight electrode erosion and long lifetime.The magnetic field distribution in the gap was analyzed by ANSYS.The relationship between magnetic flux density in the gap and switch geometry and arc current was obtained.B-dot probes were employed to measure the arc rotating velocity.The current was trapezoid-like waveform and generated by a time-sequence discharge power supply.The current was in the range of 18~72 kA and magnetic flux density was 0.104~0.628 T.The arc velocity in different magnitude of magnetic flux density was obtained by changing the coil number and the results were compared with other rotating arc gap switches.The arc velocity has exponent relation to the axial magnetic field by fitting the experimental data.The results show that the arc velocity in this kind of switch is individually determined by axial magnetic field.It is significant different from other rotating arc devices which provide an external magnetic field.