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The objective of this paper is to propose a quenching recovery time measurement method for superconducting fault current limiter used in DC circuit. The proposed measurement method includes an experiment circuit, in which there is a L-C discharging current source and a DC circuit breaker. The L-C current source can produce a high DC current which quenches the superconducting coil. Then the DC circuit...
According to the IEC standards, test objects in back-to-back capacitor bank switching tests are subjected to inrush currents of 20 kA peak and 4250 Hz frequency during making operations. For vacuum interrupters (VIs), the contact surfaces may be seriously damaged by the high-energy arc of the inrush current. The field emission current characteristics reflect the surface microscopic conditions after...
There are various kinds of HVDC circuit breakers (CBs) so far, however, their current interrupting capability is limited. Therefore, A DC circuit breaker (DCCB) based on superconducting current-limiting technology and self-excited oscillation technology is proposed to enhance the current interrupting capability. The proposed DCCB has two modules in series, which are superconducting current-limiting...
According to the relevant IEC standards, the back-to-back capacitor banks switching tests need to withstand an inrush current of 20 kA (peak) with 4250 Hz frequency. For vacuum interrupters (VIs), the contact surfaces may be seriously damaged by the high inrush current. The objective of this paper is to investigate how the inrush current influences the field emission current of VIs under power-frequency...
To improve the existing small-size actuator for robotics, a control module in actuator was developed. After the control module was fixed in an actuator, the actuator would be capable of speed control, PVT position control and continuous trajectory tracking. Those functions are not supported by the existing actuators. The paper presents the development of control module in actuator. In the procedure...
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