Influences on pulsed-current transporting properties of semiconductor switch by its consumed energy and thermal characters

The pulsed power supply provides single or repeated frequency pulse energy for the load and needs the high-power switches to realize the control function. For the advantages of high reliability and small resistance, the semiconductor switch has been widely used in the pulsed power systems. The through-flow capability is an important technical parameter of the semiconductor switch, and is also the basic parameter on designing the pulse power systems. Through theoretical analysis a fast algorithm for estimating the semiconductor switch through-flow capability was deduced by applying the 10ms surge index of the device in this paper. To prove the feasibility of the method, a thyristor in an electromagnetism launching system was tested with this algorithm, and its flow-through capacity is compared with the results from forester´s model. Results show that this method provided a fast and concise model.