磁控式高温超导开关特性研究及其在高温超导逆变中的应用

Study on the switching behavior of a magnetically controlled high-temperature superconducting switch and application in superconducting inverters

常规电力电子开关器件在开关导通时仍然有电阻,通过大电流时会产生大量的焦耳热。采用高温超导开关代替常规的电力电子开关器件,可以减少开关导通时焦耳热的产生,从而达到减少能耗、提高效率的目的。实验研究了磁控式高温超导开关的特性,研究了背景磁场方向、背景磁场强度、背景磁场变化速率等因素对磁控式高温超导开关导通和关断情况的影响,为进一步研究高温超导逆变电路奠定了基础。

Joule heat breaks out unavoidably when the current goes through IGBTs and MOSFETs in the on-state. The superconducting tapes used in the HTS（high-temperature superconducting） switch are zero resistance at superconducting state and can deliver large capacity of current without Joule heat. If the HTS switch is popular used in inverters instead of IGBTs and MOSFETs,the Joule heat can be reduced. This paper described the switching behavior,including the turn-on state and the turn-off state,of a magnetically controlled HTS switch.