论文部分内容阅读
快恢复二极管(FRD)工作条件下,结温的实时测量和监控问题始终是个难题。利用脉冲大电流消除结自升温,测量校温曲线,然后基于该校温曲线利用非开关式电学法实现实时测量FRD的瞬态温升。对比了非开关式电学法,红外法以及开关式电学法三种方法测量的瞬态温升曲线。结果表明,在1 W功率下,TO-247-2L封装型的FRD非开关式电学法测量结温的稳态温升为42℃,比开关式电学法及红外法分别高1.2%和2.4%。结果证明,非开关式电学法可以准确地测量器件温升,解决了实时测温的问题,可以避免开关式电学法由于电流切换所造成的结温误差。
Fast recovery diode (FRD) under the conditions of work, real-time measurement of junction temperature and monitoring problems is always a problem. The high temperature pulsed current is used to eliminate the junction self-heating, and the temperature measurement curve is measured. Based on this temperature measurement curve, real-time measurement of the transient temperature rise of the FRD is carried out by using the non-switched electrical method. The transient temperature rise curves measured by the three methods of non-switch electric method, infrared method and switch-on electric method are compared. The results show that the steady-state temperature rise of the TO-247-2L encapsulated FRD non-switch-on electrical method is 42 ℃ at 1 W, which is 1.2% and 2.4% higher than that of the switch-mode electrical method and the infrared method respectively. . The results show that the non-switch-type electrical method can accurately measure the temperature rise of the device and solve the problem of real-time temperature measurement, which can avoid the junction temperature error caused by switching current method due to current switching.