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    • 7. 发明申请
    • POWER MODULE AND METHOD FOR DETECTING INSULATION DEGRADATION THEREOF
    • 用于检测其绝缘降解的功率模块和方法
    • US20120039045A1
    • 2012-02-16
    • US13265446
    • 2010-04-01
    • Xiaohong YinTakashi NishimuraKei YamamotoKazuhiro TadaTatsuya OkudaTakeshi Oi
    • Xiaohong YinTakashi NishimuraKei YamamotoKazuhiro TadaTatsuya OkudaTakeshi Oi
    • H05K7/20
    • G01R31/129H01L25/072H01L2224/48091H01L2224/48137H01L2224/48247H01L2924/01004H01L2924/01077H01L2924/01087H01L2924/181H01L2924/00014H01L2924/00012
    • A method and device for detecting insulation degradation of a power module, which detects, in advance, degradation of an insulating sheet based on a current change immediately before breakdown of an insulation characteristic from a current value of a current flowing through the insulating sheet, thereby detecting a failure of a power module caused by the degradation of insulation. The device includes: a current detector sampling and detecting a current value of a current flowing through an insulating sheet of the power module at a predetermined time interval; a calculator determining, based on the current value, a state in which the insulation characteristic of the insulating sheet is so degraded that the breakdown is imminent, and outputting a degradation determination result of YES when it is determined that the insulating sheet is in the state immediately before the breakdown; a current storage storing a current value i(n−1) at a previous sampling time point; and an alarm generating an alarm in response to the degradation determination result of YES. The calculator outputs the degradation determination result of YES when a present current value in exceeds ten times the previous current value i(n−1).
    • 一种用于检测功率模块的绝缘劣化的方法和装置,其预先根据绝缘特性从流过绝缘片的电流的当前值立即根据电流变化检测绝缘片,从而 检测由绝缘劣化引起的电源模块的故障。 该装置包括:电流检测器,以预定的时间间隔对流过功率模块的绝缘片的电流的电流值进行采样和检测; 基于当前值,计算器确定绝缘片的绝缘特性劣化的状态,使得击穿即将发生,并且当确定绝缘片处于该状态时,输出劣化判定结果为“是” 紧急故障前; 存储在先前采样时间点的当前值i(n-1)的当前存储器; 以及响应于劣化判定结果为“是”而产生警报的报警。 当当前值超过前一个当前值i(n-1)的十倍时,计算器输出劣化判定结果为“是”。