パワーモジュール向けAlワイヤ疲労寿命の周波数依存性
キーワード:
Aluminum wire,
Cyclic bending test,
Fatigue life,
Prediction formula,
High temperature,
Power module,
Power cycle test
論文ID: 25-00084
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詳細
論文ID: 25-00084
In order to improve the accuracy of fatigue life predictions for power modules under future operating conditions, fully-reversed cyclic bending test method was developed for aluminum wires with a diameter of 0.4 mm. The tests were conducted at a temperature of 175 degrees with frequencies of f = 10, 4, 1, 0.4 and 0.1 Hz, and the fatigue life increases with increasing f. When f was converted to the operating time of the power module, ton, it was observed that the slope α of ton and fatigue life on a double-logarithmic scale decreases with increasing ton, approaching 0. For power modules operating at 175 degrees, α is a function of ton, and incorporating this relationship enables accurate fatigue life prediction.
