North America

Green Room - Session 7

10:30 to 11:30 a.m. Thursday, June 15, 2017

Developing a Temperature Cycling Test for Power Electronics Units Subject to a Very Large Number of Power Cycles in the Field

In the automotive electronics applications it is common to use a field assumption of two cold cycles per day while developing a temperature cycling test for product validation. However with power electronics applications (e.g. hybrid and electric vehicle inverters and converters) the units experience a large number of on/off cycles (up to a million) during their lifetime. Each power cycle is causing brief, but noticeable, temperature rise which affects durability and fatigue life of an electronic unit. Therefore the assumptions and approaches to developing temperature cycling tests for power electronics units should be different from those of "conventional" automotive electronics units, such as radios, gas engine controllers, safety electronics, etc.

Key Words: Power Electronics, Temperature Cycling, Product Validation, Mission Life, Coffin-Manson

Andre Kleyner

Delphi Electronics & Safety

Kokomo, Indiana