期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 35, 期 5, 页码 5221-5237出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2019.2942830
关键词
Current distribution sensing by lock-in thermography; infrared (IR) imaging; insulated gate bipolar transistors (IGBTs); power losses measurement; thermal measurements
资金
- Spanish Ministry of Science, Innovation and Universities under Program HIPERCELLS [RTI2018-098392-B-I00]
- Regional Government of the Generalitat de Catalunya [2017 SGR 1384]
- Agencia Consejo Superior de Investigaciones Cientificas [201850I063, 201950E036]
- Bosch Siemens House Appliances Spain
A test bench is proposed to study, at die-level, the power losses and current distribution in power devices. It is based on an infrared camera and a flexible half-bridge resonant inverter with a tunable resonance frequency fres. With this setup, the die surface temperature is acquired in steady state, while the device is under real operation. The power losses are derived from the temperature mean value averaged, first, over a few switching cycles and, then, across the die surface. By contrast, the current distribution is inferred from the spectral component of the surface thermal map at the switching frequency (fSw). As a proof of concept, two case studies are reported considering 650 & x00A0;V-40 & x00A0;A insulated gate bipolar transistors (IGBTs) soft- and hard-switched within and outside the zero voltage switching condition. First, the power losses are analyzed under switching conditions representative of domestic induction heating applications (fres& x00A0;& x003D;& x00A0;29.6 kHz) at fSw& x00A0;& x003D;& x00A0;40 kHz and fSw& x00A0;& x003D;& x00A0;20 kHz. Second, the power losses and local current distribution are investigated when fres& x00A0;& x003D;& x00A0;9.25 kHz at fSw ranged from 8.91 to 9.51 & x00A0;kHz. Such results are assessed with power losses electrical measurements and simulations, obtaining a satisfactory agreement. Moreover, hot spots are identified as current crowding points at fSw, whose location is fixed by the bonding wires attachment to the die and the device edge termination. As main benefits of this technique, a higher spatial resolution is achieved and problems related with noisy electrical measurements resulting from the insertion of the used probes or transducers, power circuit stray elements, or device packaging parasitics are avoided.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据