课程文献中心 更多>>

关键词： IGBT   Power module   Power cycling   Three-phase inverters   Microstructural characterization   SEMICONDUCTOR-DEVICES   RELIABILITY   INTERCONNECT  

摘要： A three-phase half-bridge insulated gate bipolar transistor (IGBT) module is designed and prototyped as the assembly of heat sink-substrate-post-chip-substrate-heat sink to realize high power density and good thermal performance for electric and hybrid electric vehicle applications. This paper reports the failure modes different from those fatigue of the chip-near interconnections in the conventional IGBT modules and a method to identify the weak points in two IGBT module samples during power cycling tests with timescale of seconds. Details presented include packaging structure and advantages of the designed IGBT module, conditions of the power cycling tests, thermal performance and power cycling lifetimes of the two module samples, small ranges containing the weak points to be determined with the recorded VCE parameters, the exact weak points, failure modes and mechanisms to be identified with optical microscopy and scanning electronic microscopy observation. The results obtained can be used as feedback to optimize the design and further improve the power cycling reliability of the present double side cooled IGBT module. The principle established through this work can also be applied to optimize the thermo-mechanical design and improve the reliability of other double side cooled power modules.

关键词： Insulated gate biplar transistor (IGBT)   Junction temperature   Estimation   Electric vehicle   MODULES  

摘要： In order to obtain junction temperature of insulated-gate bipolar transistor (IGBT) on electric vehicle, a number of studies have proposed junction temperature (Tj) estimation methods. However, some of these methods require additional circuits which lead to cost increase, some methods simulate the IGBT thermal process with thermal model, which induces a deviation between real functional results and simulation, and the other algorithm based methods may involve upgrading the main control unit (MCU) with increased costs. This paper proposes a method of IGBT Tj estimation with regression analysis. The presented method firstly extracts the most sensitive factors from IGBT power loss model, and then the factors are applied in a data fitting function to characterize Tj. After that, the mentioned fitting function is validated by regression analysis with statistics Anderson - Darling (AD) and P-value. Finally the Tj estimation fitting function is demarcated by the negative thermal coefficient (NTC) measured temperature (TNTC). With the method using TNTC demarcation, the error bandwidth between estimated Tj and measured Tj is 3.4 degrees C in total. Compared with the Tj estimation without TNTC demarcation, the error bandwidth of Tj decreased from 6.9 degrees C to 3.4 degrees C. The Tj estimation method with TNTC demarcation is efficient for an online Tj estimation of IGBT modules without increased costs.

关键词： 变频器   PLC自动控制技术   应用分析  

摘要： PLC自动控制技术是科技发展的产物.传统变频器分析并处理数据的能力普遍较弱,而积极将PLC自动控制技术融入到变频器中可以明显提高该设备的数据分析和处理能力.以下就是本文分析的PLC自动控制技术在变频器中的有效应用.

关键词： 分立器件   商用车辆   Microchip   太阳能逆变器   充电系统   产品组合   电源模块   固态变压器  

摘要： 如今为商用车辆推进系统提供动力的节能充电系统,以及辅助电源系统、太阳能逆变器、固态变压器和其他交通和工业应用都依赖于高压开关电源设备。为了满足这些需求,Microchip Technology近日宣布扩大其碳化硅产品组合,推出一系列高效率、高可靠性的1700V碳化硅MOSFET裸片、分立器件和电源模块。

关键词： 经验小波变换   充电站   主变流器   故障检测  

摘要： 随着电动汽车数量的增加,充电站数量也大量增加.主变流器为充电站的核心部件,其中的绝缘栅双级晶体管(insulated gate bipolar transistor,简称IGBT)易出现故障,该故障会危及电网安全.提出基于经验小波变换(empirical wavelet transform,简称EWT)的充电站主变流器中的IGBT故障检测方法.建立充电站的Simulink模型,对IGBT的故障进行分析.将不同状态下特征分量的小波能量熵进行对比,结果表明该检测方法能对IGBT故障进行准确检测.

关键词： 变频器   ABB ACS880系列   桥式起重机  

摘要： 沸腾焙烧车间锌精矿仓桥式抓斗起重机的变频器(ABB ACS850)故障频繁,严重影响车间正常生产。为了解决变频器各种故障问题,根据起重机的电气原理图,提出在改动最小、成本最节约的原则,将ABB ACS850型号的变频器升级为ABB ACS880变频器,并对升级后变频器各种参数的修改、设置方法及注意事项进行了分析。

关键词： 电力机车   IGBT   应用  

摘要： IGBT作为一种全控型器件,在电力机车牵引系统中应用较为广泛。阐述了IGBT的基本原理和功能,分析了IGBT在电力机车上的几种典型应用。