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High frequency transformer in electric traction with bidirectional DC-DC converter using customized embedded system
Microprocessors and Microsystems ( IF 2.6 ) Pub Date : 2020-06-03 , DOI: 10.1016/j.micpro.2020.103162
Sachin Gee Paul , C.S. Ravichandran

In Today's scenario of Public Transportation, Railway is substantially famous and commonly adopted technology for comfortable conveyance. One of the significant concern in traditional network is exploitation of line frequency transformer as these are too bulky owing to the nature of low operating frequency. Searching for the solution, the researchers have found that the high frequency Transformer (HFT) is an apt solution for this and suitable for high power applications especially for electric traction. The line frequency is transformed into medium frequency via this HFT. The medium frequency transformer offers to two distinct roles: It provides galvanic isolation in between AC grid high-voltage and low-voltage associated to the load. The second role is it assists the IGBT switches in LCC resonant circuit to function in soft switching. In general, there are three conversion strategy followed in the HFT. In addition, a separate control strategy is applied for Rectification mode, isolation stage and inverter mode. In the traction inverter side, hybrid braking mechanism is followed to control the speed and torque of the asynchronous motor. MATLAB/SIMULINK is chosen as the software platform to substantiate the results of the recommended power electronics transformer topology. The proposed system is also evaluated through hardware on a laboratory scale prototype.



中文翻译:

带有定制嵌入式系统的双向牵引式DC-DC转换器的电力牵引高频变压器

在当今的公共交通场景中,铁路是享誉盛名且普遍采用的舒适运输技术。传统网络中最重要的问题之一是开发了线频变压器,因为由于工作频率低,它们体积太大。在寻找解决方案时,研究人员发现高频变压器(HFT)是对此的合适解决方案,并且适用于大功率应用,尤其是电力牵引。通过此HFT,线路频率转换为中频。中频变压器具有两个不同的作用:在交流电网的高压和与负载相关的低压之间提供电流隔离。第二个作用是协助LCC谐振电路中的IGBT开关在软开关中起作用。通常,HFT中遵循三种转换策略。此外,针对整流模式,隔离级和逆变器模式采用了单独的控制策略。在牵引逆变器侧,采用混合制动机制来控制异步电动机的速度和转矩。选择MATLAB / SIMULINK作为软件平台,以证实推荐的电力电子变压器拓扑结构的结果。拟议的系统还可以通过硬件在实验室规模的原型上进行评估。选择MATLAB / SIMULINK作为软件平台,以证实推荐的电力电子变压器拓扑结构的结果。拟议的系统还可以通过硬件在实验室规模的原型上进行评估。选择MATLAB / SIMULINK作为软件平台,以证实推荐的电力电子变压器拓扑结构的结果。拟议的系统还可以通过硬件在实验室规模的原型上进行评估。

更新日期:2020-06-03
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