Power loss analysis and measurement of a high efficiency DC-DC converter for EV traction AC drives

Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482) Pub Date : 2000-01-19 DOI:10.1109/ICIT.2000.854179

A. Fratta, P. Guglielmi, G. Pellegrino, F. Villata

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引用次数: 5

Abstract

Previous works have shown the power design effectiveness of novel H-bridge-based DC-DC boost conversion structure, as well as the feasibility of real-time DC-link voltage adaptation to inverter load, in battery-supplied AC motor drives. In this paper a novel test bench has been developed, suitable for power loss measurements in high-efficiency bi-directional DC-DC converters. In order to allow for quasi-direct measurement of the lost power, the concept is to operate the converter by input current having constant module, handling alternating energy flow between two large capacitor banks at given input/output DC voltages. Accordingly, the input current reference is a low frequency (65 Hz) rectangular-wave, whose duty-cycle is regulated by suitable voltage loop due to constant module operation. Except for added large capacitor banks' losses and other secondary effects related to 65 Hz operation, the input DC power supply is shown equivalent to conversion losses at given DC working point. The results point-out the high efficiency of the conversion structure well matched with simple analytical models.

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一种用于电动汽车牵引交流传动的高效DC-DC变换器的功率损耗分析与测量

先前的工作已经证明了基于h桥的新型DC-DC升压转换结构的功率设计有效性，以及在电池供电的交流电机驱动器中实时调整直流链路电压以适应逆变器负载的可行性。本文研制了一种适用于高效双向DC-DC变换器功率损耗测量的新型试验台。为了允许准直接测量损失功率，该概念是通过具有恒定模块的输入电流来操作转换器，在给定的输入/输出直流电压下处理两个大电容器组之间的交流能量流。因此，输入电流基准是一个低频(65hz)矩形波，其占空比由合适的电压环调节，由于恒定的模块操作。除了增加的大电容器组损耗和其他与65hz操作相关的二次效应外，输入直流电源显示为等于给定直流工作点的转换损耗。结果表明，该转换结构与简单的解析模型匹配良好，具有较高的效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of IEEE International Conference on Industrial Technology 2000 (IEEE Cat. No.00TH8482)

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