一种用于电动汽车充电器的改良型罗氏转换器
安阳学院, 航空工程学院, 河南安阳 455000
| 摘 要： | 随着电动汽车的发展，更高的能量和电池效率成为了电动汽车制造商和消费者的主要关注点。电动车车载充电器的主要部件是DC/DC转换器。在电源开关DC/DC转换器中，因为全桥的相位移位的存在，开关要在零电压或零电流下工作，而这导致了目前的一些问题。如随之而来的变压器两侧的电压变化，这意味着其性能会有一些缺失。现代电动车充电器中通常会使用的功率因素校正转换器，这使得在整个充电过程中实现了高性能和充分性的优势。所以本文设计了一个改良的罗氏转换器，用来实现提高电动车充电的效率。罗氏转换器通常被用作从直流到直流的转换器，在快速变化的线路电压下具有更好的电压调节能力。同时在这项工作中，开发了一个改革后的独立的基于罗氏转换器的电动汽车充电器。为了抑制电压振荡，在高频变压器的初级侧连接了两个装置，即开关和两个削波二极管。罗氏转换器处理非连续导通模式的操作，降低了控制的复杂性，并保持转换器的输出恒定。在反馈系统中，恒定电流和恒定电压模式技术与比例积分控制器结合使用，以提高能力并减少传输泄漏。最后通过应用MATLAB对所提系统的性能进行了评估，得到的结果令人满意。 |
| 关 键 词： | 电动汽车; 充电; 功率因数校正; 不连续传导模式; 高频变压器 |
| DOI： | 10.57237/j.se.2022.01.001 |
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收稿日期: 2022-09-07
接受日期: 2022-09-29
在线出版日期: 2022-11-01
Improved Rogowski Converter for Electric Vehicle Charger
Aviation College, AnYang University, Anyang 455000, China
| Abstract: | With the development of electric vehicles, higher energy and battery efficiency have become the main concerns of electric vehicle manufacturers and consumers. The main component of vehicle charger is DC/DC converter. In the DC/DC converter with power switch, because of the phase shift of the full bridge, the switch has to work at zero voltage or zero current, which leads to some current problems. If the voltage on both sides of the transformer changes, it means that there will be some defects in its performance. The power factor correction converter, which is commonly used in modern electric car charger, has the advantages of high performance and sufficiency in the whole charging process. Therefore, this paper designs an improved Rogowski converter to improve the charging efficiency of electric vehicles. Roche converter is usually used as a converter from DC to DC, which has better voltage regulation ability under rapidly changing line voltage. At the same time, in this work, a reformed independent electric vehicle charger based on Roche converter is developed. In order to suppress voltage oscillation, two devices, namely a switch and two clipping diodes, are connected to the primary side of the high-frequency transformer. Roche converter handles the operation of discontinuous conduction mode, which reduces the complexity of control and keeps the output of converter constant. In the feedback system, constant current and constant voltage mode technology are combined with PI controller to improve the capability and reduce transmission leakage. Finally, the performance of the proposed system is evaluated by MATLAB, and the results are satisfactory. |
| Keywords: | Keywords Electric Vehicle; Charging; Power Factor Correction; Discontinuous Conduction Mode; High Frequency Transformer |
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