Design of a highly reliable three-phase four-leg inversion power supply for more electric aircraft
Design of a highly reliable three-phase four-leg inversion power supply for more electric aircraft
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DOI：
10.1109/iciea.2015.7334138
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
Chen Jiawei;Wen Changyun;Lee Meng Yeong;C. Gajanayake;A. Gupta
中科院分区：
文献类型：
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作者：
Chen Jiawei;Wen Changyun;Lee Meng Yeong;C. Gajanayake;A. Gupta
在电动飞机 (MEA) 中，始终需要逆变电源来为一堆需要 115VAC/400Hz 电力的传统负载供电。目前逆变电源通常采用空间矢量脉宽调制（SVPWM）控制的三相三桥臂逆变器。这种逆变器的缺点是不具备在不平衡负载条件下工作的能力，特别是在短路条件下，这使得其难以在未来的商业尤其是军用MEA中实施。正弦脉宽调制（SPWM）控制的三相四桥臂逆变器可能是解决这一问题的方法，但是，与SVPWM控制的逆变器相比，其直流电压效用较低。因此，需要更高的输入直流电压，这不仅增加了功率开关的电压应力，而且降低了系统效率。因此，本文提出了一种新的鞍形脉宽调制（SAPWM）方法，并将其应用于三相四桥臂逆变器，形成高度可靠的逆变电源，非常适合未来的MEA。详细阐述了利用模拟电路产生马鞍形脉宽调制波形的方法、系统控制方法以及逆变电源的工作原理。在Sabre中设计了6kVA仿真平台。仿真结果验证了所提出逆变电源的有效性。
In a more electric aircraft (MEA), there are always needs of inversion power supplies to power a bunch of legacy loads that need 115VAC/400Hz electric power. Space vector pulse width modulation (SVPWM) controlled three-phase three-leg inverter is usually adopted as the inversion power supply at present. The drawback of such inverter is that it does not have the ability to operate under unbalanced load conditions, especially under short-circuit condition, which makes it hard to be implemented in future commercial and especially military MEAs. Sinusoidal pulse width modulation (SPWM) controlled three-phase four-leg inverter may be a solution to such a problem, however, its DC voltage utility is low compared to the SVPWM controlled inverters. As a result, higher input DC voltage is required, which not only increases the voltage stresses of power switches but also deteriorates the system efficiency. Therefore, in this paper, a new saddle pulse width modulation (SAPWM) method is proposed and applied to a three-phase four-leg inverter to form a highly reliable inversion power supply which is very suitable for future MEAs. The way to generate the saddle pulse width modulation waveform using analog circuits, the system control method and the operational principle of the inversion power supply are elaborated. A 6kVA simulation platform is designed in Saber. The validity of the proposed inversion power supply is verified by simulation results.