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Gradationally Controlled Voltage Inverter for More Electric Aircrafts

机译：用于更多电气飞机的逐方控制电压逆变器

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The more electric aircraft (MEA) concept has been attracting attention over recent decades to reduce emissions and fuel consumption. In MEAs, many subsystems that previously used hydraulic or pneumatic power have been replaced by electrical systems, and hence the weight of inverters has significant importance. The weight of inverters is largely attributed to passive filters that reduce the derivative of output voltages dv/dt and electromagnetic interference noises caused by common-mode voltages. To reduce the size of passive filters, multilevel inverters with 5 or more voltage steps are preferred. However, classic multilevel inverters have some challenges to achieve these step numbers without using plural dc power supplies that require massive transformers. In this work, a gradationally controlled voltage (GCV) inverter is proposed for MEAs. The GCV inverter can supply gradational quasi-sinusoidal voltages with 7 voltage steps, combining two different voltages from a three-level (main) inverter and H-bridge (sub) inverters. In addition, only one dc power supply is required for the main inverter. Furthermore, when sub inverters have faults, the GCV inverter can continue operation using the main inverter. Simulation results confirm that the GCV inverter suppresses common-mode voltages and dv/dt as low levels as the classic multilevel inverter and continues operation during a fault.
机译：近几十年来减少排放量和燃料消耗越多的电气飞机（MEA）概念一直在吸引注意力。在MEAS中，使用先前使用的液压或气动功率的许多子系统已被电气系统取代，因此逆变器的重量具有重要意义。逆变器的重量很大程度上归因于被动滤波器，其减少由共模电压引起的输出电压DV / DT和电磁干扰噪声的导数。为了减小无源滤波器的尺寸，优选具有5个或更多个电压步骤的多级逆变器。然而，经典的多级逆变器具有一些挑战，可以在不使用需要大量变压器的多个DC电源的情况下实现这些步骤编号。在这项工作中，提出了一种测量的测量电压（GCV）逆变器。 GCV逆变器可以提供具有7个电压步骤的渐变准正弦电压，将来自三级（主）逆变器和H桥（子）逆变器的两个不同电压组合。此外，主逆变器只需要一个直流电源。此外，当子逆变器具有故障时，GCV逆变器可以使用主逆变器继续操作。仿真结果证实，GCV逆变器抑制了作为经典多级逆变器的共模电压和DV / DT，并在故障期间继续操作。

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