ELECTRICAL

PROJECTS USING MATLAB/SIMULINK

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CONCLUSION:

A three-phase Si/SiC hybrid 5L-ANPC inverter for electric aircraft propulsion drive applications has been presented in this paper. To simultaneously attain higher efficiency and low implementation cost, only the cell 3 of the inverter has been configured with SiC devices, while the rest of the switches are designed with Si IGBTs switching at lower frequencies. Furthermore, to overcome the issue of large commutation loops with the switches in cell 2 and also pursue further loss reduction, synchronous optimal PWM has been applied as a low frequency modulation method. Both thermal and electrical simulation results have been provided to demonstrate the effectiveness of the proposed inverter and the related PWM strategy. Experimental Results have been presented to demonstrate the efficacy of the hybrid “SOP+MPC” modulation method. Test results have verified the performance of the proposed method and the fact that this hybrid inverter topology provides high efficiency and low output harmonic distortions at low cost.

REFERENCES:

[1] X Zhang, C L Bowman, T C O’Connell, et al. Large electric machines for aircraft electric propulsion. IET Electric Power Applications, 2018, 12(6): 767-779.

[2] A Adib, K K Afridi, M Amirabadi, et al. E-mobility: Advancements and challenges. IEEE Access, 2019, 7: 165226-165240.

[3] J He, D Zhang, D Torrey. Recent advances of power electronics applications in more electric aircrafts. AIAA/IEEE Electric Aircraft Technologies Symposium (EATS), July 12-14, 2018, Cincinnati, OH: IEEE 2018: 1-8.

[4] L G Franquelo, J Rodriguez, J I Leon, et al. The age of multilevel converters arrives. IEEE Industrial Electronics Magazine, 2008, 2(2): 28-39.

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