High-efficiency modulation strategy design method of the driving motor system under full working conditions for aviation applications

The operating conditions of electric aircraft are complex and changeable. The influence of different switching frequencies and modulation methods on the driving motor system efficiency under different working conditions is still unclear, which leads to the difficulty of modulation strategy design. In view of the above challenges and problems, this paper studies the high-efficiency modulation strategy of the driving motor system under all working conditions. First, based on the double Fourier decomposition method, the harmonic analytical expressions of output voltage and current modulated by SVPWM and DPWM are derived, and the accurate loss model of motor system is established. Second, high-efficiency modulation strategy design method based on the dynamic neighborhood genetic learning particle swarm optimization (DNGL-PSO) algorithm of the driving motor system for aviation under full working conditions is proposed. Third, the effectiveness of the proposed optimal modulation strategy design method is verified by simulation.