The higher failure rate of the rectifier unit severely affects the reliability of the more electric aircraft (MEA). In order to provide an insight into the electrical and magneto-thermal behavior in the full-cycle design evaluation, a novel multi-level modeling scheme for the aeronautic asymmetric 18-pulse dynamic phasor (DP)-type phase-shifting auto-transformer (PS-AT) rectifier is proposed in this article. The behavioral level modeling is built up to reveal the electrical characteristics since the ontology parameters are designed for the 18-pulse PS-AT, where the computation non-convergence posed by matrix singularity is alleviated by improving the condition number. Besides, the DP model crossing architecture level and functional level is proposed by transforming the nonlinear electrical variables in the time domain into the frequency domain with time-varying Fourier decomposition and frequency shift. To illustrate the comprehensive electrical and magneto-thermal characteristics of the 18-pulse PS-AT rectifier at the component level, field-circuit coupling, and magneto-thermal coupling with the finite-element method (FEM) are adopted. Furthermore, simulations of the 18-pulse PS-AT rectifier system are also carried out, to validate the simulation accuracy and computation efficiency of the proposed multi-level modeling scheme. An aided design program integrating the multi-level modeling methods is also developed to help designers achieve high-quality products with a short development cycle.

中文翻译：

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全周期设计中航空非对称 18 脉冲相移自耦变压器整流器的多级瞬态建模

整流单元较高的故障率严重影响了多电飞机（MEA）的可靠性。为了深入了解全周期设计评估中的电和磁热行为，一种新颖的航空非对称 18 脉冲动态相量（DP）型相移自耦变压器的多级建模方案（ PS-AT) 整流器在本文中提出。由于本体参数是为18脉冲PS-AT设计的，因此建立了行为级建模以揭示电特性，其中通过改进条件数来缓解矩阵奇异性带来的计算不收敛。除了，通过时变傅里叶分解和频移，将时域中的非线性电气变量转化为频域，提出了跨越架构层次和功能层次的DP模型。为了说明 18 脉冲 PS-AT 整流器在组件级别的综合电气和磁热特性，采用了场电路耦合和有限元法 (FEM) 的磁热耦合。此外，还对 18 脉冲 PS-AT 整流器系统进行了仿真，以验证所提出的多级建模方案的仿真精度和计算效率。还开发了集成多层次建模方法的辅助设计程序，帮助设计人员在较短的开发周期内实现高质量的产品。