50kW磁鐵輔助式磁阻馬達磁石減量設計

Abstract

本論文以磁鐵輔助式磁阻馬達減量作為研究主軸，應用有限元素軟體設計出48槽8極之整數槽分佈繞型式電機，以維持相同的目標規格，包括最大力矩、最大功率、額定點工作效率及力矩密度等性能需求，作為磁石減量的研究限制。探討磁石減量的方法為藉由改變磁鐵輔助式磁阻馬達的磁障形狀及鐵心寬度，增加q軸電感及減少d軸電感，進而提升力矩中的磁阻力矩含量，整體力矩提升至超過力矩設計目標之後，給予降低磁鐵力矩含量的空間，並用來降低磁石的用量，達到磁石減量的效果。 首先，以永磁同步電機作為原型馬達設計，並以此原型馬達的磁石用量做為一個比較基準，之後對磁鐵輔助式磁阻馬達之參數進行探討，並結合最佳化軟體，建立一套優化流程，針對磁障寬度、磁障長度、鐵心寬度、磁鐵大小以及磁障之角度進行最佳化設計，在符合限制條件下，得到最佳的參數匹配，達到磁石減量之目的。

In this paper, the magnet-assisted synchronous reluctance motor magnet reduction is used as the research topics. A finite element software is used to design a 48-slot 8-pole Integral-slot distribution winding motor to maintain the same target specifications, including maximum torque, maximum power, rated point efficiency and torque density, as a research limitation of magnet reduction. The method of reducing magnet is to change the flux barrier shape and core width of the magnet-assisted synchronous reluctance motor, increase the q-axis inductance and reduce the d-axis inductance, thereby increasing the reluctance torque content in the overall torque, and the overall torque is increased to exceed the torque design target. After the target, the space for reducing the magnet torque content is given, and the amount of the magnet is reduced to achieve the effect of magnet reduction. Firstly, the permanent magnet synchronous motor is used as the original motor design, and the magnet amount of the original motor is used as a comparison benchmark. Then the parameters of the magnet-assisted synchronous reluctance motor are discussed, and an optimized software is combined to establish an optimized set. The process is optimized for the width of the flux barrier, the length of the flux barrier, the width of the core, the size of the magnet, and the angle of the flux barrier. Under the constraint conditions, the best parameter matching is obtained, and the purpose of the magnet reduction is achieved.