Design space methodology and its application in interior permanent magnet motor design

An innovative interpretation of the per-unit IPM machine model named as Design Space is presented in this paper. Based on the proposed Design Space formulation, a compute effective method to predict the IPM machine performance such as current and power factor in full speed range is proposed. A systematic methodology is summarized, which translates the full speed range machine design procedure into the region determination on the so-called Design Space. The effect of dc-link voltage is also analyzed in a similar manner with current and power factor. A series of IPM motors have been designed, and a preferred motor is selected with the help of the proposed Design Space Methodology (DSM), which has the best tradeoff between the nominal voltage and the dropped voltage condition. Experiment results show that, the selected motor satisfy the machine requirements and all the design constrains, such as the current and back-emf limitations.