Rotor Open-Rib Design for Power Density Improvement in Synchronous Reluctance Motor

Abstract

MEPS are an efficiency regulation policy for induction motors, which are being implemented primarily in developed countries. Induction motors are the most commonly used type of motor in industry, owing to their simple structure and pricing advantages. Research on the efficiency improvement of induction motors has become saturated; therefore, studies to replace induction motors with SynRM have been actively conducted. SynRM is an electric motor driven by the inductance difference between the d-axis and the q-axis of the rotor, and has advantages of being composed of only an iron core and having a simple structure. Herein, we analyze the influence of the rotor shape on the inductance change. Further, the design for improving the output was implemented, and the solution to solve the stiffness problem that occurred as a result was studied. Finally, we confirmed the validity of the data through production and experiments.