The Effect of the Ratio of Remanent Flux Density to Coercivity of Magnet on Spoke-Type Permanent Magnet Synchronous Motor (PMSM) Performance

다국어 초록 (Multilingual Abstract)

Spoke-type PMSMs were designed with commercial permanent magnets and theoretically designed hexaferrite: Nd-Fe-B (NdFe35, G1NH), Alnico (8B, 8H, 9), and La-CoSrM hexaferrite (NMF-15G). It was found that coercivity (Hc) plays a crucial role in determining motor performance. The ANSYS Maxwell software was used to characterize the designed motor performance. Commercial RE-free Alnico 9 holds a 10.5 MGOe of (BH)<SUB>max</SUB>, much higher than a 5.5 MGOe of RE-free Alnico 8B/8H and SrM (SrFe<SUB>12</SUB>O<SUB>19</SUB>) hexaferrite magnets. However, the Alnico 9 motor performance is not better than the other Alnico 8B/8H and hexaferrite motors. The spoke-type PMSM with our theoretically designed SrM hexaferrite simulated motor performance. A motor performs best when the Hc/Br ratio equals one with a high Hc. For instance, the motor torque and peak power increase to 189 Nm and 178 kW, respectively, as the Hc increases to 4.86 kOe from 2.43 kOe. However, the motor performance is not significantly changed with a fixed Hc and various Br. It was found that regardless of (BH)<SUB>max</SUB>, coercivity (Hc) plays a dominant role in motor performance.

목차 (Table of Contents)

• Abstract
• I. INTRODUCTION
• II. DESIGN OF SPOKE-TYPE PMSM
• III. DESIGN OF MAGNETS AND SPECIFICATIONS OF SPOKE-TYPE PMSM
• IV. MOTOR PERFORMANCE SIMULATION
• V. RESULTS AND DISCUSSION
• VI. CONCLUSIONS
• REFERENCES