2024 Volume 32 Issue 2 Pages 306-312
Currently, permanent magnet synchronous motors (PMSMs) are commonly used for EV traction motors. However, there are some problems in the cost of permanent magnets, high speed rotation, and the stable supply of rare earth resources. On the other hand, switched reluctance motors (SRMs) have simple, robust and inexpensive structure. However, SRMs have problems such as a large torque ripple, noise and vibration. In addition, SRMs are driven by a 3-phase asymmetric inverter, and the inverter cost is higher than a 3-phase inverter. Therefore, in order to solve these problems, we have proposed a 12/10 SRM that uses a hex connection and is driven by a 9-switch inverter. In this paper, a 12/10 SRM with hex connection is designed, and the characteristic under pulse drive using conventional 6-phase inverter and 9-switch inverter are compared. Finally, the difference between the 6-phase inverter and 9-switch inverter is discussed.
