Abstract
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 has a hex connection and is driven by a 9-switch inverter. In this paper, 12/10 SRMs with hex connection and conventional star connection are designed, and the characteristics and radial force of the stator under pulse drive using a 6-phase inverter are compared. Finally, the difference between the hex connection and star connection is discussed.
