1. Electric Machines and Drive Research Center, Electric Mobility Research Division, Korea Electrotechnology Research Institute (KERI), Changwon, South Korea
2. Foundation Technology Group, NMC Inc., Busan, South Korea
3. Mechatronics System Research Laboratory, Electrical Engineering Department, Dong-A University, Busan, South Korea
4. KHANSTN Company Ltd., Changwon, South Korea