1. (2) Y. Tsuruoka, Y. Toyoda, and Y. Hori: “Basic Study on Traction Control of Electric Vehicle”, Trans. IEE of Japan, Vol. 118-D, No. 1, pp. 44-50 (1998) (in Japanese)
2. (3) H. Sado, S. Sakai, and Y. Hori: “Road Condition Estimation for Traction Control in Electric Vehicle”, In Proc. 1999 IEEE International Symposium on Industrial Electronics, pp. 973-978 (1999)
3. (4) K. Fujii and H. Fujimoto: “Slip Ratio Control Based on Wheel Speed Control without Detection Vehicle Speed for Electric Vehicle”, VT-07-05, pp. 27-32 (2007) (in Japanese)
4. (5) K. Nakamura and H. Fujimoto: “Proposal of Slip Ratio Control for Electric Vehicle with Inverter Control Based on PWM Hold”, IIC-08-146, pp. 75-80 (2008) (in Japanese)