A Study on Re-adhesion Control of Urban Railway Vehicle

In order to control the maximum tractive effort, adhesion coefficients were estimated by velocity sensorless vector control and load torque disturbance observers. The anti-slip algorithm controls motor torque to have the estimated adhesive effort which remain steady at the maximum adhesive effort by PI torque controlling the differentiated values of estimated adhesion coefficients. To realize this control algorithm, 1C1M(1-Controller 1-Motor) railway simulator which allows easy load distribution and slip control was used to simulate the proposed algorithm. And the algorithm was proven by tests.