Abstract: The vibration of a 2-phase BLDC motor is generally due to torque ripple and unbalance. This study examines the torque ripple by FEM simulation and compares it with experiment. To reduce the torque ripple, the switching time of the phase-current is adjusted. Motor parameters such as inductance, back emf are derived from the 2-dimensional finite element analysis on the magnetic field of the 2-phase BLDC motor. And the characteristics of the motor are analyzed by performing circuit simulation. The optimum switching time of the phase-current from the experiment is found and compared with simulation results.