The transportation system using the Long-stator linear motor propulsion system has the advantage of directly transmitting propulsion force to the vehicle regardless of adhesive friction at high speed, and is used for high speed maglev. However, the initial installation cost is high and as the length of the segmented stator increases, the operating efficiency and power factor are low, resulting in an increase in the capacity of the propulsion inverter and in operating costs. The paper proposes a section switching method using BCT (Bi-directional Controlled Thyristors) in order to minimize the length of the segmented stator. And in order to verify the excellence of section switching method using BCT, a small scale circular test-bed based on a linear motor was manufactured. The experimental result showed that the output current of the inverter fluctuates by motor impedance change when the vehicle moves between stator blocks, and a current ripple occurs due to a position error of the discontinuous position detection signal. In order to solve these problems, a position estimator using full-state observer was presented and the excellence was verified through a test using the test-bed.