This article presents a sensorless control system of permanent magnet synchronous motor (PMSM) for solar electric tuktuk (E-tuktuk) application. This study purposes a new method of control algorithm of PMSM for E-tuktuk with low-cost by using the sensorless strategy. The sensorless strategy covers the estimated rotor speed and position of PMSM, and a sliding mode observer (SMO) is proposed in this study. The SMO is the most popular method of sensorless control because of its nonlinear control structure, deterministic nature, robustness, and high performance. The sigmoid function is used to reduce the chattering in the observer system. The Field Oriented Control (FOC) is a popular control algorithm because it is based on two fundamental ideas; flux and produced torque that can be controlled separately. The FOC was originally developed for medium-high performance motor applications that were required to operate smoothly over the full speed range and had an excellent dynamic performance. The proposed control algorithm is simulated by using MATLAB/Simulink, and the performance of the system is analyzed and developed. The simulation results indicate that the proposed method in this case study is capable of tracking the actual values of rotor speed and position of PMSM with small deviations, robustness, high dynamic performance, and sufficient for precise control. Lastly, this study is considered the first stepping stone toward real experiments with real parameters to confirm the performance in future work.