The potential electrical hazard, the unreal experience, and the time-space inflexibility of the existing practical learning equipment are the barriers to the development of power electronics courses. To address these, this article introduces a mobile semi-physical experiment platform using Pocket Bench.The Pocket Bench is an ultra-compact Hardware-In-the-Loop real-time simulator, which can emulate the power electronic circuit with a 1.25 μs time step, and provide real-time response signals to the physical controller. As the dangerous electrical power flow in the power electronic circuit is emulated in real-time, the electrical hazards are eliminated. In practical learning, the students can implement the semi-physical experiment system quickly by connecting the physical controller to the simulator. With the physical