A dual-loop speed control system is an automatic speed regulation device that works through the coordinated operation of an internal current loop and an external speed loop. Its core structure consists of an internal current loop (inner loop) and an external speed loop (outer loop), and it uses a proportional-integral regulator for closed-loop control [1] [7-8]. The system rapidly regulates the armature current through the current loop to limit sudden current changes and protect the equipment; the speed loop is responsible for precisely controlling the motor speed to ensure steady-state accuracy and anti-load disturbance capability [3] [7]. This hierarchical control strategy enables the system to have fast dynamic response and smooth start-stop processes, while effectively suppressing the impact of grid voltage fluctuations.