Abstract:In view of the low pumping efficiency and high energy consumption of the fuel dispenser, the technology of variable-frequency is introduced into the fuel dispenser system. The mathematical model was established by theoretical analysis according to the structure and principle of fuel dispenser based on variable frequency adjustment. A fuzzy adaptive Proportion Integration Differential (PID) control strategy was adopted in the control system of fuel dispenser in view of the problems of big overshoot, slow dynamic response and low steady-state accuracy. The corresponding mathematical simulation model and pumping system experimental platform were established. Energy consumption test was carried out. Simulation and experimental results show that the control system has fast response speed, small overshoot and good stability by using fuzzy adaptive PID, which has better robustness and rapidity. With the increase of the motor frequency, the pumping efficiency of the fuel dispenser increases first and then decreases, which proves the necessity of introducing frequency conversion technology into the control system. Using the fuzzy adaptive PID control strategy as compared with a common fuel dispenser, the fuel dispenser based on variable frequency adjustment can greatly reduce the energy consumption of the system with the energy saving rate of more than 43% and filling accuracy of less than 0.2%.