Application of Direct Power Control in the Charger for Aircraft Battery

PWM rectifier technology is introduced to the main Power Circuit of the charger for aircraft battery to enhance the charging efficiency of aircraft battery and improve its long term reliability and save its life in this paper. A new strategy of DPC Based on the Space Vector Modulation (SVM) is used in PWM rectifier, Meanwhile, a fuzzy PI controller is designed in DC voltage control loop. The simulation results show that unity power factor is achieved and the proposed method has the advantages of low harmonic distortion of current, excellent dynamic-steady state performances, and particularly the designed fuzzy PI controller can restrain the fluctuation of DC voltage, active power and reactive power effectively when charging startup and charging voltage Changing, and also has excellent robustness.