Study on the Influence of AC Power Supply Frequency on Electric Load

The AC variable frequency power supply system of civil aircraft was briefly described. The influence of AC power supply frequency on electrical load was analyzed, especially the influence of variable frequency AC power supply on three-phase AC fuel pump. Combined with the test results of flight test fuel pump and its power supply frequency, the correctness of the theoretical analysis was verified. The higher the power supply frequency, the greater the outlet pressure when the fuel flow is the same. The design proposal of the fuel pump for the variable frequency power supply system was given. The advantages and disadvantages of each scheme shall be weighed and selected according to the actual working needs of the fuel pump.