The Internal Combustion Engine Power Plant and Flywheel Battery were the two primarily compositive units of the Internal Combustion Engine Power Plant --Rotary UPS, among them the Internal Combustion Engine Power Plant ensured the continuous power supply to the load after the breaking of the mains supply, the Flywheel Battery ensured the uninterruptible continuous power supply to the load when mains supply switched to the Internal Combustion Engine Power Plant, so the paper started with the two units, Introduced the control system structure and principle, and focused on discussing the method of achieving the Internal Combustion Engine Power Plant --Rotary UPS telecommunication by Ethernet. The method had been applied in correlative production. The practice showed that it was convenient for usage and high reliability.

The flywheel battery can replace the chemical battery of aircraft energy system completely or partly,and can improve the supply ability,service life and reliability of vehicle energy system.The flywheel battery charging/ discharging control model circuit in the d-and q-axes has been established through the analysis of the permanent magnet synchronous motor and the PWM converter mathematical model and the use of the gyrator principle. And the control strategy of the flywheel battery charging/ discharging magnetic field oriented vector has been studied based on the model.The simulation and experimental results show that the control performance of the flywheel battery using the control strategy is good,and can meet the requirements of the aircraft energy system.