Variable frequency generation system for aircraft

Today a well-known concept of the use of a synchronous generator with permanent magnet excitation in the power generating system with variable frequency is based on the implementation of voltage control due to the high reactance of the generator. However, this approach eliminates the very important features for generating system, in terms of dynamic performance and methods to selectively load emergency shutdown. For reliable triggering the circuit breakers it is required a sufficiently large value of the current about in 2-3 times greater than the nominal value. This paper describes a method of calculating the parameters of the generator in the power supply system with variable frequency which takes into account real parameters of the system required. The analysis of the energy characteristics of the system in a wide speed range of the generator shaft is presented. Some results of the physical experiments are included to confirm the basic principles of operation of such system.