Study On Starting Operation Of Doubly Salient Brushless DC Starter/Generator System

Aeronautics Starter/Generator System is a part of the aircraft power system. Its main function is to start the aircraft engine and generate electric power after the engine is started. It has become an important facet of the development of the modern aircraft electrical equipments. Doubly salient motor is a new kind of motor. More and more attention and research efforts are given to this new motor recently because of its particular structure and high electrical performance. This paper is devoted to a novel brushless DC starter/generator system, which use doubly salient motor as its starter/generator. The basic structure and operation principle of this doubly salient brushless DC starter/generator is introduced. The statistic characteristics and Mathematics model of the motor is analyzed. The steady performances of two kinds of power converter topologies (Fullbridge converter and halfbridge converter) are studied and compared from the angle of theoretical study and digital simulation. The last part of this paper describes the hardware and the software design of the system. The test waveforms are shown and demonstrate the correctness of the theoretical study and digital simulation.