Design and Simulation of a New Brushless Doubly-Fed Pulsed Alternator for High-Energy Pulsed Lasers

This paper presents a novel brushless doubly-fed pulsed alternator (BDPA) in the direct-drive power supply system for high-energy pulsed lasers. There are two sets of stator winding which are embedded in the stator slots of BDPA. One is called power winding and another is called control winding. The rotor winding is short circuit. Because there is no brush, compared with the compensated pulsed alternator, BDPA has higher reliability and can run at higher speeds to get higher energy-storing density. Besides, when the system works on the state of continuous multiple pulses, with a decrease of speed, the BDPA can maintain the frequency and voltage of the power winding constant basically. In this paper, the design procedure of BDPA is proposed according to the requirement of the high-energy pulsed lasers. Utilizing the finite-element model of the alternator, we can analyze the electromagnetic properties and calculate inductance parameters of the BDPA to verify the design scheme. Meanwhile, the simulation model of the direct-drive power supply system is established in MATLAB/Simulink to analyze the output performance of the flashlamp load. The simulation results confirmed the feasibility of design scheme of BDPA for the system.