Aircraft Starter/Generator System Based on Indirect Matrix Converter

Indirect matrix converter (IMC) is studied for aircraft starter/generator(S/G) application in this paper. Careful consideration of two S/G system structures is presented. In the two structures, S/G is located at the voltage source side and the current source side of IMC respectively. The former is mentioned in existing literature and the latter is proposed by this paper. It is shown that the former has a high chance to suffer an overcurrent problem in starting mode, while the latter is more practical with achievable control strategies and thus is the main topic of this paper. In addition, it is easier to design and damp the LC filter in the latter. Typical starting control strategy and novel voltage boost generating control strategy are presented. The feasibility of the proposed IMC-S/G system and its control strategies are verified by experimental results.