9Schiferl R F, Ong C M. Six phase synchronous machine with AC and DC stator connections, Part I and Part II [J]. IEEE Transactions on Power Apparatus and Systems, 1983, 102(8): 2685-2701.
10Franklin P W. A theoretical study of the three phase salient pole type generator with simultaneous AC and bridge rectified DC output-part I and part II [J]. IEEE Transactions on Power Apparatus and Systems, 1973, 92(2): 543-557.