In this paper, the equivalent circuit model of
cycloconverter-fed multiphasespchronous motor system for
taking 12-phase synchronous motor as an example. In this
steady-state and quasi-steady-state analysis is established
equivalent circuit model, the cvcloconverter-fed multiDhae :
syncbronous motor can be seen as two parts. One is an
external impedance consist of winding resistance r and
resistance X” , and the other is an equivalent multiphase
spchonOus motor without damper winding and
Her research mterests are ship electric propulsion and computer control.
winding resistance, which can generate fundamental back
EMF and fundamental currents. Because of the each 3-phase
windings operation reactance, synchronous reactance and
consideration, there are no coupling among the n Y- His research mterests are synchronous motor
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connected 3-phase windings of the equivalent synchronous Power Electrorucs and Electnc Drive.
motor. And their operations are independent of each other.
Thus, some methods and the conclusions of 3-phase
synchronous motor can be applied to the analysis of the
equivalent multiphase synchronous motor.
model for steady-state and quasi-steady-state analysis is
The simdation results show that the equivalent circuit
correct and practical which provides important theoretical
basis and methods for the analysis of the cycloconverter-fed
automation of eIechc power systems.
multiphase synchronous motor system.