Commutatorless motor is a complex mechano-elec-tronics device.In order to confirm the structure of main circuit and control circuit and design parameters of components

it is necessary to set up the simulation model approaches of the practical system. Combining power system toolbox and programming function which are provided by Matlab

and us-ing double closed-loop regulator to form the speed adjusting system

and adopting finite state machine method to design control software algorithm

whole process time-domain simulation model of Commutatorless motor is set up. With this model

starting process of the motor

ASD performance of the motor and the parameters of smoothing reactor are analyzed. Waveforms of the simulation and the experiment are analyzed to verify correctness of the simulation model.