Advanced angle control mode for new DCM drive system

Aiming at the problems of the circulating current and low torque-speed characteristic of New DCM caused by armature reaction,the structure of electronic commutator,operating principle,conduction logic,armature reaction and the armature circuit of the New DCM with nine commutation units were discussed,while the cause of the circulating current in the commutation unit was analyzed. Then an advanced angle control mode was proposed on the analysis of the armature circuit. Finally an experiment was conducted on the experimental platform of New DCM. The results indicate that the torque-speed characteristic can be improved and the circulating current can be reduced in the new mode. Therefore,the feasibility of the solution is confirmed.