抄録
This paper proposes a new dynamic mathematical model and new vector simulator for a permanent-magnet synchronous motor with damper winding (DW-PMSM). The rotor of a DW-PMSM has both a permanent magnet similarly to a pure PMSM and a squirrel-cage similarly to an induction motor. Analyzing the behaviors of a DW-PMSM is difficult because of its complex rotor fields. The proposed dynamic mathematical model and vector simulator make it possible to analyze and understand the complicated behavior of a DW-PMSM. The proposed model has the following completeness and generality. 1) It consists of three consistent basic equations for circuit characteristic, torque generation, and energy transmission. 2) It is established in the general reference frame, where the stator and rotor reference frames are included as special cases. The proposed vector simulator is based on the new model, and has the following attractive features. 1) It successfully realizes clear configurations with physically meaningful vector signals, which are helpful for understanding the motor electromagnetic mechanism. 2) Vector signals utilized as transfer signals between blocks are defined in the general reference frame. Consequently, the vector-signal block diagrams in the frame can be directly and easily reduced to ones in a specific frame such as the stator and rotor frames. 3) It is compact. The usefulness of the simulator was verified through reproduction of the complicated behavior of a DW-PMSM.
