Simulation of an electrical variable transmission based on dual mechanical ports electric machine with clutch

A dual mechanical ports electric machine (DMPM) with clutch is used as an electrical variable transmission (EVT) in hybrid electric vehicle (HEV), as presented in, which can eliminate copper loss and iron loss in the inner motor when clutch is engaged. In this paper, the EVT system simulation model including the models of DMPM, clutch, internal combustion engine (ICE) and controller together, is constructed. The dynamic performance of the system such as the engaging or disengaging process of clutch, the ICEpsilas startup or stop are analyzed under FTP75. Simulation results show that there is an impact torque, which is equal to output torque of ICE, on the outer motor of DMPM at the moment of ICEpsilas startup and the immediate speed increase of ICE in opposite direction due to the sudden decrease of ICEpsilas load when the clutch is disengaging, which should be avoided when the HEV with EVT based on DMPM with clutch is in practical application.