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The problem of vibration caused by frequent engine start-stop which improves fuel consumption is serious in hybrid electric vehicle (HEV). In the new HEV power train-electrical variable transmission, which based on dual mechanical port machine (DMPM), this problem is also severe. In this paper, a control method has been proposed to reduce vibration in the process of engine start-stop. This vibration...
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...
There are two types of permanent magnet dual mechanical port electrical machine (DMPM), namely, non-uniform magnetic-field DMPM and uniform magnetic-field DMPM. In this paper, both the equivalent-magnetic-circuit method and FEM are adopted to compare the characteristics of the uniform field DMPM to the non-uniform field DMPM such as electromagnetic coupling etc. The analysis indicates that both outer...
The dual mechanical port (DMP) machine is a new breed machine with two rotors. Because the two rotors can run at different speed, the DMP machine functions as both a pair of motors and an electrical variable transmission system. When it is used in hybrid electric vehicle, it can perform all the functions as Toyota Hybrid System does, but with more compact and integrated structure [1]. In hybrid vehicle...
Dual mechanical port electrical machine (DMPM) is a new breed of energy conversion device and can realize electrical variable transmission in HEV. In this paper, both the equivalent-magnetic-circuit method and FEM are adopted to analyze the electromagnetic coupling of one type permanent magnet DMPM, the uniform field DMPM (UMF-DMPM). The analysis indicates that the electromagnetic coupling between...
The dual mechanical port electric machine (DMPM) is a new breed of electric machines. The two ports can input or output mechanical energy freely, work in motor or generator mode at the same time respectively. But field couplings exist between the inner and outer air-gaps, which affects the performances of the two mechanical ports greatly and brings much trouble in controlling. This paper studies the...
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