Abstract
In this paper, a novel electric vehicle powertrain system is proposed. In the system, a coaxial magnetic gear (CMG), an electromagnetic clutch, a lock, and two electric machines (EMs) are adopted to achieve the power-split by controlling the states of the clutch and the lock, which enables electric vehicles (EVs) to work in four operation modes. The configuration, power flow paths and operation modes are depicted in detail. A dynamic model is established to help determine the parameters and build simulation models. The simple control strategy is adopted to achieve flexible power-splits. How to determine the relevant parameters to meet the drive requirements in the powertrain system is also elaborated. A dynamic simulation using MATLAB/Simulink is performed to take into account the control strategy and New European Drive Cycle. Finally, the simulation results demonstrate, in theory, the rationality of the determined parameters and the feasibility of the operation modes as well as the control strategy.
Highlights
A Novel Electric Vehicle Powertrain SystemSupporting Multi-Path Power Flows: Its Architecture, Parameter Determination and System Simulation
Electric vehicles (EVs) have attracted increasing attention all over the world due to the serious concerns of the energy crisis and air pollution [1,2,3]
For the main drive motor, the required operating speed range becomes much narrower, and this is conducive to motor design; (2) The auxiliary drive motor can work as a flywheel storage device when necessary, which is capable of buffering the energy from regenerative braking, so as to protect the battery; (3) The system integrates a coaxial magnetic gear (CMG) for power-split
Summary
Supporting Multi-Path Power Flows: Its Architecture, Parameter Determination and System Simulation. Shenzhen Key Laboratory of Electric Direct Drive Technology, Shenzhen 518055, China. Received: 10 November 2016; Accepted: 6 February 2017; Published: 13 February 2017
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