Parameter Matching and Performance Simulation for a Distributed Power Extended-Range Electric Vehicle

Abstract

In order to solve the problem of low power-mass-ratio and high curb-weight in existing extended-range electric vehicle, this paper proposed a distributed power design, and calculated the powertrain parameters of this design, which was based on a commercially available extended-range electric vehicle. Through parameter calculation and simulation, this design was proved to significantly lower the curb weight and manufacturing cost of an extended range electric vehicle, and improve the efficiency of regenerative braking at the same time, finally lead to longer mileage.

Powertrain structure analysis of extended range electric vehicles

“…Control strategy is the focus of the development of extended range electric vehicles, and the coordination of power drive system components affects the fuel efficiency of the entire vehicle. The vehicle control strategy is divided into the following four parts [6].…”

“…The disadvantage is that it is impossible to feedback on the situation of each component, the energy transfer chain is long, the efficiency loss is large, and the energy efficiency of the whole vehicle is low. But the constant power strategy is the simplest and most effective strategy to design and is the basis for the design of other advanced strategies [6].…”

“…It has the ability to dynamically detect power changes and real-time feedback. Its disadvantage is that the overall thermal efficiency is poor, which cannot reflect the advantages of extended range electric vehicles [6].…”

“…𝑃𝑁 𝑚𝑎𝑥 (6) Where, λ is the motor overload coefficient, generally taking the value of 2~3. Peak torque 𝑇 𝑚𝑎𝑥 rated torque 𝑇 𝑁 According to torque -power relationship 𝑃 = 𝑇⋅𝑛 0 9550 (7) By substituting the peak power and rated power of the drive motor into the above equation, the maximum torque and rated torque of the drive motor are obtained.…”

Development and Test Application of an Auxiliary Power-Integrated System

“…An APU control method based on linear variable parameters and robust controllers is proposed in [24], which realizes the stable control of APU output voltage and is composed of a diesel engine and three-phase uncontrolled rectifier, effectively restraining the load mutation to the engine speed and the influence of current generation. A distributed power design was proposed, and the powertrain parameters of this design were calculated in [25,26]. Most methods concentrate on energy management strategy optimization and improvement for APU fuel economy [27].…”