Optimization of gear ratio and power distribution for a multimotor powertrain of an electric vehicle

The architecture and design of the propulsion system of electric vehicles are highly important for the reduction of energy losses. This work presents a powertrain composed of four electric motors in which each motor is connected with a different gear ratio to the differential of the rear axle. A str...

Full description

Saved in:
Bibliographic Details
Published in:Engineering optimization 2018-02, Vol.50 (2), p.293-309
Main Authors: Urbina Coronado, Pedro Daniel, Orta Castañón, Pedro, Ahuett-Garza, Horacio
Format: Article
Language:English
Subjects:
Differential gears
divide-and-conquer
Electric motors
Electric power distribution
electric vehicle
Electric vehicles
Gear ratios
genetic algorithm
Genetic algorithms
multimotor
Powertrain
Product design
Propulsion system design
Reduction
Torque
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The architecture and design of the propulsion system of electric vehicles are highly important for the reduction of energy losses. This work presents a powertrain composed of four electric motors in which each motor is connected with a different gear ratio to the differential of the rear axle. A strategy to reduce energy losses is proposed, in which two phases are applied. Phase 1 uses a divide-and-conquer approach to increase the overall output efficiency by obtaining the optimal torque distribution for the electric motors. Phase 2 applies a genetic algorithm to find the optimal value of the gear ratios, in which each individual of each generation applies Phase 1. The results show an optimized efficiency map for the output torque and speed of the powertrain. The increase in efficiency and the reduction of energy losses are validated by the use of numerical experiments in various driving cycles.
ISSN:0305-215X
1029-0273
DOI:10.1080/0305215X.2017.1302439