07-03-2011, 10:58 AM
Presented By
ARUNKUMAR N
Design of Hybrid Electric Vehicle.ppt (Size: 721 KB / Downloads: 149)
CONCEPTUAL DESIGN OF HEV AND IMPLEMENTATION OF CONTROLLER
INTRODUCTION
A vehicle that has two or more energy sources and energy converters is called a hybrid vehicle.
A hybrid vehicle with an electrical power train (energy source energy converter) is called an Hybrid Electric Vehicle(HEV).
A hybrid vehicle drive train usually consists of no more than two power trains. More than two power train configuration will complicate the system.
CONCEPTUAL ILLUSTRATION OF A HYBRID ELECTRIC DRIVE TRAIN
Power train (1) is unidirectional and Power train (2) is bidirectional.
ARCHITECTURES OF HYBRID ELECTRIC DRIVE TRAINS
The architecture of a hybrid vehicle is usually defined as the connection between the components of the vehicle traction, and then the energy flow path. The major architectures are:
Series hybrid electric drive trains
Parallel hybrid electric drive trains
Series-parallel electric drive trains
SERIES HYBRID DRIVE TRAIN:
Two power sources feed a single power plant (electric motor) that propels the vehicle.
The traction power is delivered by the electric motor, while the ICE, via a generator, produces electric power to drive the electric motor.
The excess power is then stored in the battery pack.
The ICE is decoupled from the driven wheels and can be operated mostly in the maximum efficiency region.
As the energy from the ICE is converter twice before to drive the wheels, the system is more expensive than the parallel one.
PARALLEL HYBRID DRIVE TRAIN:
In a parallel hybrid drive train, the engine and electric motor can directly supply their torque to the driven wheels through a mechanical coupling.
There is direct mechanical connection between the hybrid power unit and the wheels.
In addition, this layout has an electric traction motor that drives the wheels, and can recuperate a share of the braking energy, in order to charge the batteries (regenerative braking) or help the ICE during the acceleration conditions.
There are several configurations depending on the structure of the mechanical combination between the ICE and the electrical motor.
SERIES-PARALLEL HYBRID DRIVE TRAIN:
The series layout and the parallel layout are merged together in order to have both advantages.
In particular the ICE is able to supply the electrical motor or charge the battery through a generator.
However, it also needs an additional electric machine and a planetary unit, which makes the drive train somewhat complicated.
MODE OF OPERATION:
PROBLEM DEFINITION
Conceptual design of Hybrid Electric Vehicle (HEV) and design of controller for efficient fuel consumption.
OBJECTIVES
To design the series-parallel model of HEV.
Controller design.
Comparison with non-HEV.
FEASIBILITY ANALYSIS
Dymola
Matlab/Simulink(State flow)
PROPOSED METHOD
TIMELINE OF ACTIVITIES
To design HEV using Dymola (end of January).
To design controller in Matlab/simulink (state flow) and to interface HEV model in Dymola with Matlab and to check the functionality of controller (end of February).
To compare the results of non-HEV with HEV and analyze the result (end of March).