Week-4 Challenge WOT Condition Part-2

EV Live Batch 21.

1 Aim:

What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?

Ans: Here different between mapped model & dynamic model of engine motor & generator , now we have to open 'EV Refence application form the help of matlab windown like below figure:

=> In this model , we can see the FTP75 (2474 Second)

Environment

Longitudinal driver

Controllers

Passenger car

Visualization

Analyze power & energy

=> When we double click Passanger Car then we got Subsystem that is electrical plant below in figure and Mapped model & Dynamic mode of Motors & generators.

=> When we double click in electrical plant then we got this motor subsystem in inside motgenevmapped we can obsver mapped model and dynamic model.

=> Inside the Motor subsystem, both Mapped Model & Dynamic Model are available. we can simulate one model at a perticular time which means that if Mapped Model is activated at that time the Dynamic model will remain deactivate & vice-versa.

(i) Mapped Model:

=> As the inputs are pre-assigned in a llok up table, therefore the outputs can be calculated as per the look-up table information. which means that outputs are stored corresponding to every single inputs.

=> so calculations are very fast.

=> Here input parameters such as:- Brake torque,Fuel flow,Air mass flow etc & outputs are may be exhaust
temperature, efficiency & emmisions.

=> The mapped motor works in torque control mode. This type of motor is used when the user requires a faster simulation and doesn't have the knowledge of motor parameters.

=> The output torque and reference torque is compared and changes are made. Input torque or speed can be specified, electrical losses and maximum motor power and torque can be defined.

(ii) Dynamic Model:

=> When we open the Dynamic model inside the Motor subsyatem, then we can get.

=> It runs by real time simulation where the required input from the drive cycle is taken and for that individiual real time simulation gets performed and summing all the results of the subsystem gives the output for the simulation.

=> Accuracy of Dynamic model is very high as it consists of feedback signals.

=> But these model takes more time to simulate as it simuate the real world conditions.

=> In this type of model, calculations are time consuming.

=> In the dynamic motor a three phase interior permanent magnet synchronous motor (PMSM) is used.

=> The block uses three phase input voltages to regulate the individual phase currents, allowing control of the motor torque or speed. This block is used when the user knows what parameters are to be used in that particular simulation. This motor is more accurate.

How to Change the Model type:

=> Here we change the Mapped Model to Dynamic Model & vice-versa, then we have to open the Motor subsystem which is inside the Electric Plant Subsystem which is inside the Passenger Car
subsystem of the "EvReferenceApplication" simulink model.

=> Here when we double click open motor that is by default we can see then in order to change from mapped model into Dynamic mode, we have to follw the next procedure.

=> Right click on that page then go to Variant, then click on the Label Mode Active Choice then
choose MotGenEvDynamic(MotGenEvDynamic) to select the Model as Dynamic model like below process.

=> Here we see the model change into mapped model to dynamic model like below figure.