Week-4 Challenge WOT Condition Part-2
Q1.
MAPPED models:
Mapped models are used when the behavior of a particular model is not of our interest and can be modeled with predefined values in the form of lookup tables.
eg: mapped motor:
Implements a mapped motor and drive electronics operating in torque control mode. we have to specify electrical torque range with a torque-speed envelope or maximum motor power and torque. Output torque tracks a torque reference demand and includes a motor and drive response time constant. Also have to Specify electrical losses as a single operating point that estimates loss across the operating range, measured loss, or measured efficiency.
DYNAMIC model:
Dynamic models are used when the internal response to a model with respect to its components is needed.
CHANGING the model type in EV powertrain blocks:
we can use the variant manager in the modeling tab to find the variant systems we have.
right-click on the model you want and use set as Label mode active choice.
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Q2.
Simulink block to calculate miles per gallon.
- vehicle speed data is used to calculate the distance traveled in meters which is then converted to miles
- Battery power data is used to find power used in kWh which is then converted to gasoline-equivalent using US EPA value by dividing with 33.7
- note: As per the US environmental protection agency(EPA) 1 gallon of gasoline is equal to 33.7 kWh
- Dividing distance traveled in miles by the number of gallons, we can get miles per gallon.
- For HEV this gallon(gasoline-equivalent of battery power) is added with gallon used by IC engine then miles per gallon is calculated.
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Q3.
RESULTS:
with the increase in grade and wind velocity,
- peak velocity achieved is reduced as gradient force and aerodynamic force becomes dominant.
- fuel economy is also reduced because the distance traveled is reduced due to external forces.
- deceleration time is reduced so batter recharging capacity is also reduced. *****
Q4