In the case of an electric car its power output depends on the size of its motor its volume and the wattage of the incoming current.
Electric vehicle motor power calculation.
V velocity of the car m s.
Ev calculations how to calculate power how to calculate rpm electric vehicle power electric vehicle rpm the given link is for coefficient of drag for di.
T inlb p hp 63025 n 1.
Down the right side of the page you ll find your car s make and model from the drop down box then your electric motor type in the second drop down box your batteries in the next and so forth.
There are several types of batteries chemistry used in hybrid and electric vehicle propulsion systems but we are going to consider only lithium ion cells.
Torque in imperial units can be calculated as.
P engine power w f t total forces acting on the car rolling resistance force gradient resistance force and aerodynamic drag resistance n.
All of the power must come from the batteries and electric motor s.
So its power output is derived from its maximum energy transformation capacity.
Required power from an engine to keep a car at constant speed can be calculated as.
N revolution per minute rpm alternatively.
So the battery s storage capacity and the.
So using the above formulas 144 volt system should be limited to about 700 amps and the 288 volt system to 350 amps.
This calculator provides an estimate of what size electric motor is necessary to propel a vehicle on flat ground or up an incline at a certain speed.
The calculator was designed for dc motor systems so if you re planning an ac conversion it won t be helpful.
Only one problem that much electrical power put into the motor could easily destroy it rather quickly.
An important component that is an integral part of all electric vehicles is the motor.
T inlb torque in lb f.
Speed is the top speed of the calculation.
T ftlb torque lb f ft.
P f t v η 1.
T ftlb p hp 5252 n 1b.
The role of a motor is to create mechanical energy out of another form of energy.
Brushed motor have around 75 80 efficiency and brushless motors have around 85 90 efficiency.
Motor efficiency is the efficiency of the motor.
The common in the field estimate of kw power a 9 motor can handle for short periods is 100 kw.
1 ft lb f 1 356 nm.
Individual battery cells are grouped together into a single mechanical and electrical unit called a battery module the modules are electrically connected to form a battery pack.
The main reason is that li ion batteries have higher.
Motor torque calculations for electric vehicle saurabh chauhan abstract.
It is estimated that 25 of the total cars across the world will run on electricity by 2025.
P hp horsepower delivered by the electric motor hp.
