Is tractive effort the same as torque?
Is tractive effort the same as torque?
Total Tractive Effort is the net horizontal force applied by the drive wheels to the ground. The Wheel Torque calculated in Step Five is the total wheel torque. This quantity does not change with the number of drive wheels.
How is tractive torque calculated?
The required tractive torque of the motor shall be equal to the tractive torque at wheel, Tw = Ft. rw , (i.e. Tractive Torque = Tractive Force x mean wheel radius). So you must determine the acceleration required to reach you designed speed.
How do you calculate tractive effort?
For an electric locomotive or a diesel-electric locomotive, starting tractive effort can be calculated from the amount of weight on the driving wheels (which may be less than the total locomotive weight in some cases), combined stall torque of the traction motors, the gear ratio between the traction motors and axles.
What is tractive effort defined as?
Definition of tractive effort : the force in pounds exerted by powered equipment (as a locomotive) as measured for statistical purposes at the rim of the driving wheels.
What is tractive effort and tractive resistance?
When tractive effort TE is equal to the tractive resistance TR a vehicle would be either stationary or moving at a uniform velocity. It the tractive effort exceeds the resistance the vehicle will accelerate until the tractive effort once again equals the tractive resistance.
What is the tractive effort explain tractive effort for propulsion of train?
The force which a locomotive can exert when pulling a train is called its tractive effort, and depends on various factors. speed up to a certain speed, the tractive effort is almost constant. As speed increases further, the current in the traction motor falls, and hence so does the tractive effort.
What is tractive effort & What are the forces that resist?
The tractive effort required to overcome train resistance: The resistance of the train is mainly due to various kinds of friction. The three basic types of friction responsible for the train resistances are Coulomb friction, viscous friction and air friction.
What is tractive effort in electric vehicle?
Tractive efforts is defined as the tractive force of a vehicle exerts on a surface or the amount of tractive force is parallel to the direction of motor. 2.4 Traction or Tractive Force. Tractive force is the force used for generate the variation between tangential surface and body.
What are the types of tractive effort?
Where is tractive effort generated in EV?
Traction Coefficients for normal Car Tires
| Surface | Traction Coefficient – μt – |
|---|---|
| Wet Asphalt | 0.6 |
| Wet Concrete | 0.6 |
| Dry Asphalt | 0.9 |
| Dry Concrete | 0.9 |
What is tractive effort explain the components of tractive effort?
Tractive effort is the force required to haul a load. Tractive effort, when multiplied with speed at which the train is required to run, gives the HorsePower.
What is tractive effort in automobile?
The force available at the contact between the drive wheel tyres and road is known as ‘tractive effort’. The ability of the drive wheels to transmit this effort without slipping is known as ‘traction’. Hence usable tractive effort never exceeds traction. The tractive effort relate to engine power as follows.
How do you convert tractive effort to nm?
I have just had a power run done on my R32 GTR and have a reading for tractive effort, and I want to convert that to an approximate torque figure (Nm) we see that the tractive effort is obtained by multiplying the torque by the total ratio of power the train and dividing this sum by the rolling radius of the driving tyres. (easy)
How do you calculate the tractive effort of a train?
we see that the tractive effort is obtained by multiplying the torque by the total ratio of power the train and dividing this sum by the rolling radius of the driving tyres. (easy) TE = (T * R * 1000) / r
How do you calculate tractive force from engine torque?
Tractive Force Calculation for a Vehicle : Applied tractive force based on engine torque can be calculated as TE = (Et x η x Ng x Na ) / R…………………………eq.1 Where, TE – tractive force in N Et – Engine torque in Nm η – Overall efficiency of power train Ng – Transmission ratio
What is total tractive effort (TTE)?
Total Tractive Effort is the net horizontal force applied by the drive wheels to the ground. If the design has two drive wheels, the force applied per drive wheel (for straight travel) is half of the calculated TTE.
