How does dynamic braking work on a locomotive?
Dynamic brakes use the kinetic energy of a train’s turning wheels to create electrical energy, which causes the train to decelerate. Because it consists of electrical energy, dynamic braking can be finely adjusted downward, more so than air brakes.
Which brake system is used in diesel electric traction?
Dynamic braking
Dynamic braking is the use of an electric traction motor as a generator when slowing a vehicle such as an electric or diesel-electric locomotive. It is termed “rheostatic” if the generated electrical power is dissipated as heat in brake grid resistors, and “regenerative” if the power is returned to the supply line.
What is dynamic braking in electric motor?
Dynamic braking is the use of the electric motors as generators when slowing the machine speed. It is termed rheostatic if the generated electrical power is dissipated as heat in brake grid resistors, and regenerative if the power is returned to the supply line.
What is meant by dynamic braking?
Definition of dynamic braking : a system of braking (as in electric trains or machinery) in which the driving motor is converted into a generator and is driven by the kinetic energy of the vehicle thus exerting a retarding force.
What is the difference between dynamic and regenerative braking?
As dynamic braking involves dissipating heat in the resistor, it is used for applications where deceleration speeds vary or energy dissipation is required periodically. Regenerative braking is used in applications where the motor is stopped frequently or the deceleration time is fixed.
Which braking systems on the locomotives is costly?
In case of electric locomotives, additional equipment should be needed for the provision of regenerative braking, it will increase the overall cost of installation. It is costlier compared to other braking systems used in steam and diesel locomotives.
What is difference between plugging and rheostatic braking?
This is similar for both series and shunt wound methods. Plugging gives greater braking torque as compared to rheostatic braking. This method is generally used in controlling elevators, machine tools, printing presses etc.
What happens during the dynamic braking process?
Dynamic braking is another method for braking a motor. It is achieved by reconnecting a running motor to act as a generator immediately after it is turned off, rapidly stopping the motor. The generator action converts the mechanical energy of rotation to electrical energy that can be dissipated as heat in a resistor.
Is regenerative braking AC or DC?
Regenerative braking takes the energy generated by the motor and feeds it back to the AC power source or to a common bus, where it can be used again. Feeding the energy back to a common bus gives an additional benefit in terms of efficiency, because the power is converted from AC to DC only one time.