Definition Of Regenerative Braking Is Vehicle Retarding Essay

866 Words Dec 11th, 2015 4 Pages
definition of regenerative braking is vehicle retarding effort achieved in a parallel hybrid drive unit when the drive electric motor magnetic field is reversed, both applying retarding torque and generating electricity that can be used to charge the batteries. Regenerative braking is an efficient process at speed by which a vehicle brakes primarily by making the traction motor working in reverse. It takes the kinetic energy from the traction wheels or propeller and converts it into electricity which is then stored for future use. It is widely used in electric and hybrid electric vehicles that already have batteries to store the recaptured energy. In electric and hybrid cars, the regenerative brakes charge the main battery pack, effectively extending the vehicle 's range between charges. Electric trains, which are powered by overhead or trackside power lines, work in a slightly different way. Instead of sending braking energy into batteries, they return it to the powerline. A typical modern electric train can save around 15–20 percent of its energy using regenerative brakes in this way. Some vehicles use banks of supercapacitors for storing energy instead of batteries. How much energy do regenerative brakes save? It depends on the vehicle. Large and heavy vehicles that move quickly (such as electric trains) build up lots of kinetic energy, so they get the best savings. Although they weigh less and go more slowly, delivery trucks that stop and start a lot can also make…

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