Regenerative electric braking on electric bicycle and storage of energy using ultra capacitor

The most trending invention of this decade is electrical vehicles (EV) which are widely utilized around the world. The driving distance of the vehicle is strictly restricted up to energy storage of inbuilt battery. The important feature of EV is able to recover the energy during braking. The operation of brushless DC motor is to be controlled to generate enough amount of force during braking and this braking energy is being recovered as much as possible and finally, the energy can be stored in ultra-capacitor and then, it is being reused to increase the driving force, driving distance and system efficiency. Researches are being carried out in the field of batteries on the lines of: firstly, development of new energy efficient battery like Li-on and secondly, with the help of energy sources like fuel cell, ultracapacitor and high power batteries, increase the level the energy density in batteries. Each complementary energy sources having its own advantages and drawbacks but among alternatives, ultra capacitor will assist the vehicle battery during peak power demand effectively. To achieve the overall efficiency in regenerative braking system, it needs to make a decision on the power split between the battery and the ultra-capacitor. Therefore, the proposed a strategy will increase the characteristic of EV during regenerative braking and also verified experimentally.