Bidirectional Buck-Boost Converter-Fed DC Drive

This paper implements the regenerative braking concept with a bidirectional DC-DC converter-fed DC motor to charge the ultracapacitor and also to reduce power consumption. This paper uses the ultracapacitor power source for fast current changes and while battery responds for slow current changes which in turn increases the lifetime of the battery. Energy developed at the time of braking is not useless; it is reutilized to store the energy in the ultracapacitor. An experimental prototype is developed. The advantage is that state of charge (SOC) of the battery and ultracapacitor voltage and current and voltage are within the limits.