A hybrid electric Tricycle (HET) is a type of electric vehicle that uses BLDC motor and a conventional internal combustion engine and manual pedal for physically challenged people. This type of Tricycle is considered to have good performance and fuel economy compared to a conventional method. This paper concentrates on the design and simulation of a hybrid electric Tricycle using a DC-DC power boost converter. Three types of input sources are used: lithium-ion Battery, Two stroke petrol engine and pedal. A DC-DC power boost converter is designed in closed loop speed control of BLDC Motor which arbitrates power to the battery. The main components of the proposed hybrid electric Tricycle (HET) is: battery, two stroke petrol engine, pedal, DC-DC Boot converter, PID controller and BLDC motor. The working model of electric Tricycle is built and the performance of the battery and the power boost converter are analyzed and the results are verified in MATLAB/ simulink