Design of bike inverter using adaptive state observer of DC-link

In this paper, the design of the 3 phase inverter using the adaptive control of DC-link Current was carried for electrical bike. The SVPWM-VSI(Space Vector Pulse Width Modulation of Voltage Source Inverter) is analyzed for the induction motor of outer rotor type and a variable DC link current inverter system is applied to improve the performance of torque and speed in the overall operation range of an induction motor drive. This inverter system controls the magnitude of a DC link current actively according to the speed and load conditions of an induction motor, therefore in spite of a low speed range, the width of effective voltage vector in a gate signal is increased and the output voltage error of the inverter is decreased when compared with a fixed DC link current inverter system. The proposed algorithm is verified through experimental results.