Modeling and Analysis of Regenerative Braking of an Induction Motor
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Date
2017-04
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Publisher
AAU
Abstract
Due to the increase in demand of energy, new technologies have evolved to improve energy
efficiency like regenerative braking. In this thesis, the energy storage device, battery, with
converters and IM are used to analyze regenerative braking. Using only battery and IM is easy in
control but adding converters result in a better performance. The analysis is performed using
vector control method and MATLAB SIMULINK as simulation tool. The results show that the
desired energy saving (around 500Watt) can be obtained during regenerative braking. An
experimental analysis using Texas instruments Digital Signal Processor C2000 F28035 was
performed. The torque producing current component, the dc bus voltage and decelerating speed
has been analyzed during regenerative braking mode. From the experiment the torque producing
current component becomes negative when regeneration starts. To analyze the time needed for
the motor to stop two experiments have done. The result demonstrates that the braking time
during regenerative braking is shorter than that of free fall. During regenerative braking the dc
bus voltage was supposed to increase however due to the small inertia of the motor the voltage
increase was not observed. But by adding additional disk to IM, the inertia of the motor was
increased and energy regeneration was observed.
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Keywords
Regenerative braking, Energy regeneration, Vector control, Sensorless