This is part five of an eight-part series of a new Four quadrant dc chopper. The paper
describes the parallel mode of the proposed Four Quadrants DC Chopper (FQDC) for a
series motor. The mode is designed to overcome a disadvantage of dc series motors which
is the speed reduction under load. First, it is studied via simulation using Matlab/Simulink
model. Then the FQDC is experimentally tested on a 0.65 kW series motor in a lab setup.
Finally, a MATLAB/Simulink model is developed to apply the FQDC to a 35kW series motor …

Electric Car (EC) is an alternative solution in reducing the air pollution resulted from burning
of fossil fuel by conventional combustion engine vehicle. However, the EC cost is
unaffordable especially for developing and third world countries. DC drive in EC offers better
price, nevertheless it requires special research attention to improve DC motors and the
converters' performances. The widespread adoption of series DC motors in EC has been
hampered by the failure of the conventional Four Quadrants DC Chopper (FQDC) to provide …