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Non-linear time-delay controller for dc/dc power converters in application of electric vehicles

Non-linear time-delay controller for dc/dc power converters in application of electric vehicles

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dc/dc Power converters are increasingly used in vehicular power systems with their control systems re-designed to overcome the challenges associated with the wide voltage and load variations and the non-linear behaviour of constant power loads (CPLs). Within this context, this study investigates the implementation of a non-linear time-delay control (TDC) system in dc/dc power converters. This non-linear controller compares the system response with the response of a reference model, and then generates a control signal which forces the system to follow the reference model. The TDC system is designed to tightly regulate the output voltage of a conventional dc/dc boost converter under input voltage and load variations. Furthermore, the stability of the TD controller following to the CPL variations is studied. To verify the effectiveness of TD controller, its performance is compared with an integral-double-lead controller using MATLAB software.

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