Advanced Closed Loop Control of PMDC Motor Drive using Boost Converter Fed from a Photo Voltaic Panel

The objective of the proposed system is to drive a Maximum Power Point Tracking (MPPT) algorithm based solar powered Permanent Magnet Direct Current (PMDC) motor that utilizes P&O (Perturb and Observe) method. Cost free source which is solar energy is captured and by P&O method of maximum power point tracking, the PMDC motor is able to drive. The output of solar panel is stepped up to desirable level using boost converter. Closed loop controlling of PMDC motor is done by using PI controller. PI controller will impart a constant output to motor. The programming part is done in PIC microcontroller. Simulation is done using MATLAB/Simulink and the PMDC motor characteristics are analyzed and studied. Taking into account the high power bearing capability of PMDC motor, it has got wide scope in agricultural fields. In PMDC, speed and armature current is taken as reference to the PI-controller considering some values of speed as reference. The output signal of the PI-controller is connected to another switch. A diode is connected parallel to the MOSFET to get a constant voltage. With the help of the boost converter it is proved that the boosting of voltage at required level can be done to drive a PMDC Motor such that boost converter forms a good interface between the photo voltaic panel and load. Speed of PMDC motor is controlled by proportional plus integral controller has controlled effectively. The hardware implementation of the proposed system is the future step in the work.