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PV fed SEPIC converter for BLDC motor based water pump application | PV fed SEPIC Converter

PV fed SEPIC converter for BLDC motor based water pump application | PV fed SEPIC Converter

Introduction:

Hello, viewers! Welcome to another LMS Solution tutorial. In today's session, we delve into the fascinating world of a solar Electric Vehicle (EV) designed for water pumping applications. This simulation model combines a Photovoltaic (PV) panel, a Brushless DC (BLDC) motor, and a DC-DC converter, all orchestrated to maximize power efficiency using the Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) algorithm.


System Components:

Photovoltaic Panel:

  • Total Rating: 3100 Watts

  • Panel Rating: 250 Watts

  • Configuration: Three parallel strings, each with four series-connected panels.

DC-DC Converter:

  • Function: Utilizes MPPT algorithm to extract maximum power from the PV panel.

  • Control Logic: Adjusts the duty cycle based on changes in power and voltage.

Brushless DC (BLDC) Motor:

  • Role: Drives the water pump for the intended application.

  • Feedback Loop: Incorporates speed feedback for effective control.

MPPT Algorithm:

P&O MPPT:

  • Parameters Monitored: PV current and voltage.

  • Algorithm: Dynamically adjusts the duty cycle based on changes in power and voltage.

  • Constraints: Ensures the duty cycle stays within specified limits for optimal performance.

Water Pumping Application:

BLDC Motor Control:

  • Control Logic: Switches voltage source inverter based on back EMF conditions.

  • Torque Control: Back EMF conditions dictate the torque applied to the motor, simulating water pumping.

Simulation Results:

Initial Conditions:

  • Irradiation: 1000 Watts per square meter

  • PV Voltage: 125 Volts

  • PV Power: 3000 Watts

  • Converter Power: ~2995 Watts

Changing Irradiation:

  • After 2 seconds, irradiation drops to 500 Watts per square meter.

  • PV Power decreases to ~1500 Watts.

  • Converter Power adjusts accordingly.

  • Speed, current, and other motor parameters show dynamic changes.

Conclusion:

This simulation demonstrates the adaptive behavior of the Solar EV for water pumping under varying irradiation conditions. The MPPT algorithm efficiently adjusts the duty cycle to optimize power extraction, ensuring the system's stability and responsiveness. The BLDC motor, in turn, effectively translates the controlled power into water pumping action.

Future Considerations:

Exploring this simulation further and tweaking parameters can provide insights into system behavior under different scenarios. For a practical implementation, the MATLAB code and detailed simulation steps are recommended.

Thank you for joining us in exploring the Solar EV for Water Pumping simulation. Subscribe to our channel and hit the bell icon for more exciting tutorials. Until next time, goodbye!


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