Fuel Cell Battery Powered BLDC Motor
Introduction:
We'll delve into the simulation model we've developed for a fuel cell and battery-powered BLDC (Brushless DC) motor. This model includes a fuel cell connected to a common DC bus through a boost converter, a battery, and a BLDC motor, all working together seamlessly. Let's explore the key components and operational details of this simulation.
Fuel Cell Specifications:
The fuel cell in our model has a nominal operating point of 52 amps and 24.23 volts, with a maximum operating capacity of 100 amps at 20 volts. The nominal power rating stands at 1.26 kilowatts at 24 volts, with a maximum operable power of 2 kilowatts. The boost converter is designed based on these voltage inputs, connecting to the common DC bus operating at 48 volts.
Battery Details:
The battery in our model is linked to the common DC bus, maintaining a voltage level of 48 volts, even though the nominal voltage is 14 volts. The rated capacity is 200 ampere-hours, with an initial state of charge at 50%.
Maximum Power Point Tracking (MPPT):
We've implemented a conventional MPPT strategy for the fuel cell, akin to PV systems. This involves measuring fuel cell voltage and current to determine the optimal operating point for extracting maximum power. The MPPT algorithm adjusts the duty cycle of the boost converter iteratively, considering factors like initial duty cycle, maximum and minimum duty cycles, small changes in duty cycle, power, and voltage.
DC Bus and Voltage Source Inverter:
The common DC bus maintains a voltage of 48 volts, connecting to a voltage source inverter. This inverter interfaces with the BLDC motor, operating in trapezoidal mode. The simulation includes torque adjustments and measurements, capturing the dynamic response of the motor under different loads.
Simulation Results:
The simulation results showcase the transient behavior of the system, with changes in fuel cell power, battery charging, BLDC motor speed, and torque. The MPPT algorithm effectively tracks the maximum power point of the fuel cell, adjusting the boost converter duty cycle accordingly.
Conclusion:
This simulation model demonstrates the integration of fuel cell and battery power for a BLDC motor. The system's adaptability makes it suitable for electric vehicle applications.