🔋 Simulation and Efficiency Analysis of EV Powertrain

A comprehensive simulation of Electric Vehicle (EV) energy dynamics, focusing on grid-to-battery charging and regenerative braking efficiency.

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📌 Project Overview

This project presents a comprehensive simulation and efficiency analysis of an Electric Vehicle (EV) powertrain using MATLAB/Simulink. The study focuses on two critical energy processes:

1. Grid-to-Battery Charging: Converting 230 Vrms grid power to a DC level for a 50Ah Lithium-Ion battery.
2. Regenerative Braking: Quantifying energy recovered during vehicle deceleration.

The analysis demonstrated an overall system efficiency of approximately 67%, highlighting the impact of energy recovery systems on extending EV range.

📂 Key Features

• AC-to-DC Charging Simulation: * Models a full-wave bridge rectifier with current limiting.
  • Achieved a charging efficiency of 93.7%.
• Regenerative Braking Model: * Simulates a vehicle decelerating from 70 km/h.
  • Calculates back-EMF power generation based on Newton’s Second Law ($F=ma$).
  • Recovered approx. 65% of kinetic energy.
• Efficiency Analysis: * Automated calculation script (Part3Calculations.m) to compute total input vs. gained energy.

⚙️ Usage

1. Prerequisites: MATLAB & Simulink.
2. Running the Simulations:
   • Open src/BatteryCharging.slx to view the charging circuit.
   • Open src/RegenerativeBraking.slx to view the dynamic braking model.
   • Run src/Part3Calculations.m to generate the efficiency report in the Command Window.

📊 Results

The project successfully validated the dual-functionality of the EV powertrain:

• Charging: Stable voltage/current delivery overcoming internal battery resistance.
• Braking: Smooth deceleration logic effectively mimicking physical inertia.

The project calculated efficiencies by integrating power over time ($E = \int P \cdot dt$) for both scenarios.

Metric	Value	Description
Charging Efficiency	93.7%	High efficiency achieved via rectifier circuit.
Recovered Energy	184.3 kJ	65% of initial kinetic energy recovered.
Overall Efficiency	67.07%	Combined system efficiency (Charging + Braking).

Note: Detailed calculations and plots can be generated using the Part3Calculations.m script.

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👥 Authors

• Albert Saman
• Hussam Dawood

Project submitted for the Instruments and Measurements course at Princess Sumaya University for Technology (PSUT).