https://github.com/sarwanshah/hu_2020_case_study_on_dc_motor_drives

Explore working of DC Motor Drives with a focus on the analysis of the Power Electronics involved using MATLAB-Simulink.
https://github.com/sarwanshah/hu_2020_case_study_on_dc_motor_drives

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Explore working of DC Motor Drives with a focus on the analysis of the Power Electronics involved using MATLAB-Simulink.

• Host: GitHub
• URL: https://github.com/sarwanshah/hu_2020_case_study_on_dc_motor_drives
• Owner: SarwanShah
• License: mit
• Created: 2025-02-08T21:37:01.000Z (8 months ago)
• Default Branch: main
• Last Pushed: 2025-02-08T21:51:27.000Z (8 months ago)
• Last Synced: 2025-02-08T22:26:39.734Z (8 months ago)
• Size: 0 Bytes
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Power Electronics Application in DC Motor Drives

## Project Overview

This project was developed under the **EE-331 Electrical Machines** course at **Habib University** during Spring 2020. The project explores the application of **Power Electronics** in **DC Motor Drives**. It covers the design, control strategies, and MATLAB-Simulink modeling of motor drive circuits, including **AC to DC rectification** and **quadrant control** for industrial DC motors.

**REPORT: https://github.com/SarwanShah/HU_2020_Case_Study_On_DC_Motor_Drives/blob/main/Power%20Electronics%20Application%20in%20DC%20Motor%20Drives%20-%20Case%20Study%20-%20ss03595%20-%20Sarwan%20Shah.pdf**

**VIDEO PRESENTATION: **



    



## Features  

- **AC to DC Rectification**  

  - Conversion of **3-phase AC** to **DC** using a **6-pulse rectifier**.

  - Improved power delivery with reduced I²R losses and smoothed output through filtering inductors.

  - Control using **thyristor-based gate firing** for dynamic control of power output.

- **Motor Control Strategies**

  - **1-Quadrant Control**: Basic motor speed control using adjustable firing angles.

  - **2-Quadrant Control**: Introduction of **dynamic braking** and **regenerative braking**.

  - **4-Quadrant Control**: Advanced full control over motor speed, torque, and braking, reducing reactive power consumption.

- **MATLAB-Simulink Model**

  - Demonstrates real-time behavior of DC motor drives with adjustable parameters.

  - Supports analysis of voltage, current, and power stress based on varying firing angles.

## Project Implementation  

### ➤ **AC to DC Rectification**  

- Utilizes a **3-phase, 6-pulse rectifier** circuit to ensure higher average DC voltage output.

- Integration of **filtering inductors** to maintain a steady current and reduce losses.

### ➤ **Thyristor Control**  

- **Thyristors** operate based on gate-firing principles to modulate power delivery.

- Gate pulses synchronized with AC phase for continuous conduction over 120°.

### ➤ **Quadrant Control**  

- **1-Quadrant Control**: Allows for acceleration and coasting with limited control over braking.

- **2-Quadrant Control**: Enables fast deceleration and reverse current flow for regenerative braking.

- **4-Quadrant Control**: Employs two converters for comprehensive speed, torque, and direction control.

### ➤ **MATLAB-Simulink Modeling**  

- Simulates real-world behavior of motor drives.

- Visualizes the impact of firing angles on voltage, current, and reactive power.

## Design Challenges  

- High reactive power consumption at greater firing angles.

- Erratic motor behavior at lower speeds due to pulsating currents.

- Complexity and cost of implementing full 4-quadrant control.

3. Adjust firing angles to observe the effects on motor speed, torque, and reactive power.

## References  

- Wildi, T. *Electrical Machines, Drives, and Power Systems*. Pearson New International Edition, 2014.

- Various studies on **thyristor control** and **reactive power** generation.