In this project, the performance of split-phase motor and three-phase induction motor drives for soft starting is evaluated. The pre systematically investigates and compares the characteristics of a variable voltage fed induction motor drive for two different types of soft starters; one based on IGBT and another based on Thyristor. The novelty of the work lies in the development of simple and flexible models for simulation purpose.
This project investigates the influence of the parameters of the machine and of the soft starter on the dynamics of the induction machine start. The situations may reproduce actual situations occurred in practice, for example, the variation of initial voltage Vi, modification of the start time and load value. In this project we have investigated the relation between Total Harmonic Distortion and Power Factor of the IGBT and Thyristor based soft starter. Using an already predefined fire angle characteristic the influence of the initial voltage was also evaluated.
Discussion of these results and conclusions as to the near-optimum types of profiles are delineated based on voltage and current profile fed to induction motor, starting times, and distortion in current with change in firing angle.
Table of Contents
- Chapter 1: INTRODUCTION
- 1.1 Project background
- 1.2 Literature review
- Objectives
- Methodology
- Chapter 2: THEORETICAL BACKGROUND
- 2.1 Induction motor
- 2.1.1 Operating Principle
- 2.2 Starting of Induction motor
- 2.2.1 Direct-on-Line Starter
- 2.2.2 Star Delta Starter
- 2.2.3 Auto Transformer Starting Method
- 2.2.4 Rotor Resistance Starter
- 2.2.5 Solid State starting
- 2.3 Soft starters
- 2.4 Power electronics devices
- 2.4.1 Thyristor
- 2.4.2 Insulated Gate Bipolar Transistor (IGBT)
Objectives and Key Themes
The main objective of this project is to comparatively analyze the performance of thyristor and IGBT-based soft starters for induction motors. The project aims to investigate the influence of various parameters on the motor's starting dynamics and to evaluate the relationship between Total Harmonic Distortion (THD) and Power Factor for both types of soft starters.
- Comparative performance analysis of thyristor and IGBT-based soft starters.
- Influence of soft starter parameters on induction motor starting dynamics.
- Relationship between THD and Power Factor in IGBT and Thyristor-based systems.
- Development of simple and flexible simulation models.
- Evaluation of the impact of initial voltage and firing angle.
Chapter Summaries
Chapter 1: INTRODUCTION: This chapter introduces the project's background, providing context for the comparative analysis of thyristor and IGBT-based soft starters for induction motors. It sets the stage by outlining the project's objectives and methodology, establishing the scope and approach of the research. The literature review, though not detailed here, likely surveys existing work on soft starters and induction motor control, informing the project's design and analysis.
Chapter 2: THEORETICAL BACKGROUND: This chapter lays the groundwork for the experimental and simulation analysis by providing a comprehensive theoretical foundation. It delves into the operating principle of induction motors, detailing their characteristics and starting methods, including direct-on-line, star-delta, auto-transformer, rotor resistance, and solid-state starting techniques. The chapter then explores the concept of soft starters, transitioning to a detailed explanation of power electronic devices, specifically thyristors and IGBTs, their operational principles, and suitability for soft-starting applications. This section is crucial for understanding the core components and underlying technology examined in the project.
Keywords
Induction motor, soft starter, thyristor, IGBT, Total Harmonic Distortion (THD), Power Factor (PF), starting dynamics, simulation, variable voltage fed drive, power electronics.
Frequently Asked Questions: Comprehensive Language Preview of Induction Motor Soft Starters
What is the main objective of this project?
The primary objective is to comparatively analyze the performance of thyristor and IGBT-based soft starters for induction motors. This involves investigating how various parameters affect the motor's starting dynamics and evaluating the relationship between Total Harmonic Distortion (THD) and Power Factor for both types of soft starters.
What are the key themes explored in this project?
The key themes include a comparative performance analysis of thyristor and IGBT-based soft starters, the influence of soft starter parameters on induction motor starting dynamics, the relationship between THD and Power Factor in both systems, the development of simple and flexible simulation models, and the evaluation of the impact of initial voltage and firing angle.
What topics are covered in Chapter 1: INTRODUCTION?
Chapter 1 provides the project background, context for the comparative analysis, outlines the objectives and methodology, and establishes the scope and approach of the research. It also includes a literature review (details not provided in this preview) surveying existing work on soft starters and induction motor control.
What is covered in Chapter 2: THEORETICAL BACKGROUND?
Chapter 2 offers a comprehensive theoretical foundation. It covers the operating principle of induction motors, detailing their characteristics and various starting methods (direct-on-line, star-delta, auto-transformer, rotor resistance, and solid-state). It then explains soft starters and details power electronic devices like thyristors and IGBTs, their operational principles, and suitability for soft-starting applications.
What are the key components and technologies examined in this project?
The core components and technologies are induction motors, soft starters, thyristors, IGBTs, and the analysis of Total Harmonic Distortion (THD) and Power Factor (PF) within the context of motor starting dynamics.
What is the methodology used in this project?
While specifics aren't detailed, the project uses a comparative analysis approach involving both simulation and likely experimental methods to assess the performance of thyristor and IGBT-based soft starters for induction motors. The development of simple and flexible simulation models is also highlighted.
What are the keywords associated with this project?
Keywords include: Induction motor, soft starter, thyristor, IGBT, Total Harmonic Distortion (THD), Power Factor (PF), starting dynamics, simulation, variable voltage fed drive, and power electronics.
What types of starters are compared in this project?
The project compares the performance of thyristor-based and IGBT-based soft starters for induction motors.
What parameters are investigated in this project?
The project investigates the influence of various parameters (not explicitly listed) on the induction motor's starting dynamics. This likely includes parameters related to the soft starters themselves and potentially the motor's characteristics.
What is the significance of Total Harmonic Distortion (THD) and Power Factor (PF) in this project?
The project evaluates the relationship between THD and Power Factor for both IGBT and Thyristor-based soft starter systems, indicating an interest in the efficiency and harmonic content of the power conversion process.
- Quote paper
- Ajay Singh (Author), Anil Kumar Sahani (Author), Mahanji Yadav (Author), 2012, Comparative Performance Analysis of Thyristor and IGBT Based Induction Motor Soft Starters, Munich, GRIN Verlag, https://www.grin.com/document/376772
