Table of Contents
Chapter 1: Introduction
1.1 General Description of the Problem1.2 Purpose of the Project
1.3 Scope of the Project
1.4 Organization of the Thesis
Chapter 2: Comprehensive Review
2.1 Background: Industry and the Induction Motor2.1.1 The Principles of Power Transfer in an Induction Motors
2.1.2 Efficiency and Losses in Induction Machines
2.1.3 Stray Load Losses
2.1.4 Introduction to Inter-bar Currents
2.2 Determination of Stray Load Losses
2.2.1 Theoretical Review
2.2.2 Discussion
2.3 Inter-bar Currents as a Stray Load Loss
2.3.1 Definition of Inter-bar Currents
2.3.2 Causes and Effects of Inter-bar Currents
2.3.3 Parameters Affecting Inter-bar Currents
2.3.4 Theoretical Review: Methods of Calculating Inter-bar Currents
Chapter 3: Motivation for Study
3.1 Temperature Tests3.1.1 Inter-bar Currents as a Function of Temperature
3.1.2 Inter-bar Current Heat Distribution
3.2 Direct Measurement Tests
3.2.1 Frequency Components of Inter-bar Currents
3.2.2 Inter-bar Current Distribution
Chapter 4: Experimental Setup and Procedure
4.1 Rotating Stator Induction Motor Specifications4.2 Physical Setup
4.3 Electrical and Instrument Setup
4.3.1 Power Connections
4.3.2 Thermocouple Placement
4.3.3 Search Coil Setup
4.3.4 Data Acquisition Setup
4.4 Experimental Procedure
4.4.1 Temperature Acquisition Tests
4.4.2 Search Coil Acquisition Tests
4.5 Procedural Notes
Chapter 5: Experimental Results
5.1 Thermal Results5.1.1 Steady-State Thermal Test Results
5.1.2 Start-up Thermal Test Results
5.2 Search Coil Results
5.2.1 Test for Low-Frequency Component
5.2.2 Test for Mid-Frequency Component
5.2.3 Test for High-Frequency Component
5.2.4 Direct Measurement Results During Acceleration
Chapter 6: Analysis of Experimental Results
6.1 Analysis of Thermal Test Results6.1.1 Rate-of-Rise Calculations
6.1.2 Current and Thermal Distribution
6.2 Analysis of Direct Measurement Test Results
6.2.1 Frequency Analysis
Chapter 7: Conclusions
7.1 Special Considerations with Thermal Tests7.2 Recommended Future Work