Ac Motors, Single And Three Phase

Understanding the construction, operation, and wiring of AC single and three phase motors.

What you'll learn

Review of AC generation theory applied to AC motor

Understand the construction and operation of a single phase motor

Wire a dual voltage single phase motor for low and high voltage operation

Wire a dual voltage single phase motor for forward and reverse operation

Review three phase generation

Understand the construction and operation of a three phase motor

Wire a dual voltage three phase motor for low and high voltage operation

Wire a dual voltage single phase motor for forward and reverse operation

Requirements

Students should have a good understanding of DC and AC theory particularly how magnetic fields operate.

Description

In this course students will learn the operation, construction, and wiring of single phase motors. It will begin with a review of single phase AC generation and how it directly applies to the operation of single phase AC motors. With graphics and demonstrations, we will the look into the construction of an AC motor and discuss the interactions of magnetic fields created by the AC action. You will learn why a single phase motor is not self-starting, and the methods and materials used to start this motor such as the split-phase and the centrifugal switch.  We will then wire the single phase motor for dual voltage operation; 120 and 208 volts respectively. After this, the students will be able to see how a single phase motor is reversed. We will discuss the purpose of adding a capacitor for the starting operation of a single phase motor.  Next, we will look at the construction, operation, and wiring of a three phase dual voltage motor for dual voltage operating. There will be a review of three phase generation and how it aids in the starting and running of the motor.  You'll see how a three phase motor is wired for low and high voltage operation, and how the three phase motor is reversed.  You'll learn about the nameplate data that is required by NEMA to include voltage, amperage, HP rating, number of phases, ambient temperature ratings, frame size, code letters that represent the start up inrush current allowed for the motor, and the service factor (SF) which lets you know what percentage above rated wattages the motor can safely operate.

Overview

Section 1: Introduction

Lecture 1 Introduction

Section 2: Review of AC Generation

Lecture 2 AC Generation Review

Section 3: Motor Action

Lecture 3 How motors work

Section 4: AC Motor Action 2

Lecture 4 AC Motor Action 2

Section 5: The Rotor Defined

Lecture 5 The Rotor Defined

Section 6: The Start Winding

Lecture 6 The Start Winding

Section 7: The Capacitor Start Motor

Lecture 7 The Capacitor Start Motor

Section 8: Dual Voltage Motors

Lecture 8 Dual Voltage Motors

Section 9: Dual Voltage Motors (Cont.)

Lecture 9 Dual Voltage Motors (Cont.)

Section 10: Introduction to 3 Phase Motors

Lecture 10 Introduction to 3 Phase Motors

Section 11: Single voltage 3 Phase Motors

Lecture 11 Single Voltage 3 Phase Motors

Section 12: 3 phase high voltage configuration

Lecture 12 3 phase high voltage configuration

Section 13: 3 Phase Low Voltage Configuration

Lecture 13 3 Phase Low Voltage Operation

Section 14: Testing Out the Motor

Lecture 14 Testing Out the Motor

Students in this course should have an interest in getting into electromechanical fields particularly how they relate to manufacturing processes.