Variable Frequency Drives Training

Variable Frequency Drives Training - Click Here For Your FREE On-Site Training Quotation

Course Duration: 2 Days

Course Description:
The objective of this variable frequency drives training course is to build confidence in the student by providing him/her with useful information and practical hands-on exercises that demonstrate the relevance of the course material.

Who Should Attend:
This course is recommended for electrical engineers, technicians, designers and electrical maintenance personnel responsible for variable frequency drives.

Course Objectives:
This course is designed to enable participants to:

Properly Matching A Drive to A Machine
Choosing the Correct Motor
Choosing the Best Type of Variable Frequency Drive (VFD)
Identify & Correct Drive System Problems
Identify & Test Major Drive Components
Perform Start-Up of an AC Drive
Program & Adjust the Drive for Desired Operation

Course Outline:

I. INTRODUCTION

Evolution of Adjustable Speed Motor Control
Modern Types of Variable Frequency Drives

II. Mechanical Theory

Horsepower Defined
Torque Defined
Example Horsepower and Torque Calculations
Common Types of Mechanical Loads
Characteristics of Variable Torque and Constant Torque Loads

III. Basic Electricity Theory

Electrical/Hydraulic Circuit Analogy
Resistance, Voltage, and Current Defined

IV. Introduction to AC Motors

Examination of Motor Nameplates and NEMA Designations
Locked Rotor Current and Full Load Current
Anatomy of a Motor
Magnetic Poles and Frequency as Related to Motor Speed
Torque Characteristics Motors Operated “Across-the-Line”
Torque Characteristics of Motors Operated on VFDs
Effects VFDs on Motor Operation and Life Expectancy

V. PWM AC Variable Speed Drives

Common Types of PWM Drives
Examination of the Main Power Circuit
Electronic Component Identification
The PWM Wave Form
Voltage and Frequency Relationships and Effects on Motor Performance
Control of Drive System Torque and Horsepower Output
Torque Output Comparisons of AC Drives VS. Conventional Means of Speed Control
Standing Wave (Reflective Wave) Phenomena on Motor Cables
Disassembly of an AC Drive
Component Identification
Various Designs of Drives
Reassemble, Test, Start-Up of AC Drive With Proper Techniques
Hands-On Programming and Operation of an AC Drive and Motor
Adjust Minimum and Maximum Speed
Reset Drive to Factory Defaults
Adjusting Torque Output
General Drive Programming
Methods of Speed and Torque Control

VI. Applications

Methods of Proper Drive Selection
Multi-Motor Drive Systems With Example Problem
Using VFDs to Eliminate Geared Speed Reducers
Effects of AC Drives on Geared Speed Reducers
Replacing Mechanical Speed Changers With VFDs

VII. Conclusion and Summary

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