Motor management & VFD

This valuable workshop will cover technical and policy /procedure topics related to management of motor systems including:

• Evaluation and selection of optimum motors for specific applications.
• Identify the components and principles of operation for the major types of motors
• Development and use of motor repair and rewind guidelines.
• Electric power system and management of power transmission and driven loads in relation to motor
• Operation and use.
• Measure winding insulation resistance
• Measure winding resistance in motors
• Remove end bells, rotor, and bearings from an motor
• Inspect and clean end bells and rotors
• Reinstall bearings
• Reassemble an motor as well as perform operational tests on it

Course Overview VFD

• 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

Introduction

• Evolution of VFD Control
• Modern Types of Variable Frequency Drives (VFD)

Mechanical Theory

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

Basic VFD Electricity Theory

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

PWM AC VFDs

• 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

VFD 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