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Course
Outline
I.
Introduction
A.
Traditional
Methods Of Speed Control
B. History
of Electronic Speed Control
C. AC
& DC Theory
II.
Mechanical Theory
A. Horsepower
Defined
B. Torque
Defined
C. Common
Types of Mechanical Loads
D. Characteristics
of Typical Mechanical Types
E. Torque
Calculation Example
F. Introduction
to Motor Application
III.
Basic Electricity
A. Electrical Circuit Analogy
B. Resistance, Impedance, Reactance, Voltage, and Current Defined
C. Ohm's Law
D. Altering Current Wave Forms
E. RMS, Power Factor, Phasor Addition
IV.
Introduction to AC Motors
A. Examination
of Motor Namepates
B. Locked
Rotor Current and Full Load Current
C. Anatomy
of a Motor
D. Magnetic
Poles VS Speed
E. Torque
Characteristics Motors Operated " Across-the-Line"
V.
PWM AC Variable Speed Drives
A. Common
Types of PWM Drives
B. Examination
of the Main Power Circuit
C. Electronic
Component Identification
D.
Examination of the PWM Wave Form
E. Voltage
and Frequency Relationships and Effects on Motor Performance
F. Control
of Drive System Torque and Horsepower Output
G. Torque
Output Comparisons of AC Drives vs. Conventional Means of Speed
Control
H. Standing
Wave (Reflective Wave) Phenomena on Motor Cables
VI.
Programing and Operation of an AC Drive and Motor
A. Adjust
Minimum and Maximum Speed
B. Reset
Drive to Factory Defaults
C.
Adjusting Torque Output
E. General
Drive Programming
VII.
Conclusion and Summary
A. Trouble Shooting
B. Maintenance of a Variable Speed Drive
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