Distance - Motor Control & Variable Frequency Drives (1.2 CEU's)

Course Code: ELEC052d

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Duration

This course is approximately 3 weeks in duration.

Description

Variable frequency drives have become an essential part of our life today. This course is a MUST for anyone who is involved in the selection, applications, or maintenance of motors and variable frequency drives. This course provides the latest in technology. It covers how modern motors and variable frequency drives operate and the various options available. It also provides guidelines and rules that must be followed for a successful application. All maintenance issues are covered in detail.

The main part of the course concentrates on many guidelines and requirements that must be followed for a successful application.

There is also a section on how to select from the many options that you will see in the literature what they will do (or not do), and why you might want them. A section on common problems and troubleshooting is also very helpful for anyone who must diagnose or fix any of the problems that might occur.

Who Should Attend

Manufacturing, plant engineering and purchasing personnel
Manufacturing plant maintenance personnel
Consulting engineers
Drives and Motor Designers and Manufacturers
Electrical Technicians which have to maintain the setup the Electrical Drives

Dr. Eduard Loiczli

Dr. Eduard Loiczli is currently a Nuclear Integration Senior Electrical Engineer for Ontario Power Generation. He has more than 26 years' experience in Electrical Engineering and Controls and has made many achievements in the industry. He has designed programming applications for nuclear applications, SCADA and DCS. He has also created programming and integration solutions for oil extraction and an automated line for the glass industry. In addition to programming solutions, Dr. Loiczli has been project leader for design in many electrical projects. Dr. Loiczli is a member of IEEE, Ontario Fire Association and APEO. He is a Certified Nuclear Engineer.

Introduction to the Drive Systems, Speed; Torque and Position Control

Typical application for Speed Control
Typical Application for Torque Control
Typical Application for Position Control

Classification of the Drives, AC & DC Drives

Classification of the DC Drives
Classification of AC Drives: Induction Motor drives; Synchronous Motor drives

Electronic Components: Diodes; SCR; GTO; Bi-Polar Transistors; VMOS-FET; IGBT

Power Electronic Converters: Rectifier; Chopper; Inverter; Cyclo-Converters

Types and operation of the rectifiers with Natural Commutation
Types and operation of rectifiers with forced commutation
One two and Four operation rectifiers, 3; 6 and 12 pulse rectifiers
One; two and four quadrant operation Choppers
Typical structure of an inverter
Cyclo Converter typical structure and operation
Most frequent association of power converters for motor control application

DC Motor Control and Four Quadrant Operation

Horizontal Load (transportation) versus Gravitational load (hoist; elevator; crane)
Regenerative Braking for horizontal loads
Regenerative braking for Gravitational loads
Dynamic Breaking For Horizontal loads
Dynamic breaking for Gravitational loads
Plugging for Horizontal loads
Plugging for Gravitational loads

Choppers or DC-DC Converters, example of a Streetcar-Subway application

Control Example and characteristics for a four quadrant operation chopper
Compatibility between the power converter and the Motor Load System

DC Motor Close Loop Control-Tuning

DC Motor control, cascade control,
Operation without tachogenerator-IR compensation,
Tuning of a DC Drive
Operation in Speed Mode
Operation in Torque mode
Economy Mode Operation
Most important Manufacturers of DC Drive
DC Drive applications

Medium Voltage DC Drives

Typical Structure of a DC Medium Voltage DC Drive and application

Soft starters and application

Characteristics of the soft starters, why and how they are different from a drive
Typical applications for Soft-Starters

AC Drives, two stage power converters: rectifier DC Bus Inverter

Typical structure of a AC Drive
Protection of the AC Drive
Active and Passive snubbers
Packaging the Drive, the importance of the DC Buss Leakage Inductance
The Rectifier control
The Inverter Control
The DC Bus Capacitor Bank Charging System
Regenerative Units
Active Front end drive
Dynamic Breaking System
Output 3 % and 5% Filters
Typical Alarms and I/O of the drive

Scalar Versus VECTOR Drives, limitations of the SCALAR Drives

Principle of operation of the scalar drive-also known as VFD
settings of the VFD:
Volt/hertz,
DC Injection Breaking;
Dynamic Breaking;
Acceleration time;
Deceleration time;
Max and Min Speed;
Skip frequency;
Fly Catch
Carrier frequency
Slip Compensation
Close Loop Control of a VFD, slip regulator

Pulse Width Modulation and other Modulation used for harmonics Cancelation

Rectangular wave output inverters
Amplitude Modulation
Fix 3 pulse and 5 pulse modulation, implementation
Pulse Width Modulation and implementation
Harmonics and effects on the motor, methods of harmonics cancelation and attenuation
voltage and current harmonics, parasitic torque
induced eddy currents in the motor shaft and cancelation methods (Baldor ring)

Current Inverter SCR & GTO type, Design And Applications

Structure and functionality of the Current inverter
Critical design Consideration for Current Inverter
Close Loop Control for Current inverter
Typical Applications of the Current inverters, Medium Voltage drive
Implementation using GTO as oppose to SCR for the Inverter
Close loop control of the Current inverter for Synchronous Machine

Vector Control Strategy, types of vector control and application

Vector Control Principle-Rudolph Blaschke Model, Park transformation
Parameter Identification
Induction Motor characteristic when supplied from Vector or Field Oriented drive
Types of Field Orientations
Sensoreless Drives
Voltage and Current control of a Vector Drive
Performance of a Vector Drive using Field Orientation
Typical application of Field Orientation Drives

Direct Torque Control and applications

Principle of operation
Accelerated vector -Stator type field orientation
Typical application of a Direct Torque Control Drive
The capability of the DTC Drive
on the shelf drives incorporating DTC and Vector Control

Medium Voltage Drives and Application

Structure of a Voltage type medium Voltage drive
Typical control for medium Voltage drive
Applications of the medium voltage drive

Other dedicated drives customized for application, e.g. HVAC drives

Customization of drives for different application with reduced number of setting and parameters
Typical industrial applications which require dedicated drives

Sizing and selection of a drive, using manufacturer software

Kolmorgen; Rockwell and other software used for sizing and selection of the drive

Multi motor application

Typical issues in the multi-motor drive applications

High starting torque applications, induction motor specification

Rotork and Limitorque actuators

Electromechanical Speed Control Systems and applications

cross connect-voltage deep and winding stress
primary resistor starting
Autotransformer starting
Magnetic Amplifier
Split Phase Motor
Consequent Pole Motor
Unbalance starting
Star-Delta system
Forward-reverse System
Secondary resistor starting

Motor -Generator Groups and Application,

Ward-Leonard For Quadrant Operation Group
Wound Rotor induction motor Synchronized System for traveler Screens
MCC- Motor control Center Systems

Synchronous Motor Control

Importance of Grounding and Shielding - EMI

Servo Drives and Indexing Drives

Serial Real time communication Network-SERCOS

Motion Control Application for positioning

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