Vfd´s

Technical guide book

ABB drives
Technical guide book

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Technical guide book

ABB drives
Technical guide book

3AFE64514482 REV D EFFECTIVE: 21.7.2008

© Copyright 2008 ABB. All rights reserved.

Technical guide book

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Technical guide book

Contents
1. Direct Torque Control explains what DTC is; why and how it has evolved; the basic theory behind itssuccess; and the features and benefits of this new technology. 2. EU Council Directives and adjustable speed electrical power drive systems is to give a straightforward explanation of how the various EU Council Directives relate to Power Drive Systems. 3. EMC compliant installation and configuration for a power drive system assists design and installation personnel when trying to ensurecompliance with the requirements of the EMC Directive in the user’s systems and installations when using AC Drives. 4. Guide to variable speed drives describes basics of different variable speed drives (VSD) and how they are used in industrial processes.

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5. Bearing currents in modern AC drive systems explains how to avoid damages.

6. Guide to harmonics with AC drivesdescribes harmonic distortion, its sources and effect, and also distortion calculation and evaluation with special attention to the methods for reducing harmonics with AC drives. 7. Dimensioning of a drive system. Making dimensioning correctly is the fastest way of saving money. Biggest savings can be achieved by avoiding very basic mistakes. These dimensioning basics and beyond can be foundin this guide. 8. Electrical braking describes the practical solutions available in reducing stored energy and transferring stored energy back into electrical energy. 9. Guide to motion control drives gives an overview of high performance drives and motion control.

Technical guide book

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Technical guide book

Technical guide No. 1

ABB drives
Direct Torque Control theworld’s most advanced AC drive technology

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Technical guide No. 1 - Direct Torque Control

1

ABB drives
Direct Torque Control the world’s most advanced AC drive technology

Technical guide No. 1

3AFE58056685 REV C EFFECTIVE: 21.7.2008

© Copyright 2006 ABB. All rights reserved.

4

Technical guide No. 1 - Direct Torque Control

Contents
Chapter 1 - Introduction........................................................................ 7 General ........................................................................................................ 7 This manual’s purpose.................................................................................. 7 Using thisguide............................................................................................ 7 What is a variable speed drive? .................................................................... 8 Summary ..................................................................................................... 8 Chapter 2 - Evolution of Direct Torque Control ..................................... 8 DC MotorDrives........................................................................................... 9 Features .................................................................................................. 9 Advantages ............................................................................................. 9 Drawbacks ............................................................................................ 10 AC Drives - Introduction............................................................................. 10 AC Drives -frequency control using PWM ................................................... 11 Features ................................................................................................ 11 Advantages ........................................................................................... 12 Drawbacks...