IEC TS 60034-25:2007
(Main)Rotating electrical machines - Part 25: Guidance for the design and performance of a.c. motors specifically designed for converter supply
Rotating electrical machines - Part 25: Guidance for the design and performance of a.c. motors specifically designed for converter supply
Describes the design features and performance characteristics of a.c. motors specifically designed for use on converter supplies. Also specifies the interface parameters and interactions between the motor and the converter including installation guidance as part of a power drive system. The scope of this second edition has been extended to include all converter-fed motors, in addition to low voltage induction motors.
General Information
Relations
Buy Standard
Standards Content (Sample)
TECHNICAL IEC
SPECIFICATION TS 60034-25
Second edition
2007-03
Rotating electrical machines –
Part 25:
Guidance for the design and performance of a.c.
motors specifically designed for converter supply
Reference number
IEC/TS 60034-25:2007(E)
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
• IEC Web Site (www.iec.ch)
• Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/searchpub) enables you to
search by a variety of criteria including text searches, technical committees
and date of publication. On-line information is also available on recently issued
publications, withdrawn and replaced publications, as well as corrigenda.
• IEC Just Published
This summary of recently issued publications (www.iec.ch/online_news/ justpub)
is also available by email. Please contact the Customer Service Centre (see
below) for further information.
• Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:
Email: custserv@iec.ch
Tel: +41 22 919 02 11
Fax: +41 22 919 03 00
TECHNICAL IEC
SPECIFICATION TS 60034-25
Second edition
2007-03
Rotating electrical machines –
Part 25:
Guidance for the design and performance of a.c.
motors specifically designed for converter supply
© IEC 2007 ⎯ Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale XB
International Electrotechnical Commission
ɆɟɠɞɭɧɚɪɨɞɧɚɹɗɥɟɤɬɪɨɬɟɯɧɢɱɟɫɤɚɹɄɨɦɢɫɫɢɹ
For price, see current catalogue
– 2 – TS 60034-25 © IEC:2007(E)
CONTENTS
FOREWORD.6
INTRODUCTION.8
1 Scope.9
2 Normative references .9
3 Terms and definitions .10
4 System characteristics.11
4.1 General .11
4.2 System information.11
4.3 Torque/speed considerations.12
4.4 Motor requirements .16
5 Losses and their effects (for induction motors fed from U-converters).18
5.1 General .18
5.2 Location of the additional losses due to converter supply and ways to
reduce them .18
5.3 Converter features to reduce the motor losses .18
5.4 Use of filters to reduce additional motor losses due to converter supply .20
5.5 Temperature and life expectancy.20
5.6 Determination of motor efficiency .21
6 Noise, vibration and torsional oscillation.21
6.1 Noise .21
6.2 Vibration (excluding torsional oscillation).24
6.3 Torsional oscillation .25
7 Motor insulation electrical stresses.25
7.1 General .25
7.2 Causes.25
7.3 Winding electrical stress.27
7.4 Insulation stress limitation .29
7.5 Responsibilities .29
7.6 Converter characteristics.30
7.7 Methods of reduction of voltage stress .31
7.8 Motor choice .31
8 Bearing currents .32
8.1 Sources of bearing currents in converter-fed motors.32
8.2 Generation of high-frequency bearing currents .32
8.3 Common mode circuit.34
8.4 Stray capacitances .34
8.5 Consequences of excessive bearing currents .36
8.6 Preventing high-frequency bearing current damage.36
8.7 Additional considerations for motors fed by high voltage U-converters .38
8.8 Bearing current protection for motors fed by high-voltage current-source
converters (I-converters) .39
9 Installation.39
9.1 Earthing, bonding and cabling .39
9.2 Reactors and filters .45
9.3 Integral motors (integrated motor and drive modules).46
TS 60034-25 © IEC:2007(E) – 3 –
10 Additional considerations for permanent magnet (PM) synchronous motors fed by
U-converters.47
10.1 System characteristics .47
10.2 Losses and their effects .47
10.3 Noise, vibration and torsional oscillation.47
10.4 Motor insulation electrical stresses.47
10.5 Bearing currents.48
10.6 Particular aspects of permanent magnets .48
11 Additional considerations for cage induction motors fed by high voltage U-
converters .48
11.1 General .48
11.2 System characteristics .48
11.3 Losses and their effects .50
11.4 Noise, vibration and torsional oscillation.50
11.5 Motor insulation electrical stresses.51
11.6 Bearing currents.53
12 Additional considerations for synchronous motors fed U-converters.53
12.1 System characteristics .53
12.2 Losses and their effects .53
12.3 Noise, vibration and torsional oscillation.53
12.4 Motor insulation electrical stresses.53
12.5 Bearing currents.53
13 Additional considerations for cage induction motors fed by block-type I-converters .54
13.1 System characteristics .54
13.2 Losses and their effects .55
13.3 Noise, vibration and torsional oscillation.55
13.4 Motor insulation electrical stresses.56
13.5 Bearing currents.56
13.6 Additional considerations for six-phase cage induction motors .56
14 Additional considerations for synchronous motors fed by LCI .56
14.1 System characteristics .56
14.2 Losses and their effects .58
14.3 Noise, vibration and torsional oscillation.58
14.4 Motor insulation electrical stresses.58
14.5 Bearing currents.58
15 Additional considerations for pulsed I-converters (PWM CSI) feeding induction
motors .58
15.1 System characteristics .58
15.2 Losses and their effects .59
15.3 Noise, vibration and torsional oscillation.59
15.4 Motor insulation electrical stresses.59
15.5 Bearing currents.59
16 Other motor/converter systems.60
16.1 Drives supplied by cyclo-converters .60
16.2 Wound rotor induction (asynchronous) machines supplied by I-converters in
the rotor circuit .61
16.3 Wound rotor induction (asynchronous) machines supplied by U-converters in
the rotor circuit .61
– 4 – TS 60034-25 © IEC:2007(E)
Annex A (normative) Converter characteristics .63
Annex B (informative) Converter output spectra.67
Annex C (informative) Noise increments due to converter supply .70
Bibliography.71
Figure 1 – Torque/speed capability .13
Figure 2 – Converter output current .13
Figure 3 – Converter output voltage/frequency characteristics .15
Figure 4 – Example of measured
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.