SIST-TS CLC/TS 60034-25:2006
(Main)Rotating electrical machines -- Part 25: Guide for the design and performance of cage induction motors specifically designed for converter supply
Rotating electrical machines -- Part 25: Guide for the design and performance of cage induction motors specifically designed for converter supply
This part of IEC 60034 describes the design features and performance characteristics of polyphase cage induction motors specifically designed for use on voltage source converter supplies up to 1 000 V. It also specifies the interface parameters and interactions between the motor and the converter including installation guidance as part of a power drive system. NOTE 1 For motors operating in potentially explosive atmospheres, additional requirements as described in the IEC 60079 series apply. NOTE 2 This technical report is not primarily concerned with safety. However, some of its recommendations may have implications for safety, which should be considered as necessary. NOTE 3 Where a converter manufacturer provides specific installation recommendations, they should take precedence over the recommendations of this technical report.
Drehende elektrische Maschinen -- Teil 25: Leitfaden für den Entwurf und das Betriebsverhalten von Induktionsmotoren mit Käfigläufer, die speziell für Umrichterbetrieb bemessen sind
Rotacijski električni stroji – 25. del: Smernice za konstrukcijo in karakteristike asinhronskih motorjev s kratkostično kletko, posebej narejenih za napajanje s pretvornikom
General Information
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Standards Content (Sample)
SLOVENSKI SIST-TS CLC/TS 60034-25:2006
STANDARD
januar 2006
Rotacijski električni stroji – 25. del: Smernice za konstrukcijo in karakteristike
asinhronskih motorjev s kratkostično kletko, posebej narejenih za napajanje s
pretvornikom
(istoveten CLC/TS 60034-25:2005)
Rotating electrical machines – Part 25: Guide for the design and performance of
cage induction motors specifically designed for converter supply
ICS 29.160.30 Referenčna številka
SIST-TS CLC/TS 60034-25:2006(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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TECHNICAL SPECIFICATION CLC/TS 60034-25
SPECIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION October 2005
ICS 29.160
English version
Rotating electrical machines
Part 25: Guide for the design and performance
of cage induction motors
specifically designed for converter supply
Drehende elektrische Maschinen
Teil 25: Leitfaden für den Entwurf
und das Betriebsverhalten von
Induktionsmotoren mit Käfigläufer,
die speziell für Umrichterbetrieb
bemessen sind
This Technical Specification was approved by CENELEC on 2005-06-04.
CENELEC members are required to announce the existence of this TS in the same way as for an EN and to
make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting
national standards in force.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 60034-25:2005 E
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CLC/TS 60034-25:2005 - 2 -
Foreword
The text of the Technical Specification IEC/TS 60034-25:2004, prepared by IEC TC 2, Rotating
machinery, was submitted to the formal vote and was approved by CENELEC as CLC/TS 60034-25
on 2005-06-04.
The following date was fixed:
– latest date by which the existence of the CLC/TS
has to be announced at national level (doa) 2005-12-04
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the Technical Specification IEC/TS 60034-25:2004 was approved by CENELEC as a
Technical Specification without any modification.
__________
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- 3 - CLC/TS 60034-25:2005
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60034-1 - Rotating electrical machines EN 60034-1 2004
Part 1: Rating and performance
IEC 60034-2 1972 Part 2: Methods for determining losses
+ IEC 60034-2A 1974 and efficiency of rotating electrical EN 60034-2 1996
machinery from tests (excluding
machines for traction vehicles)
A1 1995 A1 1996
A2 1996 A2 1996
1) 2)
IEC 60034-6 - Part 6: Methods of cooling (IC Code) EN 60034-6 1993
1) 2)
IEC 60034-9 - Part 9: Noise limits EN 60034-9 2005
(mod)
1) 2)
IEC 60034-14 - Part 14: Mechanical vibration of certain EN 60034-14 2004
machines with shaft heights 56 mm and
higher - Measurement, evaluation and
limits of vibration severity
1) 2)
IEC/TS 60034-17 - Part 17: Cage induction motors when fed CLC/TS 60034-17 2004
from converters - Application guide
1) 2)
IEC 61800-2 - Adjustable speed electrical power drive EN 61800-2 1998
systems
Part 2: General requirements - Rating
specifications for low voltage adjustable
frequency a.c. power drive systems
1) 2)
IEC 61800-3 - Part 3: EMC requirements and specific EN 61800-3 2004
test methods
1) 2)
IEC 61800-5-1 - Part 5-1: Safety requirements - Electrical, EN 61800-5-1 2003
thermal and energy
1)
Undated reference.
2)
Valid edition at date of issue.
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TECHNICAL IEC
SPECIFICATION TS 60034-25
First edition
2004-04
Rotating electrical machines –
Part 25:
Guide for the design and performance
of cage induction motors specifically designed
for converter supply
IEC 2004 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 X
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
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– 2 – TS 60034-25 IEC:2004(E)
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.8
2 Normative references .8
3 Terms and definitions .9
4 System characteristics.10
4.1 General .10
4.2 System information.10
4.3 Torque/speed considerations.10
4.3.1 General .10
4.3.2 Torque/speed capability.11
4.3.3 Voltage/speed characteristics .12
4.3.4 Limiting factors on torque/speed capability .12
4.3.5 Resonant speed bands .13
4.3.6 Duty cycles.13
4.4 Converter control types .13
4.4.1 General .13
4.4.2 Converter type considerations .14
4.5 Converter output voltage generation.15
4.5.1 Pulse Width Modulation (PWM) .15
4.5.2 Hysteresis (sliding mode) .15
4.5.3 Influence of switching frequency.16
4.5.4 Multi-level converters .17
4.6 Motor requirements .17
5 Losses and their effects.19
5.1 General .19
5.2 Losses in motors supplied from voltage-source converters .19
5.3 Location of the extra losses and ways to reduce them .20
5.4 Converter features to reduce the motor losses .20
5.5 Temperature and life expectancy.21
5.6 Determination of motor efficiency .21
6 Noise, vibration and oscillating torques .21
6.1 Noise and vibration in an induction motor supplied from a converter.21
6.1.1 General .21
6.1.2 Changes in noise emission due to changes in speed .22
6.1.3 Magnetically excited noise.23
6.1.4 Torsional oscillation.23
6.2 Sound power level determination and limits .24
6.2.1 Methods of measurement .24
6.2.2 Test conditions .24
6.2.3 Sound power level limits .24
6.3 Vibration level determination and limits .24
6.3.1 Method of measurement .24
6.3.2 Test conditions .25
6.3.3 Vibration level limits .25
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TS 60034-25 IEC:2004(E) – 3 –
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 .30
7.8 Motor choice .31
8 Bearing currents .31
8.1 Sources of bearing currents in converter-fed motors.31
8.1.1 General .31
8.1.2 Magnetic asymmetry.31
8.1.3 Electrostatic buildup .32
8.1.4 High frequency voltages .32
8.2 Generation of high frequency bearing currents .32
8.2.1 General .32
8.2.2 Circulating current .33
8.2.3 Shaft grounding current .33
8.2.4 Capacitive discharge current .33
8.3 Common-mode circuit.33
8.3.1 General .33
8.3.2 System common-mode current flow .33
8.4 Stray capacitances .34
8.4.1 General .34
8.4.2 Major component of capacitance .34
8.4.3 Other capacitances.35
8.5 Consequences of excessive bearing currents .35
8.6 Preventing high frequency bearing current damage .36
8.6.1 Basic approaches .36
8.6.2 Other preventive measures.36
9 Installation.38
9.1 Grounding, bonding and cabling .38
9.1.1 General .38
9.1.2 Grounding .38
9.1.3 Bonding of motors .39
9.1.4 Motor power cables .39
9.2 Reactors and filters .44
9.2.1 General .44
9.2.2 Output reactors.44
9.2.3 Voltage limiting filter (dv/dt filter) .44
9.2.4 Sinusoidal filter.44
9.2.5 Motor termination unit.44
Annex A (informative) Converter output spectra.46
Bibliography.48
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– 4 – TS 60034-25 IEC:2004(E)
Figure 1 – Component parts of a PDS.7
Figure 2 – Torque/speed capability .11
Figure 3 – Converter output current .11
Figure 4 – Converter output voltage .12
Figure 5 – Effects of switching frequency on motor and converter losses .16
Figure 6 – Effects of switching frequency on acoustic noise.16
Figure 7 – Effects of switching frequency on torque ripple .17
Figure 8 – Example of measured losses W, as a function of frequency f and supply type .19
Figure 9 – Additional losses ΔW of a motor (same motor as Figure 8) due to converter
supply, as a function of pulse frequency fp, at 50 Hz rotational frequency.20
Figure 10 – Fan noise as a function of fan speed.22
Figure 11 – Typical surges at the terminals of a motor fed from a PWM converter .26
Figure 12 – Typical voltage surges on one phase at the converter and at the motor
terminals (2 ms/division) .26
Figure 13 – Individual short rise time surge from Figure 12 (1 μs/division) .27
Figure 14 – Definition of the peak rise time t of the voltage at the motor terminals .28
r
Figure 15 – First turn voltage as a function of the surge rise time .28
Figure 16 – Discharge pulse occurring as a result of converter generated voltage surge
at motor terminals (100 ns/division) .29
Figure 17 – Limiting curves of impulse voltage V , measured between two motor
pk
phase terminals, as a function of the impulse rise time t .30
r
Figure 18 – Possible bearing currents.32
Figure 19 – Motor capacitances .35
Figure 20 – Bearing pitting due to electrical discharge (pit diameter 30 μm to 50 μm) .36
Figure 21 – Fluting due to excessive bearing current .36
Figure 22 – Bonding strap from motor terminal box to motor frame .39
Figure 23 – Examples of shielded motor cables and connections .40
Figure 24 – Parallel symmetrical cabling of high-power converter and motor.41
Figure 25 – Converter connections with 360º HF cable glands, showing the ‘Faraday Cage’ 42
Figure 26 – Motor end termination with 360º connection .42
Figure 27 – Cable shield connection .43
Figure 28 – Characteristics of preventative measures .45
Figure A.1 – Typical frequency spectra of converter output voltage of a) constant
frequency PWM control and b) hysteresis control.46
Figure A.2 – Typical frequency spectra of converter output voltage of a) random PWM
control and b) hysteresis control .47
Figure A.3 – Typical time characteristics of motor current of a) constant frequency
PWM control and b) hysteresis control .47
Table 1 – Significant factors affecting torque/speed capability .12
Table 2 – Motor design considerations.17
Table 3 – Motor parameters .18
Table 4 – Sound power level as a function of output power.24
Table 5 – Effectiveness of bearing current countermeasures .37
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TS 60034-25 IEC:2004(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 25: Guide for the design and performance of cage induction motors
specifically designed for converter supply
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• The subject is still under technical development or where, for any other reason, there is
the future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 60034-25, which is a technical specification, has been prepared by IEC technical
committee 2: Rotating machinery.
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– 6 – TS 60034-25 IEC:2004(E)
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
2/1271/DTR 2/1288/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual edition of this Technical Specification may be issued at a later date.
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TS 60034-25 IEC:2004(E) – 7 –
INTRODUCTION
This introduction is intended to explain the aim of this part of IEC 60034.
Motor categories
There are 2 categories of cage induction motors, which can be applied in variable speed
electric drive systems.
• Standard cage induction motors, designed for general purpose application. The design
and performance of these motors are optimized for operation on a fixed-frequency
sinusoidal supply. Nevertheless they are generally also appropriate for use in variable
speed drive systems.
Guidance on this field of application is given in IEC 60034-17.
• Cage induction motors specifically designed for converter operation. The design and
construction of such motors may be based on standard motors with standardized frame
sizes and dimensions, but with modifications for converter operation.
This category is covered by this part of IEC 60034, and it is recommended that the motor
be marked with a reference to this part of IEC 60034.
Motors for converter supplies greater than 1 000 V, or for converters other than voltage
source, will be considered in later editions of this part of IEC 60034.
Incorporation of the motor into the power drive system
Figure 1 illustrates the Power Drive System (PDS). A PDS consists of a motor and a
Complete Drive Module (CDM). It does not include the equipment driven by the motor. The
CDM consists of a Basic Drive Module (BDM) and its possible extensions such as the feeding
section or some auxiliaries (for example ventilation). The BDM contains converter, control and
self-protection functions. The rating and performance of the complete PDS is covered in
general by IEC 61800-2.
NOTE Figure 1 of IEC 61800-2 provides further details of the structure of a PDS.
The motor itself and additional specific requirements for its proper incorporation into the PDS
are covered by the IEC 60034 series.
Power supply
V-Power supply
System Standard
Power Drive
System (PDS)
IEC 61800-2
IEC 61800
- rating specification and performance of the complete
(all parts)
not
PDS – for individual subsystem units
Power
- converter characteristics and their relationship with
conversion
the PDS
IEC 60146
Control,
- application guideline (control strategies, diagnostics,
(all parts)
protection
topologies)
and
auxiliaries
Guides for converter supplied
Motor
cage induction motors
IEC 60034 M
(all parts)
IEC 60034-17 general purpose motors
IEC 60034-25 motors specifically designed for
converter operation
Driven equipment
IEC 445/04
Figure 1 – Component parts of a PDS
Environment, installation
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– 8 – TS 60034-25 IEC:2004(E)
ROTATING ELECTRICAL MACHINES –
Part 25: Guide for the design and performance of cage induction motors
specifically designed for converter supply
1 Scope
This part of IEC 60034 describes the design features and performance characteristics of
polyphase cage induction motors specifically designed for use on voltage source converter
supplies up to 1 000 V. It also specifies the interface parameters and interactions between the
motor and the converter including installation guidance as part of a power drive system.
NOTE 1 For motors operating in potentially explosive atmospheres, additional requirements as described in the
IEC 60079 series apply.
NOTE 2 This technical report is not primarily concerned with safety. However, some of its recommendations may
have implications for safety, which should be considered as necessary.
NOTE 3 Where a converter manufacturer provides specific installation recommendations, they should take
precedence over the recommendations of this technical rep
...
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