SIST-TS CLC/TS 60034-25:2009

Rotating electrical machines - Part 25: Guide for the design and performance of a.c. motors specifically designed for converter supply (IEC/TS 60034-25:2007)

This part of IEC 60034 describes the design features and performance characteristics of a.c. motors specifically designed for use on converter supplies. It also specifies the interface parameters and interactions between the motor and the converter including installation guidance as part of a power drive system. The general requirements of relevant parts of the IEC 60034 series of standards also apply to motors within the scope of this technical specification.

Drehende elektrische Maschinen - Teil 25: Leitfaden für den Entwurf und das Betriebsverhalten von Induktionsmotoren mit Käfigläufer, die speziell für Umrichterbetrieb bemessen sind (IEC/TS 60034-25:2007)

Machines électriques tournantes - Partie 25: Guide pour la conception et les performances des moteurs c.a. spécialement conçus pour une alimentation par convertisseurs (CEI/TS 60034-25:2007)

Električni rotacijski stroji - 25. del: Smernice za konstrukcijo in karakteristike asinhronskih motorjev s kratkostično kletko, posebej narejenih za napajanje s pretvornikom (IEC/TS 60034-25:2007)

General Information

• Status: Published
• Publication Date: 23-Dec-2008
• ICS: 29.160.01 - Rotating machinery in general
• Technical Committee: ERS - Rotating machinery
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 23-Dec-2008
• Due Date: 27-Feb-2009
• Completion Date: 24-Dec-2008
• Ref Project: CLC/TS 60034-25:2008 - Rotating electrical machines - Part 25: Guidance for the design and performance of a.c. motors specifically designed for converter supply

Relations

• Replaces: SIST-TS CLC/TS 60034-25:2006 - Rotating electrical machines -- Part 25: Guide for the design and performance of cage induction motors specifically designed for converter supply
• Effective Date: 01-Feb-2009
• Replaces: SIST-TS CLC/TS 60034-25:2006 - Rotating electrical machines -- Part 25: Guide for the design and performance of cage induction motors specifically designed for converter supply
• Effective Date: 13-May-2010
• Replaces: SIST-TS CLC/TS 60034-25:2006 - Rotating electrical machines -- Part 25: Guide for the design and performance of cage induction motors specifically designed for converter supply
• Effective Date: 28-Jan-2023
• Replaces: SIST-TS CLC/TS 60034-25:2006 - Rotating electrical machines -- Part 25: Guide for the design and performance of cage induction motors specifically designed for converter supply
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS CLC/TS 60034-25:2009
02-februar-2009
1DGRPHãþD
SIST-TS CLC/TS 60034-25:2006
(OHNWULþQLURWDFLMVNLVWURMLGHO6PHUQLFH]DNRQVWUXNFLMRLQNDUDNWHULVWLNH
DVLQKURQVNLKPRWRUMHYVNUDWNRVWLþQRNOHWNRSRVHEHMQDUHMHQLK]DQDSDMDQMHV
SUHWYRUQLNRP,(&76
Rotating electrical machines - Part 25: Guide for the design and performance of a.c.
motors specifically designed for converter supply (IEC/TS 60034-25:2007)
Drehende elektrische Maschinen - Teil 25: Leitfaden für den Entwurf und das
Betriebsverhalten von Induktionsmotoren mit Käfigläufer, die speziell für
Umrichterbetrieb bemessen sind (IEC/TS 60034-25:2007)
Machines électriques tournantes - Partie 25: Guide pour la conception et les
performances des moteurs c.a. spécialement conçus pour une alimentation par
convertisseurs (CEI/TS 60034-25:2007)
Ta slovenski standard je istoveten z: CLC/TS 60034-25:2008
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
SIST-TS CLC/TS 60034-25:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TS CLC/TS 60034-25:2009

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SIST-TS CLC/TS 60034-25:2009

TECHNICAL SPECIFICATION
CLC/TS 60034-25

SPÉCIFICATION TECHNIQUE
December 2008
TECHNISCHE SPEZIFIKATION

ICS 29.160 Supersedes CLC/TS 60034-25:2005


English version


Rotating electrical machines -
Part 25: Guidance for the design and performance of a.c. motors
specifically designed for converter supply
(IEC/TS 60034-25:2007)









This Technical Specification was approved by CENELEC on 2008-07-18.

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, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the 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


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 60034-25:2008 E

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SIST-TS CLC/TS 60034-25:2009
CLC/TS 60034-25:2008 - 2 -
Foreword
The text of the Technical Specification IEC/TS 60034-25:2007, prepared by IEC TC 2, Rotating
machinery, was circulated for voting in accordance with the Internal Regulations, Part 2,
Subclause 11.3.3.3 and was approved by CENELEC as CLC/TS 60034-25 on 2008-07-18.
This Technical Specification supersedes CLC/TS 60034-25:2005.
CLC/TS 60034-25:2008 contains the following significant technical changes with respect to
CLC/TS 60034-25:2005:
– replacement of the original introduction by a shorter introduction;
– extension of the scope to include all converter-fed motors, not just LV-induction motors;
– minor changes throughout Clauses 4 to 9;
– addition of Subclauses 4.3.4, 4.3.5, 5.4, 6.2.1, 8.6.3, 8.7 and 8.8, and Figure 7;
– inclusion of Subclauses 4.4 and 4.5 in Annex A;
– expansion of original Annex A which becomes Annex B;
– re-drafting of Clause 5;
– upgrading of 6.1.4 to 6.3;
– removal of noise limits from normative text;
– addition of reference to EN 60034-9;
– addition of Annex C.
The following date was fixed:
– latest date by which the existence of the CLC/TS
has to be announced at national level (doa) 2009-01-18
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the Technical Specification IEC/TS 60034-25:2007 was approved by CENELEC as a
Technical Specification without any modification.
__________

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SIST-TS CLC/TS 60034-25:2009
- 3 - CLC/TS 60034-25:2008

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  When 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


1) 3) 2)
IEC 60034-2 - Rotating electrical machines - EN 60034-2 1996
Part 2: Methods for determining losses and
efficiency of rotating electrical machinery from
tests (excluding machines for traction
vehicles)


1) 2)
IEC 60034-6 - Rotating electrical machines - EN 60034-6 1993
Part 6: Methods of cooling (IC Code)


1) 2)
IEC 60034-9 (mod) - Rotating electrical machines - EN 60034-9 2005
Part 9: Noise limits


1) 2)
IEC 60034-14 - Rotating electrical machines - EN 60034-14 2004
Part 14: Mechanical vibration of certain
machines with shaft heights 56 mm and
higher - Measurement, evaluation and limits of
vibration severity


IEC/TS 60034-17 2006 Rotating electrical machines - - -
Part 17: Cage induction motors when fed from
converters - Application guide


1)
IEC/TR 61000-5-1 - Electromagnetic compatibility (EMC) - - -
Part 5: Installation and mitigation guidelines -
Section 1: General considerations


1)
IEC 61000-5-2 - Electromagnetic compatibility (EMC) - - -
Part 5: Installation and mitigation guidelines -
Section 2: Earthing and cabling


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 - Adjustable speed electrical power drive EN 61800-3 2004
systems -
Part 3: EMC requirements and specific test
methods



1)
Undated reference.
2)
Valid edition at date of issue.
3)
EN 60034-2 includes supplement A:1974 to IEC 60034-2:1972. It is partly superseded by EN 60034-2-1:2007, which is based
   on IEC 60034-2-1:2007

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SIST-TS CLC/TS 60034-25:2009
CLC/TS 60034-25:2008 - 4 -

Publication Year Title EN/HD Year

1) 2)
IEC 61800-5-1 - Adjustable speed electrical power drive EN 61800-5-1 2007
systems -
Part 5-1: Safety requirements - Electrical,
thermal and energy


1) 2)
IEC 61800-5-2 - Adjustable speed electrical power drive EN 61800-5-2 2007
systems -
Part 5-2: Safety requirements - Functional

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SIST-TS CLC/TS 60034-25:2009
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)

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SIST-TS CLC/TS 60034-25:2009
– 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

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SIST-TS CLC/TS 60034-25:2009
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

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SIST-TS CLC/TS 60034-25:2009
– 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 losses P as a function of frequency f and supply type.19
L
Figure 5 – Additional losses ΔP of a motor (same motor as Figure 4) due to converter
L
supply, as a function of pulse frequency f , at 50 Hz rotational frequency .20
p
Figure 6 – Fan noise as a function of fan speed.22
Figure 7 – Vibration modes .23
Figure 8 – Typical surges at the terminals of a motor fed from a PWM converter .26
Figure 9 – Typical voltage surges on one phase at the converter and at the motor
terminals (2 ms/division) .26
Figure 10 – Individual short rise time surge from Figure 9 (1 μs/division) .27
Figure 11 – Definition of the peak rise time t of the voltage at the motor terminals .28
r
Figure 12 – First turn voltage as a function of the peak rise time.28
Figure 13 – Discharge pulse occurring as a result of converter generated voltage surge
at motor terminals (100 ns/division) .29
Figure 14 – Limiting curves of impulse voltage U , measured between two motor
pk
phase terminals, as a function of the peak rise time t .30
r
Figure 15 – Possible bearing currents.33
Figure 16 – Motor capacitances .35
Figure 17 – Bearing pitting due to electrical discharge (pit diameter 30 μm to 50 μm) .36
Figure 18 – Fluting due to excessive bearing current .36
Figure 19 – Bonding strap from motor terminal box to motor frame .41
Figure 20 – Examples of shielded motor cables and connections .42
Figure 21 – Parallel symmetrical cabling of high-power converter and motor.43
Figure 22 – Converter connections with 360º HF cable glands showing the Faraday
cage .43
Figure 23 – Motor end termination with 360º connection .44
Figure 24 – Cable shield connection .44
Figure 25 – Characteristics of preventative measures .46
Figure 26 – Schematic of typical three-level converter .49
Figure 27 – Output voltage and current from typical three-level converter .49
Figure 28 – Typical first turn voltage ΔU (as a percentage of the line-to-ground voltage)
as a function of du/dt .51
Figure 29 – Medium-voltage and high-voltage form-wound coil insulating and voltage
stress control materials.52
Figure 30 – Schematic of block-type I-converter .54
Figure 31 – Current and voltage waveforms of block-type I-converter .54

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SIST-TS CLC/TS 60034-25:2009
TS 60034-25 © IEC:2007(E) – 5 –
Figure 32 – Schematic and voltage and current waveforms for a synchronous motor
supplied from an I-converter .57
Figure 33 – Schematic of pulsed I-converter .58
Figure 34 – Voltages and currents of pulsed I-converter .59
Figure 35 – Schematic of cyclo-converter .60
Figure 36 – Voltage and current waveforms of a cyclo-converter.60
Figure A.1 – Effects of switching frequency on motor and converter losses.65
Figure A.2 – Effects of switching frequency on acoustic noise.66
Figure A.3 – Effects of switching frequency on torque ripple .66
Figure B.1 – Typical frequency spectra of converter output voltage.67
Figure B.2 – Typical frequency spectra of converter output voltage.67
Figure B.3 – Typical spectra of converter output voltage.68
Figure B.4 – Typical time characteristics of motor current .68
Figure B.5 – Typical time characteristics of motor current .69
Table 1 – Alphabetical list of terms .10
Table 2 – Significant factors affecting torque/speed capability .14
Table 3 – Motor design considerations.16
Table 4 – Motor parameters .17
Table 5 – Effectiveness of bearing current countermeasures .37
Table C.1 – Noise increments .70

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SIST-TS CLC/TS 60034-25:2009
– 6 – TS 60034-25 © IEC:2007(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 25: Guidance for the design and performance of a.c. motors
specifically designed for converter supply
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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 technic
...