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INTERNATIONAL ELECTROTECHNICAL COMMISSION
We make electro technology work for you.
Update on IEC Motor
and Converter Standards
Martin Doppelbauer Univ.-Prof. Dr.-Ing. Chairman IEC TC2 Karlsruhe Institute of Technology (KIT) Institute of Electrical Engineering (ETI) Karlsruhe, Germany
IEC 60034-30-1/-2 – Scope
IEC 60034-30-2 Energy Efficiency classification of variable speed motors as a component
60034-30-1 60034-30-2
Supply Grid Frequency Converter
Frequency Converter only Servo Drive
Motor Standard IM LSPM
SynRM PMSM Servo PMSM
Eff. Label IE1, 2, 3, 4 IE1, 2, 3, 4, 5 not applicable
Market* 60 % 30 % <1% 10 % * rough estimate
The purpose of IEC/TS 60034-30-2 is to create a level playing field between established and new, innovative motor technologies
in order to enable fair competition and market development.
Established Technologies
Unconventional Technologies
Image Source: ABB, SEW Eurodrive
IEC 60034-30-2 – Scope
Covered Industrial motors which mostly run continuously at or near rated load, and whose speed is not required to change often or rapidly.
Not Covered Motors that are designed for servo applications, i.e. applications where frequent overload or field-weakening operations or frequent speed or torque changes occur or no thermal steady state operation is reached.
IEC 60034-30-2 Energy Efficiency classification of variable speed motors as a component
Image Source: ABB, SEW Eurodrive
IEC 60034-30-2 – Scope
Applications typically covered • Belt Conveyors • Roller Conveyors • Pumps (no servo-pumps) • Compressors • Fans • ...
Applications typically not covered • Robots • Hoist Drives • Pick-and-Place Machines • Machine Tools • Rack Feeders • ...
IEC 60034-30-2 Energy Efficiency classification of variable speed motors as a component
Image source: Directindustry.de, Pumpenzentrale, Kuka, syskomp
IEC 60034-30-2 – General
IEC 60034-30-2 Energy Efficiency classification of variable speed motors as a component
• Tables IE1, IE2, IE3, IE4 from IEC 60034-30-1 / 50 Hz • New Table IE5 • Test at 100% torque and 90% speed to allow full magnetic flux • Reduction of the nominal efficiency limits (table values)
by an 15% / 25% allowance rHL - due to additional motor losses from converter supply and - due to lower efficiency at 90% test speed
𝜂𝜂n is the new nominal efficiency limit for converter motors acc. to 34-30-2 𝜂𝜂ref is the nominal efficiency limit from the tables (taken from IEC 60034-30-1 / 50 Hz)
IEC 60034-30-2 – IE4 Nominal Efficiency Limits
Nominal efficiency limits for 1201 ... 1800 /min rated speed motors determined at 90% rated speed, 100% rated torque
1201 ... 1800 /min
nom
inal
eff.
lim
it [%
]
IEC 60034-30-2 – IE4 Nominal Efficiency Limits
IE4 Nominal efficiency limits determined at 90% rated speed, 100% rated torque
2 Nm
5 Nm 10 Nm
500 Nm 100 Nm 50 Nm
nom
inal
eff.
lim
it [%
]
speed [1/min]
IEC 60034-2-3 - Interpolation Procedure
Energy Efficiency and Loss Interpolation Formula
Interpolation Formula: 𝑷𝑷𝑳𝑳 𝒏𝒏,𝑻𝑻 = 𝑐𝑐𝐿𝐿𝐿 + 𝑐𝑐𝐿𝐿𝐿 ∙ 𝒏𝒏 + 𝑐𝑐𝐿𝐿𝐿 ∙ 𝒏𝒏𝟐𝟐 + 𝑐𝑐𝐿𝐿𝐿 ∙ 𝒏𝒏 ∙ 𝑻𝑻𝟐𝟐 + 𝑐𝑐𝐿𝐿𝐿 ∙ 𝒏𝒏𝟐𝟐 ∙ 𝑻𝑻𝟐𝟐 + 𝑐𝑐𝐿𝐿𝐿 ∙ 𝑻𝑻 + 𝑐𝑐𝐿𝐿𝐿 ∙ 𝑻𝑻𝟐𝟐
• Same formula for all types of electric machines (synchronous, asynchronous) • Applicable to all speeds in the base speed range (constant torque, constant flux) • Applicable to all torques from no-load to rated torque (plus some overloading) • Several ways to determine the interpolation coefficients cL1, ..., cL7 for manufacturers • Always the same interpolation for customers
To determine losses and efficiency of more complex load profiles, the new edition of IEC 60034-3-2 establishes standardized tests and an interpolation procedure.
Coefficients from 7 Measurements
IEC 60034-2-3 - Interpolation Procedure
Analytical determination of coefficients using 7 simple algebraic formulas:
Coefficients from 16 Measurements
By using a grid of 16 measurement points at 25, 50, 75 and 100% speed and torque, the quality of the interpolation can be assessed.
QISI <= 10 % good QISI <= 20 % acceptable
QISI is the standard deviation of the interpolation errors at 16 load points
25 50 75 90 25
50
75
10
0 Speed
Torq
ue Best-fit Coefficients
• Incorporates all 16 (or more) load-points • The coefficients are determined numerically
(using EXCEL or MATLAB) by a search for the minimum QISI
IEC 60034-2-3 - Interpolation Procedure
IEC Efficiency Classification – The Whole Picture – Overview
Image Source: SEW Eurodrive, KSB
IEC Efficiency Classification – The Whole Picture – Motors
IEC Efficiency Classification – The Whole Picture – Frequency Converters
IEC Efficiency Classification – The Whole Picture – Power Drive Systems
IEC Efficiency Classification – The Whole Picture – Driven Equipment
IEC Efficiency Classification – The Whole Picture – Complete Applications
IEC Motor and Converter Standards – Current Status
Standard Working Group Status
IEC 60034-2-1 IEC TC2 WG 28 (Axel Möhle)
ed 2.0 published (2014-06)
IEC 60034-2-3* ed 2.0 in preparation 2/1841/CD of 2016-07
IEC 60034-30-1 IEC TC2 WG 31
(Martin Doppelbauer)
ed 1.0 published (2014-03)
IEC/TS 60034-30-2 ed 1.0 in preparation 2/1833/DTS accepted
IEC 61800-9-1 IEC SC22G WG18 (Tim Schumann)
ed 1.0 in preparation FDIS awaits French
translation... IEC 61800-9-2
* Ed 1.0 was a technical specification that will now be transformed in a full standard in ed 2.0
Application of Standards and Regulations
EU directives, EU regulations, DOE rules, National Legislation
etc. are legally binding
('it's the law').
Standards (IEC, ISO, EN, NEMA,...) are not legally binding, unless: • they are referred to in a legal text, • the manufacturer references them
in the product documentation, for example by printing ‘IEC 60034’ on the rating plate,
• the customer orders according to a certain standard,
• a manufacturer joins a marketing agreement that refers to certain standards, for example NEMA PREMIUM.
Only the normative parts must be followed when a standard or a series of standards is/are applied. Informative parts, technical specifications and technical reports may be ignored.
New EU regulation (EC) No 347/2016 (WTO G/TBT/N/EU/347)
Martin Doppelbauer
Energy-related products covered by implementing measures under the Ecodesign Directive (2009/125/EC) amending (EC) No 640/2009
Martin Doppelbauer Univ.-Prof. Dr.-Ing. Chairman IEC TC2 Convenor IEC TC2 WG31 Karlsruhe Institute of Technology (KIT) Institute of Electrical Engineering (ETI)
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