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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)