IEC 61800-9-1:2017

Adjustable speed electrical power drive systems - Part 9-1: Ecodesign for power drive systems, motor starters, power electronics and their driven applications - General requirements for setting energy efficiency standards for power driven equipment using the extended product approach (EPA) and semi analytic model (SAM)

IEC 61800-9-1:2017 specifies the general methodology to energy efficiency standardization for any extended product by using the guidance of the extended product approach (EPA).
This document specifies the methodology of determination of losses of the extended product and its sub-parts. It is applicable to motor systems operated by a motor starter or by a converter (power drive systems).

Entraînements électriques de puissance à vitesse variable - Partie 9-1: Écoconception des entraînements électriques de puissance, des démarreurs de moteurs, de l'électronique de puissance et de leurs applications entraînées - Exigences générales pour définir les normes d'efficacité énergétique d'un équipement entraîné via l'approche produit étendu (EPA) et le modèle semi-analytique (SAM)

L'IEC 61800-9-1:2017 spécifie la méthodologie générale relative à la normalisation de l'efficacité énergétique pour tout produit étendu en utilisant les lignes directrices de l'approche produit étendu (EPA).
Le présent document spécifie la méthodologie de détermination des pertes du produit étendu et de ses sous-parties. Il est applicable aux systèmes moteurs entraînés par un démarreur de moteur ou par un convertisseur (entraînements électriques de puissance).

General Information

• Status: Published
• Publication Date: 02-Mar-2017
• ICS: 29.130.01 - Switchgear and controlgear in general
• ICS: 29.160.30 - Motors
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• Technical Committee: SC 22G - Adjustable speed electric power drive systems (PDS)
• Drafting Committee: WG 18 - TC 22/SC 22G/WG 18
• Current Stage: PPUB - Publication issued
• Start Date: 03-Mar-2017
• Completion Date: 10-Mar-2017

Standards Content (Sample)

IEC 61800-9-1 ®
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Adjustable speed electrical power drive systems –
Part 9-1: Ecodesign for power drive systems, motor starters, power electronics
and their driven applications – General requirements for setting energy
efficiency standards for power driven equipment using the extended product
approach (EPA) and semi analytic model (SAM)

Entraînements électriques de puissance à vitesse variable –
Partie 9-1: Écoconception des entraînements électriques de puissance, des
démarreurs de moteurs, de l'électronique de puissance et de leurs applications
entraînées – Exigences générales pour définir les normes d'efficacité
énergétique d'un équipement entraîné via l'approche produit étendu (EPA) et
le modèle semi-analytique (SAM)

IEC 61800-9-1:2017-03 (en-fr)

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IEC 61800-9-1 ®
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Adjustable speed electrical power drive systems –

Part 9-1: Ecodesign for power drive systems, motor starters, power electronics

and their driven applications – General requirements for setting energy

efficiency standards for power driven equipment using the extended product

approach (EPA) and semi analytic model (SAM)

Entraînements électriques de puissance à vitesse variable –

Partie 9-1: Écoconception des entraînements électriques de puissance, des

démarreurs de moteurs, de l'électronique de puissance et de leurs applications

entraînées – Exigences générales pour définir les normes d'efficacité

énergétique d'un équipement entraîné via l'approche produit étendu (EPA) et

le modèle semi-analytique (SAM)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.01; 29.160.30; 29.200 ISBN 978-2-8322-3995-7

– 2 – IEC 61800-9-1:2017  IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and symbols. 9
3.1 Terms and definitions . 9
3.2 Symbols . 10
4 Requirements for the development of energy efficiency standards for extended
products . 12
4.1 General . 12
4.2 Responsibility of the extended product standard or technical committee . 13
4.3 Elements to achieve the extended product approach . 14
5 Requirements for the semi analytic model (SAM) of the extended product . 15
6 Requirements for the semi analytic model (SAM) of the motor system . 16
6.1 General . 16
6.2 Operating points of the PDS . 16
6.3 Requirements if the motor system contains no CDM . 17
7 Merging the semi analytic models (SAMs) to the extended product approach . 17
7.1 General . 17
7.2 Speed versus torque loss points of a motor system . 18
7.3 How to determine intermediate speed versus torque loss points of a motor
system . 19
7.3.1 General . 19
7.3.2 Loss determination by maximum losses of neighboured loss points . 20
7.3.3 Loss determination by two-dimensional interpolation of losses of
neighboured loss points . 20
Annex A (informative) Example how to apply the SAM in the EPA for pump systems
with a required speed versus torque loss points using the PDS . 22
Annex B (informative) Calculation of the energy consumption based on the duty profile . 24
Annex C (informative) Basic torque and power vs. speed profiles, operating points
over time . 25
C.1 General . 25
C.2 Basic torque and power vs. speed profiles . 25
C.3 Operating points over time . 26
C.4 Definition of the operating points over time . 26
C.4.1 General . 26
C.4.2 Calculation of the energy consumption based on the operating points
over time . 27
C.4.3 Example of loss calculation for different operating points over time . 28
Bibliography . 31

Figure 1 – Illustration of core requirements of energy efficiency standardization . 6
Figure 2 – Illustration of the extended product with embedded motor system . 9
Figure 3 – Stakeholders and responsibilities for determination of the energy efficiency
indicator for an extended product . 13
Figure 4 – Illustration of the operating points (shaft speed, torque) for the
determination of relative losses of the power drive system (PDS) . 17

Figure 5 – Speed versus torque relative power loss operating points to determine the
motor starter or switchgear losses . 17
Figure 6 – Responsibilities and workflow to derive the energy efficiency index (EEI) of
an extended product . 18
Figure 7 – Four segments of deviating operating points of a PDS . 19
Figure 8 – Two-dimensional interpolation for deviating operating points . 20
Figure A.1 – Three points of relative losses and shaded area of interest for the pump
manufactures while defining their EEI (energy efficiency index) . 22
Figure A.2 – Example how the SAMs of the PDS and the pump system shall interact to
the resulting efficiency index of a pump system . 23
Figure C.1 – Typical basic torque and power vs. speed profiles . 26
Figure C.2 – Example of operating points over time . 27

Table 1 – Illustration how to combine essential elements of the efficiency contributions . 15
Table C.1 – Operating points over time for the investigated examples . 28
Table C.2 – Losses in the specified operating points for configuration 1 . 28
Table C.3 – Losses in the specified operating points for configuration 2 . 29

– 4 – IEC 61800-9-1:2017  IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS –

Part 9-1: Ecodesign for power drive systems, motor starters,
power electronics and their driven applications –
General requirements for setting energy efficiency
standards for power driven equipment using the extended
product approach (EPA) and semi analytic model (SAM)

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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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
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6) All users should ensure that they have the latest edition of this publication.
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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.
International Standard IEC 61800-9-1 has been prepared by subcommittee 22G: Adjustable
speed electric drive systems incorporating semiconductor power converters, of IEC technical
committee 22: Power electronic systems and equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
22G/348/FDIS 22G/351/RVD
Full information on the voting for the approval of this standard 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.
A list of all parts in the IEC 61800 series, published under the general title Adjustable speed
electrical power drive systems, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 61800-9-1:2017  IEC 2017
INTRODUCTION
IEC SC 22G includes the standardization task force for dealing with energy efficiency of motor
systems. It has close collaboration with several other technical committees (for example,
IEC TC 2, IEC SC 121A).
IEC SC 22G maintains responsibility for all relevant aspects in the field of energy efficiency
and ecodesign requirements for power electronics, switchgear, control gear and power drive
systems and their industrial applications.
The core requirements of energy efficiency standardization are illustrated in Figure 1. The
work has been agreed to provide the reasonable target as a best compromise.
Market surveillable
(independent
certifiable)
Technically
comprehensive
Reasonable target
Manufacturer neutral
(no marketing messages)
IEC
Figure 1 – Illustration of core requirements
of energy efficiency standardization
IEC 61800 (all parts) does not deal with mechanical engineering components.
NOTE Geared motors (motors with directly adapted gearboxes) are treated like power drive systems (converter
plus motor). See IEC 60034-30-1 for classification of the losses of a geared motor. The efficiency classes of
gearboxes as individual components are under consideration.
IEC 61800-9-1 is a subpart of the IEC 61800 series, which has the following structure:
– Part 1: General requirements – Rating specifications for low voltage adjustable speed d.c.
power drive systems
– Part 2: General requirements – Rating specifications for low voltage adjustable speed a.c.
power drive systems
– Part 3: EMC requirements and specific test methods
– Part 4: General requirements – Rating specifications for a.c. power drive systems above
1 000 V a.c. and not exceeding 35 kV
– Part 5: Safety requirements
– Part 6: Guide for determination of types of load duty and corresponding current ratings
– Part 7: Generic interface and use of profiles for power drive systems
– Part 8: Specification of voltage on the power interface
– Part 9: Ecodesign for power drive systems, motor starters, power electronics and their
driven applications
Each part is further subdivided into several subparts, published either as International
Standards or as Technical Specifications or Technical Reports, some of which have already
been published. Other will be published with the part number followed by a dash and a
second number identifying the subdivision (for example, IEC 61800-9-2).
This subpart of IEC 61800-9 is an International Standard for characterizing the energy
efficiency of motor systems when supplied by a motor starter or by a variable
voltage/frequency converter. The goal of this part of IEC 61800-9 is to establish a clear and
simple system for the comparison of the energy performance of motor systems that can help
manufacturers to improve their products, to give users the necessary transparency and
information and to provide a robust reference base for regulators and minimum energy
performance standards.
The IEC 61800-9 series (Ecodesign for power drive systems, motor starters, power
electronics and their driven applications) will consist of the following subparts:
– Part 9-1: General requirements for setting energy efficiency standards for power driven
equipment using the extended product approach (EPA) and semi analytic model (SAM)
– Part 9-2: Energy efficiency indicators for power drive systems and motor starters

– 8 – IEC 61800-9-1:2017  IEC 2017
ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS –

Part 9-1: Ecodesign of power drive systems, motor starters,
power electronics and their driven applications –
General requirements for setting energy efficiency
standards for power driven equipment using the extended
product approach (EPA) and semi analytic model (SAM)

1 Scope
This part of IEC 61800 specifies the general methodology to energy efficiency standardization
for any extended product by using the guidance of the extended product approach (EPA).
It enables product committees for driven equipment connected to motor systems (so called
extended products) to interface with the relative power losses of the connected motor system
(e.g. power drive system) in order to calculate the system energy efficiency for the whole
application.
This is based on specified calculation models for speed/load profiles, the duty profiles and
relative power losses of appropriate torque versus speed operating points.
This document specifies the methodology of determination of losses of the extended product
and its sub-parts.
This document is applicable to motor systems operated by a motor starter or by a converter
(power drive systems).
This document does not specify requirements for environmental impact declarations.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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.
IEC 60050-161, International Electrotechnical Vocabulary – Part 161: Electromagnetic
compatibility
IEC 60034-2-1:2014, Rotating electrical machines – Part 2-1: Standard methods for
determining losses and efficiency from tests (excluding machines for traction vehicles)
IEC TS 60034-2-3, Rotating electrical machines – Part 2-3: Specific test methods for
determining losses and efficiency of converter-fed AC induction motors
IEC 61800-9-2:2016, Adjustable speed electrical power drive systems – Part 9-2: Ecodesign
for power drive systems, motor starters, power electronics and their driven applications –
Energy efficiency indicators for power drive systems and motor starters

3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-161 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
duty profile
load-time profile
3.1.2
energy efficiency index
EEI
value describing the energy efficiency of an application, resulting from the extended product
approach (EPA)
3.1.3
extended product
EP
driven equipment together with its connected motor system (e.g a PDS)
Note 1 to entry: See Figure 2.
Extended product
Motor system
Power drive system (PDS)
Driven equipment
Complete drive module (CDM)
Mains Basic
Trans- Load
Feeding
and drive
Motor
mission machine
section
mains module
cabling (BDM)
Motor starter
(contactor,
softstarter, etc.)
Motor control system = CDM or starter
IEC
Figure 2 – Illustration of the extended product with embedded motor system
3.1.4
extended product approach
EPA
methodology to determine the energy eficiency index (EEI) of the extended product (EP)
using the speed torque profiles of the driven equipment, the relative power losses of the
motor system and the duty profile of the application
Auxiliaries
Auxiliaries
– 10 – IEC 61800-9-1:2017  IEC 2017
3.1.5
load-time profile
fraction of time spent at each operating point during the total operating time or a complete
cycle of operation of the extended product
Note 1 to entry: Typically this profile is represented by a histogram.
Note 2 to entry: The standby mode can be included in the load time profile.
3.1.6
motor control equipment
either a CDM or a motor starter
3.1.7
motor system
motor control equipment and a motor
3.1.8
semi analytic model
SAM
determination model for the losses of a motor system or a driven equipment
Note 1 to entry: SAMs include physical and mathematical parameters and calculation algorithm of the subparts of
an EP. SAMs are necessary to determine the typical relative power losses of the subparts of an EP in order to
determine its overall losses.
3.1.9
transmission
any component (coupling, Gear box, etc.) which connects the motor shaft to the load machine
(e.g. pump): coupling, gearbox
3.2 Symbols
3.2.1
E
Electrical
electrical energy consumption of an application during a certain runtime period
3.2.2
k
P
ratio of the weighted average electrical power consumption P of an application to the
Electrical
reference power consumption P
Reference
3.2.3
P
Electrical
power consumption [kW] of an application over time
3.2.4
P
Electrical Max
power consumption [kW] at 100 % speed and 100 % load
3.2.5
P
i
power consumption [kW] at operating point i
3.2.6
P
L,control
power losses of the control
3.2.7
P
n
nominal power of an equipment which is typical for its population of the same rating (see
IEC 60034-1 for motors)
3.2.8
P
out,CDM
output power of CDM from the power loss measurement
3.2.9
P
out,PDS
output power of PDS from the power loss measurement
3.2.10
P
r
rated power of equipment which is assigned by its manufacturer
3.2.11
P
Reference
power consumption used for reference, defined by the extended product committee
3.2.12
P
L
electrical power losses
Note 1 to entry: In P , P and P , the index CDM refers to the complete drive module, Mot refers to
L,CDM L,Mot L,Aux
the motor, Aux refers to the auxiliary devices like cables, transformers or filters. The relative power losses are the
per unit losses relative to the nominal power of the device.
3.2.13
P
L,CDM
power losses of a CDM
3.2.14
P
L,CDM,determined
power losses of CDM from the power loss determination method
3.2.15
P
L,CDM,relative
power losses of the CDM, with reference to its rated apparent power
3.2.16
P
L,inverter
power losses in the inverter section of a CDM
3.2.17
P
L,PDS,determined
power losses of PDS from the power loss determination method
3.2.18
P
L,Mot
total losses of a motor according to IEC 60034-2-1:2014, method 2-1-1B, when supplied by a
converter (non sinusoidal power supply)
3.2.19
t
W
working time of an equipment
– 12 – IEC 61800-9-1:2017  IEC 2017
3.2.20
T
i
torque [Nm] at operating point i
3.2.21
TF
i
percentage of time (time fraction) an extended product is operated at one specific operating
point i
4 Requirements for the development of energy efficiency standards for
extended products
4.1 General
This document specifies a methodology to determine the energy efficiency index of an
application, based on the concept of semi analytic models (SAM). The methodology shall be
referred to as the extended product approach (EPA).
The responsibilities and tasks of the different stakeholders creating or using these extended
products standards, as well as the data flows in-between, are required.
a) Specific information about the equipment shall be considered:
– The torque versus speed profile of the driven load as specified by the load
manufacturer or other pertinent entity (e.g. regulatory authority, other specified
organization).
– The losses of the Motor System or its constituents (motor, CDM or starter) at reference
part-load operating points. These shall be provided by the different manufacturers as
specified in IEC 61800-9-2.
b) Information about the driven equipment shall be considered:
– The duty profile of the driven equipment. Pertinent entities can for example define
typical applications of their extended products, each associated with a typical duty
profile.
c) Extended product approach shall be used to determine an energy efficiency indicator
(losses, efficiency, energy consumption, etc.):
– IEC 61800-9-2 specifies the methods for the determination of losses of the motor
system using measurement and/or calculations.
– Other pertinent entity(ies) (e.g. regulatory authority, other specified organization) shall
define how to combine the losses of the motor system and the losses of the load, to
obtain an overall energy efficiency index for the extended product within the defined
application.
The interactions between the different stakeholders are shown in Figure 3.

IEC 61800-9-2
Motor manufacturer
For specifying part-load
operating points at which motor
losses are required
Losses at standardized Losses at standardized
operating points operating points
PDS manufacturer
CDM manufacturer
Extended product manufacturer
uses uses
Motor system
characteristics
For determining
motor system losses IEC 61800-9-2 IEC 61800-9-2
Load machine
characteristics
For determining CDM losses
using the test load
General procedure
uses
IEC 61800-9-1
for SAM and EPA
uses
Extended product standard
Extended product
defines standardized applications and
standard committee
writes
EEI evaluation methods
uses
IEC 61800-9-2
EEI of the physical Extended Product
For combining individual
motor and control system
within the standardized applications

IEC
NOTE 1 Motor and CDM manufacturers can provide data directly to the motor system manufacturer.
NOTE 2 If the motor system is based on a starter, then only the motor losses are needed as input to the EPA.
Figure 3 – Stakeholders and responsibilities for determination
of the energy efficiency indicator for an extended product
4.2 Responsibility of the extended product standard or technical committee
Based on the general principles described in this document, it shall be the responsibility of the
entity(ies) dealing with a type of extended product (e.g. regulatory authority, other specified
organization) to specify the semi analytic model of the driven load and of the extended
product for the product-specific application(s).
Other pertinent entity(ies) (e.g. regulatory authority, other specified organization) shall specify
and standardize
– one or more torque versus speed profiles (load profiles) as described in Annex C
considering typical loads,
– one or more duty profiles as described in Annex C considering typical service conditions,
– an appropriate method for determining the losses at intermediate operating points based
on the data from the motor, CDM and PDS (see 7.3),
– a Semi analytic model for the Extended Product considering the extended product
approach (EPA) as described in Clause 7, using the part-load operating points of the
motor system as determined according to IEC 61800-9-2: 2016, Annex E, and
– a method for determining an energy efficiency indicator for the extended product under
their responsibility (see Annex B for example).

– 14 – IEC 61800-9-1:2017  IEC 2017
The extended product standard or technical committee shall apply permissible tolerances for
the part-load losses of the motor system as defined in IEC 61800-9-2.
NOTE The motor system data can consist of PDS data as well as individual data for CDM and motor. IEC 61800-
9-2 provides information about the determination of PDS data based on individual motor and CDM data.
The number of part-load operating points used by the semi analytic model of the extended
product shall be limited to an appropriate choice out of maximum eight points.
4.3 Elements to achieve the extended product approach
The semi analytic model (SAM) model of the extended product allows combining the losses at
the reference operating points to derive the losses at any other operating point. Elements
required for the extended product approach are described in Table 1 and Figure 6.
To determine the overall losses or efficiency of an extended product implemented in an
application, it is required to go through several steps.
Several elements shall be combined.
a) The SAM of the motor system, specified in IEC 61800-9-2, giving its relative losses at
several normalized operating points. The motor system can be a power drive system
(PDS) or can consist of a motor and a motor starter (contactor, softstarter,etc.).
– When the motor system is a PDS, the SAM of the motor system is based on the
concept of reference PDS (RPDS). It is a "typical" PDS to which the physical PDS
under consideration is compared in terms of energy efficiency.
– When the motor system is based on a motor starter, the calculation of the losses is
simpler; there is no need to use any reference motor starter.
b) The SAM of the driven equipment (pump, compressor, fan, etc.), giving the losses or
efficiency of the load machine at typical operation. It is the responsibility of the equipment
manufacturer or the associated product committee.
c) The extended product approach, combining the SAM of the motor system and the SAM
of the driven equipment (and also if necessary efficiency values for the transmission). It is
the responsibility of the manufacturer of the extended product or the associated pertinent
entity. The extended product approach uses application-related data (required operating
points, duty profile, working time, etc.), in order to determine the energy efficiency index of
the application. This index allows comparing the energy efficiency of several motor
systems for a given application, or several modes of operation of a given extended
product.
Table 1 – Illustration how to combine essential elements of the efficiency contributions
Elements
required for the
Input Output Reference Responsibility
Extended Product
Approach
SAM of the motor Characteristics of the Relative losses of the IEC 61800-9-2 IEC SC 22G, TC 2
system motor system motor system at
(physical components, standardized operating
rated powers, etc.) points
SAM of the EP output of the SAM of Relative losses of the EP EP standard Load machine
the motor system and at standardized associated product
characteristics of the operating points committee (e.g.
driven equipment ISO TC 115, TC 117,
(load machine) TC118)
Extended product output of the SAM of Energy efficiency index EP standard Extended product
approach the EP, and of extended product for associated product
requirements about the application committee (e.g.
the application (duty ISO TC 115, TC 117,
profiles, operating TC118)
time, etc.) and
tolerances
5 Requirements for the semi analytic model (SAM) of the extended product
SAMs are necessary to determine the typical relative power losses of the subparts according
to the extended product approach in order to determine its overall losses.
Clause 5 describes the basic requirements which shall be fulfilled while specifying the SAM of
the extended product.
The SAM of the extended product shall include the following aspects:
– average operating (service) conditions to derive the losses of the driven equipment;
– typical torque versus speed profile (operating profile) of the driven equipment;
– typical histogram of required power versus time (the duty profile) of the driven equipment;
– typical tolerance of the loss parameters of the driven equipment;
– the embedded relative losses of the motor system according to the data determined
according to IEC 61800-9-2.
The outcome of the SAM shall be used to calculate the energy efficiency index (EEI) which
shall be able to quantitatively distinct between typical efficient and typical inefficient
applications.
The EEI value shall be given in a metric scheme which allows displaying the value in the
user's documentation or the catalogue.
In order to judge a system concerning energy efficiency, all components of the system have to
be taken into account. Speed regulation by using a power drive system (PDS) is
advantageous in a plurality of cases, but on the other hand it also creates additional losses.
The energy savings that can be achieved are very often depending on the operating point
(OP) at which the extended product is operated as required by the application.
Therefore, it is necessary to have information about the application and its duty, and this
information shall be provided by technical committees determining the SAM for the application
specific extended product.
– 16 – IEC 61800-9-1:2017  IEC 2017
Two application-relative characteristics are particularly useful for describing the extended
product and the way it is operated.
a) The torque or power versus speed profile. This curve describes how the torque
required by a machine depends on its speed. It essentially depends on the type of
machine (motor, pump, fan, etc.).
b) The load-time profile, also called duty profile. This graph describes the various power
levels required by the application, including standby, and the fraction of time during which
the machine is operated at these levels. It essentially depends on the sizing of the motor
and on how the extended product is operated in practice.
These two characteristics can be used as input data to compare potential control solutions in
terms of energy efficiency.
Annex C provides examples of typical torque or power versus speed profiles as well as an
example of operating points over time profile. It also illustrates how to combine both to
determine the weighted electrical power consumed by the application, in order to compare
several motor control architectures in terms of energy savings.
6 Requirements for the semi analytic model (SAM) of the motor system
6.1 General
The SAM of the motor system (e.g. a PDS) shall include all parameters which are necessary
for the determination of the relative power losses for specific different torque versus speed
operating points.
The determination of the EEI of an extended product needs a description of the relative losses
of the motor system in order to justify the most efficient solution.
For further requirements of the SAM of the motors system, see IEC 61800-9-2.
For the SAM of the motor system, the relative losses (specific loss in operation point divided
by nominal power of the motor system) shall be used for specification in order to cover also
cases, where the speed of the extended product is zero.
NOTE This is not aligned with the so called efficiency (η) of line fed motors which is directly given as a
percentage of the mechanical output power to the sum of input electrical power and the power losses.
6.2 Operating points of the PDS
In order to set only a few appropriate measurement points or calculation results to develop
the energy consumption of different extended products, eight points in the torque versus
speed diagram shall be specified (see Figure 4).
These relative losses (containing the relative losses of the motor system), are the output of
the SAM for the motor system and one input of the SAM for the extended product
(see Table 1).
p p p
L, PDS (0; 100) L, PDS (50; 100) L, PDS (100; 100)
p p p
L, PDS (0; 50) L, PDS (50; 50) L, PDS (100; 50)
p p
L, PDS (0; 25) L, PDS (50; 25)
50 100
PDS relative speed (%)
IEC
Figure 4 – Illustration of the operating points (shaft speed, torque)
for the determination of relative losses of the power drive system (PDS)
6.3 Requirements if the motor system contains no CDM
If the motor system contains a motor starter or switchgear the possible operating points are
located at just on one relative speed (100 %). See Figure 5.
The additional power losses of a.c. motor starters according to IEC 60947-4-1 or a bypassed
a.c. semiconductor motor starter according to IEC 60947-4-2 are considered small. The
procedures to determine the relative losses of the motor system containing a motor starter out
of the calculation or measurement are given in IEC 61800-9-2.
In this case, no "reference motor starter" or "reference switchgear" is defined or required.
p
L, MS (100; 100)
p
L, MS (100; 50)
50 100
MS relative speed (%)
IEC
Figure 5 – Speed versus torque relative power loss operating points
to determine the motor starter or switchgear losses
7 Merging the semi analytic models (SAMs) to the extended product approach
7.1 General
Clause 7 describes how the SAMs of a motor system and the extended product shall be
merged together in order to gain the determination for the EEI value according to the
extended product approach.
MS relative torque (
...