Electrically propelled road vehicles -- Test specification for electric propulsion components

This document specifies the test procedures for performance and operating load for voltage class B electric propulsion components (motor, inverter, DC/DC converter) and their combinations (motor system) of electrically propelled road vehicles. This document specifies the terms and definitions used in the ISO 21782 series and general test conditions.

Véhicules routiers à propulsion électrique Spécification d'essai pour les composants de propulsion électrique

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Status
Published
Publication Date
28-Aug-2019
Current Stage
6060 - International Standard published
Start Date
29-Aug-2019
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ISO 21782-1:2019 - Electrically propelled road vehicles -- Test specification for electric propulsion components
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INTERNATIONAL ISO
STANDARD 21782-1
First edition
2019-08
Electrically propelled road vehicles —
Test specification for electric
propulsion components —
Part 1:
General test conditions and
definitions
Reference number
ISO 21782-1:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 21782-1:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

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Published in Switzerland
ii © ISO 2019 – All rights reserved
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ISO 21782-1:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Abbreviated terms .............................................................................................................................................................................................. 3

5 General test conditions .................................................................................................................................................................................. 4

5.1 Operating points .................................................................................................................................................................................... 4

5.2 Provision for current, voltage and power measurement ................................................................................... 7

5.3 DC input voltage ..................................................................................................................................................................................... 9

5.4 Temperature and humidity .......................................................................................................................................................... 9

5.5 Measurement accuracy .................................................................................................................................................................... 9

Annex A (informative) Formula of power .....................................................................................................................................................10

Bibliography .............................................................................................................................................................................................................................14

© ISO 2019 – All rights reserved iii
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ISO 21782-1:2019(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 37,

Electrically propelled vehicles.
A list of all parts in the ISO 21782 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
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ISO 21782-1:2019(E)
Introduction

Until now, there was no international standardized test procedure for the motor system including

motors, inverters DC/DC converters and their combinations for electric propulsion systems of

electrically propelled road vehicles available. There are some International Standards for industrial use

which consider the steady/constant running of motors and inverters but don't consider the dynamic

operation (acceleration/deceleration).

The ISO 21782 series was prepared aiming at the reproducibility of test results which will enable to

compare and evaluate fairly the performance and reliability of electric propulsion system components

such as the motor system (the motor, inverter, DC/DC converter and their combinations).

The overview of the ISO 21782 series is in Tables 1 to 4 shown below.
Table 1 — Contents of Part 1: general test conditions and definitions
Item of Part 1 Description
Introduction Background and purpose of the ISO 21782 series
Terms and definitions Terms to use in the ISO 21782 series
Abbreviated terms Abbreviated terms to use in the ISO 21782 series
Definition of general condition;
— Operating point
— Current, voltage and power
General test conditions
— DC input voltage
— Temperature and humidity
— Measurement accuracy
Table 2 — Contents of Part 2: performance testing of the motor system
Motor
Item of Part 2 Description Motor Inverter Chopper
system
This test measures total loss and total
Measurement of total efficiency between the input power of
5.1
loss and total efficiency inverter and the output power of the
motor.
This test investigates the temperature
Temperature rise test rise characteristics of each part of the 5.2
motor system within the specified range.
This test measures the torque
Torque characteristic
characteristics specified in the 5.3
test
specifications of the motor system.
This test measures the torque ripple of
Torque ripple test 5.4
the motor.
Table 3 — Contents of Part 3: performance testing of the motor and the inverter
Motor
Item of Part 3 Description Motor Inverter Chopper
system
This test measures loss and efficiency
between the input power and the out- 5.1.1 5.2.1 5.3.1
put power.
Measurement of loss
and efficiency
This test measures conversion rate
between the input power and the out- 5.2.1 5.3.1
put power.
© ISO 2019 – All rights reserved v
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ISO 21782-1:2019(E)
Table 3 (continued)
Motor
Item of Part 3 Description Motor Inverter Chopper
system
This test investigates the temperature
rise characteristics of each part of
Temperature rise test 5.1.2 5.2.2 5.3.2
the component within the specified
range.
This test measures the torque
Torque characteristic
characteristics specified in the 5.1.3
test
specifications of the motor.
This test measures the cogging torque
Cogging torque test 5.1.4
of the permanent magnetic motor.

Table 4 — Contents of Part 6: operating load testing of the motor and the inverter

Motor
Item of Part 6 Description Motor Inverter Chopper
system
Cyclic test of high
4.1.1
acceleration/deceleration endurance
Operation endurance
Cyclic test of torque pattern endurance
tests of motor 4.1.2
including maximum torque
Over speed test 4.1.3
Operation endurance Cyclic test of output current pattern
4.2.1
tests of inverter endurance including maximum current
Contents of this test are mainly spin
Breakdown strength
test, data acquisition of mechanical 4.3.1
verification test
strength of the motor.
vi © ISO 2019 – All rights reserved
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INTERNATIONAL STANDARD ISO 21782-1:2019(E)
Electrically propelled road vehicles — Test specification
for electric propulsion components —
Part 1:
General test conditions and definitions
1 Scope

This document specifies the test procedures for performance and operating load for voltage class B

electric propulsion components (motor, inverter, DC/DC converter) and their combinations (motor

system) of electrically propelled road vehicles.

This document specifies the terms and definitions used in the ISO 21782 series and general test

conditions.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at http: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
chopper

DC electronic power converter (3.18) without an intermediate AC link giving a variable output voltage

by varying the periods of conduction and non-conduction in an adjustable ratio

[SOURCE: IEC 60050-811:2017, 811-19-11, modified — The phrase "electronic power DC convertor" was

modified to DC electronic power converter.]
3.2
conversion rate
ratio of output base wave power or output DC power to input DC power
3.3
DC link inductor

component boosted by the chopper (3.1) circuit, a magnetic energy storage and released in response to

actuation of the switching element
3.4
efficiency
ratio of output power to input power
© ISO 2019 – All rights reserved 1
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ISO 21782-1:2019(E)
3.5
induction motor

AC electric motor in which the electric rotor current needed to produce torque is obtained by

electromagnetic induction from the magnetic field of the stator winding
EXAMPLE Asynchronous motor.
3.6
inverter

electric energy converter that changes direct electric current to single-phase or polyphase alternating

currents
[SOURCE: IEC 60050-151:2001, 151-13-46]
3.7
maximum current for duration of t
t=t0

maximum current defined for the time frame t which can be constantly achieved for t seconds starting

0 0

from the steady state condition of room temperature (RT) and the nominal cooling conditions until the

inverter (3.6), chopper (3.1) reaches the defined maximum temperature limit
3.8
maximum operating speed
upper limit revolution speed for the torque-motor speed characteristics
3.9
maximum power for duration of t
t=t0

maximum power defined for the time frame t which can be constantly achieved for t seconds starting

0 0

from the steady state condition of RT and the nominal cooling conditions until the motor, inverter (3.6)

and chopper (3.1) reaches the defined maximum temperature limit
3.10
maximum speed
highest defined speed which can maintain maximum power

Note 1 to entry: Maximum speed can be limited by control software or supplier's definitions.

3.11
motor system

electric propulsion system for electrically propelled road vehicle comprising a combination of

components such as motor, inverter (3.6) and if necessary, DC/DC converter
3.12
maximum torque for duration of t
t=t0

highest torque defined for the time frame t which can be constantly achieved for t seconds until the

0 0

power limitation at higher speed starting from the steady state condition of RT and the nominal cooling

conditions until the motor reaches the defined maximum temperature limit
3.13
maximum voltage for unlimited operating capability
highest value of OS1
Note 1 to entry: See ISO/PAS 19295 about OS1.
2 © ISO 2019 – All rights reserved
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ISO 21782-1:2019(E)
3.14
minimum voltage for unlimited operating capability
lowest value of OS1
Note 1 to entry: See ISO/PAS 19295 about OS1.
3.15
no-load induced electromotive force
voltage generated in the armature w
...

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