ISO 21782-1:2019

Electrically propelled road vehicles — Test specification for electric propulsion components — Part 1: General test conditions and definitions

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 — Partie 1: Conditions generales et définitions

General Information

• Status: Withdrawn
• Publication Date: 28-Aug-2019
• ICS: 43.120 - Electric road vehicles
• Technical Committee: ISO/TC 22/SC 37 - Electrically propelled vehicles
• Drafting Committee: ISO/TC 22/SC 37/WG 4 - Systems and components connected to electric propulsion systems
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 10-Feb-2023

Relations

• Revised: ISO 21782-1:2023 - Electrically propelled road vehicles — Test specification for electric propulsion components — Part 1: General test conditions and definitions
• Effective Date: 06-Jun-2022

Standards Content (Sample)

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

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ISO 21782-1:2019(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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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
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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.
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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.
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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.
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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
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ISO 21782-1:2019(E)

3.5
induction motor
IM
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
0
I
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
0
P
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
n
m
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
0
M
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.
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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
E
0
voltage generated in the armature w
...