Overview
ISO 21782-1:2023 - Electrically propelled road vehicles - Test specification for electric propulsion components - Part 1 defines the general test conditions and definitions used across the ISO 21782 series. It specifies standardized test procedures and terminology for voltage class B electric propulsion components: motor, inverter, DC/DC converter, and their combinations (the motor system). The standard enables reproducible, comparable performance and operating-load testing for electrically propelled road vehicles.
Key topics and technical requirements
- Scope & terminology: clear definitions for components and test-relevant terms (e.g., chopper, DC/DC converter, conversion rate, efficiency, maximum current/power/torque for specified durations).
- General test conditions:
- Operating points for motor, inverter and motor system (defined in figures and tables). Test durations t include 2 s, 10 s, 1 800 s (30 s or 60 s optional).
- Methods for determining rank during operating-load tests: target rank verification and rank search methods.
- Provision for measurement: requirements for current, voltage and power measurement and measurement accuracy.
- DC input voltage ranges and considerations (aligned with voltage class B definitions and OS1 references).
- Environmental conditions: temperature and humidity control and steady-state (room temperature) starting conditions.
- Abbreviations & references: standardized shorthand (AC, DC, PWM, RT, DUT) and links to ISO/IEC terminology resources.
- Informative annexes: example formulas for power calculation and a bibliography supporting the series.
Practical applications
- Standardized lab test protocols for component performance characterization (efficiency, loss, torque/speed behavior).
- Operating-load and endurance testing to assess durability and thermal limits (e.g., maximum current/power for defined durations).
- Component and system validation during R&D, prototype evaluation, and pre-qualification for production.
- Supplier comparison and procurement specification: enabling fair, reproducible comparisons of motor systems and converters.
- Test-bench and regulatory test program development for electric vehicle (EV) propulsion components.
- Automotive OEMs and EV powertrain engineers
- Motor, inverter and DC/DC converter manufacturers and suppliers
- Independent test laboratories and certification bodies
- R&D teams working on electric propulsion performance and reliability
- Quality assurance and procurement teams evaluating component suppliers
Related standards
- Other parts of the ISO 21782 series (Parts 2–7) - detailed performance and operating-load tests for motor, inverter and DC/DC converter.
- ISO 21498-1 (OS1 voltage definitions) and IEC terminology references (IEC Electropedia, IEC 60050).
Keywords: ISO 21782-1, electric propulsion components, electric vehicle testing, motor system test specification, inverter testing, DC/DC converter, operating load test, EV component standards.
Open preview (PDF)Electrically propelled road vehicles — Test specification for electric propulsion components — Part 1: General test conditions and definitions
