Overview
ISO/TS 19466:2017 - Electrically propelled mopeds and motorcycles - Test method for evaluating performance of regenerative braking systems - defines standardized test procedures to quantify how regenerative braking affects electric mopeds and motorcycles. The specification addresses two complementary performance perspectives: vehicle-level benefits (how regenerative braking extends range or reduces energy consumption) and traction motor-system performance (efficiency of the motor/inverter when operating as a generator).
Key topics and technical requirements
- Two measurement perspectives
- Reference range gain: Procedure to determine change in vehicle range with regenerative braking ON vs OFF using the ISO 13064-1 test sequences.
- Reference energy consumption gain: Measurement of mains energy required to recharge after specified sequences, comparing ON vs OFF regenerative braking.
- Regenerative braking efficiency of traction motor system
- Tests at steady-state (fixed speed and torque) and transient conditions (time-varying speed/torque).
- Mechanical coupling of a test motor system and a controllable load motor system to simulate road load and braking torque.
- Required test equipment and accuracies
- Load motor/system able to exceed test motor speeds/torques by ~1.2×.
- Torque sensor accuracy: ±0.2% of maximum; speed sensor: ±0.1% (per IEC 60034-2-1).
- Power analyser accuracy: ±0.2% of maximum.
- Voltage/current sensors: minimum 3 kHz bandwidth and ±0.3% accuracy.
- DC power supply: bidirectional (allowing energy absorption for regen) with capacity ≥ 1.5× input power to test motor; measurement accuracy within ±5%.
- Temperature control (temperature chamber) and winding temperature measurement accuracy ±1 °C.
- Test sequencing
- Vehicle-level tests reference ISO 13064-1 driving sequences (moped and motorcycle annexes).
- Procedures include battery state-of-charge guidance (SOC 75–90% when using vehicle battery) and steps for charging and energy measurement.
- Documentation
- Informative Annex A provides a recommended test report structure.
Applications and users
- Who uses ISO/TS 19466:2017:
- Electric motorcycle and moped OEMs validating regen strategies and claiming range improvements.
- Motor and inverter manufacturers measuring regenerative efficiency.
- Independent test laboratories performing repeatable, comparable evaluations.
- Regulators and certification bodies assessing energy-consumption claims.
- R&D and academic researchers studying control strategies, battery effects, and thermal impacts.
- Practical uses:
- Quantify range extension and energy savings attributable to regenerative braking.
- Benchmark and optimize motor/inverter efficiency in generator mode.
- Validate control algorithms, battery charge management, and component sizing.
Related standards
Keywords: ISO/TS 19466:2017, regenerative braking, electric motorcycles, electric mopeds, regenerative braking efficiency, reference range gain, energy consumption gain, traction motor system, test method.