IEC 61800-9-2:2023

Overview

IEC 61800-9-2:2023 - "Adjustable speed electrical power drive systems (PDS) - Part 9‑2: Ecodesign for motor systems - Energy efficiency determination and classification" defines a harmonized framework to evaluate, classify and report the energy performance of power electronics used with motor-driven equipment. The standard covers complete drive modules (CDM), sub‑drive input/output modules (SDIM / SDOM), power drive systems (PDS) and motor starters. It specifies energy-efficiency indicators, IE/IES classes and test and calculation procedures for determining overall motor‑system losses and class limits.

Key Topics and Requirements

• Energy efficiency indicators and classes: Defines IE classes for motors and IES classes for full PDS, with limit values and consistency rules for classification.
• Loss determination methods: Provides procedures to determine losses by calculation (semi‑analytical and mathematical models) and by measurement (input‑output and calorimetric methods).
• Reference devices and workflows: Uses reference CDM (RCDM) and reference motor (RM) concepts and gives a workflow to combine PDS losses with driven equipment (Semi‑Analytical Model).
• Mathematical models and annexes: Includes a detailed mathematical model for CDM losses (Annex C), converter topologies (Annex D), and motor loss interpolation methods (Annex E).
• Correction and interpolation: Defines correction factors for modified CDM functionality, interpolation of motor losses and coefficients determination for various motor connections.
• Test procedures and documentation: Clause 7 covers type testing and measurement instrumentation; Clause 8 requires user documentation for selection, classification and part‑load/regenerative behaviour.
• Updated edition changes: Adds IES classes up to IES5; removes reference motor loss data (now referencing IEC 60034‑30‑2); expands CDM factors and updates multiple annexes for clearer models and interpolation methods.

Practical Applications

• Selection and design of energy‑efficient drive systems for industrial pumps, fans, conveyors and HVAC.
• Product development and certification for drive manufacturers and module suppliers (CDM, SDIM, SDOM).
• Energy audits, lifecycle assessments and ecodesign compliance checks by systems integrators and energy consultants.
• Test laboratories and compliance bodies performing type tests, measurements and issuing IES/IE classifications.
• Procurement teams using standardized efficiency classes to compare drive system performance.

Who Should Use This Standard

• Drive and motor manufacturers
• System integrators and OEMs using adjustable speed drives
• Test labs and certification bodies
• Energy auditors and sustainability engineers
• Regulators and procurement specialists specifying ecodesign or energy performance requirements

Related Standards

• IEC 60034‑30‑2 (referenced for motor loss data)
• Other parts of the IEC 61800 series covering functional and safety aspects of adjustable speed drives

Keywords: IEC 61800-9-2, ecodesign, energy efficiency determination and classification, power drive systems, CDM, SDM, IES classes, motor losses, drive system testing.