IEC TS 60349-3-2010 PDF

Full title and description

Electric traction - Rotating electrical machines for rail and road vehicles - Part 3: Determination of the total losses of converter-fed alternating current motors by summation of the component losses. This IEC Technical Specification defines a procedure to determine total losses for converter‑fed AC traction motors by summing individually determined component losses when direct measurement at the fundamental frequency is not practical.

Abstract

IEC/TS 60349-3:2010 applies to rotating machines that comply with IEC 60349-2 (electronic converter‑fed AC motors). Because losses delivered at the fundamental frequency cannot always be measured directly for converter‑fed motors, the document defines how to derive those losses from measurements such as the fundamental-frequency load current and the fundamental-frequency no‑load power input and how to sum component losses to obtain total losses. The 2010 edition includes corrections to formulas in clause 3.2.1.2 and to Table A.2 compared with the previous edition.

General information

• Status: Published (Technical Specification; active edition published 2010).
• Publication date: 25 March 2010.
• Publisher: International Electrotechnical Commission (IEC), Technical Committee TC 9 (Electrical equipment and systems for railways).
• ICS / categories: 45.060.01 (Railway rolling stock in general).
• Edition / version: Edition 2.0 (IEC/TS 60349-3 Ed.2.0).
• Number of pages: 33 pages (bilingual English/French).

Scope

This Technical Specification applies to converter‑fed alternating current traction motors covered by IEC 60349-2. It specifies methods to determine total machine losses by summation of component losses when direct measurement of losses at the fundamental frequency is not feasible, and provides formulae, measurement procedures and explanatory annex material to support loss determination and comparison. The document is informational for test engineers, designers and validators working with traction motors and their associated converters.

Key topics and requirements

• Methodology for determination of total losses of converter‑fed AC motors by summation of component losses.
• Measurement guidance using fundamental‑frequency load current and fundamental‑frequency no‑load power input to derive supplied losses at the fundamental frequency.
• Definitions and classification of component losses relevant to traction motors (e.g., electrical, magnetic, mechanical, stray losses) and instructions on how to separate and measure them.
• Corrections and clarifications to formulas (notably in clause 3.2.1.2) and to Table A.2 compared with the previous edition.
• Normative and informative annexes to support practical measurement and calculation steps.

Typical use and users

Primary users are traction motor designers, test laboratories, vehicle manufacturers, railway equipment suppliers, and conformity/approval bodies who need a repeatable method to determine or verify total losses of converter‑fed AC traction motors. It is also used by researchers and consultants involved in motor performance assessment and energy-efficiency studies for rail and road traction applications.

Related standards

Part of the IEC 60349 series for electric traction rotating machines. Closely related documents include IEC 60349-2 (requirements and tests for electronic converter‑fed alternating current motors) and IEC 60349-1 (machines other than converter‑fed AC motors). General rotating-machine guidance such as IEC 60034 series may also be relevant for additional test and measurement methods.

Keywords

electric traction; traction motor; converter‑fed AC motor; total losses; component losses; loss summation; measurement; no‑load power; fundamental frequency; IEC 60349; TC 9; rail vehicles.

FAQ

Q: What is this standard?

A: IEC/TS 60349-3:2010 is a Technical Specification from IEC (TC 9) that gives a method for determining the total losses of converter‑fed alternating‑current traction motors by summing individually evaluated component losses when direct measurement at the fundamental frequency is not practical.

Q: What does it cover?

A: It covers measurement and calculation methods to derive losses supplied at the fundamental frequency from measurable quantities (for example, fundamental‑frequency load current and no‑load power input), definitions of component losses, and procedural guidance and formulae needed to sum component losses into a total loss figure. It applies specifically to machines that comply with IEC 60349-2.

Q: Who typically uses it?

A: Motor designers, test houses, railway and vehicle manufacturers, motor suppliers, and certification bodies use it when characterising or verifying the loss performance of converter‑fed AC traction motors. Researchers and consultants in traction energy efficiency also use it as a reference method.

Q: Is it current or superseded?

A: The edition in question is IEC/TS 60349-3:2010 (Ed. 2.0), published 25 March 2010. It is published as a Technical Specification and was released as the current edition in 2010; users should check the IEC webstore or their national standards body for any later revisions or national adoptions beyond the 2010 edition. The IEC publication record lists this edition with a stability indication (through 2030).

Q: Is it part of a series?

A: Yes — it is Part 3 of the IEC 60349 series for rotating electrical machines for rail and road vehicles; other parts include IEC 60349-1 and IEC 60349-2 which deal with non‑converter‑fed machines and converter‑fed AC motors respectively.

Q: What are the key keywords?

A: Key keywords are: converter‑fed AC motor, traction motor, losses, component losses, summation, measurement, no‑load power, IEC 60349, electric traction.