IEC TS 63573:2026

Overview

IEC TS 63573:2026 provides technical requirements for electrical sheet metal and strip metal used in the stator and rotor cores of rotating electrical machines, as defined by the IEC 60034 series. This technical specification is intended for suppliers of raw electrical sheet, producers of magnetic cores, electric motor manufacturers, and users of electrical steel. It operates in addition to the IEC 60404 series, addressing immediate industry needs for clear, harmonized material specifications for high-efficiency rotating electrical machines.

The objective of IEC TS 63573 is to bridge current gaps until anticipated updates to IEC 60404-8-4:2022 through Amendment 2, setting a well-defined, product-specific standard for non-grain-oriented electrical steel and related components, which plays a crucial role in achieving high IEC efficiency classes in electric motors.

Key Topics

• Material Specifications: Defines requirements for electrical sheet and strip metal, including quality, surface finish, permissible tolerances, and physical properties relevant to electric machine performance.
• Magnetic and Mechanical Properties: Outlines the key characteristics such as specific total losses, magnetic field strength, and the mechanical attributes necessary for reliable core construction.
• Order and Delivery Guidelines: Specifies the critical information to be included in supply agreements, such as product designation, dimensions, test certifications, insulation details, and CO₂ emission data.
• Core Manufacture and Processing: Details the designation codes for different types (standard, high permeability, high strength, high frequency), core stacking methods, grain size evaluation, and special considerations for handling, such as annealing processes and radioactive contamination limits.
• Testing and Certification: Describes methods for assessing electromagnetic and mechanical properties, including accepted test procedures and requirements for factory certificates.
• Tolerances and Deviations: Provides details on permissible deviations in terms of thickness, width, length, shape, residual stress, and wave factor, ensuring fit-for-purpose materials for rotating machines.

Applications

IEC TS 63573:2026 is fundamental for:

• Electric Motor Manufacturers: Ensures access to standardized requirements for raw materials and magnetic cores, supporting the production of high-performance, energy-efficient electric motors.
• Electrical Steel Producers: Offers transparent, harmonized criteria for product quality and conformance, simplifying supplier-customer relationships and streamlining procurement processes.
• Material Suppliers and Core Fabricators: Guides the preparation and delivery of electrical sheets and magnetic cores suitable for use in modern, high-efficiency rotating electrical machines.
• Quality Assurance and Testing Laboratories: Provides standard methods for the evaluation of material and core properties to meet IEC performance and reliability expectations.

With clear definitions, measurement methods, and certification requirements, the document ensures consistency across suppliers and end-users, critical for efficient machine design, manufacture, and operation.

Related Standards

• IEC 60034 series: Rotating electrical machines - Governs general requirements and testing for rotating machinery.
• IEC 60404-1-1: Surface insulations of electrical steel sheet, strip, and laminations - Critical for insulation quality on magnetic materials.
• IEC 60404-8-4: Specification for cold-rolled non-oriented electrical steel in the fully processed state - Closely linked, with IEC TS 63573 supplementing until future amendments are adopted.
• IEC 60404-9: Methods for determining geometric characteristics for electrical steel - Referenced for defining permissible shape deviations.
• IEC Electropedia: International database of electrotechnical terminology supports clarity and shared understanding.

Practical Value

This technical specification helps the electrical machinery industry meet growing demands for high efficiency, consistent performance, and reliable supply chains. By establishing standardized material requirements and clear communication protocols, IEC TS 63573 fosters global harmonization, simplifies procurement, and enhances the performance of rotating electrical machines in various industrial applications.

Keywords: IEC TS 63573, electrical sheet metal, rotating electrical machines, stator core, rotor core, IEC 60034, magnetic core, electrical steel, technical requirements, efficiency class, IEC 60404, core fabrication, electric motor material, international standards.