IEC 60404-14:2002 PDF

Overview

IEC 60404-14:2002 is an international standard published by the International Electrotechnical Commission (IEC) that defines the methods for measuring the magnetic dipole moment of ferromagnetic material specimens. Specifically, it covers the withdrawal and rotation methods used to determine the magnetic dipole moment. This standard is applicable to all ferromagnetic materials, with particular emphasis on permanent magnet (magnetically hard) materials and cemented carbide materials containing a ferromagnetic binder.

The document provides a comprehensive framework for the measurement process, including principles, specimen preparation, calibration techniques, and uncertainty considerations. By facilitating precise magnetic dipole moment measurements, this standard supports the quality assurance and development of magnetic materials for technological and industrial applications.

Key Topics

• Scope and Applicability Applicable to all ferromagnetic materials, embracing both hard magnetic materials (permanent magnets) and materials with magnetic binders such as cemented carbides.

• Measurement Methods

  • Withdrawal Method: Measures the variation in magnetic flux when the specimen is moved out of the detection coil.
  • Rotation Method: Measures magnetic flux changes as the specimen is rotated within the coil.

• General Principles Utilizes a detection coil in an open magnetic circuit to measure the magnetic dipole moment. Magnetization can be applied to saturate the specimen, allowing the determination of saturation magnetic dipole moments.

• Calibration Techniques Calibration includes the use of a calibrated permanent magnet sample and mutual inductor methods to ensure measurement accuracy.

• Magnetic Polarization and Saturation From the magnetic dipole moment and specimen volume, the average magnetic polarization J and specific saturation magnetic polarization (σ_s) can be derived.

• Temperature Considerations Measurements are normally made at room temperature but can be performed at different temperatures by controlling the specimen environment within the detection coil.

• Measurement Uncertainty and Reporting The standard discusses methods to evaluate measurement uncertainty and specifies the requirements for reporting test results.

Applications

IEC 60404-14:2002 is essential for:

• Permanent Magnet Quality Control Ensuring the magnetic performance of magnetically hard materials in motors, sensors, and actuators.

• Research and Development of Magnetic Materials Characterizing new ferromagnetic alloys and composites, including cemented carbide materials with magnetic binders.

• Industrial Measurement and Calibration Laboratories Standardizing measurement procedures to maintain consistency across facilities performing magnetic dipole moment assessments.

• Material Certification and Compliance Providing standardized measurement protocols required for material certification in various electrical and magnetic device manufacturing sectors.

• Evaluation of Feebly Magnetic Materials Measuring materials with very low magnetic moments using calibrated coil systems.

Related Standards

• IEC 60404-4 and IEC 60404-5 – For measuring magnetic parameters such as remanence, coercivity, and maximum energy product in closed magnetic circuits.
• IEC 60404-7 – Covers the measurement of coercivity (HcJ) for soft and semi-hard ferromagnetic materials in open circuits.
• IEC 60034-1 – Pertains to rotating electrical machines, often relying on permanent magnets whose properties are measured using IEC 60404 standards.

By aligning with these and other magnetic material standards, IEC 60404-14:2002 ensures comprehensive evaluation and quality control for magnetic materials used in industrial and technological applications.

Keywords: IEC 60404-14, magnetic dipole moment measurement, ferromagnetic materials, permanent magnets, withdrawal method, rotation method, magnetic polarization, saturation magnetic polarization, magnetic dipole moment calibration, ferromagnetic specimen measurement, magnetic material standards.