GB/T 8128-2022 in English

Analysis of standard formulation background and technological evolution

The revision of this standard is based on GB/T8128-2008. The main updates include:

• Deleted the "Test Items" and "Test Equipment" chapters
• Added the "Basic Requirements for Tests" and "Test Preparation" sections
• Changed the temperature rise test method (6.5 in GB/T5171.21-2016)
• Using the direct method (A method) for efficiency test
• Added a number of other test items, such as dimensional inspection, maximum torque determination, etc.

Explanation of professional terms and practical application cases

Armature winding resistance measurement: In the temperature rise test, it is necessary to measure directly on the commutator. To avoid interference, it is recommended to lift the brushes or add insulating spacers. For example, when running under rated load, measure the temperature change of the armature winding.

Spark level judgment criteria: The table in Appendix A specifies in detail the performance characteristics of different spark levels and their impact on the commutator and brushes. For example, when a level 1 spark occurs, there is only a small amount of intermittent sparks on the edge of the brush, and there is no obvious black mark on the commutator surface.

Implementation Recommendations

For the implementation of the new version of the standard, it is recommended that relevant companies:

1. Update test equipment and test processes to ensure compliance with the new standard requirements
2. Strengthen technical personnel training, especially the study of new test items
3. Establish a complete test record system to facilitate subsequent quality traceability
4. Regularly calibrate measuring instruments to ensure data accuracy