GB/T 34860-2017 in English

Core technology innovation and standard background

Slotless permanent magnet motors eliminate the traditional core slot structure and adopt a cup winding design to increase torque density and reduce vibration and noise. This standard systematically regulates the three types of permanent magnet motor technology systems: slotless DC, brushless DC and synchronous for the first time.

Key technical parameter system

Typical application scenario analysis

Inspection and certification points

The standard establishes a three-level inspection system:

1. Group A factory inspection: includes 7 basic indicators such as appearance and insulation resistance
2. Group C periodic inspection: environmental tests such as vibration and shock are carried out every two years
3. Identification inspection: new products must pass 30 full-index tests

Key test equipment requirements: dynamometer accuracy ≤0.5%, constant temperature box temperature fluctuation ±1℃.

Implementation suggestions

• During the design phase, the 12-440V voltage level and 6-30000W power sequence recommended by the standard should be given priority.
• During the production process, focus on the radial runout of the shaft extension (0.01-0.05mm) in Article 5.4.
• During acceptance, the two-year quality assurance period shall be implemented in accordance with Article 7.6.