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Electric Motor End-of-Line Quality Test - Eccentricity

  • Test Object:

    BLDC Motors

  • Application Scenario:

    End-of-Line Quality Test

  • Challenges:

    • On top of high speed fluctuations, no motor speed signal could be obtained from the test object.
    • Scratching, beeping, clattering noises are masked by louder sounds, making it difficult to pick up by ear.
    • Sound level meters and spectrum analyzers are also ineffective in this case.
    • Additionally, the production pace is fast. Inline quality tests would have to be instantaneous to match.

  • Method of Evaluation:

    • The motor speed is obtained in real-time using automatic speed recognition algorithm.
    • The system utilizes a smart denoising technology to extract pertinent abnormal features and to learn from them, thereby effectively identifying and intercepting faulty motors (Figure 2 and Figure 3).
    • Real-time detection is achieved through optimized edge computing.
Figure 1: Real-time inspection of a BLDC motor
Figure 1: Real-time inspection of a BLDC motor
Figure 2: Successful identification of bearing defects by SigMA
Figure 2: Successful identification of bearing defects by SigMA
Figure 3: Identification of an abnormal clattering sound (highlighted in orange)
Figure 3: Identification of an abnormal clattering sound (highlighted in orange)

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Synovate provides reliability, quality and health test solutions based on machine hearing technology for product whole lifecycle management