Electric Motor End-of-Line Quality Test -Eccentricity

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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 2: Successful identification of bearing defects by SigMA

Figure 3: Identification of an abnormal clattering sound (highlighted in orange)