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موارد شرکت در باره Assistance Test Case – Juicer Power Disturbance (EN 55014)

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Assistance Test Case – Juicer Power Disturbance (EN 55014)

2026-05-09


Product: Juicer

Standard: EN 55014

Test Item: Power Disturbance

Mode: ON mode (1st gear)

Power: AC

Engineer: Wang

  1. Initial Configuration
    • Motor wire: Ferrite core V180193T, wound 1 turn
    • Power supply wire: Ferrite core V180209T, wound 4 turns
    • Cooling fan: Magnetic ring V180184T, wound 1 turn
    • Result: Pass with 4 dB margin**
  2. Verification 1 – Remove cooling fan magnetic ring
    • Operation: Remove V180184T from cooling fan
    • Phenomenon: Waveform increased at 100–200 MHz
    • Result: Pass (margin still above 4 dB)
  3. Verification 2 – Remove power cord ferrite core
    • Operation: Remove V180209T from power cord; keep V180193T only
    • Result: Test failed (insufficient margin)
  4. Conclusion

    Two ferrite cores are required to pass EN 55014 power disturbance test:

    • V180193T on motor wire (1 turn)
    • V180209T on power supply wire (4 turns)

    Removing either ferrite core causes insufficient margin and test failure.

  5. Recommended EMC Fix
    • Motor wire: add V180193T (1 turn)
    • Power cord: add V180209T (4 turns)