Debugging item: space radiation

Countermeasure analysis and solution description

1. Add a ferrite core to the DC wire going to battery.

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2. Add cross shield to the main transformer.

    Shield PFC inductor and link it to earth.

    Remove the Y capacitors C64, C65 and C62.

    Later, there is a piece of advice of changing the winding type of main transformer, which is better for its EMI characteristics.

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3. Add a ferrite bead to the middle pin of Q27.

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4. Contact a ferrite bead in series with each side pin of D9.

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5. Parallel a 104 capacitor to C48.

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6. Add a 102 capacitor to the position next to the diode.

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7. Link the earth wires at the original side of power.

    Add a wire jumper at the position of Y capacitor.

    Add two 222/1KV capacitors between the subsidiary winding of transformer and earth.

    Add a 104 capacitor between the output radiating rib of transformer and positive pole.

Testing data

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