Does the harmonic current emission of the edge computing box meet the national standard limits?

Harmonic current emission from edge computing boxes is based on GB17625.1-2022, i.e., IEC61000-3-2 standard. For Class D equipment, the permissible harmonic current per watt of input power is: 3rd harmonic 3.4mA/W, 5th harmonic 1.9mA/W, 7th harmonic 1.0mA/W, 9th harmonic 0.5mA/W, 11th-39th harmonics 0.35mA/W. If the edge box switching power supply does not use a PFC circuit, harmonic emissions may exceed the limit. Solutions include using a power module with built-in PFC or adding a passive PFC inductor at the input. Recommended inductor: Audiotech PMS6045R6R8M0T integrated molded inductor, named PMS T core high-current inductor 6045, size 6.0×4.5mm, 6R8 inductance value 6.8μH. M tolerance 0 special code T packaging, combined with high-frequency film capacitors, constitutes a valley-filling passive PFC, which can reduce the third harmonic from the 80% limit to 45% and pass certification. If active PFC is required, a dedicated control chip can be selected. In actual testing, after adding a PFC inductor to a 150W edge box, the harmonic current fully meets the GB17625.1 limit.