1.The core indicators used to measure heat sink performance determine its heat dissipation capacity and suitability. They primarily include:
2.Heat dissipation power (heat dissipation): The maximum amount of heat a heat sink can dissipate per unit time (unit: W or kW). This must be matched to transformer losses and is the core factor in heat sink selection.
3.Heat dissipation coefficient (K value): This indicates the heat sink's heat dissipation capacity per unit temperature difference (oil-air) and per unit area (unit: W/(m²・K)). A higher K value indicates greater heat dissipation efficiency.
4.Thermal resistance: The resistance to heat transfer (unit: K/W). Lower thermal resistance indicates smoother heat transfer. This is typically related to the heat sink's material, structure, and flow field distribution.
5.Pressure drop: The pressure loss during fluid flow on the oil/air side (unit: Pa on the oil side; Pa on the air side). Excessive pressure drop increases oil pump/fan energy consumption, so a balance must be struck between heat dissipation and energy consumption.
