Technical Blog -- Cooling Guides & Application Notes | Herays
Technical Blog

Technical Resources & Industry Insights

Explore technical guides, application notes, product selection tutorials, and industry news for industrial cooling solutions.

Technician holding a disassembled DC axial fan with the rotor removed, showing the bearing housing and stator assembly on a workshop bench
DC Axial Fan

What Actually Makes a DC Cooling Fan Quiet — and What Doesn’t?

Fans that look identical on a spec sheet can sound completely different in use, and the difference isn't random. Noise is engineered -- or it isn't. DC fan acoustic performance is determined by four overlapping factors: blade aerodynamic design (which drives tonal noise), bearing type (which drives broadband noise floor), rotational speed (which scales both), […]

Liang · · 16 min read
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An IP-rated DC axial fan mounted in the ventilation housing of an outdoor EV charging station
DC Axial Fan

DC Axial Fans for EV Charging Stations: Cooling Infrastructure That Can’t Go Down

A charging station that overheats and derates doesn't just annoy the driver waiting for a full charge -- it becomes a visible, public failure of infrastructure that's supposed to just work, every time, in a parking lot with nobody watching. DC axial fans for EV charging infrastructure need to handle high-power, continuous-duty operation, real outdoor […]

Liang · · 10 min read
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