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Smooth Commutation Drive

Next to aerodynamic noise and bearing related noises, the so called "commutation noise" or "switching noise" can play a major role in the noise emission of axial fans with brushless DC motors. At each transition from one stator coil to another, the rotor receives a sudden torque pulse when the next coil switches on. Each of these torque pulses causes a minute deformation of the whole fan structure. Depending on rpm, torque and the material of the fan, this can result in noticeable noises.

Noctua's Smooth Commutation Drive system provides more continuous switching in order to achieve a smoother transition between the stator coils and thereby significantly contributes to the fan's overall quietness. The second generation of this technology (SCD2) further improves running smoothness and reduces minute noises in close proximity to the motor.


Noctua
23.08.2014 - RealHardTechX.com NA-SRC7
Test verdict: "En definitiva, el set de adaptadores NA-SRC7 es un excelente complemento de la serie redux, que también puede usarse conjuntamente con otros muchos ventiladores de 3 y 4 pines y que desde RealHardTechX animamos a utilizar a los fanáticos del silencio, que nos consta que sois muchos. Recomendado." ((José Romero, RealHardTechX.com)
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21.08.2014 - Overclockers.ru NH-D15
Test verdict: "Да, предыдущая версия NF-D14 до сих пор выглядит неплохо, но уже устарела и уступает новинке, так что если вам нравился D14, то и D15 обязательно понравится." (Антон Александрович, Overclockers.ru)
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21.08.2014 - kingdomgame NH-D15
Test verdict: "Noctua è leader nella dissipazione per processori e si vede! Con la sua nuova punta di diamante è riuscita a portare avanti la reputazione che l'NH-D14 si era conquistata meritatamente!" (Andrea Megna, kingdomgame.it)
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20.08.2014 - hwmind.it NF-F12 industrialPPC-2000 PWM
Test verdict: "I prodotti Noctua da sempre sono sinonimo di eleganza, resistenza e qualità, ed attraverso questo esame non possiamo far altro che riconfermare." (La Scuola Salvatore, hwmind.it)
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