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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
26.08.2015 - FunkyKit.com NH-D15S
Test verdict: "The price point is high but you do receive the best cooling money can buy!" (Chris McCart, FunkyKit.com)
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25.08.2015 - Insomnia.gr NH-D15S
Test verdict: "Κάπου εδώ κλείνει ακόμη μια παρουσίαση και η Noctua NH-D15S κατεβαίνει από τον πάγκο δοκιμών έχοντας αφήσει στον γράφοντα ιδιαίτερα θετικές εντυπώσεις. Με την ψύκτρα αυτή, η εταιρεία δείχνει για μια ακόμη φορά την σταθερή προσήλωσή της στην προσφορά ποιοτικών προϊόντων, τα οποία έχουν όλα εκείνα τα σημαντικά χαρακτηριστικά τα οποία θα μπορούσε να ζητήσει ακόμη και ο πιο απαιτητικός χρήστης." (Ζαννής Σκουλάξινος, Insomnia.gr)
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24.08.2015 - Donanimhaber Forum NH-D15S
Test verdict: "Uzun lafın kısası yüksek inşa kalitesine sahip,kaliteli fanlar ve termal macunla beraber gelen,sessiz,performans olarak üst düzey bir soğutucu arıyorsanız ve fiyatın sizin için pek bir önemi yoksa NH-D15 i gönül rahatlığıyla önerebilirim. Soğutucunun ram hizasına gelen yerlerde soğutucu bloğun kırpılması da onu rakiplerinden olumlu yönde ayıran bir özellik. Zira bu soğutucuyu alacak kişinin yüksek profilli ram kullanma ihtimali oldukça yüksek." (Ali Emre Alıcı, Donanimhaber Forum)
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