Quiet fans for effective cooling, or ventilation:

Quiet fans for effective cooling, or ventilation:

Many devices with electronic components are becoming more and more powerful and have ever higher packing densities. Convection cooling is the most common solution, and the cheapest method, using air as a medium to dissipate heat with forced air movement. The often increased heat development of convection cooling requires more powerful fans, which, however, should always be quieter.

In order to meet these requirements, manufacturer Nidec supplies innovative fan blades with consistent vibration reduction of the motor.

Origin of the noise generated in the fan.

Noise is often generated by a combination of different conditions (air flow, commutation from the motor). Nidec Servo’s Measures to eliminate or reduce flow noise are based on extensive analyzes and are technically not a problem.

However, it is difficult to satisfy the users who feel disturbed by the noise emitted by the fans, which can usually be traced back to the fan motor.

This is often triggered by tones up to 1000 Hz. The disruptive frequencies are specifically avoided by the new concept based on the blade-shaped fans and reduction of the resonance noise of the motors used. The fan's brushless DC motor relies on a patented double damping unit, which also prevents the vibrations produced by the fan. The result is a vibration reduction of approx. 66% compared to conventional fans.

Thanks to this the Nidec Servo "Gentle Typhoon" fan is 5 dB quieter than conventional fans and, with an installation depth of 25 mm, offers the same air performance as a conventional 32mm fan.The 7 mm saved allows the designer to reduce the air resistance of the entire device, thus increasing the airflow and improving the cooling efficiency.Thanks to its driver ICs, the new highly efficient brushless motor offers an energy saving potential of approx. 30%. Depending on the customer's requirements, these fans can also be equipped with speed sensors.In the event of problems, they disconnect the system from the network and thus optimize the use of the device and its service life.

Other parameters also play an important role in the optimal selection of suitable fans:

Nidec also supplies centrifugal fans using the same efficient motors with integrated damping.

The available space, size, geometry and air flow are decisive in determining whether axial or centrifugal fans are used optimally.

Website: http://www.dynetics.eu/products/fans-blowers/axial-fans/axial-fans-dc-types/gentle-typhoon/

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