A good example of a space-saving axial fan is the D1225R series from Dynetics, which is available in versions for 12 V or 24 V DC voltage.
This axial fan with ball bearings is characterised by an optimised impeller design and a 3-phase BLDC motor with integrated rubber damping and a new driver IC.
This gives the D1225R outstanding features, including a 5 dB lower noise level and an air performance at an installation depth of 25 mm, which is currently only found in fans with an installation depth of 32 mm. The 7 mm saving allows the designer to reduce the drag of the entire unit, increasing the flow rate and improving cooling efficiency.
This newly developed high-efficiency motor in combination with a new customised driver IC resulted in energy savings of around 30 percent in a demo application.

Function overview

The new fan models have a 50 percent wider low-noise operating range. Vibrations are significantly reduced by two design measures, and they require 30 percent less input power than previous models. A new design reduces noise development and sensors can be installed for lock and pulse functions. The fans are suitable for variable speeds, which can be controlled via PWM, voltage or resistance, and offer protection against dust and water – up to IP68.

 D1225R

Dynetics has EC axial fans (EC = Electronically Commuted or Electronically Controlled) in its portfolio because they replace conventional AC fans, which are based on shaded-pole motors with very low efficiency. EC motors have a very high efficiency and maintain this even at low speeds. In most cases, they consume less than a third to a half of the power required by conventional shaded-pole induction motors, resulting in lower operating costs and shorter amortisation times. They run cool and drastically reduce the amount of waste heat generated, which is reflected in significantly lower energy consumption in cooling units, for example.

An EC motor replaces
many induction motor models

Cooler operation also extends the service life of highly stressed motor parts such as windings and bearings. They also have a wider operating range for the power supply than conventional induction motors, meaning that one EC motor can replace several induction motor models. Customers need fewer motor models, which simplifies inventory management. This is the main reason why EC motor product lines typically include fewer motor models than their induction counterparts.

Simple control

In terms of speed control and integrated functions, EC motors allow customers to optimise and integrate the motor, fan and controller with the application, as motor operation is controlled by software, enabling functions such as data communication, constant volume control and variable speed. In addition, EC motors are quieter than traditional inefficient motors, have a longer service life and require less maintenance.
The Dynetics family of EC-type radial, centrifugal and axial fans is available in several sizes and power supplies with various options such as IP-levels and can be customised with different connection cables, plugs and more. All fans have CE-Approvals.

Optimised fan design

Efficient cooling of appliances requires high-quality axial or radial fans that offer either high static pressure or compact, super-quiet multi-blade blowers. As appliances become smaller and smaller, fans need to be both efficient and compact. For cooling electrical and electronic systems, Dynetics offers a range of ball-bearing axial and radial fans. Three new models are listed below.