Axial Fans

High-performance induction (AC) motors and energy efficient electronically commuted (EC) motors are key elements of axial fans. The design of AC as well as EC motors is based on a mechanical structure with an external rotor.

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The construction allows for the maximum compactness of fans, excellent motor cooling, low noise levels and high energy efficiency.

The fans are designed and produced in line with clients’ specific requirements and comply with all provisions of current regulations and directives concerning the environmental design of fans (ErP).

The new generation of EC axial fans combines top-level design with advanced operating functions. The excellent design was also awarded with the international industrial design prize, the Red Dot Award for Product Design.

Technologies

We direct major investments into key technologies to ensure energy efficiency, robustness and especially the consistent qualities of the fans. Automated assembly lines play an important role here and are a prerequisite for providing traceable process control.

Modern technologies of winding, forming and impregnating stator windings ensure the fans’ long life. And the technologies of the final assembly of fans and the mechanical balancing of the rotor stack with the propeller of the fan give excellent vibro-acoustic characteristics.

All key machining operations on components and sub-assemblies of fans and all automated processes of the assembly of finished fans are quality-controlled. In the case of the most complex EC fans with integrated electronic drives, the process parameters together with the testing parameters and fan electronic settings are recorded in a unified database. Using the 2D code of the label of each fan allows us to access all of the specific parameters of its settings and measured process values.

If a client specially wishes, the fan’s appropriateness can also be confirmed by measurements of the aerodynamic and vibro-sound characteristics and its functionality by testing its thermal sustainability.

Areas of product application

Axial fans are used in the most complex energy efficient heating, ventilation, air conditioning and cooling systems. With its competencies in planning, sample production and lab testing, the application development team ensures a quick response and the adapted construction and functioning of axial fans in line with clients’ needs or specifications. The pre-development team with its competencies in numeric simulations of CAD and CFD can provide innovative solutions in the event of new application and complex ventilation products.

Products

EC Axial Fans

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EC axial fans are high-tech robust products. Due to their design based on the permanent-magnet construction of the EC motor with an integrated electronic controller they are energy-efficient and, in combination with the special fan blade geometries, they generate very little sound. Their low noise emissions make them suitable for industrial and residential environments.

Various EC motors can drive fans with diameters ranging from 300 mm to 800 mm. The fan blades are made of sheet metal or composite materials (PA or PP) with added glass fibres.

The attached electronic drives of EC fans ensure a soft start, regulate the desired speed, and provide for the seamless acceleration and deceleration of propellers. For this purpose, each electronic drive has a control I/O circuit through which it receives operation requests and returns information from the fan status diagnostic (temperatures of key components, status of recognised faults of the supply network, other operating faults) through the MODBUS RTU digital serial communication. In the case of less complex devices, the simpler analogue control input can be used to set the EC fan’s speed and an alarm signal contact to detect faults in the operation.

Areas of product application

EC axial fans may be used in various end applications for cooling, freezing, air conditioning, heating and ventilation.

They may be used in condensation and evaporation units, heat pumps, industrial air heaters, dryers for compressed air, roof fans, rapid freezing units for food, etc.

AC Axial Fans

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AC axial fans are an efficient, reliable and cost-optimal solution. Their tested design allows for simple and quick installation in various industrial applications. With their reliability, low noise emissions and energy efficiency they achieve the energy values prescribed in the ErP European Energy Efficiency Directive.

Axial fans are driven by one - or three-phase induction motors with external rotors that are integrated together with propellers.

These can be made of composite (PA 6 – polyamide enforced with glass fibres) or sheet metal with a fan blade diameter of 200 mm to 800 mm.

The construction of AC fans of all sizes allows the fan to be direct connected with the attached supply cable whose type and length are adapted to the client’s requirements. Even more universal is the option of connecting the fan to the supply network with an attached terminal box.

In addition to standard voltage versions of one-phase motors (230 V ± 10%, 50/60 Hz) and three-phase motors (400/460V ± 10%, 50/60 Hz), we often develop a fan in a special voltage version for a client, or in line with national network and/or safety standards such as UL CSA, SASO, EAC, etc. 

This adaptability is equally present in the construction and equipping of fans with protection nets and mounting plates.

Areas of product application

AC axial fans are used in several applications for cooling, freezing, air conditioning, heating and ventilation. The fans perform the task of transporting air, either in the case of simple pipe or roof fans or in complex compressor systems with an evaporating and condensing heat exchanger (heat pumps, freezing systems, etc.) 

AC axial fans often form a constituent part of heating devices for industrial plants, compressed air dryers, cooling towers for process water, units for fast-food preparation and conservation, etc.