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  1. Home
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  4. EC fans: Overview
Index
  • Air curtains: Foundations

    • What is an air curtain?
    • Are air curtains effective?
    • How air curtains work?
    • Air curtains: Technology
    • Advantages and benefits of air curtains
    • Air curtains: Applications
    • Installation examples
    • Selection factors of air curtains
    • Air curtains control and regulation
    • Heat pump air curtains
    • EC air curtains
  • Airtècnics Air Curtains

    • Characteristics
    • R+D+i UPC university
    • Selection chart
    • Models and applications
    • Control and regulation
    • Accessories
  • Wellisair Technology

    • Wellisair: Hydroxyl Radicals Technology
    • Wellisair application sectors
    • What is Wellisair technology for?
    • Wellisair against bacteria: Tests
    • Wellisair against viruses: Tests
    • Wellisair vs Coronavirus - COVID-19
  • Ventilation

    • Fans: Overview
    • Heat recovery: Overview
    • Heat recovery: Types
    • EC fans: Overview
    • EC fans: Advantages
    • Rotary actuators for dampers
    • Fan speed controllers

EC fans: Overview

EC stands for Electronically Commutated, and it combines AC and DC voltages bringing the best of both worlds.

The motor runs on a DC voltage, but with a single phase 230VAC or three phase 400VAC supply. The motor incorporates voltage transformation within the motor.

The non-rotating part of the motor (stator) is extended to make room for an electronic PCBoard which includes power transformation AC to DC, as well as the controls.

fan ec

An EC motor (Electronically Commutated) is a brushless, direct current, external rotor type of motor. In commutation electronics, an AC voltage is changed into a direct voltage by a commutator.

The motor position is dependent upon voltage supplied via an inverter module (similar to the principle of a frequency inverter).

The EC commutation electronics are different from a frequency inverter in that they decide how the motor phases in the stator are supplied with current (commutation) depending on position, rotation direction and default.

fan ec diagram

Permanent magnets in the rotor produce a magnetic field which is required for full load production. A high efficiency, low noise, and continuous motor speed control is possible with this. An assembly flange on the rotor is used for impeller assembly. Depending on the motor type, a terminal box is available with cable screw connections or connection cable for easy and quick connection. Depending on the application area is possible to adopt further control functions (e.g. constant pressure control, volume flow control, temperature control).

Conventional DC motors have a housing which contains all the assembly groups like carbon brushes, the collector, bearing, armature with winding, etc. They are arranged one after another. With the EC motor assembly, more space is saved and a collector and carbon brush are not necessary. Therefore the motor is significantly shorter and consequently has advantages with regard to dimensions when installing and quiet operation.

The slightly higher investment costs for EC fans in comparison with conventional motors are mostly amortized within the shortest operation time because of the low energy consumption and lower installation costs (no transformer control, frequency inverter, or phased angle control is necessary).

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Products
Air Curtains
Air Purifier and Disinfection Units
Air Handling Units
Heat Recovery Units
Ventilation Units
Axial Fans
Radial fans
Centrifugal Fans
In Line Fans
Exhaust Fans Units
Cross-Flow Fans
Fan Heaters
Filters and Filter Units
Dampers and Shutters
Rotary Actuators
Regulation
Pressure Switches and Sensors

Air Curtains
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Air curtains with Disinfection and Purification System
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Technology
What is an air curtain?
How air curtains work?
Advantages and benefits of air curtains
Heat pump air curtains
EC air curtains
Airtècnics air curtains
Ventilation

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