Save Electricity Electric Power Centrifugal Fan Pa66 Low Noise With
1. EC is easy
Permanent magnet motors running on high voltage direct current (DC)
electricity with built in AC to DC conversion allowing them to run
direct from single phase or three phase mains supplies. There are
several suppliers of such motors
2. What’s so special about an EC fan?
2.1 EC fans are generally recognised as being the latest thing in
energy efficient air movement technology, but what is an EC fan and
what makes it so special?
Although OFAN, the market leader in EC technology, is a China
company, EC has nothing to do with the Asia Community! In this
case, EC stands for Electronically Commutated which basically means
it is a fan with a brushless DC motor
3. Control options
To control the motor accurately and efficiently the integrated
electronics have to continuously monitor the motor speed and adjust
the control input. By making this circuitry available to external
sources it’s possible to provide simple speed control options.
Dependent on the motor type, any sensor which can provide a
0-10V/PWM or 4-20mA input can be directly connected to provide
closed loop control for temperature, pressure or whatever parameter
you choose to measure. No need to worry about DC supplies for the
sensors either, this is provided by another connection on the
motor. In fact, simply connect a potentiometer and you have
infinitely variable speed control. No triacs, no frequency
inverters and no whining noises! An EC motor under speed control is
4. How does this affect energy efficiency?
Doubling the speed of a motor increases its power input by a factor
of 8 so it’s very wasteful to run a fan faster than is required. If
you can tailor the fan speed to match the demand, the potential for
energy saving is huge. Even when compared to on/off operation, EC
speed modulation is much more efficient.
EC fans can also contribute to increasing the overall efficiency of
an application. In a cooling system for example, keeping the
refrigerant pressure constant rather than having it rise and fall
as fans switch on and off has been found to reduce the load on the
compressor resulting in even greater energy saving
5. Advantages of GreenTech EC technology
5.1 Tremendous energy savings of 30 % on average
5.2 Future-proof and ready for ErP2015
5.3 tntelligent electronics for numerous control functions
5.4 Hardware and software from a single source
5.5 Easy 1:1 replacement from AC technology to GreenTech EC
5.6 Can be used worldwide (due to wide voltage input)
5.7 Over 10 years of experience in the area of EC technology
5.8 GreenTech as implemented purchase proposition
6. Six reasons that make us the ideal partner:
6.1 Our systems expertise. As experts in advanced motor technology, electronics and
aerodynamics, we provide system solutions from a single source.
6.2 Our spirit of invention. Our 60 engineers and technicians will develop a solution that
precisely fits your needs.
6.3 Our lead in technology. Our OFAN EC technology is setting standards worldwide. And our
lead is your competitive advantage.
6.4 Proximity to our customers. At 20 sales offices worldwide.
6.5 Our standard of quality. Our quality management is uncompromising, at every step in every
6.6 Our sustainable approach. We assume responsibility with our energy-saving products,
environmentally-friendly processes, and social commitment
7. The facts about OFAN centrifugal fans at a glance
7.1 AC and EC centrifugal fans with forward-curved blades
7.2 "RadiCal" AC and EC low-pressure centrifugal fans
7.3 "RadiPac" EC medium-pressure centrifugal fans
7.4 Compact design with external rotor motor technology
7.5 Complete series for every application
7.6 100% speed-controlled analogue or serial interface
7.7 GreenTech EC technology for high efficiency
7.8 Quiet operation due to optimised flow control and ingenious
commutation of the EC motor
7.9 Perfectly matched components for easy installation: controller,
7.10 Extensive range of accessories