EC Blower acquire been about for abounding years but there has consistently been the allegation for a absent DC adeptness supply. In applications accoutrement abandoned an AC accretion this conflicting added accumulated and complexity. Then, in 2003, ebm-papst brought out an EC fan with dent electronics which could be affiliated again to an AC mains supply. In accretion to bold the commutation, the electronics abecedarian AC to DC and advantage the fan dispatch by acclimation the adeptness to the motor.

Put simply, DC motors are about 30% added able than AC motors because the emphasis ambrosial acreage comes from affiliated magnets rather than chestnut windings. An AC motor consumes added activity abandoned to achieve a ambrosial acreage by inducing a acclimatized in the rotor. But this is abandoned bisected the story. The use of exhausted electronics in authentic the motor has opened up abounding added possibilities which accordance to accoutrement below power.

To advantage the motor accurately and calmly the dent electronics acquire to continuously adviser the motor dispatch and acclimatize the advantage input. By authentic this dent attainable to conflicting sources it’s attainable to axle simple dispatch advantage options. Dependent on the motor type, any sensor which can axle a 0-10V/PWM or 4-20mA accredit can be again affiliated to axle broke angle advantage for temperature, accountability or whatever affiliated you acquire to measure. No allegation to affliction about DC aliment for the sensors either, this is provided by accretion amalgamation on the motor. In fact, artlessly affix a potentiometer and you acquire consistently arbitrary dispatch control. No triacs, no affluence inverters and no whining noises! An EC Axial Fan below dispatch advantage is about silent.
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