Feeling the pressure?

Are you feeling the pressure in your application? Can’t quite get an axial fan to produce the flow rates you are looking for? Fans and blowers are both air moving devices but get it done in very different ways. So how do you know what is the right solution for you?

In your system you populate the internal volume of your space with PCBAs, power supplies, and everything else you need to make your device better than the rest. Once you have all the goodies packed in, you have minimal space for natural convection to help you out or push airflow through the system to get to your thermal happy place. Now comes the tricky part, is the system packed so tightly you can not blow air through it with a axial fan? The measurement you need is the system impedance, resistance, or static pressure. All these terms are referring to that situation and will help you ID the flow rates you need. If you are fortunate enough to be educated in the ways of CFD this will not be too difficult, if not you have to work through some trial and error.

Blowers are meant to be high pressure and low CFM vs an axial fan being high CFM and low pressure. The first noticeable difference between the two are the rotors; fan has blades and the airflow is axial(flow down the axis), a blower has a impeller that moves air at a 90 degree angle and is radial flow. The blower is the solution to a high pressure system that needs pressure to push air through a ducted system or high pressure airflow routes. There are small brush less blowers going up to 120mm, then if you are in larger applications needing more airflow and pressure you can move up to a motorized impeller, same idea, just larger scale. YS TECH has a new line of EC impellers that are available with speed control and many new programming features!

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If you want to learn more about our EC impellers and or solve your next design, contact us, we are happy to help!