Brushless (BLDC) Motor/Pump speed controller

Thread Starter

Ford Prefect

Joined Jun 14, 2010
173
Hi guys,
I have ordered one of these pumps via eBay..
https://www.ebay.co.uk/itm/1-2-800L-H-5m-12V-24V-Brushless-Motor-Water-Circulation-Water-Pump-Tools-100/322946395973
but thinking that 800L/H maybe too fast to cope with what I have planned.
My question is, Is it possible to construct a simple circuit maybe with a potentiometer and transistor like this...
Motor Speed Control.JPG


(or something similar) to regulate the speed of a Brushless Motor/Pump so that it will give a reduced litres per hour to about between 400 and 800 L/H or does it need a PWM speed controller such as this?...
https://www.ebay.co.uk/itm/PWM-DC-6V-12V-24V-28V-3A-Motor-Speed-Control-New-Switch-Speed-Controller-WST05/302320673539

What are your suggestions to control the speed of this brushless pump and subsequently reduce the litres per hour?
Thanks
 
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