Helping choosing a PWM for pump

[BeirKaiser]

Hello everyone,

I received bought a pump for my homebrew setup. How does everyone control the speed of the pump? I’ve found so few mini chips with knobs but no idea what to pick.
Stats:

• Name: Solar Water pump
• Brushless motor
• Material: Plastic
• Color: Black
• Input/Output: 1/2 "male thead
• Voltage: 12 V DC
• Nominal Maximum Current: 1000MA
• Power: 22 W
• Max Flow: 800 L/H
• Max Water Seat: 5 m
• Max circulation water temperature: 100 ° C

It only has a motor +/- and power +/-, no third wire. Or a brake. No idea what I’m doing

 

[eric19312]

It's never occurred to me to try to control my pump's speed. I think most of us put a ball valve on the output of the pump and use it to control the flow coming out of the pump.

 

[BeirKaiser]

It's never occurred to me to try to control my pump's speed. I think most of us put a ball valve on the output of the pump and use it to control the flow coming out of the pump.

I didn’t want to increase the pressure, made more sense to me to lower the motor’s speed to lower the flow rate

 

[eric19312]

cool idea maybe ask over in Automated Brewing forum...

 

[brewster2012]

https://www.ussolarpumps.com/wp-con...-on-Brushless-DC-Water-PumpsSpeed-Control.pdf
This should help

 

[BeirKaiser]

https://www.ussolarpumps.com/wp-con...-on-Brushless-DC-Water-PumpsSpeed-Control.pdf
This should help

I started there, dead end. Their chips and pumps have a third brake wire that mine does not. I emailed them for help, guy refused to help me because he said my pump wasn’t made by them even though it’s listed as a solar pump

 

[brewster2012]

Sounds like you need a simple voltage controller (variable resistor) instead of a PWM.


The easiest way to control a relatively low current 12-24V motor is by using a generic analog DC motor speed controller. This type of controller has a potentiometer to vary the speed of the motor. These controllers can be found with a wide range of power ratings.

 

[BeirKaiser]

Sounds like you need a simple voltage controller (variable resistor) instead of a PWM.

https://media.digikey.com/photos/TubeDepot/MFG_313-2440F.jpgThank you
One of these will do the trick? I wasnt sure because a read the brushless pumps need PWM

 

[Bobby_M]

Any of those PWM voltage controllers will do the job.

 

[BeirKaiser]

Thank you for everyone that helped! I contacted several companies, most of which in broken English, but I finally found a solution! Two birds with one stone in fact! This will control my pump and convert it to AC!

https://www.amazon.com/UTUO-dimmable-Adjustable-transformer-brightness/dp/B08MZZPB53/