BLDC Pump PWM Control

Other Hardware Motors, Mechanics, Power and CNC
1

Hello, I'm developing a filter coffee machine with a BLDC pump.
I received pump samples this time, and I would like to test it with Arduino.
(Unfortunately, I'm not an electronics expert)
(Pump specs: 12V, 0.42A, Max flow:410L/H, Max heads: 2.5m)

The pump I received was explained by the developer that it could control PWM (Duty cycle: 0~100%,Frequency: 50~800Hz 5V).
The pump I received was three wires (Red, Black, Yellow).

Originally, I was going to get a cheaper BLDC motor, but I heard that model doesn't have PWM control model. Therefore, I was going to pay a little more and get a model with PWM control. ㅗHowever, maybe because I asked too many questions, they said they would send me the above samples for free, and I received them this time.

I understood it as an explanation that it includes a controller or driver with built-in PWM control, but when I received the sample this time, there were only three wires.

As far as I know, models that can be controlled by self? usually have more than three lines, but I'm not sure if there is a product like this, or if a model without control came because of a communication error.

Does anyone know about this?

Thank you.

2

One wire (black?) for GND, one (red?) for Vcc (12V?) and one for PWM. Similar to a servo motor connector?

Search for model number or more information on the pump itself.

3

Hi, @horenge7
Welcome to the forum.

A link to data/specs of your pump motors would be great.

A block diagram of your coffee maker would be good also.
Have you got a pressure vessel with heater?

Thanks.. Tom... :smiley: :+1: :coffee: :australia:

4

Thank you for your opinion.
Yes... I think you are right. I just found a sticker about the role of lines in the box. I didn't think it would be hallless because the price is just 13-15 dollars...
Maybe there was an improvement, but the number of lines is different from the picture shown in the datasheet.

5

I cannot find any information about the wires. Their number varies depending on selected options.

6

Hello Tom :slight_smile:

Unfortunately, we haven't made a diagram yet...
We are going to make it without a boiler.
Have you ever heard of film-type heating equipment?

Thanks

7

That's right. I only saw the wires in the photos on the datasheet.
Anyway, according to the information attached to the sample they provided, you are right. Yellow is PWM.

8

Will it involve any water pressure?
Is it like A POD type machine or a steam pressure expresso type.

Will you be pumping water at high pressure?

Thanks.. Tom.. :smiley: :+1: :coffee: :australia:

9

It's not an espresso machine or POD type.
It's an IoT filter coffee machine. Therefore, it only need a small pressure like under 5 bar(72.52psi).
Besides that, you can extract tea or use it as a hot water dispenser.

Our goal is to miniaturize machines like the Pour Steady. Since we don't use boilers, It can change the water temp and flow late for each extraction.

By the way, do you know how to control a 12V motor with V, GND, and PWM wires by Arduino? :joy: :sweat_smile:

Thanks

10

This was already answered in post#2.

Red(+) and black(-) to the 12volt supply.
Yellow to a PWM pin of a 5-volt logic Arduino and black also to Arduino ground.
Leo..

11

Aha... I just understood.
50~800hz 5V PWM...
If I understand correctly, 12V is not directly connected to Arduino, so no need transistor stuffs...

Thank you Leo

12

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.