I use Arduino to adjust the rpm of the electric motor

Projects General Guidance
1

Hello
I will join the arduino users. I wanted to know if it is possible to use Arduino to be able to create a circuit that, based on the pressure on a water pipe, decreases the rpm of the electric motor (water pump), which operates at 230 V.
Thank you in advance

2

Using an SSR it is thinkable to do. What kind of motor and what size of it?
Know that asyncronous motors draw 10 times the running current when they start.

3

Emo_Arduino:
decreases the rpm of the electric motor (water pump), which operates at 230 V.

I presume that is a mains powered AC motor. You need to know what type of motor. If it is a synchronous motor its speed is determined by the AC frequency.

Are you a sufficiently competent electrician to deal with mains voltages without killing yourself or someone else, or setting the house on fire? If not, get the advice of a qualified electrican.

...R

4

Emo_Arduino:
Hello
I will join the arduino users. I wanted to know if it is possible to use Arduino to be able to create a circuit that, based on the pressure on a water pipe, decreases the rpm of the electric motor (water pump), which operates at 230 V.
Thank you in advance

How is the pressure controlled now? What is the source of the water being pumped? Do want a dynamic regulation of the pressure, or just stop the motor/pump when a certain pressure has been reached? Do you have a tank that maintains the pressure with air or is the pump running all the time?

Paul

5

There are probably triac controlled AC motor speed controllers available that might be modified/hacked to be externally controlled. maybe something similar to the below but for 220v.

https://www.harborfreight.com/router-speed-control-43060.html?cid=paid_google|||43060&utm_source=google&utm_medium=cpc&utm_campaign=&utm_content=&gclid=EAIaIQobChMI7v-ctKTN5wIVh5WzCh0xYwMyEAQYByABEgKGM_D_BwE

6

TRIAC control of electric motors is possible, not particularly hard to do even as long as you have a proper snubber on the TRIAC or it may not be able to switch off (many light dimmer modules don't have this).

However there is the electrocution risk of 230V, so you have to know how to keep safe, and be prepared to see sparks flying when you do something wrong. It's the kind of thing that if you have to ask, you shouldn't try.

7

Hi
If the motor is a 230Vac synchronous motor I highly recommend a VSD, Variable Speed Drive, and forget about Triac/SSR control.

A synchronous motor begin solely SSR controlled can get into very serious and dangerous situations when asked to vary its speed to perform such a pressure control activity.

The motor will need independent fan cooling and temperature monitoring, also because these motors are only made for one speed, as you control this speed so the maximum drive parameters change.
VSD's can be setup to do these operations and enforce adjusted safety limits.

Tom.... :slight_smile:

8

Emo_Arduino:
Hello
I will join the arduino users. I wanted to know if it is possible to use Arduino to be able to create a circuit that, based on the pressure on a water pipe, decreases the rpm of the electric motor (water pump), which operates at 230 V.
Thank you in advance

Might be more helpful if we knew why it is necessary to begin with.
Obviously it will be costly.
A simple pressure switch and pressure balloon tank has been the norm for literally millions of pumps over the years and works well.

9

I guess Emo only asks questions. Does not answer questions.

Paul

10

During 1 1/2 day 8 answers were written by helpers. Maybe OP has a job that needs attention? 1 1/2 day isn't much guys.