Power supplies struggling, should I be limiting the amps going to these DC actuators? Answered
This project started as this instructables project
However, instead I'm using a relay board (sainsmart 8 channel) and arduino to switch power from 4 separate wall plug DC power supplies to the individual actuators. Each power supply is connected to 2 channels on the relay, powering 1 actuator each.
These are the car door lock actuators
Working voltage: DC12V
Current consumption: 0.15A-2.22A
I am using 1 x 12v, 4.5A power supply, and 3 x 9v 1.5A power supplies (since this is what was needed for the original instructables project)
However, I'm noticing that the actuators will sometimes not fire when the circuit is connected, and they seem to be limited as to how quickly they can fire. This is more of a problem with the 9v than the 12v power. The 12v, when supplying power to two actuators at the same time, will not work. I don't understand how the instructables project seemed to have no issue powering these actuators with three 9v 1.5 supplies powering 12 of these actuators (with shields that can only output max 1.2A per actuator).
So that got me thinking that the motor shield is doing some sort of power regulating for the actuators. I think a single actuator, unregulated, is gobbling up all the power to the point that the power supply is shutting off, or at least has no more power to supply to anything else.
- Do I need to build some sort of regulator for each motor to limit it's power consumption? If so, what kind of regulator?
- Should I just increase power supplies to higher Amps until it's not a problem?
Any help is very much appreciated.