Hi all,
I'm assessing 2 products as part of product development. Sliding gate motors to be exact.
Both units are 240 volt mains plug-in with a toroidal transformer. The drive motor itself is a 24-volt DC unit.
Both list identical 600 kg load capacity (although this is probably generic anyway).
I've come across a difference that I can't make sense of.
1 motor has a toroidal transformer with 22.1VAC output. The other, a 25.1VAC output.
What operational difference would this cause and why would they do this?

 

Both transformers should be able to produce 24VDC with plenty of overhead for the regulator.

Do you know if they are using a regulator at all? If so, what type? Linear or switching?

 

Hey Bob,
I'm new(ish) to electronics, but the voltage is regulated at certain points throughout the PCB.
The DC drive motor seems to be regulated to ~25.5vDC
Aside from the motor supply, the AC converts (around the board) to...
- 27.2 volts DC for battery backup charging
-15vDC for accessories
Your reply makes sense, which is why I see no operational difference when supply is alternated.
The main issue i'm trying to resolve is remote power supply, where the AC transformer can be up to 60 metres away from the motor itself. I suspect (until conclusive testing is done) that the 22.1VAC will suffer too much voltage drop over this distance compared to the 25.1VAC. We're using 2-core 1.5mm cable for voltage transfer.

 

If one is a toroidal mains transformer and the other an E-I lamination version, the former is a more efficient version, the magnetic field is retained within the device, IOW, no radiated (wasted) energy.

 

Both are Torodial mains transformers. Different manufacturers with different AC outputs.
60m of cable and a couple motors under load. Let's see if anything goes bang!

@BobTPH the overhead is definitely where my focus SHOULD be, rather than comparing the two side-by-side.
I just need to qualify if enough voltage is supplied, especially over distance.

 

Seems a bit daft to site a step-down transformer 60m away. If you have to run a cable anyway, why not make it a mains cable, and avoid the voltage drop and the necessity to use thicker cable?

 

Personally, I agree. I would have mains run and a double power point at the site.
But, i'm dealing with DIY consumers/installers who...
1 - Aren't licensed to run the power themselves
2 - Don't want the cost of paying someone else to do it.
So low voltage supply it is.

 

The DC drive motor seems to be regulated to ~25.5vDC

Is that voltage the same with both supplies? If not, it is not regulated.