overvolting

[elobire]

does anyone know if its worth overvolting a 24v motor like this one:
http://secure.oatleyelectronics.com//pr ... 2cefc40094

im hopefully getting a relay motor control box from razordave that can run on up to 36v, so i just wanted to know if i tested it out on that voltage if their is any chance of damaging the motor (or if their is any point).

[leorcc]

Re: overvolting

im hopefully getting a relay motor control box from razordave that can run on up to 36v, so i just wanted to know if i tested it out on that voltage if their is any chance of damaging the motor (or if their is any point).

With overvolting you can always damage a motor. Most of the time, it is not even necessary to overvolt anyway. It is more or less dependent on what you will use the motor for and if the power supplied will be sufficient. 99% of the time I don't overvolt my motors. That 1% of the time I did, I snapped the axle from it.

If you are going to overvolt, stick to 150% maximum of the nominal voltage so 36V on a 24V motor would be okay.

[Lord Bob]

Re: overvolting

What does overvolting even do anyway?

[elobire]

Re: overvolting

What does overvolting even do anyway?

gives you more power.

[Lord Bob]

Re: overvolting

0o cool

[Moritz]

Re: overvolting

Is it possible to use this motor whit a Sabertooth 2x25 A speedcontroler?

http://www.hobbypeople.net/gallery/551562.asp

I have read somewhere ( perhaps on this forum ) that the Sabertooth can
take damage if you overvolt the motor to much...

[joey_picus]

Re: overvolting

The only way to know is to find out :P

Hobby motors are very poorly specified so there's not a lot of information about amp draw to go on, so it would probably depends largely on what you were using it for (weapon? drive? helicopter blades?). The only issues I know of with the Sabertooth controller are that they won't take 24v as a 24v pack will peak at well over 26v when fully charged (as Gary Cairns found out), and the current limiting is very good so if your motors are overvolted they may stop if rapidly accelerated as the initial amp draw is higher.

Hope all that helps.

[Moritz]

Re: overvolting

I guess you are right...the only right thing to do is probably to
buy a Fifty-Five and see what happens...

Now I have a similar question, and I fear that the answer is the same...

What happens if I use 6 Li-Po cells to a motor rated for 3 cells..?

It would not be the end of the world even if the motor turned into smoke
and ashes, but I really dont want to damage the speed-controller...

[joey_picus]

Re: overvolting

6 Lipo cells might be pushing the limit of what the controller can take - my system only runs on 3 cells though so I don't know for certain if it would take 6 fully charged cells, I'd get a second opinion on the matter.

[Moritz]

Re: overvolting

The speedcontroller can handle 6 li-po cells whitout problems, and it has worked fine whit the bigger motor I have.

The thing is that I have to use a smaller motor now, but i had planned to use the old ESC instead of buying a new one...
Sorry if I described the question wrong. Or perhaps I just misunderstood the answer...?

I am not as good at english as I would like to be...

[joey_picus]

Re: overvolting

I have met Brits who speak worse English than you do Markus, no worries there :P

If it works fine with 6 cells and a bigger motor, I can't see why it wouldn't work with the smaller motor - I would keep an eye on the amp draw though as the motor itself might draw more than the 45A peak at startup on 6 cells. Also, as you've guessed, there is a sizable chance of the motor exploding at 6 cells, but you don't know if you don't try, heh...

[Moritz]

Re: overvolting

Ok. The ESC kan handle 80 A continuously and 100 A for a
short time, so I think that wont be a problem.

I guess that I´m just afraid that the speedcontroller suddenly
will turn into scrap, as my Sabertooth did...