How does it work

[coolhandcountry]

I got a question. I like to know how an esc works. Does it regulate the amount of volts or the amount of amps?

[Serum]

Yes.. It's coolhand again... I thought you had something cooking.. .

you need to know that there is a difference between a normal esc and a BL esc.

The BL esc gives a combination of pulses, divided over the three wires. It actually are three circuits, that work allong to make the rotor turn.

one puls (motion) is made from several small pulses. I don't know if you know how a cd player works (how the output signal is made?) you need to understand that one puls is build up from several small pulses. the durarion of all that seperate pulses make the motion more or less intens. (that's the reason you hear your motor beeping, that unique BL-beep. The duration of the pulses that builds up one large motion make it more/less intens (more/less powerfull slower/faster) the reason you hear it beeping/whistling when you drive slowly, is because of the controllers frequency. this frequency also makes the rpm limit of the controller. If you load your rotor with something like, lets say, an emaxx, the rotor takes more energy. The puls stays the same voltage (BL controllers can't go above the battery voltage) so the amps are needed to make the watts. (power)

It regulates the volts, but if more power is needed it are the amps that make the power.

[Ozark-al]

So if the BL ESC works off of regulation of amps, through pulses, how does a regular ESC work? Is it just the regulation of volts?

[Serum]

No, but it are not three 'circuits' that work together.

It also makes pulses, but a DC motor is just one 'simple' stream of pulses. this pulsing technique is used to get the controller efficient, remember the mechanical speed controllers? the resistors getting hot? this heat is just a simple loss.

It's a combination of volts and A's, but but the A's are more relevant in the rather low voltage setups.

[coolhandcountry]

Okay. It helps some. thanks

sorry this isnt exactly on topic but the stock esc gives 5V to the steering servo correct? how much does a brushless controller give to the steering servo?

[Serum]

depends, i thought the 9920 gives back 5. Normally it's 5. The mamba 25 also gives back 5V.

oh ok is it only the hv maxx that gives 6v?

[Serum]

Mike can answer this one, i thought the 9920 had 5 volt, if i remember Mike saying this..

I don't know about the hvmaxx though.

[RC-Monster Mike]

BK controllers provide 5.5 volts(as long as the batteries have this voltage). The Novak gives 6 volts to the servos.

[crazyjr]

The Novak dually esc gives 6v and 3amps.

Hey Coolhand. the pulses Serum was refering to is your drive frequency

[coolhandcountry]

Ok! I think I have mine a 9khz right now. It does good so I have not changed for this set up. Thanks crazy.

Originally posted by crazyjr
The Novak dually esc gives 6v and 3amps.

I had a Tekin 420-G2 with a 6v 5a BEC, the servo had NO problem turning!

[Ozark-al]

Ok so when you change the drive frequency, what does this actually do to performance? Can you change the drive frequency? And please talk to me as if I'm stupid, because I am.

[crazyjr]

Some can change and some can't (brushed), it depends on how much you spend.
Brushless is a different animal, i don't know if they can all change drive frequency or only some and i don't know enough about brushless yet to know how. I'm sure Mike and Serum can help there.