voltage regulator and ESC

[Eddy]

Why does it not work when you hook up a voltage regulator to a speed control?
I tried this and the motor only rotates once or twice then stops.

[Gary Warner]

Why does it not work when you hook up a voltage regulator to a speed control?
I tried this and the motor only rotates once or twice then stops.
How are you hooking up a voltage regulator?

[Malc C]

Why does it not work when you hook up a voltage regulator to a speed control?
I tried this and the motor only rotates once or twice then stops.

Are you trying to regulate the input or output... brushed or brushless ESC ??

[Eddy]

between the battery and ESC

[Miami Mike]

It would be best if you gave us all the details, such as the type of battery, speed control, and voltage regulator that you're using, and why you want to use a voltage regulator in the first place.

[Eddy]

I am trying to get a motor to run at various speeds without it deviating with the voltage drop in a battery. Its to run a turbine engine.
Its a brush less10 amp castle and a out runner motor, its a batteries of America regulator.

[Miami Mike]

If you mean one of the regulators on this page (http://www.batteriesamerica.com/newpage8.htm) (Search page for "VR5.4".) then it will never work. It's made to power a receiver and servos, and can't supply nearly enough current to run your motor. I think you need to try a different approach.

[Eddy]

its the VR6.0, is there a better way of doing what I am trying to do?

[jeffs555]

Won't governor mode on the Castle Phoenix 10 do what you want?

[Eddy]

I tried it, but it did not seem to hold RPM on the motor.
changes in the rpm will make the turbine run different speeds too.

[Malc C]

I don't think that placing a voltage regulator before the ESC would work, even if the ESC was in govenor mode, because as the conditions on the motor will constantly change so will the demands on current from the battery by ESC to maintain RPM. The regulator could end up restricting the current available to the ESC.

[vintage1]

If you really want rock steady RPM then you need something like a piece of hardware between the receiver and the ESC that also detects RPM and can adjust throttle automagically.

[Malc C]

If you really want rock steady RPM then you need something like a piece of hardware between the receiver and the ESC that also detects RPM and can adjust throttle automagically.

And given the high speed of a turbine that would suspect that it would take somethink like a PIC with a high degree of resolution for the sampling

[vintage1]

And given the high speed of a turbine that would suspect that it would take somethink like a PIC with a high degree of resolution for the sampling

Response speed depends on turbine inertia..if high enough you don;t have to respond that fast.

Actually the best bet would be to hack the code in a normal brushless ESC..when you got to an RPM proportional to throttle input, simply fade off the pulse width till it stabilised..

Could be pretty weird..models flying around at - say - 50% throttle, and just reducing power in a dive..yeah even up to braking! and piling on the juice in a climb..

Castle ought to do that,. also make ESC's with 'sync' leads for twins and multis to get motors in exact synchronisation..

[Miami Mike]

Could be pretty weird..models flying around at - say - 50% throttle, and just reducing power in a dive..yeah even up to braking! and piling on the juice in a climb..Cruise control! :eek: I love it! :D