bec ws no bec in esc??

[lundell]

What is the difference and what is at ur opinion the best??

been looking around for a nice esc :)
dunno if im going to brushless or not :)

[AndyKunz]

BEC gives a direct path for the motor noise to enter your receiver.

All my ESCs except the SC3-SPORT are opto-isolated. That means there is no direct wire connection between the two units - there is at least 600V of isolation.

I use BEC only on low-current boats, where noise is not as much of an issue. On a high-current setup, especially with a low cell count, the BEC voltage may fall below 4V.

Hope this helps.

You can purchase my ESCs through Electro-Marine and Pandan in the UK. Links to their sites are found on my "Order Online" page.

Andy

[lundell]

Ok thx for the explanation

I was just looking at ur esc's :) and thinking of getting one as soon as i have tried my new nitro hydro :)
Thinking of doing a smaller electric to if its fun to drive my nitro one :)

can one use the motors for cars in a boat or ?? ( have driven alot of cars in the past :)
what is the max turns in a boat without killing the esc and such??
i have some unused motors but mostly under 12 turns is it usable??

//Erik

[airdevil85]

I have the knotronic sun 300 esc, is there any way that I could make it not bec, and it still work properly?

[jdwxly]

You can remove the positive (usually red) wire from the connector that plugs into the receiver and it should work fine. The esc is powered by the motor battery, so it doesn't need that wire to operate. Then you can use a normal radio switch and battery for the radio itself.

On Futaba-style connectors you can often carefully lift the little plastic tab that locks the metal part of the connector into place, and then slide the wire/metal out. Be sure to insulate it, as it does carry around 5 volts DC. I usually cover this with heatshrink tube or tape it back out of the way. That way I can plug it back in if I want to restore the BEC at some point.

I'm pretty sure that this change will also isolate the motor noise from the receiver, but I'm not positive and it may depend on how things are wired inside the controller. Andy can probably clarify this point for us when he gets a chance.

[toyboy4145]

Airdevil,
For your application in the hydromite I would use the BEC. Not much room and motor noise wont be a factor on 6-7 cells.

[airdevil85]

there isn't much room as nate said so I think I will leave it as bec

[BruceC]

Originally posted by AndyKunz
BEC gives a direct path for the motor noise to enter your receiver.

All my ESCs except the SC3-SPORT are opto-isolated. That means there is no direct wire connection between the two units - there is at least 600V of isolation.
Andy

Andy,
Hi, I'm brand new here and just getting started in the R/C boat world (though I did R/C airplanes in the late 50's early 60's.) Question - Is there any downside to using one of your SC-3 SPORT units with BEC, but not using the feature? As noted below, one could clip the red wire to the receiver to cut the power (and noise) to the rcvr, and then use a separate battery pack for the rcvr. You would still have the option to use the BEC later in another application. Will this damage the unit or otherwise do some bad things?

I'm glad I just found this place. I know I'm gonna have a ton of questions and learn a lot.

BruceC

[AndyKunz]

Originally posted by BruceC
Question - Is there any downside to using one of your SC-3 SPORT units with BEC, but not using the feature? As noted below, one could clip the red wire to the receiver to cut the power (and noise) to the rcvr, and then use a separate battery pack for the rcvr. You would still have the option to use the BEC later in another application. Will this damage the unit or otherwise do some bad things?

Hi Bruce,

Not using the feature is fine. The noise will still be able to come in, though - the ground lead is still attached between the two electrical systems (only in the SPORT, all others they are separated). You will get the disadvantages of BEC w/o the advantage. You will still be only 6-12 cells, still have the direct noise path, and still have 60A capability.

DON'T CUT THE WIRE. Instead, you can "unplug" the red lead from the housing if you use a sharp knife point to bend the plastic tab out as you pull on the red lead.

The SC3-LITE is a 60A control like the SPORT, but it is opto-isolated like all the 90A controls. It's also $5 less expensive and will take 6-14 cells.

Andy

[BruceC]

Thanks, Andy. It's always nice to get the straight scoop right from the source.

Bruce