New Nano Speed Controller

[Kazzer]

Short of space? Looking for a really reliable, yet small Speed Controller?



At only $29.00

# ABSOLUTE short circuit and motor overload protection
# 10A current limit
# Dual core microprocessor
# 4.8-12Volts input voltage
# Adjustable features include programmable reverse (including disable) & programmable brakes
# 4 Layer super power circuit board
# Thermal integrated protection system
# Digital one touchset up

We are fitting these into our new Mini Sub-driver for Revell and Trumpeter 1:144 scale models.

[toppack]

Mike,
Are there holes in the PC-board that wires are inserted into and soldered, or are the motor wires connected some other way, to the nano ESC? Can not tell for sure from picture.

[Kazzer]

There are holes in the board.

[Slats]

Is there a BEC?

J

[Kazzer]

Is there a BEC?

J

**INDUSTRY FIRST**
NEW built in failsafe to protect against complete loss of signal or when out of range - compatible with all manufacturer's receivers

[Subculture]

Some modellers are dreadful at soldering, or will try and use an iron far too big, lift tracks etc.

This could lead to a lot of returns, I'd recommend a soldering service with some flyleads ready for soldering on a connector.

[toppack]

Do you have a Current output Max rating of the BEC's 5. volts out.
I'm just finding out that some of the smaller ESCs have a very low BEC (battery eliminator circuit) current capability, so now I'll start checking that before buying, to make sure there's enough current to handle all the servos and switches installed. The BEC's current max is very seldom mentioned in ads and wright-ups on them.

[Slats]

**INDUSTRY FIRST**
NEW built in failsafe to protect against complete loss of signal or when out of range - compatible with all manufacturer's receivers

Mike,
a BEC is a Battery Elimination Circuit - not a failsafe.
So is there a BEC?

J

[Slats]

Do you have a Current output Max rating of the BEC's 5. volts out.
I'm just finding out that some of the smaller ESCs have a very low BEC (battery eliminator circuit) current capability, so now I'll start checking that before buying, to make sure there's enough current to handle all the servos and switches installed. The BEC's current max is very seldom mentioned in ads and wright-ups on them.

Rick,
god points. If this does have a BEC I'd imagine it might be small current.
Interesting also is that the more input voltage you give ESCs that have linear type BECs the less BEC current it can take. Eg. Say an ESC has a BEC of 1.5 amps, and it will take voltage input of 6 through 12 volts. The 1.5 amps stated will tend to be for the lower voltage input. Have seen one device recently where the stated BEC current of 1.5 amps was actually only 0.8 amps if you put 12 volts through it.

I am now spending the extra few dollars on the separate 3 amp switch type BEC. These come with noise suppression. - Heck the heli guys use them and they can ill afford any electrical noise glitch.

Best
J

[toppack]

Interesting also is that the more input voltage you give ESCs that have linear type BECs the less BEC current it can take.

Thanks, I did not think of that.
It certainly seems logical that there would be a total power limit, not just a voltage limit and a current limit.
Manufacturers should give specs for maximum for all three, and at some given voltage levels for current and power limits, to get the complete Info. Which is normal procedure for other IC and PCB production.

[KevinMc]

Manufacturers should give specs for maximum for all three, and at some given voltage levels for current and power limits, to get the complete Info. Which is normal procedure for other IC and PCB production.

Hi Rick,

While you're on the right track that knowing the maximum allowable power dissipation is a valuable figure, it's actually only part of the "total picture". "Power dissipated" is really a measure of how fast the regulator is converting electical energy into heat, but once converted this heat must find it's way out of the regulator- if it can't be removed fast enough the regulator will overheat and shut down. (Or let it's smoke out, and we all know how electronics stop working once they let their smoke out. ;) ) What's significant about this idea to us is that if you can get the heat out faster your regulator can dissipate more power. With a good heatsink, like the one found on the catalogue Mtronics ESCs you'll be able to hook up more servos than what you could without one. (Having said all this, you're not going to have room to hook up more than a couple of servos with the micro-ESC, to don't get bent on this point!) I guess where I'm going with all this is you not only need to understand how much power a given regulator can dissipate, but also what it's thermal resistance is (theta J-A if you speak "datasheet") so you can work out how hot the regulator die will get with a given load.

Now, after reading all this, did I make things better or worse?

[toppack]

Kevin,
Yes, I understand about heat-sinks, but attaching one puts the ESC back in the category of a Large one again, which defeats the purpose of these small package type circuits.

Don't some ESCs have an overload-protection-circuit that shuts down the output before it gets to the power level that will fry the components?
Is it this protection circuit that makes the output quit or is it just getting too hot to operate anymore, when you exceed the components power capability?
If it has an OPC, then it seems that it would be the controlling factor that determines how much it can handle before shutting off, correct?
Thanks,

[KevinMc]

Yes, I understand about heat-sinks, but attaching one puts the ESC back in the category of a Large one again, which defeats the purpose of these small package type circuits.

That's right, and you should only need a heatsink when you're connecting many servos to the BEC. This ESC is intended for small diameter Sub Drivers where there just isn't room for much equipment. In these cramped spaces you can't fit more than two or three servos which the existing ESC should be able to support. If you've got room for more servos, you've probably got room for a bigger heat sink too.

Don't some ESCs have an overload-protection-circuit that shuts down the output before it gets to the power level that will fry the components?

Is it this protection circuit that makes the output quit or is it just getting too hot to operate anymore, when you exceed the components power capability?

That's right, they do. (At least the better ones do.) And in the case where this protection device kicks in, that's exactly what's taking down the receiver bus. Without such a device you'd have "pop", "smoke", and no more BEC.

If it has an OPC, then it seems that it would be the controlling factor that determines how much it can handle before shutting off, correct?

Yes and no- The OPC kicks in when the die hits a specific temperature, not power level. If you, or the manufacturer, use a heatsink then the heat doesn't build up on the die because it's conducted away so you can safely put a greater load on the BEC. So the same BEC with a heatsink can handle more power than one without.

But again, I want to be clear that this should not be misunderstood as anything against this ESC or its BEC- I have every confidence that the built-in BEC will adequately handle a micro receiver and a couple of servos.

[Subculture]

Jeti do a high current linear BEC for those nervous about switch mode devices. It's compact(ish) too.

http://shop.singahobby.com/?q=node/13350

[toppack]

- The OPC kicks in when the die hits a specific temperature, not power level.

Thanks for the Info.
I wasn't sure if they had a temperature sensor circuit in them or if it was done some other way.