#3 16 years ago

Brush-Less Motor ESC/Data-logger

What are your specifications for the boat, prop,battery capacity, motor KV. I think that those BL motors will be fine on direct drive if the KV is around 200.
I find it laborious to find brush-less motors that have kvm ranges as low as I need in the can sizes I need, so experimenting with programmable ESCs and data-loggers are necessary.
For example, on one ESC, it can have the throttle range be 10% or 20% of true throttle range, so a 2800 kvm motor magically becomes a 560 kvm motor...
another esc ( Castle/Phoenix ICE ) allows the user to program an exponential throttle curve, so at 90% throttle on the radio, the motor is at 30% of maximum throttle. then I set the transmitter so that at 100% of throttle stick, I am only sending 85% of the total value, so I end up with a motor that tops out at 25-28% of its max rpm. This is what is so liberating about programmable ESCs with data-loggers.It is also very reassuring to use the programmable low battery fail-safe for Lipo and LiFe battery packs.It is getting much simpler now that many BL motors are being experimented with.
Regards,
John

Regards,
Giovanni

#2 16 years ago

Brush-Less Motor ESC/Data-logger

HI John
Do you have any details to use these motors in a model boat? The data sheet is aimed at model planes. I see that the max efficiency current is variable between 30 - 60 amps and wonder if you have used the amp/wattmeter to take any measurements. is it possible that at lower speeds the wattage may exceed the esc/battery capacity with much wasted energy converted to heat. I have just ordered a wattmeter from GiantCod here in the UK and intend to check my brushless set up following an incident (thankfully not serious) with a LiPo. Hence my interest in any data you may be able to share.
Dave

Live long and prosper

Dave

#1 16 years ago

Brush-Less Motor ESC/Data-logger

I have been doing research on Brush-Less ESC/data-loggers and found some Interesting products.
One product Is the Robbe Roxxy Marine 940-6 ESC/data-logger.
This model has a very good reputation and Is pc programmable. http://www.rcmarket.org/bl-roxxy-950-6-pr-21008.html
Then there Is the www.raczing.com programmable BL ESC/wire-less Wi-FI data-logger that sends a live view to a Motorola Android or Windows 7 pc.It should work with the new Windows 7 cell phones that were just offered this week.They say that they will be making a marine version
( reverse programming ) soon.
One of the most sophisticated telemetry systems as long as we are headed this way Is the www.sm-modellbau.de system.It uses data-logger system with a 2.4Ghz RX/TX radio communication.They offer a long list of component sensors and live view data-logger screens.They offer USB programming and even offer a GPS, temperature , RPM , battery everything , barometric , G-force and speed sensor.
A good source of programmable ESC/Data-logger speed controls are Castle/Phoenix.They do offer a programmable reverse/forward option.http://www.amainhobbies.com/product_info.php/cPath/2_389_416/products_id/10268/n/Castle-Creations-Phoenix-HV-85-High-Voltage-Electronic-Speed-Control
Hope this helps anyone Interested In the latest gizmo.
Regards,
John

Regards,
Giovanni

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Brush-Less Motor ESC/Data-logger

Brush-Less Motor ESC/Data-logger

Brush-Less Motor ESC/Data-logger

Brush-Less Motor ESC/Data-logger