Losi Announces New ROAR Legal Sensored Brushless Systems

[George Gonzalez]

NEW from Losi: ROAR-legal sensored BL systems



(3/31/2008)
George Gonzalez

Latest from Losi, the Xcelorin brushless lineup now has includes sensored systems, and they're ROAR-legal. Official info below, talk about it in the Hot News & New Stuff forum.

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1/10 XCELORIN SENSORED SPEED CONTROL

High-performance brushless electronic speed control for 1/10-scale vehicles

SPEED CONTROL FEATURES

- Fully programmable sensored ESC for most brushless

540-sized motors of 3.5 turns or more

- Three stored profiles accessable for convenience

- Software interface for unlimited profile settings and tuning

- PC setup software CD included for complete configuration of profiles

- Quick Programming Card

- Forward/Braking or Forward/Braking/Reverse configuration

- Single-step transmitter setup

- Optimized for spread spectrum or traditional radio systems

- Four LEDs to indicate functions, settings and errors

- Adjustable low voltage cutoff

- Automatic thermal protection

- Throttle limits can be set for Forward, Reverse or both

SPECIFICATIONS

Input voltage: Ni-MH 6–12 cells or 7.2V–14.4V;

LiPo 2–3 cells or 7.4V–11.1V

BEC: 6.0V / 3A

Operating Current: 100A continuous; 540A peak

Motor Limit: 3.5T or higher sensored brushless motors

On-Resistance: 0.00040

Low Voltage Cutoff: Adjustable via program card or PC interface

Drive Profiles: Multiple with program card; unlimited with PC interface; 3 stored

Operating Frequency: Spread spectrum optimized or traditional radio systems

Dimensions (W x L x H): 1.1 in x 1.54 in x 1.3 in

(29.5 x 39mm x 33.2mm); height with fan uninstalled: 0.9 in (23mm)

Weight: 1.7 oz (48 g) without lead wires

LOSB9500 1/10 Sensored Brushless Speed Control


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1/10 SENSORED BRUSHLESS MOTOR

High-performance brushless system for 1/10-scale vehicles

MOTOR FEATURES

- Sensor cable supplied (different lengths optional)

- No cogging sensor design

- Compatible with most sensored electronic speed controls

- Long-life neodymium sintered rotor for superior torque and

stronger braking

- Precision ball bearings for improved performance

- Low profile, easy-to-solder tabs

- Minimal motor maintenance required

MOTOR SPECIFICATIONS

Shaft Length: 0.63 in (16mm) with flat

Shaft Diameter: 0.125 in (3.17mm)

Dimensions (L x D): 2.15 in X 1.4 in (54.5mm x 35.8mm)

Weight: 6.7 oz (190 g)

Motor Connectors: Low profile solder tabs

Sensor Cable: 8.3 in (210mm)

LOSB9400 1/10 Sensored Brushless Motors 3.5T

LOSB9401 1/10 Sensored Brushless Motors 4.5T

LOSB9402 1/10 Sensored Brushless Motors 6.5T

LOSB9405 1/10 Sensored Brushless Motors 8.5T

LOSB9403 1/10 Sensored Brushless Motors 10.5T

LOSB9404 1/10 Sensored Brushless Motors 13.5T

LOSB9406 1/10 Sensored Brushless Motors 17.5T


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1/10 XCELORIN BRUSHLESS MOTOR/ESC COMBO

High-performance brushless system for 1/10-scale vehicles

LOSB9550 1/10 Brushless Sensored ESC/Motor Combo 3.5T

LOSB9551 1/10 Brushless Sensored ESC/Motor Combo 4.5T

LOSB9552 1/10 Brushless Sensored ESC/Motor Combo 6.5T

LOSB9554 1/10 Brushless Sensored ESC/Motor Combo 10.5T

LOSB9555 1/10 Brushless Sensored ESC/Motor Combo 13.5T

LOSB9553 1/10 Brushless Sensored ESC/Motor Combo 17.5T

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Included with speed control and controller/motor combos: Quick Programming Card (QPC) and USB Software Interface

An Xcelorin Advantage: the QPC card allows adjustment to the ESC without the need of a computer no matter where you are. Or, make adjustments and set tuning options from a computer including brake and throttle curve settings using a simple to use graphical software interface.

[ElectricThunder]

Finally. A sensored controller that can handle more than 2s lipo! Does it not run sensorless motors though?:(

[viper7016]

Sensored, 3s lipo and computer programmable?! Where do I sign up?

[SS Pede]

So will all of those motors be OK for 3s LiPo? The low turns (3.5???) seem like they would be pretty crazy with that much voltage. RPM's would likely be way above what is considered "safe." Yet the sensorless Excelorin motors and now perhaps the sensored ones are putting the MM7700 to shame (on paper).

[ElectricThunder]

I doubt they're going to spec the lower turn motors for 11.1v; they'd be crazy to do such a thing. However, it'd be friggin' funny to drive a 3.5 turn motor on 11 volts.:D

[viper7016]

I know one way to find out...:D

[ElectricThunder]

Go for it. Post videos too...:D

I just noticed that this ESC comes with a programming card. VERY nice touch. So not only is it PC programmable, but also has a portable programming option. I like that very much.

[Tamiya4ever]

Is there any brushless motor faq? What is the difference between sensored and sensorless, sintered and non sintered and how can you program your ESC on your computer? I love to know that since I am online for 3 hours a day at home lol

[ElectricThunder]

Go to the brushless motor forum and start reading and searching. That's one good start.

I'll answer those questions here though for a starter.

1) Sensored and sensorless- A sensored motor has little Hall effect sensors (3 of them spaced 120 degrees from one another; a triangular pattern) in the endbell that detect where the rotor (which is the magnet) is in relation to the windings on the stator. This information is relayed to the ESC via some sensor wires, and so because of this, the ESC always knows where the magnet is. Since the ESC always knows where the rotor is, it can fire the proper phase (coil of wire wrapped around the stator) at the proper time to produce rotor movement in the proper direction.

Sensorless goes about "seeing" the rotor in a different way. It has to "guess" where the rotor is according to back EMF generated by the motor. Whichever phase/coil is not in use at a given moment in time is used to relay the EMF signal back to the ESC through the motor wires. From this signal, the ESC "guesses" where the rotor is and then attempts to fire the next phase in the sequence to get the rotor to keep moving.

2) Sintered vs. non-sintered- Sintering is a technique that is used to get something purer essentially. The material, in powder form, is heated to just below its boiling point so that the various powder particles stick together to form a purer product. A sintered rotor has stronger magnetic field than a non-sintered rotor (probably because the sintered rotor is far purer and contains a higher amount of neodymium and other "stuff", which is a common rare earth magnet used in brushless motors).

3) PC programming- Certain ESCs, such as this Losi, or the Mamba Max, have parameters that can be programmed via software on the computer. The Mamba Max has a USB port on it to hook a USB cable directly into it from the computer to the ESC. It also comes with software to install on your computer. Once the ESC is hooked up to the computer, you click on your programming software, and a window opens up. For the mamba max, it has several tabs for different things. You can adjust brake percentage, start power, motor timing, throttle curves, and a bunch of other things through this. Don't confuse this with programming the forward, neutral, and brake/reverse endpoints though. Your PC can't do that; you have to do that with your transmitter still.

That's a basic synopsis of those three things.

[rhcsavage21]

hmm a 3s lipo and a 3.5t hmm linkster i'm coming for you :D

[Mini-TBasher55]

I might pick up one of the motors...I woulda sworn I saw this yesterday and I didn't really think it through, so I just ordered a Novak 4.5r motor.

[ducklake1]

How do these compare to the traxxas brushless motors?
Just curious cause i got 2 VXL's in my e-maxx, and am wondering if these are better?

[Tamiya4ever]

Thanks Electric Thunder thats a great help!

[ElectricThunder]

You're welcome.

ducklake1- They're a completely different design, and meant to do a completely different thing (IE- this losi system is aimed at racing, vs. the VXL system being aimed at bashing).

I'd say keep your VXL systems and if you want some speed, throw in a 3s lipo and have some fun.:D

[SS Pede]

I doubt they're going to spec the lower turn motors for 11.1v; they'd be crazy to do such a thing.
That's what I would think too, but they seem to be unabashedly speccing their highest-kV sensorless motor for 3s.

[Joel Novarro]

There were a few guys running these at the recent ROAR OnRoad Nats in Omaha i just covered. They looked pretty smooth and linear on the accelerations on the track. I checked out the set up program on one of the racer's laptop and its pretty comprehensive on every possible adjustment on the ESC. I want one!! :D

[ElectricThunder]

I've seen some of the setup windows; it looks like the mamba adjustable stuff too. Always good.

[wlfgnggtr]

So who makes it??? I know it's Losi branded, but at first look I thought Novak Gtb clone, but after reading that it was programmable via PC, that threw me off on the Novak clone. Anybody have any ideas on the maker?? Or is all Losi??