introducing new 1/8 120a car esc

[lutach]

Originally Posted by littlegiant

Braking? U mean the braking isn't strong enough?

What about the dimensions and weight of these escs? They look kind of high quality except for those black sponge paddings.

Here are the specs of the 120A, 90A and 35A 6S units:

120A:

LiPo Cell with / without BEC:2~6
BEC Type:Switching
Programmable BEC Voltage:Yes
BEC Output Current (Peak):3A(7A)
Current Rating(A):120A
Peak Current(A):170A
Weight(g):150
PCB Size(mm):60.0 x 43.5
BEC Output Voltage: 6V

90A:

LiPo Cell with / without BEC:2~6
BEC Type:Switching
Programmable BEC Voltage:Yes
BEC Output Current (Peak):3A(7A)
Current Rating(A):90A
Peak Current(A):130A
Weight(g):120
PCB Size(mm):42.0 x 37.0
BEC Output Voltage: 6V

35A:

LiPo Cell with / without BEC:2~6
BEC Type:Switching
Programmable BEC Voltage:Yes
BEC Output Current (Peak):3A(7A)
Current Rating(A):35A
Peak Current(A):50A
Weight(g):40
PCB Size(mm):37.0 x 25.0
BEC Output Voltage: 6V

[florianz]

just had an other ride, on grass, wheather got better. I am still a bit insecure, and don't want to destroy my new toy...

5s zippy-r (about2 yrs old), 1700kv losi motor, truggy-wheels, most times full throttle, and not too hard breaking (due to the grip I had once a somersault)

My impressions so far:
good
- great throttle response
- esc stayed cool, don't know if it's the better fan or the two 1000uf caps, but cooler than yesterday. regarding the heavy wheels and the grass, that's pretty good.

not so good
-heavy cogging sometimes after breaking. but most times very soft startup.

the other's guy esc burned, when the car rolled backwards and then wanted to go forwards, heavy cogging, then smoked. he says that this cogging can kill an esc.

here's a pic of the graupner genius 80r, and you see that it's the same like small one above

hope my pics work?!

[lutach]

Originally Posted by florianz

the other's guy esc burned, when the car rolled backwards and then wanted to go forwards, heavy cogging, then smoked. he says that this cogging can kill an esc.

My Schulze burned up when my truggy rolled backwards and when I applied a small amount of throttle to go forward (No cogging though). If the ESC cogs (Stutters), it's basically telling you it doesn't know where the rotor is and that can cause huge AMP spikes. If the ESC cogs a lot, you must stop immediately or risk loosing it or something else. It might just be a software issue due to the lack of testing or the ESC might just be made for 2 pole slotless motors.

[MetalMan]

Originally Posted by littlegiant

Braking? U mean the braking isn't strong enough?

What about the dimensions and weight of these escs? They look kind of high quality except for those black sponge paddings.

Not enough capacitance on the small ESC, so the FETs would have to take the load of braking, which has been known to be a cause of ESC failure. The braking would probably be strong enough, though, but I wish I knew how to program it...

[florianz]

had a short ride again today, once you got used to it, it's quite good.

startup is a bit coggy sometimes, maybe it's because of the 4 pole motor.

After I had again some closer looks today, I don't think it would break (?!), the casing is made of metal. only prob might be that it's not sealed, so dirt could get in.

together with a better 12v fan (attached to the batteries) it stayed almost cold.

after so many mmm, mgm or ezrun just burned w/out any reason, we should give that "budget esc" a chance.

I fixed the steering servo and will got for an other ride.

[himalaya]

The ESC is manufactured in Taiwan by a company named SAE. I have two on hand for testing. They've proven themselve reliable after tens of runs with 6S LiPo + 4 pole Neu-Castle motor. Always come back cool after packs of run, thanks to the big and ALWAYS WORKING cooling fan. It could have been made much better if the designer pays more attention to dust sealing. The metal case feels cool, at least visually. Also the form factor is on par with the MMM, or even a little smaller footprint. Low speed starting algorithm is a key point where SAE still have space to work on.

[florianz]

hey himalaya,
thanks for that info. That is right, it's not dustproof at all. like that the esc should be located in a save place in the car. do you have a manual you could send me (pdf)?
cheers
florian

[himalaya]

I don't have an electronic version of the manual, the one in my hand is paper form and was written in Chinese, and even worse, I lost it in the field. I'll contact the company to see if I can get a electronic version, or even better a electronic version in English.

The ESCs did come with a program box, but I never managed to figure out how to use it.

[florianz]

I can send you the manual. they sent me two different manuals yesterday, one for rtr and one for more options.

[florianz]

changed some things on the esc, as it didn't work today. I hava no idea what the problem was. at least the on/off switch was kaput and replaced it. also cleaned the inside, which was full of sand and dust. after about 10 lipos... further changed the caps, now running 3 1000uf caps, should be ok. not that much space, but it works...