40.160. Schulze Question

[T.C.]

We have a 40.160. Schulze in a Rico 32" P mono.
The first test runs on the boat and the ESC is cutting off for no aparent reason?
Motor temp is 115, ESC temps are in the low 140 range ?
It will blast for 3-4 laps (1/8mi) then just shut off, we can let it set for a min. or two and it will start working again?
Reminds me of a UL1 and the cap situation they had?
Any idea's ?
T.C & T.J.

[Fluid]

Is this the new version with the caps on top of the board? I ask because a fellow club member had a similar issue running 6S on his new model 40-160. It seems even Schulze has teething problems with their controllers. The club member sent his back to Schulze, I haven't heard what they told him.


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[RaceMechaniX]

T.C.,

If you have the newer model (with the caps mounted on top of the board) invest the $20 for the computer cable as the newer versions have onboard datalogging. This will help solve the issue more directly.

Generally it sounds like a thermal issue or a low voltage cut-off. Are you running wide open when it does run? Running at part throttle signifigantly increases the heat generated in the fets which can result in a short run time due to thermaling.

Do your batteries have good C ratings? How many of the short runs can you get before its drained?

Tyler

[RaceMechaniX]

removed double post

[T.C.]

Yes it is the new model, the batteries are two Enerland 4S,45C,4400 .
The motor is a NEU 1527.5y, props are x447,x452. (happens quicker with the 452,but same temps)
As I said we can get about two-three laps on a 1/8 mile course then it shuts off, we wait about 2min. and it will restart.
We check the temps ASAP and get 115 on the motor and low 140's on the ESC.
T.C.

[Fluid]

This is very similar to our club member's experience. He runs 3-4 laps on a 1/6th mile course and it shuts down. When he substitutes a Hydra 240HV he finishes the heats easily. Sad when a Castle outperforms a Schulze......


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[RaceMechaniX]

Yes it is the new model, the batteries are two Enerland 4S,45C,4400 .
The motor is a NEU 1527.5y, props are x447,x452. (happens quicker with the 452,but same temps)
As I said we can get about two-three laps on a 1/8 mile course then it shuts off, we wait about 2min. and it will restart.
We check the temps ASAP and get 115 on the motor and low 140's on the ESC.
T.C.

T.C.,

It sounds like you are thermaling the esc. A 1527 0.5Y is a very hot motor capable of pulling 200+ amps continously. The 40.160 is better suited for higher voltages with less current. The 32.200 would be a better option in hindsight.

If practical save the 40.160 for a higher voltage set-up and run a 240LV. The 1527 0.5Y may just be too hot for a mono set-up running heat racing.

If you have the newer version pick up the USB 5V adapter so you can download the data from runs and confirm the current draw and internal temp.

Tyler

[T.C.]

Thanks for the replies:
Tyler where did you get your USB 5V adapter ?
Local or do I have to get through Schulze ?
We had the low voltage cutoff switch set at the higher setting and are hoping that was the problem ?
If not I guess we will have a 1527 .5y for sale. lol
T.C.

[RaceMechaniX]

T.C.,

I got my adapter from www.ecare-rc.com They are up in Canada and very responsive. Make sure you ask for the version of the adpater for the WK version. It is different than the aircraft version which can directly plug into a computer.

I run the LV cut-off at 3V per cell. Also check the timing, it should be set to 5 degrees or thereabouts.

Tyler

[T.C.]

Thanks Tyler, but I cant get the link to work?
Also do ya think having the ESC LV set on the high setting would shut it down using that motor?
Thanks T.C.

[Fluid]

Cell voltage can drop excessively with poor cells, and a lot even with good cells. I've seen under 3.3 volts per cell at ~150 amps with decent quality cells, and that motor can draw a lot more than 150 amps given the load. So the LVC 'could' be at fault - but that doesn't explain why the ESC stays off for two minutes before working again. The cells would recover as soon as the load was removed when the voltage was cut off.

I suspect this is the address he meant to post: http://www.icare-rc.com/

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[RaceMechaniX]

T.C.,
I had the link incorrect, try this one: http://www.icare-rc.com

You need the USB-ADAPT-UNI 5V-SIO apadpter, it looks like this:


Ask for Etienne at Icare, he'll know what you need.

Yes, I do think having the LVC on the higher setting may be causing the issue, but my first guess is that it is a thermal issue driving too many amps.

[T.C.]

Thanks for all the help guy's
We ran the boat again yesterday with a smaller motor and it did not cut off,
"BUT" it wasn't anywhere close to the 1527, but it was large enough to warm the ESC up to around 140-160.
So now I'm thinking it's the LV setting as well.
The reason being is that with the 1527 the ESC never got up over 140 degrees.
So if it was going off on a thermal wouldn't it have gone off with the smaller motor at 160 degrees?
Does that make any sense?
T.C.

[RaceMechaniX]

T.C.,

It my have been a combination of both. The esc thermals when the internal temp sensor reaches 110 C (230F) according to the manual. Although it seems you are far away from this unless you are measuring the fets direclty (i.e. contact probe) then you may be getting close enough to cause a thermal shutdown. Also, when you ran the 1527 you had shutdowns for several minutes which would have allowed the board to cool inbetween runs.

The logger will tell all.

Tyler

[gerardobrandao]

Schulze speed controller

I will give mine input:


I´m having a lot of troubles with the schulze 32 200.
I had similar problems like the ones you have,and i buyed the PC interface (5V SIO) in order to "see" the problem!What is strange is that only amps is downloaded from the speed controller to the pc software "akkusoft" and never exceeds 90 amps, with a scorpion 4035/800 and 10S and octura 1655 cupped prop....Give me a break...90 amps!!?!?!?.... i don´t see voltage, neither RPM, or internal temperature!
When i tried to put the timing in mine lehner 2250/5 in 15º like lenher recommends, the motor would start,but more the 1/6 throttle, it would cut off.....i had to put timing to 3 or 4º...don´t understand this!
Schulze products are having some strange problems, that aren´t being answered....specially for a ESC of 550€ or 650$$ ......
I have 2 top top esc brands.....MGM and YGE....Concerning quality,and assistance....5 stars...Of course this is mine opinion.....
Switching frequency is automatically defined,and mine scorpion motor is heating a lot...the ESC is killing it,thats why i stopped using it....in the YGE 200 HV navy i use 18º timing and 8KHZ switching frequency....with the schulze i have to use 30º timming and don´t know what is the switching frequency.......

Very Best Regards