New castle 1515 sensored electrical spec

[maxxximatoze]

Originally Posted by Pdelcast

Ceramic bearings can make it both quieter and reduce IO -- but be careful, they damage easy. And the front bearing is especially easy to damage.

I can't comment on what MOSFETs we use. But you can probably read the numbers off the top of the chips if you are interested. :)

OK no problem ;) . Mamba monster X can be removed from it's plastic box ? I don't want to ruin my brand new esc just to see the mosfet ref...

[Pdelcast]

Originally Posted by maxxximatoze

OK no problem ;) . Mamba monster X can be removed from it's plastic box ? I don't want to ruin my brand new esc just to see the mosfet ref...

Well, no. The heatsink would have to be removed to read the chips, and that would void any warranty.

Sorry.

[maxxximatoze]

OK so I will NOT take that risk ! I will have to wait for it to burn... Is the monster X prone to self combustion ? :) Do you know a compatible motor mount for the Hpi apache/vorza to put the 1515 sensored in the chassis ?

[maxxximatoze]

For info (and memory for me)

I have measured again I0, but this time with a higher motor temp (around 60°C) and the kv is rising up a little with temp (from 2220 to 2250) and I0 go down a little (-300mA from 4A to 3.7A@24V and from 3A to 2.7A@16V)

So the calculated max efficiency at 60°C of the motor is 93.7% for 16V and 91A (50W copper losses and 43W iron losses), and 94.0% at 24V and 131A (106W copper losses and 89W iron losses)

The esc+motor max efficiency is calculated to be around 90/91% for 16/24V

In fine, it's a pretty good motor with some high efficiency :)
I'm curious to see what would happen with hybrid ceramic bearing. I think I will do some tests later.

[Pdelcast]

Originally Posted by maxxximatoze

For info (and memory for me)

I have measured again I0, but this time with a higher motor temp (around 60°C) and the kv is rising up a little with temp (from 2220 to 2250) and I0 go down a little (-300mA from 4A to 3.7A@24V and from 3A to 2.7A@16V)

So the calculated max efficiency at 60°C of the motor is 93.7% for 16V and 91A (50W copper losses and 43W iron losses), and 94.0% at 24V and 131A (106W copper losses and 89W iron losses)

The esc+motor max efficiency is calculated to be around 90/91% for 16/24V

In fine, it's a pretty good motor with some high efficiency :)
I'm curious to see what would happen with hybrid ceramic bearing. I think I will do some tests later.

Ceramic bearing may decrease IO somewhat. But I wouldn't expect much of a difference.

When you compare our motor with others, you will notice our IO is very low, and efficiency higher.

[maxxximatoze]

After a few months passed with this MMX/1515 sensored combo in my car, I can say that I'am prettu satisfied with the result until now. The combo is powerfull and reliable (2.02 firmware), but I have two question:

1) what is the ESC overheat temperature treshold (80°C ?) and what is the audible tone sequence to inform the user of this state ?

2) What is the over current limiter setting and why we cannot set it like with the XLX? it seems to be around 150/160 amps continuous (for at leat 4 seconds), because I can't get above this max value and the KV of the 1515, which is at 2220rpm/V no load, drops to 1700rpm/V which is a big difference with only about 5 mohms phase resistance (with turnigy graphene 10Ah 25C continous discharge measured with wayne giles IR meter V2) see graph below.

Thx !

Full size link: http://maxime.pierron79.free.fr/maxpowertest.png

[Pdelcast]

Originally Posted by maxxximatoze

After a few months passed with this MMX/1515 sensored combo in my car, I can say that I'am prettu satisfied with the result until now. The combo is powerfull and reliable (2.02 firmware), but I have two question:

1) what is the ESC overheat temperature treshold (80°C ?) and what is the audible tone sequence to inform the user of this state ?

2) What is the over current limiter setting and why we cannot set it like with the XLX? it seems to be around 150/160 amps continuous (for at leat 4 seconds), because I can't get above this max value and the KV of the 1515, which is at 2220rpm/V no load, drops to 1700rpm/V which is a big difference with only about 5 mohms phase resistance (with turnigy graphene 10Ah 25C continous discharge measured with wayne giles IR meter V2) see graph below.

Thx !

Full size link: http://maxime.pierron79.free.fr/maxpowertest.png

1. 120C is the preset shutdown temp.
2. The overcurrent is set to around 400A initially, and drops with temperature. But I have to explain that the "logged" current is an average, and the "limiting" current is a peak -- so they may differ considerably.

Thanks!

Patrick