New castle 1515 sensored electrical spec

[Pdelcast]

Originally Posted by maxxximatoze

For I0, I have tested at 0 timing. Same results at all voltage.

For phase Rm, I have double checked every of my measures of the new 1515 and all the results are good.

AB=5.6 mohms at solder tab 7 mohms at bullet
BC=5.6 mohms at solder tab 7 mohms at bullet
AC=4.4 mohms at solder tab 5.8 mohms at bullet

Just to compare here is the results for my old hpi alphastar 2350kv made by castle with shortened wires (old design without solder tabs)

AB=6.2 mohms at bullet
BC=6.2 mohms at bullet
AC=6.2 mohms at bullet

Perfectly equal phase to phase. I have to say that I am a bit desapointed by the result of the 1515 sensored. I will have to check how the coper wires are connected to the tabs, maybe a defect. How can I check if it's a genuine castle ? Amain is a reputable store, isn't it ?

Disappointed by what?

Those are excellent numbers. At 100A, the whole motor is only dissipating 50W.

The difference is simply that there are tabs -- and A & C phase have slightly higher resistance because they go farther around the rear of the motor, while the B phase terminates right at the terminal.

Perfectly normal. The motor phases are balanced, there's just some additional resistance on A&C for the tabs.

Thanks!

Patrick

[maxxximatoze]

Originally Posted by Pdelcast

Disappointed by what?

Those are excellent numbers. At 100A, the whole motor is only dissipating 50W.

The difference is simply that there are tabs -- and A & C phase have slightly higher resistance because they go farther around the rear of the motor, while the B phase terminates right at the terminal.

Perfectly normal. The motor phases are balanced, there's just some additional resistance on A&C for the tabs.

Thanks!

Patrick

OK, it's certainly perfectly fine. Do you if high grade ceramic bearing can reduce I0 in a measurable manner, or it's useless ? (and make it run noise free, the orignal bearings tend to make some noise at different rpm)

Ps: what is the toshiba mosfet ref used in the mamba monster X, if it's not top secret, TPHR6503PL ? just to know... And I promise, I stop bother you with all my questions ;)

[Pdelcast]

Originally Posted by maxxximatoze

OK, it's certainly perfectly fine. Do you if high grade ceramic bearing can reduce I0 in a measurable manner, or it's useless ? (and make it run noise free, the orignal bearings tend to make some noise at different rpm)

Ps: what is the toshiba mosfet ref used in the mamba monster X, if it's not top secret, TPHR6503PL ? just to know... And I promise, I stop bother you with all my questions ;)

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. :)

[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.