RC-Monster Forums  
RC Monster

Go Back   RC-Monster Forums > Support Forums > Castle Creations

Reply
 
Thread Tools Rate Thread Display Modes
Old
  (#31)
Pdelcast
RC-Monster Titanium
 
Pdelcast's Avatar
 
Offline
Posts: 1,683
Join Date: Mar 2008
12.12.2017, 02:57 PM

Quote:
Originally Posted by maxxximatoze View Post
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. :)


Patrick del Castillo
President, Principle Engineer
Castle Creations
   
Reply With Quote
Old
  (#32)
maxxximatoze
RC-Monster Stock
 
Offline
Posts: 23
Join Date: Feb 2017
12.13.2017, 04:30 AM

Quote:
Originally Posted by Pdelcast View Post
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...
   
Reply With Quote
Old
  (#33)
Pdelcast
RC-Monster Titanium
 
Pdelcast's Avatar
 
Offline
Posts: 1,683
Join Date: Mar 2008
12.14.2017, 01:24 PM

Quote:
Originally Posted by maxxximatoze View Post
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.


Patrick del Castillo
President, Principle Engineer
Castle Creations
   
Reply With Quote
Old
  (#34)
maxxximatoze
RC-Monster Stock
 
Offline
Posts: 23
Join Date: Feb 2017
12.14.2017, 05:57 PM

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 ?
   
Reply With Quote
Old
  (#35)
maxxximatoze
RC-Monster Stock
 
Offline
Posts: 23
Join Date: Feb 2017
12.20.2017, 04:13 AM

For info (and memory for me)

I have measured again I0, but this time with a higher motor temp (around 60C) 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 60C 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.
   
Reply With Quote
Old
  (#36)
Pdelcast
RC-Monster Titanium
 
Pdelcast's Avatar
 
Offline
Posts: 1,683
Join Date: Mar 2008
01.08.2018, 01:44 PM

Quote:
Originally Posted by maxxximatoze View Post
For info (and memory for me)

I have measured again I0, but this time with a higher motor temp (around 60C) 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 60C 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.


Patrick del Castillo
President, Principle Engineer
Castle Creations
   
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



RC Monster




Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
vBulletin Skin developed by: vBStyles.com