Go Back   RCCrawler Forums > RCCrawler General Tech > Electronics
Loading

Notices

Thread: Puller Pro tech thread

Reply
 
LinkBack Thread Tools Display Modes
Old 10-27-2010, 09:56 AM   #1
owner, Holmes Hobbies LLC
 
JohnRobHolmes's Avatar
 
Join Date: Nov 2004
Location: Volt up! Gear down!
Posts: 20,290
Default Puller Pro tech thread

This will be the tech thread for the upcoming Puller Pro motors. Since I can never leave well enough alone I have been working on improving motor designs for crawlers and robots for a few years now.


So where do we start? The basic design of the motor is relatively simple. I wanted a very rugged radial flux motor with a kv around 2000, salient poles, and low phase resistance. This translates into a lot of torque at low speed, and the typical shape of a "toy" motor. Brushless and sensors are also a must. The power to weight ratio on brushed motors is not that great, and sensorless motors just don't start up well enough.

I selected a 4 pole 12 slot inrunner design for this particular motor. The laminations are based on the Neu design, yielding extremely high efficiency for the aspect ratio of the radial motor. Since I am not limiting myself to "roar" specs this will allow for a slightly bigger rotor than other 4 pole 540 motors that will be showing up on the market soon.


Two main designs are being made. One 550 sized motor for BIG power (around 1600w peak), and one 400 sized motor (1000w peak) for MOA and shafties that don't need to go past 10mph. Both designs will employ some detent reducing techniques to ensure that low speed drivability is above anything else available (besides a few other motor designs I am working on). Above anything else, the Puller Pro is going to be the highest power to weight ratio possible.

Looking to break some parts? I can help Look for the brushless revolution to start again in crawling.

Last edited by JohnRobHolmes; 10-30-2013 at 11:28 PM.
JohnRobHolmes is offline   Reply With Quote
Sponsored Links
Old 10-27-2010, 09:56 AM   #2
owner, Holmes Hobbies LLC
 
JohnRobHolmes's Avatar
 
Join Date: Nov 2004
Location: Volt up! Gear down!
Posts: 20,290
Default

Specs (subject to change)

550 size-
9 ounces
5mm or 1/8" shaft
36 x 57mm case
19d x 23mm L 4 pole rotor


454 size-
4.5 ounces
1/8" shaft
29 x 48mm case
13d x 24mm L 4 pole rotor

400 size- TBD




Last edited by JohnRobHolmes; 11-09-2010 at 08:28 AM.
JohnRobHolmes is offline   Reply With Quote
Old 10-27-2010, 09:58 AM   #3
RCC Addict
 
Join Date: Jun 2006
Location: hillsborough
Posts: 1,031
Default

Very interested to see what you have come up with
scatterbrains is offline   Reply With Quote
Old 10-27-2010, 10:09 AM   #4
Rock Stacker
 
Join Date: Jan 2008
Location: Riverside
Posts: 55
Thumbs up

Break parts, hell yeah! Seriously I wanna make my rig pull wheelies!
Tryker46 is offline   Reply With Quote
Old 10-27-2010, 10:34 AM   #5
Custom Carbon Fiber
 
Robbob's Avatar
 
Join Date: Oct 2007
Location: Connecticut :(
Posts: 4,501
Default

Keeping my eye out for these ......
Robbob is offline   Reply With Quote
Old 10-27-2010, 03:23 PM   #6
Got Worms?
 
Join Date: Jun 2009
Location: Golden, CO
Posts: 6,116
Default

Watts what does like a one of your brushed 35t's do, or a current 7t puller.
losikid is offline   Reply With Quote
Old 10-27-2010, 03:29 PM   #7
RCC Addict
 
Join Date: May 2006
Location: China Grove, NC
Posts: 1,395
Default

Great news.
renoirbud is offline   Reply With Quote
Old 10-27-2010, 03:41 PM   #8
MODERATOR™
 
EeePee's Avatar
 
Join Date: Jul 2004
Location: Ohio
Posts: 18,928
Default

Quote:
Originally Posted by JohnRobHolmes View Post
One 550 sized motor for BIG power (around 1600w peak)
AKA, Losi motor.
EeePee is offline   Reply With Quote
Old 10-27-2010, 04:14 PM   #9
RCC Addict
 
Join Date: Jun 2009
Location: QLD, Australia
Posts: 1,512
Default

Sounds good What will your recommended ESC be? I assume MMP for the big one and RS for the smaller one?

Kieren
Aussie Nerd is offline   Reply With Quote
Old 10-27-2010, 04:22 PM   #10
Got Worms?
 
Join Date: Jun 2009
Location: Golden, CO
Posts: 6,116
Default

Quote:
Originally Posted by Aussie Nerd View Post
Sounds good What will your recommended ESC be? I assume MMP for the big one and RS for the smaller one?

Kieren
I'm hoping he will tell us about his big brushless power esc that he has been keeping a secret
losikid is offline   Reply With Quote
Old 10-27-2010, 04:28 PM   #11
I wanna be Dave
 
Join Date: Sep 2005
Location: USA
Posts: 11,196
Default

Interesting....
run2jeepn is offline   Reply With Quote
Old 10-27-2010, 04:41 PM   #12
Rock Stacker
 
Join Date: Feb 2010
Location: winnipeg
Posts: 68
Default

ill take 2!
samuraikid is offline   Reply With Quote
Old 10-27-2010, 08:19 PM   #13
I wanna be Dave
 
SVEN's Avatar
 
Join Date: Feb 2005
Location: Burnsville
Posts: 3,096
Default

It is always exciting to see what you come up with John. You can count me in on these. I'm especially interested in a pair of the 400 motors

Also curious about whether you are making your own ESC for these or if there is one that you recommend.
SVEN is offline   Reply With Quote
Old 10-27-2010, 08:26 PM   #14
RCC Addict
 
Join Date: Jun 2009
Location: California
Posts: 1,494
Default

Very interested.

How ya think these outrunners will be on dual RS pros, 3s, on a XR?
fa1rch1ld is offline   Reply With Quote
Old 10-28-2010, 01:43 AM   #15
RCC Addict
 
Join Date: Jul 2006
Location: Pasadena
Posts: 1,118
Default

Hmm, I'm thinking i'll need one for my scaler...and my new 6th scale ratrod project.
danielk is offline   Reply With Quote
Old 10-28-2010, 04:16 AM   #16
I wanna be Dave
 
Join Date: Nov 2005
Location: Here
Posts: 7,317
Default

You need to find a hobby...

Can't wait to see this one.
Rckcrwlr is offline   Reply With Quote
Old 10-28-2010, 04:58 AM   #17
Quarry Creeper
 
Join Date: Dec 2008
Location: ZETROC
Posts: 205
Default

Sounds great!
MX70 is offline   Reply With Quote
Old 10-28-2010, 06:09 AM   #18
RCC Addict
 
Join Date: Apr 2010
Location: Ringwood
Posts: 1,233
Default

bring on the power
asw27x is offline   Reply With Quote
Old 10-28-2010, 07:21 AM   #19
RCC Addict
 
shelljeep's Avatar
 
Join Date: Jan 2010
Location: Lafayette
Posts: 1,077
Default

Quote:
Originally Posted by EeePee View Post
AKA, Losi motor.
This is the one I've been waiting for.
shelljeep is offline   Reply With Quote
Old 10-28-2010, 08:18 AM   #20
Moderator
 
whoodie's Avatar
 
Join Date: Jul 2007
Location: Texas baby!
Posts: 1,498
Default

John, I'm really excited about these motors! Thanks for listening and giving us what we really want/need. Because a typical 540 "race" motor is 2 pole, will any of the currently available ESCs (MMP, RS, etc...) be able to drive the motor correctly?

Last edited by whoodie; 10-28-2010 at 08:50 AM.
whoodie is offline   Reply With Quote
Reply



Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 03:57 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.
Copyright 2004-2014 RCCrawler.com