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03-02-2011, 10:58 AM
| #1 |
| I wanna be Dave  Join Date: Dec 2005 Location: Tax Nation
Posts: 2,289
|  Need BIG brushless controller
Im working on a project and I need some big time power. I cant find the specs on the motor but its an outrunner, about 8" long and 4-5" across. Ideas? I dont need reverse, only forward and brake.
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03-02-2011, 07:48 PM
| #2 |
| Rock Crawler Join Date: Apr 2010 Location: Kelowna, B.C., Canada
Posts: 529
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You could use he new mamba xl from castle. What's it going in? Pics are a must  |
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03-02-2011, 07:50 PM
| #3 |
| Rock Crawler Join Date: May 2009 Location: Queensland, Australia
Posts: 610
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Check out hobbyking champ. They're got some big ass plane & boat controllers that will do 200-300A continuous with 12s lipo input. |
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03-02-2011, 08:15 PM
| #4 |
| Pebble Pounder Join Date: Oct 2009 Location: Rapid City
Posts: 147
| http://www.castlecreations.com/produ...ix_ice_hv.html Guys run these alot on planes, might need good cooling on a ground baised rig. |
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03-02-2011, 08:18 PM
| #5 | |
| RCC Addict Join Date: Oct 2009 Location: In the thinking chair
Posts: 991
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03-03-2011, 05:50 AM
| #6 |
| owner, Holmes Hobbies LLC   Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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Do you have access to equipment to measure the inductance and resistance of the motor? Sounds like something that will fry about anything out there that is "hobby" class. I have a few options that could work for you, depending on the rpm and loads that you will be needing. What is it going in? |
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03-03-2011, 11:51 AM
| #7 |
| I wanna be Dave Join Date: Dec 2005 Location: Tax Nation
Posts: 2,289
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its going to be in an "insane" class puller this is the motor: http://hobbyking.com/hobbyking/store...idProduct=5139 looks like they have updated the site to include the specs... 150 amps 20-48v (unsure how many volts Ill end up needing) resistance is 17ohms it will be direct coupled to a gearbox from a tiller or snowblower. Im on a tight budget for it so Im hoping to not spend my shirt on the esc. The problem with an airplane esc... no brakes |
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03-03-2011, 12:02 PM
| #8 |
| I wanna be Dave Join Date: Dec 2008 Location: ?
Posts: 5,055
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oh crap what going on hear. I smell trouble |
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03-03-2011, 12:32 PM
| #9 | |
| Got Worms? Join Date: Jun 2009 Location: Golden, CO
Posts: 6,116
| Quote:
found this, it has brake http://hobbyking.com/hobbyking/store...idProduct=8937 or if you want to be a bit spendy go w/ castle http://www.castlecreations.com/products/mamba_xl.html | |
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03-03-2011, 02:49 PM
| #10 |
| I wanna be Dave Join Date: Dec 2005 Location: Tax Nation
Posts: 2,289
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the mamba doesnt have a high enough volt rating I dont care for the HK electronics, they seem to be very hit and miss. I also dont believe that motor only pulls 150 amps |
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03-03-2011, 03:11 PM
| #11 |
| Rock Crawler Join Date: May 2009 Location: Queensland, Australia
Posts: 610
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Holy soup can batman....that is a fookin massive outrunner. You might need to look into industrial brushless controllers by the looks of things.. |
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03-03-2011, 03:26 PM
| #12 |
| owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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What voltage do you plan to run? I can build up a controller with brakes and reverse for that motor, although you will be limited to about 6k rpm unless you want to install some sensors. We can use the Mini Stealth Pro for a base, it has a 100v max with the FETs and parts I install http://holmeshobbies.com/product.php...&cat=20&page=1. We could also use lower resistance FETs for 36v use. I don't know how many rpm you want to get from the motor, but there are ways to get things optimized. Shoot me an email if you want to hash things out some more, I have some ideas. Alternatively you can use a Castle HV 160. It will have the best sync under load with this motor, which you will need when the sled starts to climb. A fair warning for you, the skirt bearing is a hog on power and the bearings are pretty low quality on the motor. If you plan to get much use out of it you will have to swap the main bearings at least. |
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03-03-2011, 03:33 PM
| #13 | |
| Got Worms? Join Date: Jun 2009 Location: Golden, CO
Posts: 6,116
| Quote:
This is a brand new released esc, i'm not talking about the mmp or the mmm . If you didn't bother opening the link EDIT Just got off the phone with castle, guy told me 160-200 amps, and a 150 amp motor shouldn't be stressing it Last edited by losikid; 03-03-2011 at 03:45 PM. | |
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03-03-2011, 03:37 PM
| #14 |
| Rock Crawler Join Date: Feb 2010 Location: Chapin, South Carolina
Posts: 666
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Pictures are a must.
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03-03-2011, 03:49 PM
| #15 | |
| RCC Addict Join Date: Apr 2009 Location: Token's life matters
Posts: 1,836
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I want to email you for him just to see a one off beast of an ESC be built. I wishs I knew only as much as you have forgotten about electronics. That would be more than enough to fill my thimble sized brain. A build thread for an ESC. Now that would be awesome. WINNING. (sorry to drop the Charlie Sheen reference) Last edited by The Violator; 03-03-2011 at 03:52 PM. | |
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03-03-2011, 03:51 PM
| #16 |
| I wanna be Dave Join Date: Dec 2005 Location: Tax Nation
Posts: 2,289
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I knew about that esc from Ihobby, was my first choice but, when I looked at the link, it was right on the picture... 8s 34v. doing the math, 35v would put me at 6k rpm so the mamba would be right at its limit and I like error on the side of caution. 6-7k rpm is what I need. That way it puts it in the same range as a gas motor. Im definatly going to be thinking about those bearings. John, as I get a little closer to the project being ready for wiring, Ill hit you up, if nothing off the shelf will work. |
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03-03-2011, 04:01 PM
| #17 |
| owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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Let me know on it. I have been running similar motors and 36v to 72v power systems for a few years now. Even if you want something off the shelf, I can help with some of the finer details of programming and system setup. There are lots of little pointers I have learned from electric bikes and a few custom jobs that apply directly to what you are doing. Projects like this get me all excited!
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03-03-2011, 04:08 PM
| #18 | |
| Got Worms? Join Date: Jun 2009 Location: Golden, CO
Posts: 6,116
| Quote:
Edit, never mind, i see you were talking about rpms to be similar to what you have aa a gas motor...but still its the motor you have limiting it at 6k at 8s, so its not the mamba at its limit of 6k rpm, Last edited by losikid; 03-03-2011 at 04:16 PM. | |
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03-03-2011, 04:11 PM
| #19 |
| owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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It is the voltage limit of the ESC limiting rpms.
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03-03-2011, 04:27 PM
| #20 |
| I wanna be Dave Join Date: Dec 2005 Location: Tax Nation
Posts: 2,289
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running the motor the motor that comes in the 1/5 scale conversion would mean I would need to build a realy large gear reduction to get it down to the needed wheel speed. The out runner I found gives me 2 options, I can either run the setup Im planning or I can change to a dual chain drive with 1 chain on each wheel. Plus, I like castle esc's but, my experience with their motors has left me a bit longing. Ive found that the cheapy feigo motors seem to last longer and bend less shafts. |
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