09-24-2008, 03:30 PM | #41 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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Ye Haw!! First try and it worked! I had to guess on which termination was which, since I couldn't follow the wiring fully on the motor. I even tried it on my novak Goat just to be sure. First try, what luck! Now to tell manufacturers what to make me, cause they didn't have a clue how to do it otherwise. How small of a motor can we use? My first motor is a 3008 with a 3016 end bell for extra magnet length so the sensors can hang over and have something to read. The startup speed is still a bit faster than a brushed motor as the field voltage must be high enough to break the hold of the magnets. Slow speed is much better than sensorless though, there is no beep and start jerk crap. Vid once I get it tidy and mounted in a vehicle. Gonna take a few more days, already spent 2 hours on this today. |
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09-24-2008, 04:00 PM | #42 |
Rock Crawler Join Date: Mar 2006 Location: North Carolina
Posts: 502
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Very nice!
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09-24-2008, 04:39 PM | #43 |
RCC Addict Join Date: Jul 2008 Location: Sin City
Posts: 1,332
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Nice work! Are the sensors going to be sturdy enough to run them on a MoA setup? In case i bang one on a rock. Sign me up! |
09-24-2008, 05:11 PM | #44 | |
Newbie Join Date: Sep 2008 Location: Boston
Posts: 7
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That is great. Are those the digikey sensors that you ordered? ...Do you mind if I give you a call after I get my parts in, what is the best time to reach you....... thanks max Quote:
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09-24-2008, 05:20 PM | #45 |
Quarry Creeper Join Date: Jul 2007 Location: 517
Posts: 341
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That is sweet! Keep us updated on the manufatures and such.
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09-25-2008, 08:27 PM | #46 |
Rock Stacker Join Date: Apr 2007 Location: Spokane
Posts: 96
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That is so awsome. This is going to be revolutionary for crawler motors.
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09-26-2008, 07:56 PM | #47 |
Winner of the '07 RCC dumbass award! Join Date: Nov 2006 Location: Up on a Mountain, out in the Woods
Posts: 661
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That Rocks man! What's the chances of getting a couple sets of the sensors WC |
09-26-2008, 09:31 PM | #48 |
RCC Addict Join Date: Dec 2005 Location: Tucson
Posts: 1,190
| Finally someone who knows what he's doing. Great job now that what we need sensored outrunner. Now the torque war is over. brushless baby |
09-26-2008, 11:32 PM | #49 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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Still have more research to do. I am seeing if the design can be changed a bit. The magnets are so strong that there is still a bit of a jump at the start. What we need is weaker magnets, in a sense. Maybe wave wound stators. More details to come as I throw it into a rig. What I want is a 6 ounce 3000kv outrunner with sensors. |
09-26-2008, 11:36 PM | #50 |
Quarry Creeper Join Date: Mar 2008 Location: Hilo
Posts: 458
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What kind of esc are you using? Im guessing the novak goat esc? Im not aware of many sensored esc's for crawling.
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09-26-2008, 11:42 PM | #51 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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The Tekin RS. Fully programmable, full drag brake, brushless, brushed, do all ESC with a sensor harness. Used a novak too but it isn't as programmable.
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09-27-2008, 12:00 AM | #52 |
I wanna be Dave Join Date: Oct 2007 Location: Houston
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10-20-2008, 10:35 AM | #53 |
Rock Crawler Join Date: Apr 2008 Location: Albany
Posts: 640
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Hi John Very Very cool project. Can you draw a simple electrical schematic (???) showing the hall sensors and how they are connected to the ESC. More pics would be great too. Can I buy the Tekin RS ecs from you? Evan |
10-20-2008, 11:52 PM | #54 |
Quarry Creeper Join Date: May 2007 Location: melbourne, australia
Posts: 274
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how you going with this i could really use this, got a 3800kv outrunner in a scaler, love to have low speed on that |
10-21-2008, 06:29 AM | #55 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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I haven't had a chance to do more testing yet, but it is on the agenda. I am working with a factory to produce a hybrid, something with less magnetic pole attraction but very high torque. If you look in the Roar Racing rules, the sensor pinout is in there. |
10-22-2008, 08:48 AM | #56 |
Quarry Creeper Join Date: Mar 2006 Location: Australia
Posts: 495
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very interesting stuff JRH....subscribed |
10-22-2008, 09:38 AM | #57 |
I wanna be Dave Join Date: May 2006 Location: HONDURAS...ROCK HEAVEN
Posts: 5,076
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John, would more sensors help in the jerkiness of the start up?
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10-22-2008, 12:04 PM | #58 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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No it would not. The startup jerk is because the poles have high attraction to the magnets, it is a function of the slot/magnet ratio. It takes some force to get the motor spinning basically. I am working on a different design right now. It may end up being an inrunner, but a high pole count inrunner to have much higher torque at low speeds as compared to currently available sensored inrunners.
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10-27-2008, 12:56 PM | #59 |
Rock Crawler Join Date: Jul 2007 Location: Portland,OR
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10-27-2008, 09:33 PM | #60 |
Rock Crawler Join Date: Nov 2005 Location: dallas
Posts: 866
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How about a stator built with some twist in it instead of the poles lined up in straight lines |
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LinkBack to this Thread: http://www.rccrawler.com/forum/electronics/136315-sensored-outrunner-motors-revolver-s.html | ||||
Posted By | For | Type | Date | |
Outrunner for rock crawler - Kv and low-speed smoothness, is my theory sound? - RC Groups | This thread | Refback | 10-07-2011 12:03 AM |
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