Brushless Motors

I have a few fans around from computers. Seems that 3 wires is pretty common for these. I wasn't sure which was what, so, I figured "nothin to lose" and hooked up the right voltage across 2 wires. My guess was right. It ran. But, having 1 out of 9 fanblades busted off, it shook a bit. So, I busted off 2 more blades to balance it. But now, even connecting it the same way, it doesn't run. So, how should a 3 wire brushless motor fan be wired?

Topic by Toga_Dan   |  last reply


brushed to brushless!

If you have been flying your RC planes a lot and have found them getting a bit boring, go brushless and get lithium polymer cells. brushless motors are lighter and twice as powerful as brushed. lithium polymer batteries hold the most electricity to weight ratio compared to standard Nicd and Nmh. Dont believe me look at your cell phone open the battery hatch and take out battery its probably a Lithium polymer or lithium ion notice how light it is and small it is now look at the volts/ mAH pretty amazing hu? Got a laptop it probably got a lipo to. you want to make the switch but dont know what motor, battery, ESC (ESC-electronic speed control) to get, just ask and ill give you a hand! i will need to know the motor and battery that came with the plane/ or that u are using. Are you flying glow (gas powered) and wana go electric? i can help u out their too! Their are 2 kinds of brushless motors outrunner and inrunner whats the difference? well outrunners spin slower with more power so it acts like it has a gear box (this eliminates the need for a gear box reducing weight and noise) it also has a different design (look at pics). inrunners have a brushed appearance but their much lighter and more powerful u might need a gear box through. update 2/20/08 new image added (not all comment boxes are working)

Topic by i make shooting things   |  last reply



How to power a brushless motor

How can i power a motor like this (with 3 pins) just to max speed? it's for a propeller clock. thanks

Topic by bfernandes1   |  last reply




power tool brushless motor

I want to replace the motor in my dremel for a brushless one and i just need some help in deciding which one to get. I also want to possibly upgrade the motor in my drill. The drill is only used for wood and i don't mind if either the drill or the dremel needs some kind of gearbox to get the most power from it. It would also be nice to know something about larger brushless motors as there doesn't seem to be much about them on the internet. Thanks in advance.

Question by monty324   |  last reply


Brushless motor upgrade for exceed?? Answered

I have an exceed sunfire buggy 1/10th and I am planning on getting a brushless upgrade. I don't know if the battery and car itself can handle the one i want. I have a 7.2v 4200mahNiMh battery pack and the motor I  want to get is a 5.5T 6000kv motor. I was wondering if anyone knew if my car could handle that. If it couldn't, would a 8.5T 4000kv motor be better? And how fast would the second motor go? Please comment soon if you know anything about these motors.

Question by Electroinnovation   |  last reply


Homemade Brushless Micro motor

I want to make this https://www.youtube.com/watch?v=Ft39Rdp_53w  Micro motor for my indoor plane, Anyone know how to make ?

Topic by DamienP7   |  last reply



How to use an external power supply instead of batteries with ESC and brushless motor? Answered

Hello, everybody, this is my first question here ! Recently I have made a remote controlling system for my friend's RC plane, the problem is we want to test it on the ground without batteries.. So, I told him we can use an external power supply that gives 12V, but we can't calculate the needed amperage(? A) ... We'll be using EMax 18A brushless motor + Emax 30A ESC , all of these are using 11.1V, so what and how can I calculate the needed specifications of the required power supply ? I wish you could help me, and thanx :)

Question by Hawk-Eagle   |  last reply


How do I choose proper power supply for my ESC Answered

Hi, I am very new to this, I apologize if my question is too stupid :) I bought a brushless motor: https://www.amazon.com/gp/product/B01FTX5S0E (I can't find proper specifications, so I am not sure what is the voltage for this, but somewhere on the internets it was mentioned that this model needs 11.1Voltage, and 15-25A or 30A max. (not sure how to check if that's accurate, the motor is RS 2212-920kv) I also bought an ESC (I hope it's correct one...) https://www.amazon.com/gp/product/B016KF0E2W/ it says 30A on it. So seems legit to me. Usually they power this setup with batteries. but I want to use a power supply to power this from 220v outlet. I have some power supplies at home rated 2A, which I am sure is not enough. so I assume I need to get a 12v 30A power supply.  I am afraid though that my assumptions will get me to burn my ESC, which will cause another month of waiting for new one. Would really appreciate some help. What power supply do I need? how many volts my motor requires? should I provide 30A? does this kind of supplies even exist?  Thanks!

Question by AvetisZ   |  last reply


Can I make helicopter with cd rom brushless motor and is there is any cheap brushless motor driver IC??

I was trying to do a helicopter. When I search internet about that all I found was done by using brushless motor with a module  that costs really high, to me , as I'm a student. So I decided to use brushless motor of my CDROM. Can anyone help to make a helicopter by using this motor. And also I need to know about a Cheap Driver IC or something that acts as a control cirucuit for that brushless.

Question by prazanthkj   |  last reply


Speed controller for brushless electric bike motor? Answered

I have obtained a 400W 24V 2800RPM Monophase BLDC motor with related power supply and a 24V 40A-rated pulse width modulator unit, however from what i understand the PWM won't give me full control (if any at all) of the actual speed of a BLDC motor. I want my motor's torque to remain relatively intact and for it to cover a range of about 50-300 RPM, with no need for exact control. Are my only choices to build a pulley mechanism or to buy a mechanical gearbox? I'd like to control my motor electronically.

Question by Khalim   |  last reply


Can you make a brushless motor with "axial" cores and magnets, rather than radial?

In the picture, the black discs are magnets, the copper cylinders are coils, and the acrylic disc spins on the central shaft. 

Question by DrNerdington   |  last reply


Brushless Motor from Photocopier, what to do with them?

Hello! I salvaged these motors from one old Photocopier and i honestly dont know how to use them. Actually, my knowleadge about motors (and electronics in general) is really limited, my last achivement was building my own 3d printer from scrap materials and by doing that I learned a lot about arduino, NEMA stepper motors and associated drivers, all thanks to the awesome people who shares knoledge in this and other websites, but i am still struggling with electronics in general. So now, my question is... what can i do with these motors? Is there a way to control them with Arduino? Any kind of imput would be appreciated. I found the datasheets online but i really dont know what to do with a datasheet... Thanks in advance and sorry if my english is a bit weird, it's not my native languaje!

Topic by Goth.Cat   |  last reply


What would be an appropriate diode for a motor driver? Answered

I'm currently building a brushless motor driver, and need to get some diodes to go accross the MOSFETs to prevent the reverse current going through them. The absolute maximum forward voltage through the motor is 15V, at 25A, so do the diodes also need to withstand this, or can lower ratings, such as 10A be used. Thanks in advance.

Question by The Skinnerz   |  last reply


how to choose the proper power supply to ESC? Answered

Hello , it's my first time posting here and i hope i have help i have a brushless motor with ESC rated as 30 A max i tried to connect it to a 12V- 125 A power supply but the ESC was burnt i wonder why did this happen ? i was told that the ESC will take the current it needs from the power supply and there are no problem to connect them together can anyone explain what happened to me?

Question by mmokhtar2   |  last reply


Do brushless motors produce electricity?

 I built a bike generator. My science teacher recommended installing a brushless motor instead of my brushed one. 

Question by TOCO   |  last reply


single phase ,brushless direct current motor.

Does anyone have the schematics for a VERY SIMPLE, (LIKE ME) single phase brushless DC motor.

Question by ianrbell   |  last reply


Brushless motor not running,help needed..!!!

I have Turnigy 2836, 2350Kv outrunner connected to Hobbyking 40A SBEC ,Rhino 1550mAh 3S 20c Lipoly Battery and a Hobbyking servo tester to control the motor .when i try to start it makes two beep sound, vibrates and turns off.it was perfectly running last time i checked .which components' fault is this??? and how to check lipoly's voltage and current?can i use normal multimeter? thanks for the suggestion....

Question by ferraririder123   |  last reply


Would this brushless motor produce electricity? Answered

 I made a bike generator but the brushes went out. Would this motor produce electricity? I will put it in some sort of protective housing. So here is the link.

Question by TOCO   |  last reply


Variable speed on a 5v brushless fan

Hi everyone! I have a 5v DC (0,15A, 50mm x 15mm) computer brushless fan that I want to power with a battery pack (4x AA rechargeables= 4,8v) or the MightyMinty Boost. This small blower is meant to be a part of a woodgas stove, and will bring air to the fire through a small duct. I'm looking for a circuit that would allow me to control the speed of the fan and the airflow. Kinda like a dimmer switch. Is there a readily available switch or devices that I could plug between the batteries and the fan? I guess the RC guys out there know a few thing about variable speed controller. I'm a newbie at this; I don't what to build a circuit from scratch, unless it's really simple. Thanks

Topic by jemor143   |  last reply


How do you control the speed of an AC BRUSHLESS motor? (Used on a scroll saw)?

I have a small scroll saw i would like to build a cheap speed controler for It uses an AC motor which appears to be brushless when i dismantled it Could anyone tell me how brushless AC motors work, and how their speeed controlers work (i assume you need to change the phase of the ac current) Many thanks Chris

Question by ooda55   |  last reply


Can someone walk me through the math of not exploding a 12V rated motor with a 48V battery?

I have a machine with a 12V motor. I have a battery that supplies 48V. I want to run the machine with the battery and NOT have the machine explode.If I get a speed control that can handle 48V, is it a simple as making sure I don't run it higher than 25%?

Question by jongscx   |  last reply


would this motor produce electricity? Answered

I made a bike generator and I want to add a brushless motor to it so I wont need to replace it or the brushes. I am looking at the brushless motor at this link.

Question by TOCO   |  last reply




What to do with a brushless PC cooling fan?

I am making a mini solder extractor fume thing like the legendary kipkay www.youtube.com/watch and i bought all the parts yesterday. however when i opened up the fan box it was a brushless one. I needed a brushed one though... How do i hook the brushless one up and what else do i need?

Question by ossiegoldhill   |  last reply



how is ac current generated? Answered

Ok, so I was under the impression that brushless motors were AC motors (and therefore conducted AC current), until recent internet searches proved me wrong. I am curious how AC current is conducted, is it conducted using brushless motors? Or is it a different type of motor that will generate such electricity?

Question by A-Nony-Mus   |  last reply


Motors, time and boredom

I have been collecting motors for a while now, and have no idea what to do with them. They range from 5-12VDC, brushed, brushless, stepper, etc. Any potential ideas for projects would be appreciated.  Thanks!

Topic by dansassin   |  last reply


What fan can I replace this one with?

I've just took apart my noisy micro refrigerator, it's an insulin cooler that keeps medicine at a temperature of 2-8 degrees celsius. It's good apart from the noisy fans. Now I was confused when I took it apart as I'd never heard of a DC brushless fan before. So I'm now wondering what can I replace it with? Can I replace it with a standard fan that's the same size as it? Or do I have to replace it with another DC brushless fan of the same specs? I want to find a near silent replacement, will this be possible? Is it the fan that actually makes the noise? Here's a few pics of the fan and motherboard: http://oi61.tinypic.com/o8ij52.jpg http://oi62.tinypic.com/14dezqx.jpg Thanks, really appreciate any help.

Question by Tickles14   |  last reply


whats the best motor and ESC to use for a high torque r/c tank?

I am currently building an r/c tank, but i am having trouble finding a suitable motor and ESC that will allow it to go realy fast ( high speed tank). all i can find are brushless motors that require 30A at 6-12v, the same goes for the esc's, and i have no idea were to get that sort of power as i only have access to a 9.6v 750ma battery but i can get sealed, lead-acid batteries, at around 12v and 3amps, but thats still nowhere near what i need. does anyone know where i can get a brushless motor that can have at least 30kg of torque @ at least 1500rpm, that can run off 1A 9V?

Question by oldmanbeefjerky   |  last reply


What choice of motor for a robot

Hello, I'm making researches about electric motors, I know very little about them and it seems to be a vast world. I don't have any detailled project yet, but I'd like to make a small robot that would be capable to move, that implies using electric motors. Forums have many useful data about them, but what it lacks is precise user reviews: what type of motor would you use the most, and why? Is it simpler to use servomotors over DC, or brushless? Prics must be a criteria of choice, but can I found cheap motors with good performance? Thank you very much for your help

Topic by armandbon   |  last reply


airborne Micro generator from nitro rc 40 motor / 400kv outrunner / smart charger / lipoly

Concept : design onboard lipoly charger system to extend flight time on giant scale electric plane.  1) if this is even a worth while project, the trade off of course is weight / power ,      can enough be created from a micro generator to make a differance, or would additionals 6 cell lipoy be more sensible ,  configuration =   OS max 40 nitro motor /  brushless 400 kv outrunner / ac / dc conversion rectifier / dc voltage regulator / 12v dc lipoly balance charger to main bank of lipoly batteries /  motors 2) I don't know how to build the rectifier bridge, so I would need some direction  Any suggestions or thoughts on this project are appreciated.  Jeff

Topic by JeffR135 


How can you tell if a motor is brushed, brushless, or a stepper?

I am trying to buy speed control but being that this is my first time building a battle bot when i bought the motors i just bought some motors off of ebay. Unaware, that there was much more to this aspect of the bot. Thank you in advance.

Question by DaNerd11   |  last reply


can i make a simple brushless motor controller? 12v pc cooling fan with a red, white and black wire. cant make it run!

Hi I need help with a pc cooling fan. i know its brushless and has 3 wires but i dont have a clue what driver/controller i need to make it run. help

Question by    |  last reply


V-22 osprey tilt rotor aircraft model

Hi i'm new to rc planes and drones so im making a model of v22 osprey tilt rotor aircraft i'm using the following components Arduino Mega 2x 2217/6 2300 kv brushless motor 6x micro servo for surface area control 2.4 ghz tx/rx fsct6b 6dof for stabilization i need help in controlling the bldc motors and servo by arduino mega using the 2.4 ghz tx/rx 

Topic by Daveluv1   |  last reply


Getting an ESC to work with arduino

Hello every one, I need to know if its possible to communicate between an ESC and an arduino. I would like to use a tilt sensor measured by the arduino to control a brush-less motor through an ESC. I'm not sure if this is possible but if so what would be a good way to go about doing it? Thanks for any help

Topic by Daniel Quintana   |  last reply


micro alternator airborne / out runner balance charger for large scale rc aircraft

Using the same concept as diesel trains. As they drive / pull on electric. The drive train is actually electric . The noise we hear are the generators charging the power banks. . Electric are far more efficient than diesel or gas engine direct  to the drive train. That being said. How can we set up micro scale generator on board 1/3 scale electric rc airplane. concept : connect 40 size os max rc nitro engine direct to 700 kv E. out runner shaft , rectifier bridge /  12 volt SMART lipoly charger, all this to enhance primary lipoy bank on large scale electric rc planes. ( increase flight time dramatically) sounds stupid I guess, but the concept apparently works in real world cargo trains. Can anyone help wth the system set up of rectifier bridge components to give this a shot ? I have no electrical expertise.  Thanks Jeff

Topic by JeffR135 


Motors for Quadcopters

Hi, I am looking to make a quadcopter as my university project and I kinda run in to some problems deciding which motor I need to choose. I was thinking to choose brushless motors as they are more efficient and they give more RPM. HOwever, my professor says that there's no point using brushless/stepper motors as u can get the same RPMs using brushed motors and its the same thing. Hence, can anyone please guide me which motor is best to use and why should I use brushed or brushless motors. I shall be very glad if someone guide me through it. Thank you :)

Topic by Bam Boy   |  last reply


Hard drive spindle motor repurposing

I am in the materials-gathering phase of a planned project to build a handheld stabilizer system for use with my dSLR camera when I shoot video (for an example of what that kind of is and does, look http://freeflysystems.com/products/movi/m10/).  I have a number of older or decommissioned hard drives and optical drives laying around and wondered if I couldn't repurpose the motors from them to use as the axis motors for my stabilizer.  The SimpleBGC board from Alexmos is built to drive brushless DC motors such as the spindle motors found in hard drives.  My questions would be if this would work and whether they would be "strong" enough to turn and hold the camera carriage according to the controller's signals.

Topic by brian.ragle.1   |  last reply


Does anyone know how to convert the three phase output from a brushless motor/generator into straight DC voltage?

I would like to pedal the brushless motor/generator to drive a propeller powered by the resulting voltage Thank You?

Question by adamalbert   |  last reply


E-Bike motor selection, would it work? Answered

Im thinking of building an ebike, but unfortanately im stuck at the motor selection. I was just thinking, if you use 250W brushed motors for them, can this motor be used... If yes , just how to use it for a chain drive E-Bike? Any help will be greatly appreciated.

Question by robobot3112   |  last reply


dc to dc step up converter for 22v 6 cell lipo to get to 44 volt , need advice

Im building a power harness for my hang glider, the project is very near completion, my brushless out runners require 44 to 48 volts. I am using two sets of 22v 6s in series, but the weight of two large 6s batteries banks is significant , what would be the potential to create this step up converter and what are the down side of designing dc to dc step up converter into my power system. My hope to eliminate the in series battery ( double battery  weight ) set up.  I suspect loss of amps or total run time ? what about problems with electronics  heat in the circuit, issues with ticky speed controllers, or the out runners , how will they be effected , or will these components work normally in a step up voltage / current  as compared  batteries in series. ( which is working beautifully ) I guess volts are volts, it just sounds to good to be true , double volts and less battery weight Any and all qualified opinion and advice is appreciated.  Thanks Jeff

Question by JeffR135   |  last reply


How do i increase the speed of an electric bike?(Motor in hub)

I know you need to increase the power going into the motor. I don't understand exactly how? I know that a different battery with higher voltage output should work, but is there any other way? If so, how and what would I need? I trust that you guys can come up with something. P.S I am aware of the potential danger of the motor if I increase too much.

Question by ClaynEva   |  last reply


How do I make circuit schematics for quadcopter?

I have made a quadcopter using ESCs, brushless motors, Arduino UNO, MPU6050 and a battery. Now I want to design its schematics. But I dnt know which software to use to do that. I have tried to use fritzing, but its doeenst give me any components for brushless motors or ESCs. So can anyone suggest me a good software used to make schematics for quadcopter?

Question by Bam Boy   |  last reply


how can we power up brushless motor from broken hdd?

I have a couple of broken hdd from dekstop or laptop.I've remove the magnet for other thing,but i can not find a "simple" way to use the spindle motor for something usefull...thanks....

Question by annurro   |  last reply


How can I hook up a VCR video drum motor to a microcontroller or other power source, without the big VCR circuit board? Answered

It is not a DC motor, I think it is a brushless motor. It's the big round one that moves the the tape.

Question by -henry-   |  last reply