Questions tagged [brushless-motors]

Use for questions regarding brushless DC motors.

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Which DC motors (or others) are good enough for my multi-function drone?

I am planning to make own drone which flies and dives (Some servo motors used to change between fly and dive-mode). But is a normal DC motor or a micro motor good enough (It flies and dives under tens ...
NearEternal's user avatar
-1 votes
1 answer
52 views

Brushless motor runs for 10 seconds and shuts down

I armed the ESC and set the throttle and the motor spins up for about 10 seconds. However, it is slow and then shuts down. After turning the throttle back down and then back up the motor starts again. ...
Debbie Baggett's user avatar
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0 answers
20 views

Nitro to Electric Conversion

Attempting to convert a ThunderTiger Ready MkIII nitro to electric. Manufacturer recommended engines are: Thunder Tiger Aircraft Engine GP-42: 1.10 BHP @ 14,000 RPM, 357.2 g / 12.60 oz., 6.90 c.c. / ....
Vectorizer's user avatar
0 votes
0 answers
13 views

Brushless Motor no datasheets available

Currently I‘m searching for the right motor. I really have problems with this because there are no datasheets for the motors I inspect. Is there a central database for motor datasets or something like ...
dontoronto's user avatar
0 votes
1 answer
49 views

How much current can float through all pads of the PDB (Power distribution board)?

I want to buy the „PDB-HEX, 12S“ Power Distribution Board. Are the current values of PDB/current sense resistor and ESC power pads meant for the summarized current of all motors or for each Motor? Why ...
dontoronto's user avatar
0 votes
1 answer
131 views

Using a raspberry pi 4 for motor control

I am fairly new to electronics and am trying to build a drone from scratch as a hobby project. I want a setup where I can control all the motors individually through the software. Through some ...
ArjunSahlot's user avatar
1 vote
1 answer
61 views

LiPo battery voltage keeps dropping when connected to PDB

I have an F450 quadcopter frame with the integrated Power Distribution Board. In order to use this feature, I soldered the battery (XT60) and the four ESC (Dean-T) connectors. I tested the continuity ...
Teo Protoulis's user avatar
0 votes
2 answers
179 views

A2212 1000kv Brushless motor keep beeping and twitching

I have bought an A2212 1000Kv brushless motor and a 30A ESC. I power this setup with a 7.4v 2s 30c 800mah LiPo battery. For the signal, I am using a DIY Arduino receiver and transmitter. When I test ...
cool bean's user avatar
2 votes
1 answer
51 views

How do I find the current my motor and speed controller will draw?

I am currently building an rc aircraft. I need to achieve approximately 20 minutes of flight time. I'm using a 1600w 320kv motor and a 80A speed controller. For 20 minutes of flight time at 80 draw I ...
cael gallagher's user avatar
1 vote
1 answer
387 views

What battery can I use for 1000kv brushless motor, that will be the cheapest?

I am using a 10 x 4.5 propeller for my A2212/13T 1000KV brushless motor with a 30A ESC. What battery will I need that will be cheap to power my motor alongside three 9-gram servos? Flight time is not ...
cool bean's user avatar
0 votes
1 answer
54 views

Why wont my 1000kv brushless motor work with a 10x4.5 propeller?

When I run my A2212/13T 1000Kv brushless motor by itself with 11.1 or 7.4 volts(i am using 2 lipo 3.7volts 900mah and a li-ion 3.7v 900mah in series that I connected with alligator clips) it runs fine....
cool bean's user avatar
0 votes
1 answer
69 views

Can I put lipo and li-ion batteries in series

I have two 3.7 volt 900 mAh LiPo battery, which I connected in series to provide 7.4 volts. But now I want 11.1 volts. Instead of buying another LiPo battery, am I able to put these two LiPo batteries ...
cool bean's user avatar
2 votes
1 answer
555 views

How to choose the most efficient (thrust per watt) motor+propeller setup for a drone?

I'm designing a quadcopter weighing around 250 grams, while maintaining a thrust-to-weight ratio of 2:1 Optimize: Maximize the thrust-per-watt for the motor+propeller pair Constraints: weight of each ...
Pragy Agarwal's user avatar
1 vote
0 answers
50 views

Rain proofing a drone design - What about the motors?

I'm working with custom build autonomous drones. Recently, I've started thinking about making the design rain proof. There are a lot of waterproof RTF designs out there and SO also has a thread on ...
user3792852's user avatar
1 vote
1 answer
147 views

I have a design for powering four motors, could someone verify that it will work as I planned?

My question: This is a simple design that I have created using everything that I know about electronics so far. Is there anything missing in my design or are there any concepts which I have ...
Sanchez2009's user avatar
1 vote
2 answers
360 views

How to maximize range with 2212 1400Kv motor and 30A ESC?

Premise, I'm not interested in speed or any type of sporty flight attitude, but only on range maximization I have 30A ESC, 2212 1400Kv motors 180W max with maximum efficiency current in the range ...
AndreaF's user avatar
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1 answer
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Generic Brushless motors equivalence for calculations with ecalc

The ecalc website is very useful to do estimations for models, however I haven't found how to choose correctly the motor options for generic brushless motors like these In motor choice option there ...
AndreaF's user avatar
  • 225
2 votes
1 answer
169 views

Can I use a 1.5 amp 5v or 12v supply to power the esc and cd rom brushless motor?

I'm new here on the site, and I want to start the cd rom motor you see in the image below: but can i use a 1.5amp 5v or 12v supply to power the esc and start the cd rom brushless motor? the source of ...
Math031's user avatar
  • 21
5 votes
2 answers
255 views

Will different brushless motor sizes work with the same flight controller and esc

I recently built a 5-inch quad using: Diatone Mamba F405 Mk2 F40 Mk2 3-6S 30x30 Stack/Combo (F4 FC / 40A 4in1 ESC) Motors: iFlight Xing-E PRO 2207 1800Kv Motor with DShot 600 and 4S battery cell. I ...
Spesemper's user avatar
2 votes
2 answers
473 views

Which propeller for these motors for rc airplane

I am new to this hobby and I am looking to make a rc airplane myself but I am confused to buy which propeller for this motor? Shall i buy CW or CCW propeller Thanks, Paarth
Paarth Katiyar's user avatar
4 votes
2 answers
342 views

Brushless Motor not spinning when controlling with Raspberry Pi, PWM and ESC

I'm currently working on a drone which is controlled by a Raspberry Pi. I try to control the motors by using PWM on the connected ESCs, which is described in many guides and forums. For that I use the ...
HexadiemsnionalerAlp's user avatar
5 votes
1 answer
74 views

What battery/motor setup will replace this 1980s vintage glow engine?

I have a sport model (RCM Terrier, balsa/plywood construction covered with Monokote or Econokote stick/shrink film) that I built in 1984, and it has somehow come through multiple moves apparently ...
Zeiss Ikon's user avatar
4 votes
1 answer
135 views

Choosing ESCs for an Autonomous Drone

I'm about to build my first drone. I chose the PixHawk 4 with PX4 as a flight controller and the Raspberry Pi Model 3B as the companion computer. I am not sure about the ESCs yet. So far I'm ...
H123321's user avatar
  • 81
4 votes
2 answers
410 views

How to limit the power of the brushless motor

I need to limit the power of my brushless motor at 700 Watts. How I can do it? I dont have a fix motor or propeller, for any configuration the max consumed power need to be less or equal 700W. The max ...
Arcaniaco's user avatar
  • 318
4 votes
1 answer
211 views

Lipo battery with an ESC and a BLDC motor

I'm not sure if I can connect four brushless dc motors to my Lipo battery. I don't know how to calculate it. The brushless motor I have is the Turnigy L2210C-1200 brushless motor (150w) and the Lipo ...
Isaac Varas Britto's user avatar
3 votes
1 answer
452 views

Can a BLDC motor meant for a multi-rotor be used for a fixed-wing aircraft?

I am designing a propulsion system for a fixed wing aircraft (RC plane). I have found a motor that meets all the requirements of my fixed wing aircraft. But the motor was for a multi rotor. Can we use ...
Anshuman Phadke's user avatar
2 votes
2 answers
345 views

Brushless Motor Acting Weird

I recently got a brushless motor upgrade set for my RC car (I have previously asked questions about it), and there seems to be something wrong with it... The steering servo works fine. The brushless ...
Jacob Hornbeck's user avatar
4 votes
1 answer
153 views

Brushless Motor/ESC Voltage Cut-off

I got an ESC and brushless motor set for my RC car. After I finally got it to work, I put my car back together, but then when I turn on the transmitter and then the ESC, the motor emits a "beep&...
Jacob Hornbeck's user avatar
4 votes
2 answers
125 views

Lift off without receiver

Can I make a small drone frame achieve lift using 4 coreless 3.7 v motors of 55000 rpm, 3.7 v lipo batteries having 40c without a receiver and remote. Motors are all alike. The propellers I have are ...
Raster R's user avatar
  • 381
2 votes
1 answer
87 views

quadcopter motor spinning with resistance and not as freely as other motors

I haven't completed the assembly of my quad but I noticed one of the motors was not spinning as freely as the other 3. It seems like the top spinning part is scraping against the bottom fixed plate ...
Ahmed Anwer's user avatar
5 votes
2 answers
132 views

Brushless Upgrade for RC Car

I was told that if my question was about motors and ESCs than it would be okay to put it on here even though it has to do with an RC car... I am wanting to do a brushless upgrade for my WLTOYS 12428 ...
Jacob Hornbeck's user avatar
5 votes
2 answers
158 views

How can I increase the lifting power?

I understand the concept of lower KV bigger prop to increase the lifting capacity. But sometime that is not possible if your drone frame is just so big. For example I have a S550 I like to increase ...
Joseph Lim's user avatar
2 votes
1 answer
83 views

How to connect Opto esc to BLDC Motor

I'm using 30A Opto 2-4s LIPo Blheli-S ESC for my drone. And I'm currently confused about how to connect the BLDC motor to the ESC. I found nothing online that currently explains the type of ...
Venkatesh Talacheeru's user avatar
3 votes
1 answer
358 views

All motors vibrating but not spinning?

I made a 3D-printed drone body and attached some MT2204-2300kv brushless motors. I have the standard yellow 30A ESC for each of the 4 motors. I also have an Arduino Uno running YMFC-AL and a FlySky FS-...
DragonflyRobotics's user avatar
7 votes
2 answers
127 views

One of my motor don't turn if throttle is raised too rapidly

I've recently have an issue with my quad. One of my motor don't spin if I raise throttle too rapidly. If i raised it slowly i the motor turn correctly. Only one of my motor have this issue and i've ...
Ruokki's user avatar
  • 191
5 votes
1 answer
333 views

ESC shutting down when motor loaded

I have a BLDC motor and a 300 amp ESC, The ESC shuts down after a few seconds at full load. The motor only draws 2 amps at full throttle, full load and the voltage only drops .5 volts. The battery is ...
edrummer's user avatar
3 votes
0 answers
69 views

BLDC Motors not spinning at commanded RPM

I have a F450 Quadcopter frame with BLDC motors of 1000Kv and ESC (simonk) 30A each. I am trying to verify if the bldc motor rpm output at a commanded rpm is same as commanded rpm. I am using ...
TheLazy's user avatar
  • 451
6 votes
1 answer
139 views

Help finding ESC for brushless motor

I'm very very new to hobby electronics however I have studied a bit about basic electronics in school. I have four EMAX 0802 Brushless Motors and I want to drive them with an Arduino Nano. I know that ...
James McGreivy's user avatar
3 votes
1 answer
62 views

Vibrating like a jelly when takeoff

I have Kotleta 20 UAVCAN ESCs. When I trying to increase throttle, motors are vibrating like a jelly. How can I configure my ESCs via development port? What are best options for non vibrated flight? ...
Furkan Mola's user avatar
4 votes
1 answer
391 views

How tight should the screws at the bottom of the motor shaft be?

As I was replacing a shaft screw on a motor, I thought I'd check the other motor shaft screws. I noticed that none of them were tight, so I tightened them. As a result, the drone flew horribly. So ...
Schome1's user avatar
  • 1,226
4 votes
2 answers
180 views

How to secure the screw on a BLDC motor shaft

I lost the screw that holds the motor bell to the base of the motor. I replaced it and flew, but it came loose and I lost it again. I used blue thread lock to secure it. Do I need to use red thread ...
Schome1's user avatar
  • 1,226
8 votes
1 answer
799 views

What is this ring attached to the bottom of this rotor shaft?

My motor came with a black ring attached to the bottom of the rotor. It spins along with the rotor, and it's not exactly a ring shape since it's open at one end - kind of like an omega symbol or like ...
Mark's user avatar
  • 183
8 votes
1 answer
118 views

Is there a method to wire a brushless motor to an ESC so it spins in the required direction first time?

So I know that three phase motors will reverse direction when 2 wires are swapped round, or that the direction can be changed in software (such as BLHeli). But is there a method to get it right first ...
RJBulger's user avatar
2 votes
1 answer
77 views

Recommendations for a BLDC motor and battery for a 28x20 propeller?

I'm looking for a motor and battery set up that can last for over an hour and spin the propeller at 6000+ rpm. The propeller is a 28x20 single blade being connected to a second blade for a total of 56 ...
Gabriel Kusiak's user avatar
11 votes
1 answer
3k views

What do the numbers mean on a brushless DC motor?

Brushless DC (BLDC) motors can have a range of numbers on them: A four-digit number (e.g. 2212) A Kv number (already explained on this site) A number with N and P (e.g 12N14P) What do they mean?
Kralc's user avatar
  • 6,026
7 votes
1 answer
173 views

How can I run 2207 2450Kv motors on 4S with 7” props?

I’m looking to use some spare motors I have to build a 7” rig. The problem is that they are 2450Kv, and I don’t want to burn out my other components. As I understand it, if I set a motor output limit ...
Drones and Whatnot's user avatar
7 votes
1 answer
1k views

Grinding sound on FPV motor but no apparent damage

I have been testing a new brushless motor for an RC plane. It is a 2200KV motor controlled by a 30A BLDC ESC. I heard a grinding noise coming from my motor, as demonstrated in the following video: ...
frc_contributor's user avatar
5 votes
2 answers
108 views

Does motor KV requirement scale linearly with voltage?

There have been myriad questions regarding motor KV, such as this one. Many of these come close to answering my question, however none have given me a definite answer. If I am picking motors for a ...
Drones and Whatnot's user avatar
5 votes
1 answer
178 views

How to clean dirt out of my miniquad motors?

I accidentally crashed my 250 class quadcopter into the dirt today and got dirt all over it, including into the motors. I managed to clean the dirt off of the frame and electronics, but I have no idea ...
ifconfig's user avatar
  • 5,958
7 votes
1 answer
328 views

Does frequently changing the amount of power to a bldc motor wear it out?

If you had a brushless dc motor and kept it running but changing the power input every few seconds/minutes would it wear it out? I ask because for a drone like aircraft I'm designing, making turns ...
Gabriel Kusiak's user avatar