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Questions tagged [brushless-motor]

Brushless motor is kind of DC motor. It is also called BLDC Motors (Brush-Less Direct Current Motors).

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Vertically moving robot

I want to build a 4WD robot that can travel vertically by pushing against opposite rails. The wheels push against the rails and generate friction, the robot moves upwards as the wheels rotate. This is ...
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1answer
46 views

State Space Model of Brushless DC

I am working on a project in which I want to use State Feedback Control to position control a BLDC motor in combination with a motor controller. I want to do this since translating time domain ...
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1answer
34 views

DJI E310 Thrust Coefficient

I am reading Denis M. Filatov et al.'s paper "Parameters identification of thrust generation subsystem for small unmanned aerial vehicles" (https://www.semanticscholar.org/paper/Parameters-...
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28 views

Sensored BLDC motor (sometimes) needs push to get started

I'm having a sensored BLDC motor (12V version though) connected to a suitable motor controller and powered through a 25A regulated power supply With an Arduino I'm able to control the motor just fine. ...
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26 views

What are the considerations when using a sensorless driver

I am planning to build a quadrocopter and consider using BLDC motors. For some of these motors dedicated discrete drivers are available, but they come very expensive. On the other hand, there are ...
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1answer
61 views

Doing a project for college for a manned drone theortically only

Weight of the Drone in total will be 240 Kg. It Will be a quad copter drone setup but with 8 rotors(two on each corner) for redundancy purpose. Aim is achieve Thrust/weight ratio of 2. So need total ...
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1answer
224 views

brushless motor as a servo

I would like to use(or control) a gimbal brushless motor like a servo meaning I want to control position not rotation speed. The position must be from 0 to 180 and 0 to -180 I will use an Arduino ...
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0answers
97 views

How does one setup an ESC to drive a wheel-hub motor?

I have 2x 350W wheel-hub motors taken from a self-balancing scooter, or hoverboard. My intention is to use the two of them to drive a homemade R2-D2. However, some difficulties have been encountered ...
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399 views

DC geared Motor 20 NM 25 RPM small dimensions. [closed]

My application requires a DC geared motor with torque of 10 NM - 20 NM and low speed (25 RPM at most) and a small dimensions (120 mm length at most). I failed to find my specs at eBay, and Alibaba ...
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1answer
1k views

Using brushless motors for very high torque

I'm currently building an robotic arm and I want the elbow joint to be comparable to a human one But here's the problem, electric linear actuators are too slow and have low torque, same goes with ...
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3answers
487 views

Is a larger Kv equivalent to more voltage?

I've been a fan of first person view drone Racing for years now and, in thinking of building a new quadcopter, I have a question I'm unable to resolve myself. Please correct me if I'm wrong: As i ...
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1answer
134 views

What is the typical weight distribution for a brushless motor?

Brushless motors, like regular motors, have different parts (commutator, stater, etc). What do these various parts weigh?
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1answer
49 views

Why the bldc motor not able to move my water boat?

I have a 1100kv brushless motor from dys with a propeller as shown. I have attached this motor to two pvc pipes joined together as shown and packed the electronics inside polyform to protect from ...
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1answer
56 views

Confirm my understanding on BLDC motors

This question assumes an ideal system with 100% efficiency. Lets say I have this propeller which if spun at 1000 RPM in water will need a 48 Watt motor to drive it. So I get a 1000 Kv 16V motor and ...
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2answers
428 views

Motor for DIY Electric skateboard

I've been planning to make an electric skateboard for a while now. All the tutorials that I have seen use brushless motors. However, where I live, its not possible to get the exact ones as shown in ...
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1answer
227 views

Brushless DC motor problems at high velocities

For a project we use a brushless DC (BLDC) motor. Everything works fine until we tried to reach high velocities. I will first explain my setup, and than explain our problems using some graphs. 1.0 ...
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2answers
502 views

Explanation of Quadcopter Dynamics, Components and Control

I am about to build my own quadcopter from scratch. However i am having problem with understanding how it is possible to control the quadcopter without knowing the current rpm of the BLDC motors. ...
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2answers
667 views

Driving sensorless three phase BLDC motor with Arduino and IMU

I have started to work on a little project of mines, which consists in implementing the stabilization a single axis gimbal using Arduino. The gimbal is driven by a sensorless three phase brushless DC ...
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2answers
260 views

What are some ways to estimate torque/load on a robotic arm joint

My main problem is measuring joint torque/load economically. There are ways to detect the electric current drawn which is proportional to the torque. Since my motor is a BLDC motor, there will be a ...
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1answer
92 views

Mounting a gimbal BLDC motor [closed]

I'm trying to build my own motorised camera gimbal using a BLDC like this, where the shaft is hollow. Does anyone know how the camera platform should be mounted? Should a shaft be somehow pressed into ...
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1answer
105 views

Bldc motors erratic behavior with Arduino program

I've been making my own quadcopter flight controller using Arduino Mega. This is the sample code I wrote in order to test the esc timers and motors: ...
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1answer
3k views

How to find Friction or Viscous force b (nmsec) in DC motor

PLease guide me How to find Friction or Viscous force b (nmsec) in DC motor for a particlar speed. The motor is connected with a gear and the ration is 26:1 I want to find for 200 rpm and the motor ...
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2answers
431 views

Brushless motor from RC car won't spin with even small resistance

I recently bought a RC car kit and after 10 minutes it stopped going. When I throttle, I can see the motor trying to spin but it will just grind and get hot quite fast. The motor does move if I ...
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1answer
69 views

Motor upgrade to higher torque?

I have assembled a 4WD car using kits I bought on ebay. I have 4 motors similar to this one: . The description says: Operating voltage: 3V~12VDC (recommended operating voltage of about 6 to ...
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4answers
2k views

Why does the ESC stop?

I've built a quadcopter with four brushless motors and ESCs (30A). I'm using an Arduino to control them. I haven't written any complex code; just enough to get them running. Everything is fine until I ...
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2answers
3k views

Can i use DC Brushed motors for building a drone? [closed]

I want to make a drone. But my budget is very low. Brushless motors are very expensive. I want use the Brushed CHEAP ones. can i us them ?
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718 views

Arduino project: Turning with a fixed front wheel axis

I am working on an Arduino robot project. This project requires a base with 4 wheels where the back wheels are attached to two DC motors that can be controlled independently of each other. I am ...
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1answer
957 views

How do I if know my quad is powerful enough to take off vertically smoothly and how do I calculate max Thrust(g) for given current(A) and voltage(V)?

If I build my quadcopter with the following components, will it take off vertically smoothly? Frame: F450 glass fiber and polyamide nylon [280g] Landing Gear: High Landing Gear for F450 [90g] ...
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0answers
100 views

Which brushless dc and propeller to choose?

I have a small bot(around 4-5kg with wheels) which is to be pushed without contact by another bot. I plan to do this using a bru and a propeller. I am having problems selecting the right combination. ...
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1answer
438 views

Torque / Current control for BLDC motors

I am working on a robotic application, and I want to control the torque (or current) of brushless DC motors. There are many BLDC speed controllers but I could not find anything related to torque or ...
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2answers
4k views

How to calculate the current consumed by a brushless motor on a quadcopter

I want to create a virtual quadcopter model, but I am struggling to come up with a satisfying model for the brushless motors & props. Let's take an example, based on the great eCalc tool: Let's ...
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1answer
378 views

How to use specific ESC,BLDC motor through Arduino Uno R3?

Attempt to clean up: I'm trying to use this motor with this ESC and an Arduino Uno R3. Typically, I used the PWM pins when I use the Arduino and an ESC, but I can't control the motor even if I use ...
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1answer
619 views

EMAX ESC Simon Series with arduino

I want to control a brushless motor with the "EMAX Simon Series 30amp ESC" and Arduino (Leonardo) board. I am really confused how to do that. I can't understand which beep sounds mean what. I have ...
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2answers
162 views

thrust measurement

I try to find out the relation between rpm vs. thrust for a battery+motor+propeller combination. the image shows my setup and also the measurement result. Can anyone explain how l should use this ...
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2answers
612 views

Voltage rpm relation

I measure the voltage ESC drawing while increasing the dc motor speed. Multimeter shows that as long as the speed increases the voltage value decreases. Can anybody explain why this is happening?
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1answer
1k views

Brushless DC motor - Electronic Speed Control - Quadcopter

I'm a student who is doing electrical and electronics engineering. I'm currently doing my final project which is a quadcopter. One of my objectives in that is to make a Electronic Speed Controller (...
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1answer
1k views

Highspeed with gearbox or low speed for brushless motor?

I'm attempting to control a small vehicle at relatively slow (.5 m/s - 1 m/s) speeds, but with extreme accuracy (1mm). For the drive system, I'm considering using brushless motors as they have a much ...
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1answer
57 views

Is this rubber/PVC coupling a good enough for small torque (0.1 N.m)

I am working on a project that involves speed regulation of a BLDC motor under no-load and load conditions. I wish to use another machine operated as generator, acting as load on the motor, as shown ...
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2answers
2k views

An easy way to exert desired load on a motor shaft?

I am trying to exert a desired load of 0.07 N.m on a BLDC motor shaft whose length is 0.750in and diameter is 0.3125in (0.008m). I can go to a machine shop and get a small adjustable cylindrical ...
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1answer
1k views

How to control Brushless Motor+ESC with BeagleBone?

I can't really find a real straightforward tutorial for that. There are a lot for Arduino but I only have an original beaglebone, an ESC, and brushless motor with me. Please help.
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1answer
189 views

Quadcopter Propeller size + Motor

i would like to build quad that uses bigger propellers like 15" . My question is what kind of motor shall i use ? Low or high KV? Do all motors support this kind of propellers ? Will they burn because ...
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1answer
175 views

Controlling an ESC for Brushless Motors with an RPi

I'm looking to build a new (first) quadcopter without the conventional flight controller and radio, with an onboard RPi and applying some newfound knowledge on autonomous control to improve my coding ...
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0answers
214 views

Is motor current proportional to thrust?

So I was making sure my circuit for an airboat I was working on was safe. And checking a motor, it has 35 amps max current running 11.1v at 1000. (However my ESC has a 30 current, 40 burst amps). ...
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1answer
2k views

Can I use a PWM HHO Controller to control a brushless DC motor?

I'm an electronics newbie. The part I'm talking about is this: DC 10-50v 12V 24V 48V 3000W 60A amps DC Motor Speed Control PWM HHO Controller My question is, ...
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1answer
86 views

What's the smallest rotation a brush-less motor can perform?

For example, I have a brush-less outrunner with 14 poles and 12 stator windings. It has three connectors. Can this motor be controlled in a way that it performs a single step of 30 degrees (360/12)?
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1answer
38 views

Creating an xbox remote that replaces spectrum dx3c or dx3e without wifi [closed]

Hello I'm a new rc enthusiast, Is anyone interested in rc's controlled through xbox remotes? The project is to use an xbox one or xbox 360 remote to either hijack a dx3e or dx3c remote or create a ...
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2answers
312 views

Nano sized electric motors

What is a good website for buying 1.5V continuous motors? I'm looking to build a clockwork robot but I cannot find a motor small enough to fit inside my power box and I don't want to mount it outside ...
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2answers
175 views

Is there a brushless motor controller accepting over 500 updates/s?

I want to use brushless for my line follower. The problem is most ESCs don't accept more than 400-500 updates/s due to the characteristic of steering signal. Is there a way to overcome this with a ...
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3answers
449 views

Sun tracking with +/- 0.1degree accuracy?

For a school project I am looking to track the sun with +/- 0.1 degree accuracy for use with a parabolic dish reflector. Say we need a final output torque of about 20Nm, what kind of gearing/motors ...
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2answers
1k views

Self-locking actuator: Friction versus worm gear

I am planning to control my bicycle derailleur with an electronic circuit, the advantages being multiple but not topic of this question. The actuation would be performed by placing the assembly very ...