Questions tagged [brushless-dc-motor]

A brushless DC electric motor is a DC motor type that uses an electronic inverter/switching circuit to energize the motor coils in a sequence (based on the detected rotor position) in order to rotate the motor.

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How do you know which pin corresponds hall sensor 1, 2, and 3 so that I can pair it with the correct phase wire in a bldc motor

I recently bought a brushless sensored dc motor on Amazon which you can find here. I didn't really know what I was doing at the time when I bought this motor, but now i'm realizing it might have been ...
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How do MOSFETs in 300-500A ESCs handle the current?

I’m trying to build an elecyronic speed control (ESC) for a boat that requires a massive amount of continuous current flow. I’m trying to also design the ESC my self. I need to supply 50 V and 300 A ...
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Is it feasible, and practical to convert a salvaged brushed dc rotor lamination stack to a BLDC outrunner?

I have a salvaged brushed dc inrunner rotor (stack of silicon steel laminations w 12 poles). Is there any reason I can't rewind the (former) dc rotor as a stator, fabricate an outrunner rotor "...
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Can you use a DC brushless motor as a torque motor?

I've got an outrunner brushless DC motor (Flipsky 63100 190KV 5500W if that's relevant). It'll be used to spin normally sometimes, but I also need it at other times to give resistance to motion. ...
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Need help running a BLDC motor using IMC302AF064XUMA1 controller from infineon

The IMC302AF064XUMA1 controller from infineon uses GUI based parameter entry to run a motor instead of coding. I have input all the known motor values. However, when I try to start the motor, it just ...
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How to calculate the revolutions of BLDC motor?

A brushless DC motor is rotating at 5000 rpm and is fitted with 3 hall effect sensors. The microcontroller interfaced with the brushless motor has a clock speed of 2 KHz and is configured to trigger ...
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If a motor driver IC has shoot-through protection does the controller need to add deadtime?

I'm designing a motor driver and controller system for an E-Bike, and I'm currently using the IRSM836-084MA. The datasheet mentions that it has "cross-conduction prevention logic", but to my ...
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How to Calculate Driver Input Current from 3-Phase Motor Data

I have a driver that is able to monitor the following motor parameters as functions of time: Reactive Current Active Current Phase Voltage (all 3) RMS Voltage The RPM is fixed and the I know the ...
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7 votes
4 answers
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Do I need back EMF protection for a small brushless cooling fan?

I am designing a PCB, and I want to add cooling to the project. To accomplish this I have added a connector for small (40mm x 40mm) brushless cooling fan that will draw off an existing 12V supply from ...
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ESC Brushless Motor Lipo Battery

I have purchased DC 12V 83.3A 1000W Power Supply and it powers 4 brushless motors A2212 1400KV Brushless Motor. I have checked the Motors and they require 11.1 V and Load Current: 19.0A Power:210W. ...
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Weird comparison between MOSFETs for ESC

I am designing an ESC (electronic speed controller) for a BLDC motor which is 3500W, 85A and 44V. The first thing is to choose the MOSFET, which should be easy. I first found the IRFS7534, which has a ...
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Controlling BLDC motor with Arduino UNO

I've been working on a project for controlling a BLDC motor using Arduino to send control signals to an ESC, which then will control the motor speed. I'm doing this so that I can test the thrust and ...
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Choosing a motor

Long time listener, first time caller etc! Also, if you think this could be better answered somewhere else please let me know. I'm building a pottery wheel at the moment and I'm in a bit of a quandary ...
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Why does this ESC and BLDC Motor work together?

I have a BLDC motor, and I have an ESC to control it. These 2 are commonly bought together on Amazon. The ESC is rated at 50 Amps continuous with a max current of 150 Amps. I am confused how this BLDC ...
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How is it possible for GreatScott to use this MOSFET driver if it can only give 1.5 amps max?

I am trying to follow this tutorial by Greatscott. I don't understand how the TC4427 MOSFET driver he is using in this build works. I searched up the datasheet which can be found here. It says "...
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Problem with FOC current controller

I am working on BLDC motor FOC control. I am developing firmware based on VESC firmware, but I am having some problem with the Vq and Vd values that are supposed to be DC values. FOC Block diagram ...
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Low inductance high torque motors

Internal inductance of motor windings reduces the response time of motors. I was wondering if there exists a motor type which is both high torque and low inductance? Or in other words a motor which ...
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Current & BEMF Measurement with LP Filter - Determining Cut-Off Frequency

I am analyzing the BEMF and current sensing circuits of the ST Microelectronics demo board STEVAL-ESC001V1 as I am creating my own ESC based in part on this design. My application will use a 4S lipo ...
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BLDC motor driver failing when powered up

We are building a bar telepresence robot using two BLDC motors (scavenged from a hoverboard), two 500W motor drivers like this one and an Arduino that processes input from a RC receiver to deliver the ...
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Half-bridge driver IR2101 shorting high side and low side (In a weird condition)

I am making my own FOC BLDC driver, but there is a weird problem when I control the gate driver using PWM. I am using three IR2101 driver IC to drive the six N-FETs, and I am using an STM32 (Blue pill)...
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BLDC motor and bullet connectors getting hot

I am using the following components: Lemon RC 3S-2200mAh 25C/ 50C (burst) LiPo battery Readytosky 80A ESC DYS D2726-6 BLDC (2200kV BLDC motor) I am testing out the components with 1045 (10 in, 4.5 ...
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SVPWM control on a BLDC Motor: No-load current is too high

I'm having issues running SVPWM control on a 2 pole-pairs. I'm using a Micronas HVC4223F with a 12V motor Faulhauber 2232BX4 with integrated Hall sensors. My card's half-bridges have over-current ...
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LRK BLDC motor analysis

I was trying to do some simple calculations on PM BLDC motor as per this pdf, which was published on femm.info site. Given the widespread use of FEMM software and the reputation I believe what's ...
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BLDC Hall Sensor Angle Offset

I'm running a BLDC motor and I'm working on my own Software. I want to run the BLDC Motor with field oriented control, that's why I need a precise electrical angle. I'm using three hall sensors in the ...
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How to calculate torque constant and back EMF constant of a BLDC motor?

I have a BLDC motor to run for a fan. The parameters are as follows: Electrical frequency measured: 61.936 Hz Pole pairs: 8 Line voltage measured: 70.365 V RMS Line voltage peak: 99.51113732 ...
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Can the polarity of a 12V brushless CPU fan be reversed?

Can the polarity of standard CPU 12VDC brushless fan be reversed? For my application it is fine if the an is not broken afterwards. Please see the image of the an below:
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Flux in V/Hz to actual motor constant Ke?

I have some trouble to calculate the motor constant Ke in V/krpm from a known flux constant of the motor. The motor has a rated flux of 0.249V/Hz and 2 PP (pole pairs). I already know, that Ke is 9.8V/...
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Stand-alone ESC v.s. BLDC driver ICs, what's the difference?

I am designing a customized miniature drone for research and would like to embed the ESC for BLDC motor directly on board to save space and weight. I have searched a lot for ESC design online and can ...
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How to check for the specification of the motor to lift a certain weight? [duplicate]

I'm trying to figure out how much power, torque and rpm required for a motor to carry 2-3 kg (including his own weight). Also, the speed at which the weight is lifted doesn't really matter as much as ...
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Ground bounce over long cables

I'm working with a 72 V battery that is driving a brushless motor under fairly high current applications, approx. 60 A(rms). I am working to mitigate issues, I believe from ground bounce, that occur ...
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Calculate power output of 3 phase generator - uneven sine wave

I am using this BLDC motor [https://uav-en.tmotor.com/html/2018/navigato_0402/52.html] as a generator. The device providing the mechanical drive turns the motor about half a turn and not at a linear ...
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Gear reduction vs PWM duty cycle limiting

I am wondering about adjusting the output RPMs of wheels in vehicle. Lets assume two situations, in which we are using BLDC motor with ESC, where the PWM is our controlling signal. We have got gear ...
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Low Cost andd Urgent H Bridge Need?

I am Creating a H Bridge for 4 x 12V 5A BDC Motor with driving ESP32 Digital Output. Do I need any Components? because I Must be Small PCB design. (Maybe I can place 1k Resistor to N Channel MOSFET ...
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2 votes
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How to prevent voltage spike from BLDC motor in ESC circuit

I'm implementing the circuit below by modifying it using STM32 (Bluepill) and adding some decoupling capacitors (100nF) to the bluepill and LM339 with the supply from the battery also connected to the ...
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Dual H-bridge DC motor driver using logic voltage supply and not actual voltage supply

I am trying to control two 12V motors with this H-bridge board using a 12 V 7 Ah battery and an Arduino Uno. What I have noticed is that my PWM signals are acting as on/off, and the motors are ...
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1 vote
1 answer
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Back-EMF Concepts (Confusion)

I am trying to understand the current and EMF relationships in a brushless motor. Can someone tell me if this explanation is correct? Specifically, I'm interested in what is happening as the rotor ...
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Scooter - BLDC motor calculations

I would like to ask you for few question related to BLDC motor. I am trying to build my own scooter, but I don't know how to choose BLDC motor correctly. Actually I understand the electrical aspects ...
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Can inductors interfere with a BLDC motor?

I'm working on a student project. It involves running a brushless DC motor with 70uH external unshielded inductors on each phase. Can the inductors, seeing as they generate a magnetic field, somehow ...
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Brushless Motor Control Without ESC

I saw a video on the net, titled "How to Convert Car Alternator To Brushless Motor / No ESC With Mosfet Driver", link to it here. I understand in principle how an ESC works, but can't reason ...
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Can you control BLDC motor speed with PWM?

I wanted to control the speed of a very fast and noisy brushless dc cooling fan. The fan I have is a 3 pin 12v 6.3w 120mm fan by Delta Electronics. From what I've learned from the internet is that the ...
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5 votes
3 answers
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What kind of BLDC motor is this?

I pulled this motor from an actuator. I know it is BLDC based on the circuit-board, but I am not sure if it is a three pole or something else.
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Controlling BLDC motor using Arduino and esc

Reffering to this question Do all ESCs operate on this 1ms to 2ms range and 50Hz PWM or is this different for different ESCs, for example, one ESC for RC drones and another ESC for 5055 200kv BLDC ...
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3 votes
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Always stop the motor at the same position [closed]

I asked this question 13 days ago electronics.stackexchange. DC motor has to stop always same spot. If we take the area where the motor starts to rotate as 0, the motor should always stop at 0 degrees,...
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Possible to rapidly oscillate brushless motor? Thinking of either running it blind or using a sensored motor - regular BLHeli BEMF modes fail

I'm trying to get a brushless motor to rapidly reverse directions thousands of times a second - I don't know how feasible this is. I tried a simple setup with a Raspberry Pi and a BLHeli ESC, tweaked ...
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Modelling of 6xPWM for BLDC

I'm looking to model 6xPWM signals to control a BLDC in Matlab/Simulink. My idea is to utilise the additional "dead-time" that you get with 6xPWM to hopefully better control the motor. ...
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1 answer
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Analog control of a brushless motor

I want to control a brushless motor via a potentiometer (voltage range from 0 to 12v), with a dedicated ESC but without an external arduino/stm32/esp32 board There any ESC just built that I can use Or ...
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SLA battery + MPPT use in a go kart

I'm building a hybrid PV/battery kart that is intended to weigh 120 kg with driver and average 30 km/h on a flat tarmac go kart track in full sun. I'm expecting that to require average power of 48 V x ...
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Q: Motor sizing for reeling application

I would like to ask for some help. My application is regulation of vertical speed of the camera, which is mounted on winding/unwinding reel. The camera follows the object (which moves vertically). The ...
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Low-side current sensing for FOC (synchronisation)

I am working on the implementation of an FOC controller for a BLDC motor and I am confused about the synchronisation I should perform between ADCs and PWM. The setup implements 3 leg low-side ...
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Which ESC do I need?

I would like to know how to calculate the current rating for my electronic speed control (ESC.) I want to use a lithium ion battery (Absima Power Tank Lipo 11.1V-60C 6200mAh HC (XT90-Plug)) and ...
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