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 I calculate the current used by a BLDC motor under a load?
I am working on a robotics project where we are currently designing a battery. This battery is specific for a motor driver and two BLDC motors. I would like to know how much current will be drawn from ...
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Torque control of a BLDC motor
Please forgive my lack of perfect electronics knowledge. I am here to learn.
I understand I am clearly missing and misunderstanding something important. The aim of this question is to find out what it ...
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select the proper HALF-BRIDGE DRIVER for DC motor application
I was looking for a HALF-BRIDGE DRIVER for my H-bridge and BLDC motor projects, however, I found most of the MOSFET gate drivers are two types
One has SD (Logic input for shutdown) and IN (Logic input ...
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Motor Constants - Formulas
I have some problems verifying the motor constants in the table below.
From my knowledge, the following formula holds between the torque constant
and the BEMF constant:
Now, in the datasheet mostly ...
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Feedback of the smart gate drivers
I have seen a smart gate driver DRV8353RH being used with a three phase motor. There are also input feedback pins to the gate driver that senses the voltages and this could be used to do speed ...
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BLDC motor - how do I find out which phase should be positive and which negative?
In this picture the current is either positive, negative or float for the phases. I am confused and can’t figure out which needs to be fed what, for my motor to go the direction I want.
Source: https:/...
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How to reverse the polarity of a DC brushless hobby motor?
How can I reverse a motor safely that draws about 70 A on 4 s (14.8 V), and additionally how do ESCs (Electronic Speed Controller) that have this capability built into them do it?
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Relation of KV to speed in BLDC motors
The KV parameter determines the angular velocity of a motor for some voltage. I can't wrap my head around how the same supply voltage can result in different angular velocities if (I'm also unsure ...
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BLDC motor with a common enabled configuration
Can a BLDC motor be driven with a common enable configuration? To be more precise, without the possibility to leave a phase of the motor floating. Every phase must either be connected to Vcc or to GND....
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STM32 STEVAL-Spin3202 Motor control - Issues with driving power MOSFETs with PWM
I've been struggling with my new STEVAL-Spin3202 board from STM. It is using the STSpin32F0a motor driver with STM32F031C6 MCU. The ultimate goal is to control a BLDC motor with six-step sensor-less ...
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BLDC hall sensor output to pulses
I want to combine the output of the three phases of the hall sensor output to generate a pulse for any change in the output of the hall sensor. Can someone suggest a circuit implementation to achieve ...
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Unable to vary speed for a 2 wire BLDC motor
I have a 2 wire BLDC motor (UNMS 020KPDC-B), when I hook up directly to the voltage supply and vary the range between 2.7V and 6V, the speed changes. I purchased a TB6612FNG kit and hooked it up to ...
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Motor constants and motor poles
From what I read, if I'm dealing with a BLDC motor, the torque constant \$ K_t \$ and the back-EMF constant \$ K_e \$ are, numerically, the same (using SI units).
However, if the motor has a big ...
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Can anyone explain electrical and mechanical angle of BLDC motor?
If a 3 phase 6 pole BLDC motor is 120 degree trapezoidal/block commutated and 6 switching sequense is required.
How do you calculate the electrical degree per pole and mechanical degree?
How many ...
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simplest way implement ESC circuit for drone?
I'm designing a fun little quadcopter PCB based around the RP2040 chip and am interested to incorporate the ESCs in my design, all on one board. They don't need to be too fancy in terms of features ...
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Finding BLDC motor amperage and needed battery power
Im currently trying to build a motorized sofa chair. Physical things such as structure is of no issue to me, however the issue comes with finding motors and batteries that will work together and not ...
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CAN communication in dsPIC33CK64MP508
I tried to transmit data using CAN communication in dsPIC33CK64MP508. I use MCC for configuring CAN in dsPIC33CK64MP508. I set the bit rate to 500 kbps. I just transmit two data bytes (0x41 and 0x42) ...
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Actuator using a BLDC motor simulation
I need to represent an actuator which is using a BLDC motor in Simulink, for my Bachelor's Degree. I don't specialize in electrical engineering, but in mechanical engineering, so I'm at a loss here.
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PID output to motor rpm
I am working on my project "Control design for tilt rotor." The UAV has 4 tilt rotors and I am using PID to controller for position and attitude control (outer and inner loop).
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How to work with analog signal use to control sensorless BLDC motor?
I am study for the analog signal use to control BLDC motor and I have developed in program in STM32. This method is used to control BLDC motor proper document don't give any other website. So can you ...
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Stall current in BLDC too sudden for control
I'm working in a wheeled robot where each BLDC motor is controlled by a driver. These drivers are designed by ourselves and are working fine, they use Hall sensors and encoders for speed feedback loop,...
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Resolver position offset
I try to control the BLDC motor. I am using the Resolver sensor to get the position of the motor position. but I don't know how can I get the rotor offset position.
Can someone explain it to me?
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Why my PMSM motor does not rotate?
I have implemented a FOC algorithm with Simulink -> C Code and an uE from ST (stm32f446re) but I am stuck the last 3 months and I cannot find the solution.
When I give Iq Soll as input, the motor ...
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BLDC motor - strange phase waveforms
I trying implement bldc motor driver based on below schematic.
The color circles on schematic correspond to waveforms from oscilloscope (all probes are connected to common GND of MCU and PSU that ...
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Hall sensor or encoder
I have an Ashwoods 1008-269 motor, and I'm having some trouble actually finding a proper datasheet for it. Does anyone know whether it uses encoder or hall sensor, and the pin layout of the output ...
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Ways to measure brushless motor velocity?
I am using an RC car chassis for some robotics work, I am interested in sensing motor velocity.
With brushed motors the only option appears to be using an external encoder(though I wonder if spikes ...
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What is the equivalent DC motor inductance for a BLDC motor is phase-to-phase inductance is known?
Suppose I have a 3-phase BLDC motor, and I am provided/can measure the phase-to-phase inductance. If I would like to model this BLDC motor as a standard voltage controlled DC motor, what is the ...
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Hall sensor placement Inrunner BLDC
I have an In-runner BLDC motor with 9 windings on the stator and 6 poles on the rotor (3 magnet pairs). I am needing to install Hall sensors (41F) in the motor to reduce cogging as I am installing it ...
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How to use a BLDC motor, solar panels and batteries efficiently [closed]
I have a 48V 1800W BLDC motor, 4X 12V lead acid batteries and 4X 100W 12V solar panel.
My question is, can we use those 4 lead acid batteries when connected in series to power the BLDC motor?
If the ...
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1400 Kv BLDC motor problem
I have a A2212/10T 1400 Kv (1400 RPM / volt) brushless DC motor and a SimonK 30 A electronic speed control (ESC.) I have connected it to an Arduino. It is not powering up when I use only battery ...
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cannot get the correct signal voltage from the bldc controller output phase
I am currently working on a BLDC (Brushless Direct Current) controller project using Arduino to manage a 48V BLDC motor. The controller utilizes a trapezoidal control method, which involves a six-step ...
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Is it theoretically feasible to establish transfer function of a BLDC motor under torque control with frequency response?
I am working on my assignment of Control theory at school. I designed a gimbal using BLDC motor, it works fine now but I need to demonstrate how the PID parameters were determined in my paper.
After ...
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Gate-source voltage waveform in brushless motor drive
What should be the gate-source voltage waveform of the upper side MOSFETs in a brushless motor drive with a trapezoidal control method?
Are these parts marked in red in the picture above normal?
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How to control BLDC motor in DRV10983 driver to STM32G030F6P6 controller?
Am using in STM32G030F6P6 controller. I use DRV10983 driver IC to control BLDC fan motor. I am new to this driver IC. Can anyone help me know to How to use this DRV10983 Driver IC and communicate with ...
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Help me identify and run this motor
I've found a non-functional orbital shaker made by Stovall. When plugged in the power LED turns on , but the motor doesn't run. I thought I'd open the case and try to figure out what went wrong.
There ...
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Hall effect placement on axial flux BLDC motor
recently i was given a project regarding flywheel energy storage. One of the main component of my project is a axial flux BLDC. I have been searching around and i couldnt find a good source regarding ...
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Regenerative braking on BLDC motor
I am trying to design regen Braking for BLDC motor controller I used three switch topologies for regenerative braking.
In three switch method, high-side MOSFET S1, S3, and S5 are kept OFF and low-...
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Adding external parts with heat sink to increase max current of SimpleFOCMini driver (DRV8313)
Question: Is it easily possible with some external MOSFETs or similar things to increase the max current the DRV8313 can handle per phase of a 3 phase BLDC motor? Will be 3 parts enough, or would I ...
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SVPWM Simulation
I am a student and I want to develop open loop SVPWM code with stm32. I created a Simulink model by doing research on the internet. But I have a few questions for you. The model I created is as ...
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Unexplained current perturbation with 3 PWM PMSM control
I encountered some problem of current measurement using the DRV8323RH to drive a PMSM motor in 3xPWM mode.
I am running a test under the following conditions:
1 DRV8323RH gate driver configured in 3 ...
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How can I reduce the spark while connecting the battery?
I've been working on a drone that works on a 12S batter (maximum 50.4V.) I am using an Amass XT90 anti spark Connector to connect the battery to the power distribution board (PDB.)
The drone has an ...
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Controlling multiple continuous rotation servomotor for a vending machine subsystem
I am trying to implement/design my own snack's vending machine and I have already solved the payment transactions through MDB components and communicating them by means of a MDB to Serial adapter to ...
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Calculation of Total Required DC Link Bulk Capacitors in Motor Drive
Would anyone let me know whether the following formula is correct to estimate the total amount of DC link bulk capacitors for a 3-phase permanent magnet motor drive to handle the startup inrush ...
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Why does a simple BLDC motor circuit need CAN communication?
I was looking at this open source BLDC motor circuit, and I noticed it had a CAN bus transceiver apart of the circuit. I don't understand why this circuit would need a CAN bus transceiver? Does this ...
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Voltage behaviour in battery-powered vehicle when motors regenerate
I am wondering how the voltage in a battery powered vehicle will behave in case its BLDC motors are acting as generators (i.e. while decelerating). In a system powered with a DC/DC converter for ...
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Quality Check of a Brushless DC motor on an oscilloscope
I am Quality Checking some BLDC(Brushless DC) motors with an oscilloscope by connecting the BLDC to a drill, running it and viewing the output on my oscilloscope. I have been checking the Vpp(Peak to ...
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3 Brushless 40v Ryobi Motors with factory controllers; 4 12v 149Ah batteries in series for RC mower
First off I would like to say I am not a electrical engineer and know little to nothing as to what I need help with.
I have 3 40v Ryobi push-mower motors with controller off eBay:
Long Story short I ...
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Connecting computer and motor driver grounds
I am designing a robotic system and seem to be having a ground issue whilst working with motor drivers.
To improve system stability and for EMI concerns, I have split the power and signal using an ...
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Can a BLDC motor be actively retarded (braked) by decreasing the electrical drive frequency?
I need to implement very fine (positioning) control of my BLDC motor system, one which has significant inertia. Basically servo control of a weighty object.
Is it possible for a BLDC motor be retarded ...
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How can I calculate RPM for a DIY custom BLDC motor that works on 12/24 volts?
I'm working on a project where I'm designing a 12/24V BLDC motor. I have nine slots for winding and eight neodymium magnets. I used this for calculating the winding factor which is 0.94521 and winding ...
