Questions tagged [brushed-dc-motor]
Anything related to brushed DC motors. Brushed DC motors are electrical machines used to convert electrical energy into mechanical energy. The conversion is carried out by the interaction of a constant magnetic field generated by fixed magnets or coils with the magnetic field generated by rotating coils which are powered through a mechanical commutator employing brushes to deliver DC current to the moving coils.
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Balloon inflator rocker or micro switch stops working
I designed a balloon inflator that uses a 120v, 6.6A, 800w motor with a power load of 700 and unload of 772 and it uses two types of switches one is a micro switch (10A, 125v)used on the nozzles for ...
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Disengaging or allowing a DC motor to rotate freely
I have a two DC motors with smd reel mounted on the 1st one and an empty reel on 2nd one.
What I want to happen is that my operation will composed of two halves:
1st half: The 1st DC motor is off or &...
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Brushed DC Motor - Driving Forwards With PWM AND Detecting Reverse Motion
I would like to drive a small 9V brushed DC motor using PWM from a micro-controller and came up with the standard circuit of: micro-controller PWM out (J1) connected to a mosfet gate with a current ...
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Braking vs. Coasting During The PWM Off State Of A H-Bridge
Let's pretend we have a standard 4 MOSFET H-bridge that controls a 12V brushed DC motor. When driving the motor forward, we can keep SW4 on continuously and pulse SW1 on and off (see below image). If ...
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What's the correct DC-motor brush shape?
First, a little bit of application background. Recently I came across a shipment of DC-powered pumps (like these, it says diaphragm but in reality they are more like plunger ones, i.e. they require a &...
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Need suggestion on wire size (AWG) for running brushed DC motors
I am a beginner and working on building a 4-wheel unmanned ground vehicle. I bought four brushed DC motors from Pololu. According to the datasheet, the stall current is 4.9A. But the wires that come ...
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How can I clamp the voltage precisely from the back EMF of a brushed DC motor?
I am using DRV8412DDWR in a medical product, where we are driving two DC motors (graphite brushed) bidirectional using PWM.
In our application, we have to suddenly stop the motor. When we do that, we ...
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How to have a regulated 5v DC voltage from a 15-25v DC, 0.5A - Electric Motor Generator?
I am trying to make a hand generator to charge a phone. I have a set-up that can create 15-25v from a DC electric motor. I would like to have a regular output of 5v. I have done some research and ...
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Understanding equivalent circuit of permanent magnet brushed DC motor
I started to work on a project, where I have an unknown permanent magnet brushed DC motor. To be able to control it, a model is needed. Starting with measuring armature resistance and inductance, I ...
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How is this 1950's DC blower motor with 2 black wires and 2 red wires supposed to be wired?
My brother bought an old Flxible Visicoach and it came with this DC blower motor for the heater:
I've searched (appears to be a GE 5BN56LA15) but can't find a mention of it anywhere. I've torn it ...
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Measured continuity between my drone motors connected to N-channel MOSFETs
I am building a drone to understand more about the associated electronics and operation. I am using this guide as reference.
My drone is basically the same, but I replaced the SI2302 N-channel MOSFET ...
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Permanent magnet brushed DC motor freewheeling
As a hobby project, I want to mount a permanent magnet (PM) brushed DC motor on a bike.
I've already asked a question about the PWM and half-bridge driving circuit for the motor and got a very useful ...
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PWM brushed DC motor driver circuit
I want to mount a brushed DC motor on a bike and drive it with PWM.
I know I could directly use a PWM generator IC, a 555 timer, use an Arduino or use an already made DC motor driver, but I want to ...
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Brushed DC motor drive reverse-engineering
I have a mains powered brushed DC motor drive capable of 800-1000W (allegedly). I am using it to power a threadmill motor, for power tool application.
The drive is quite simple and I worked out the ...
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Is it possible and safe to switch between the motors when required?
I want to control a two phased stepper motor in an application, so I chose this driver. There is also a requirement for a brushed DC motor in the application. I want to save space eliminating an extra ...
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Homemade DC motor won’t turn
I’m trying to build a DC motor powered by a 9V battery. The motor consists of a 3mm diameter steel rod, PVC I cut for the armature, 28 gauge insulated magnetic copper wire, 2 neodymium magnets, and ...
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Can I safely overvolt DC-brushed motor when using a driver?
I'm trying to use a car jump-starter to power my robot and for some reason its voltage is not 12 V but in the range of 15-16 V.
I have step-downs for logic and servos, but my main motors are connected ...
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How does PWM frequency influence the inductance of a DC motor? [duplicate]
I have read in this white paper that "Since the motor inductance varies depending on the PWM frequency, at typical PWM frequency of 50 kHz, the inductance may decrease to as low as 70% of the ...
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Energized motor driven in opposite direction?
This question is regarding brushed permanent magnet DC motors.
Suppose that the motor's output shaft is connected to a torsional spring which was at its unstretched state when the motor was OFF. After ...
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How to protect my 120V H-bridge against inductive spikes and calculate and introduce dead time?
I am currently working on this design and I would like to see if I can get some feedback regarding the protection for my MOSFETs and see how I can introduce dead time as I would like to prevent any ...
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Some doubts regarding electronic throttle motor
I am trying to wrap my head around the working of electronic throttle bodies. So they usually have a brushed Permanent Magnet DC Motor which actuates the throttle plate (butterfly valve) via a gear ...
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Does PWM control DC motor's speed or position? How to control DC Motor's position?
The type of motor that I am working with is a 12V brushed permanent magnet DC motor.
By following this video by Mr. Paul McWhorter I was able to control the speed of my DC motor by using the ...
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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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How does a system measure the speed of a servo motor using brushes on the commutator?
I have a servo motor with 4 brushes on its commutator. The motor is connected to a controller that enables the user to control the speed and at the same time it has an analog RPM meter which most ...
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What's the minimum duty cycle which can be applied to a brushed DC motor?
I am trying to control the speed of a brushed DC motor by varying its duty cycle. By testing it out, I have found out that for my application it should not go above 60% of its duty cycle, this being ...
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Weird speed issues with brushed DC motors in parallel?
So I have a simple system where I want to run eight large DC brushed motors (for wheels) in parallel, which should give them all the same voltage, and they should independently change rpm depending on ...
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48V 30A PWM Brushed Motor Controller
I am trying to build a motor controller for 48V brushed motor. The motor draws around 20-30A current under load and peak to 70A sometimes. I was using an Arduino to generate PWM wave around 7kHz for ...
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Convert a 12 V DC motor into a 24 V motor
I have a trolling motor that is rated at 12 V. I want to double the speed of the motor.
If I change the armature wiring by using a thinner wire with more turns, will I able to use it on 24 V DC to get ...
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Driving a motor using SPST relay
I'm trying to drive a brushed DC motor of 24V and 7W (sorry I don't have the datasheet) using a power relay on a PCB using a STM32 microcontroller.
My plan is to use my STM32 to control a transistor ...
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Optimal brush advance map for large brushed DC motor with active advance control
I am posting here for advice as to the procedure to construct a map from motor speed and amps to advance for a Brushed DC electric motor with realtime, fast advance control.
I have built a Brushed DC ...
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Can I use any variable 0v-5v source to engage ebike controller to work as if it had a twist style hall throttle?
The hall throttle plugs to a 3 wire connector. 5v, signal and ground coming from the controller goes through the hall throttle and is reduced to 0v-4.2v for a variable speed control. My question is, ...
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Brushless motor makes knocking noise when running in reverse
I bought this off of ebay, to go into my Razor MX500 dirtbike and connected it to a 72V 20AH lifepo4 battery. After fitting the motor, it was running nice and smooth but I noticed that it was driving ...
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DC Motor driving large offset mass, smooth acceleration/deceleration?
I've got a large mass (0.5-2kg) on the end of a 0.5m rod. I'm trying to swing it smoothly as an inverted pendulum using some brushed DC motors with planetary gearboxes and quadrature encoders (GoBILDA ...
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DC motor limits [closed]
I bought a 12V 35W DC motor, 50RPM, 15kg.fcm of torque.
As it should, when it has a low load it absorbs only a couple of hundred mA.
Can I raise the voltage on the motor without exceeding 35W since I'...
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Understanding back EMF measurement in brushed DC motors
I have been doing some preliminary research for a project and am trying to understand how sensor-less speed control of brushed DC motors can be done by inspecting the back EMF.
Where I am at with my ...
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How is the technique and method to determine the optimum operating voltage of a dc motor
How is the technique and method to do measurement test in order to determine the optimum operating voltage of any type of a dc motor ?
as always shown to us in motor specs e.g.
...
user289171
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Where are the capacitors on the l298n module?
Note I am a beginner :)
Looking at the l298n datasheet: https://www.sparkfun.com/datasheets/Robotics/L298_H_Bridge.pdf
I noticed on the block diagram and "Pin Functions" table, there are ...
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How I can read optical encoder pulses on High RPM
I am working on a project in which I am using two DC motors with encoder but after certain speed ( my DC motor operating voltage is 24 V but when I give it more than 15V )my MCU CC1350 start missing ...
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Controlling a DC Motor via an analog PID circuit
I am trying to design a 1 DOF copter as in this drawing:
For this circuit there is a stick connected to a DC motor and potentiometer. The potetiometer can be rotated. I need to control the position ...
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Why can't I power a brushed DC motor from a powerbank?
Today, I've tried powering an 8520 coreless brushed 3-5V 0.15A DC motor from a 5V/1A power bank. The powerbank is unfortunately unspecified (its old and was originally a part of a company gift bag, so ...
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What are the effects of self-inductance in a DC armature?
So, I just stopped to think that, for the armature coils, the current passing through them varies with time due to commutation.
The voltage applied to different conductors in the armature varies ...
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What's the theoretical efficiency curve of a series motor?
I'm making this post mostly to check things for another post I'll make (if I don't find any error up to this point).
I'm trying to calculate the efficiency for an ideal DC series motor as a function ...
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Error while simulating the speed control of a brushed DC motor using a 555 timer and a high boost convertor using Multisim simulator
Reference paper: https://ieeexplore.ieee.org/document/6183251
I'm trying to simulate the speed control for a brushed DC motor using a 555 timer (astable multivibrator) and a high boost convertor using ...
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Can a repulsion motor be connected like a series or shunt DC motor?
Recently I bought an old repulsion-start induction-run motor made by Asincron in Argentina, exactly identical to the one in this video.
I can't find much documentation and information about how ...
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Dc motor speed measurement issue [closed]
My setup is E6B2 incremental encoder(1000pr),Stm32 nucleo-l452re-p.I'm trying to measure speed for system identification and my graphs are looking kinda odd.
I tried to increase the gab "Te"...
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Why is the mechanical power of a DC brushed motor at a maximum at around 50% of the stall torque?
I don't currently fully understand how a DC brushed motor reaches maximum mechanical power at around 50% of their stall torque. I know that a decrease in the speed of the rotor will decrease back-EMF ...
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Can we mix pwm and resistor to control brushed dc motor speed?
In my car the blower motor speed is controlled by 4 valie resistor pack.
I want to have fine tune speed control so I am planning to add a pwm fan speed controller ( Generic).
My question is if I ...
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Connect motor control board's 4 terminals to brushed motor
Although I have a degree in engineering, it's mechanical engineering. In addition, I have been developing software since I graduated, so please excuse my obvious ignorance about electronics hardware.
...
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Burned the voltage regulator of a DC motor driver,
While I check the specs and thought the driver could handle it, after about an hour of discontinuous use, the driver stopped working...
I used the following :
Motor
Specs:
24V 250w,
rated current 13.4 ...
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24V, 200W DC motor Control using N channel H bridge
I am trying to build a controller for a brushed DC motor.
AIM:-
To Run the motor at continuous load of about 8A.
Rotate motor in both the directions i.e. forward and reverse.
Control the speed of ...
