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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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Can I use a brushed DC motor at higher-than-rated duty cycle at reduced load?

I have a linear actuator powered by a brushed DC motor which I got from an adjustable bed. The actuator label has the following information: Input Voltage: 24V DC Max Load: 6000N (Push) Speed: 4.2mm/...
Brendan Mitchell's user avatar
2 votes
1 answer
112 views

How would you Improve the Smoothness of a 12V DC Motor Drive with Limited PWM Frequency?

I am developing a control system for a 12VDC brushed motor rated at 500W, which is part of a larger project. Currently, I'm using PWM for motor control, but I'm restricted to a maximum frequency of ...
Mark's user avatar
  • 63
3 votes
1 answer
87 views

DC brushed motor - smooth ramp-up to max power

I have good working (mechanically) solution using multiple 4S LiPo batteries (in parallel, for higher current), 500 A contactor and brushed motor. Motor is working for <1.2 s only, but at very high ...
Andrius Narbutas's user avatar
0 votes
0 answers
37 views

Motor and Controller to spin Camera Array

I am in over my depth with respect to motors and drive hardware. Problem The motion control solutions I have tried have failed due to torque insufficiency and noise. Seeking I am seeking motion ...
Go Danny's user avatar
0 votes
0 answers
106 views

DRV8262 not working with PWM signal

I designed a motor driver with the new Texas Instruments DRV8262 at its core. It will be used in robots controlled by an ESP32. It works well when using non-PWM signals to switch the outputs in PWM ...
Louis's user avatar
  • 1
0 votes
0 answers
70 views

MOSFETs fail short on for brushed DC motor driver

I am trying to design a motor driver for an electric car for a fuel efficiency competition. This is the first time I have designed anything like this, and so far I have come up with the design shown ...
Wasiud's user avatar
  • 1
0 votes
0 answers
66 views

Which of these ESC circuits is better for controlling four coreless brushed motors?

I am building a small brushed quad rotor using the following motors [either one of them]: Motor 1 Motor 2 I am not able to decide for which speed control circuit should I use with it. I have two ...
Ashfaque Khan's user avatar
0 votes
2 answers
109 views

Can I use USB C 3.2 Gen2 connector for power and data for a medical application?

My class 3 medical system uses 36V (~100W), 100Mbps ethernet for communication. I am planning to use USB 3.2 gen2 connector and cables to simplify my cabling in the system, and to have EMC shielding ...
NICEGUY NICEGUY's user avatar
1 vote
1 answer
66 views

Brushed DC-Motor with Shunt Winding running on AC?

Why can't a brushed DC motor with a shunt winding (stator and rotor windings are connected in parallel) run on AC? As far as I understand it, the stator current should switch polarity at the same time ...
user2276094's user avatar
0 votes
0 answers
98 views

What is the typical resistance of a DC motor carbon brush

This question discusses the fact that DC motor carbon brushes typically have a "high resistance", but it does not address what that resistance is. Why is it an advantage that carbon brushes ...
dgnuff's user avatar
  • 117
0 votes
1 answer
132 views

How to drive a brushed DC motor with a DC signal, or filtered PWM signal?

I need to drive a brushed DC motor (inside a linear actuator) with an electronics circuit. The cable feeding the actuator has, in addition to supply_A and supply_B wires, two wires for feedback ...
MAX's user avatar
  • 1
0 votes
1 answer
50 views

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 ...
JA8891's user avatar
  • 1
1 vote
2 answers
155 views

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 &...
user139731's user avatar
0 votes
0 answers
72 views

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 ...
alistairboyer's user avatar
2 votes
2 answers
837 views

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 ...
gbmhunter's user avatar
  • 451
3 votes
1 answer
278 views

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 &...
kutukvpavel's user avatar
0 votes
0 answers
368 views

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 ...
Msr09's user avatar
  • 53
3 votes
3 answers
1k views

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 ...
Nice Guy's user avatar
0 votes
0 answers
59 views

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 ...
Nocturnal Gecko's user avatar
0 votes
1 answer
487 views

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 ...
geekygekko's user avatar
3 votes
1 answer
315 views

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 ...
Fred Hamilton's user avatar
0 votes
1 answer
199 views

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 ...
imt_blake's user avatar
  • 441
1 vote
2 answers
548 views

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 ...
Solmyr999's user avatar
  • 149
1 vote
1 answer
427 views

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 ...
Solmyr999's user avatar
  • 149
1 vote
0 answers
143 views

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 ...
L2M's user avatar
  • 11
0 votes
1 answer
161 views

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 ...
Coppers Copernicus's user avatar
2 votes
1 answer
240 views

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 ...
Nitrsa's user avatar
  • 21
0 votes
0 answers
96 views

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 ...
Vladimir Tagakov's user avatar
0 votes
0 answers
47 views

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 ...
Efanatic's user avatar
  • 113
0 votes
3 answers
82 views

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 ...
Quadro's user avatar
  • 141
2 votes
2 answers
617 views

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 ...
Mr. Capacitor's user avatar
2 votes
1 answer
415 views

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 ...
Quadro's user avatar
  • 141
0 votes
1 answer
977 views

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 ...
Quadro's user avatar
  • 141
0 votes
0 answers
162 views

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 ...
FourierFlux's user avatar
0 votes
1 answer
141 views

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 ...
Shamooooot's user avatar
0 votes
0 answers
187 views

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 ...
Andreiul's user avatar
4 votes
3 answers
1k views

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 ...
MCA's user avatar
  • 49
1 vote
0 answers
612 views

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 ...
Steve Ding's user avatar
4 votes
2 answers
2k views

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 ...
Dipendra Gurung's user avatar
0 votes
2 answers
172 views

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 ...
cy1125's user avatar
  • 201
0 votes
0 answers
66 views

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 ...
dbonner's user avatar
0 votes
0 answers
363 views

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, ...
Richard Phillips's user avatar
0 votes
0 answers
342 views

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 ...
Tyler Youngs's user avatar
2 votes
0 answers
114 views

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 ...
Crazymoomin's user avatar
-1 votes
2 answers
79 views

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'...
lasb3tas's user avatar
  • 195
1 vote
2 answers
2k views

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 ...
Hugoagogo's user avatar
  • 2,475
0 votes
2 answers
92 views

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. ...
user avatar
1 vote
1 answer
542 views

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 ...
user13174343's user avatar
0 votes
0 answers
98 views

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 ...
user274774's user avatar
1 vote
3 answers
3k views

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 ...
Kerim Turak's user avatar