Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [dc-motor]

A common actuator in robotics; it's usually made of a static magnet (stator) and a set of moving inductors, acting as electromagnets, connected to the circuit through brushes. Brushless motors use phased clocks with electronic circuitry to generate motion.

0
votes
0answers
4 views

voltage traces across pwm driven dc-motor: is that ok?

I'm driving a dc-motor with a BJT turned on and off with a 555 generated PWM signal. Here's the circuit (V1, Rl and L1 simulate the motor): There actual circuit - same parts - is on a breadboard and ...
0
votes
0answers
25 views

Shorting the output of both the channels of L298N

Suppose I started with a project requiring the control of motors and ended with using L298N in my project, realizing that my motor only takes around 1.5A when on load. Now, with time I realized that ...
0
votes
1answer
79 views

Why is my 180v dc motor circuit not working?

I bought a "Johnson" treadmill motor that I know works well, it's 180v, 10amp, 2.5hp. I decided to go with the cheap setup, so I powered it through a 10000w 80amp max scr, going through a full bridge ...
-1
votes
0answers
23 views

Need help for DC motors and H-bridge [on hold]

Im working on a project, it will be a barrier that will open up when the correct password was entered and will close down after a while, (its like the barrier at paid parking lots and train crossings)....
1
vote
1answer
102 views

I want to command a 12V DC motor with the output of a clock alarm [on hold]

I want to command a 12 V DC motor with the output of a clock alarm. The output of the clock alarm is a 1V (pp) square signal of 100 Hz. I just want my motor supplied when alarm is on and then stop ...
4
votes
1answer
111 views

Detect speed of DC motor electrically

I'm looking to build a small robot using inexpensive DC micro gear motors. I would like to be able to measure the speed (count rotations) of the motors for accurate positioning etc. I'm aware that ...
0
votes
2answers
60 views

Reversing Direction of a DC Motor with Delay

I am making a kinetic sculpture and the movement of it requires a reciprocating motion. I have made the designed such that a dc motor powers the movement of the sculpture, and a rotating beam that ...
0
votes
2answers
70 views

Explanation of an electric motor schematic

Below is the schematic of a Bosch electric motor: What are the three double-lined (one thick one thin) elements on the left side? What is the part on the right (black thick lines)? What is the white ...
1
vote
2answers
122 views

What happens when an electric motor stalls?

Most electric motors have a “stall torque” listed and my understanding is that if you limit the output it will “stall”. What actually happens inside the motor that causes it to stall and why does it ...
0
votes
1answer
41 views

Which Approach is Better to Drive Brushless DC Motor with PWM Duty Cycle

I'm doing a project that use brushless geared DC motor, the motor is connected to a moving platform. I will drive the motor with PWM, the motor then move the platform from -a degree to a degree ...
0
votes
0answers
72 views

Transfer function of DC Motor

I'm trying to verify whether the transfer function in this control diagram is the one stated in this document. I tried solving it and got this: Shifting the armature current \$I_a\$ feedback point ...
0
votes
1answer
35 views

DC motor model issue

I use the following DC drive model: with the following parameters of the motor: Matlab variables for these parameters: ...
1
vote
2answers
105 views

Torque and speed control of a DC motor

I'm new to electronics and this is my first post so please be patient with me. Introduction I am required to design a rehabilitative exoskeleton-like knee-brace to assist sit to stand, I have faced ...
0
votes
3answers
51 views

What would happen to the voltage or current flowing through the motor in an h-bridge

I was wondering if some one could help me understand what would happen to the motor if I suddenly change the rotation from clockwise to anticlockwise or vice verse in an H-bridge configuration, would ...
0
votes
3answers
53 views

Variable Current Draw from motor for torque control [closed]

I am building an electric go-kart. I would like to use regenerative braking. I would like to have a brake pedal that controls the amount of torque (slowing the motor and wheels down) that the back emf ...
0
votes
0answers
54 views

Design a DC motor with a transistor

I am trying to design a DC motor with transistor. Following image shows the exact way I am trying to do so. How would I go about doing so, I am not so familiar with transistors, but something that ...
0
votes
1answer
41 views

How to reduce inrush current for DC Motor in boom barrier gate application?

I'm using 24V 25W 100RPM DC geared motor for boom barrier gate application.So I added an overload protection for that circuit but whenever the motor starts the inrush current is produced and it ...
1
vote
1answer
36 views

DC Motor Controller: hacking it bidirectional?

I just picked up two of these DC motor controllers (https://www.amazon.ca/Controller-Yeeco-Universal-0-01-1000W-Generator/dp/B00RZ97DDQ/ref=sr_1_10?dd=1QzB1w0bE3cxmYrmXew-NA%2C%2C&ie=UTF8&qid=...
0
votes
1answer
69 views

DC motor is pulsing when connected to power supply

Apologies in advance if my terminology is not exact, as I'm a very amateur hobbyist just starting out. I have a DC servo motor that I bought used, rated at 24V maximum, with variable RPM depending on ...
0
votes
2answers
51 views

MCU Reset with DC Motor driving (PWM)

I would like to understand a problem which i have with a little MOSFET test with a dc motor. My power supply drive the motor at 12V and it consume 1A. My circuit is very basic. I have a stm32 MCU ...
0
votes
1answer
38 views

How do I choose appropriate fuse for my circuit?

I am currently using a AC-DC adaptor with specs: AC-I: 100-2040V~50/60Hz 1.6A DC-O: 12V 5A Which is powering up 8 DC motors, 4× 12V 6W 4× 12V (wattage not specified, the motor is meant to be ...
0
votes
0answers
33 views

Simple PMOSFET 12 Volt Motor Control

I tried making a simple control circuit the other day, but was a bit of a dud. Hoping that someone can help point out where I went wrong. I was hoping that disconnecting the switch would draw the ...
0
votes
1answer
82 views

Effect of a coil before DC motor

I am wondering what effect a coil before a DC motor has. It's a 3 AA battery powered (4.5V) small RC car. I cut off the cables going to the motor and connected the motor to the battery directly (I ...
0
votes
1answer
54 views

DC Series Motor Starting Direction

I have a 12V DC Series Motor - a car starting motor - for an experimental aircraft to pre-spin helecopter-type blades before takeoff. Usually, it works correctly but occasionally with power on, no ...
0
votes
0answers
71 views

Do I really need motor drivers for a quadcopter? [duplicate]

I am planning to build a quadcopter, so I searched about motor drivers, then I thought "Do I really need a motor driver?", I mean the only thing I want to control is the motors' speeds, so won't ...
0
votes
3answers
116 views

Right reasons for using a voltage regulator for DC motors

I read in an online book at https://www.learncse.com/images/Lessons/Lesson_14.pdf following reason for using a voltage regulator to power DC motors. While I understand the importance of using a ...
1
vote
1answer
73 views

DC motor causing project to work unexpectedly

We have developed in protoboard the following schematic for driving a DC motor with transistor for Arduino, but instead of using the PN2222 transistor, we are using a MOSFET IRF540, and instead of ...
0
votes
1answer
24 views

Trigger motor through Raspberry Pi if it's plugged in, otherwise through touch sensor

I'm trying to design a custom PCB that is powered through USB (5V DC), has a touch sensor, powers a DC motor and can optionally have a Raspberry Pi Zero plugged into it through a GPIO header. If the ...
0
votes
0answers
57 views

Why H-bridge isn't working properly?

I am making a circuit to control a motor using an Arduino UNO and an H-bridge IC, but it's not working, rather something strange is happening. Circuit's scheme: When the motor is connected to pins 3 ...
0
votes
1answer
43 views

How to change a predefined PWM frequency?

I have a controller which has predefined PWM frequency of 150 Hz. This output is used to control a motor. However, I want to use another PWM frequency, but I can not change the PWM frequency on my ...
0
votes
1answer
19 views

Solar Panels: Charge Batteries via MPPT Charge Controller *AND* Power PV-Direct Load At Same Time?

I have two 290 watt panels in series that are currently used to charge a 48V battery bank via a MPPT charge controller. The run from the panels to the charge controller and batteries is about 70', and ...
0
votes
2answers
69 views

H Bridge extreme voltage drop

I was trying to implement a H-Bridge circuit but had a lot of failures. I'm not really good with electronics, just some basic knowledge. So I've started by creating an buffer to switch the full ...
0
votes
1answer
26 views

Fuse needed to prevent too much current draw in DC motors?

I am building a basic Raspberry Pi robot: the Pi controls the enable pins on a dual-bridge motor controller bridge via PWM and sets the input pins for direction. I have a variety of battery options ...
0
votes
3answers
118 views

Stall current calculation for DC motor

I'm trying to calculate the stall current for a 12 V DC gear motor (919D1481): No load speed = 15800 RPM No load current = 0.52 A Nominal speed = 13360 RPM Nominal current = 2.85 A ...
-1
votes
1answer
40 views

High Output Current with Short Circuit Protection KA7824 Regulator [closed]

I have a circuit board with the following set up with the voltage regulator KA7824 This picture is taken from the datasheet of the voltage regulator as one of its uses. my circuit board converts AC ...
1
vote
1answer
85 views

LED indicator - How to show 'on' when circuit is open

I am designing a circuit to replace a problematic computer controlled raise/lower operation for our mobile home bed. The bed uses a 30 amp DC motor (similar to a wiper motor) and simply reverses the ...
0
votes
1answer
27 views

Converting DC Motor's Tachometer Output to DC Using Bridge Rectifier

I have a DC motor that its specification states that "Electric DC motor manufactured by Buehler. Sinusoidal Encoder Output: 11.5 VAC - 870 Hz @ 12 VDC input. No load speed: 6800 RPM. Runs in either ...
0
votes
1answer
55 views

DC Motor Control with PWM and Polarity Switching

I want to be able to rotate the motor both clockwise and counter clockwise while also controlling the speed of rotation of said motor. This is a small dc motor and the whole thing is running on 5V the ...
0
votes
1answer
72 views

220/240 to 200v dc power supply

I have a 12kva (10kw) ups and I want to power it from a 24v battery bank. The dc input is 192dc input from the battery side. I was thinking off getting a 24 to 220 Inverter and rectifing it to output ...
0
votes
1answer
42 views

speed control PWM, DC motor, L298n with LPCxpresso 1549

this is my first post and I'm just asking a little bit about motor control in a team project, where I'm member of. This is a bit of a "not so serious" project so probably the solar panel system ...
0
votes
2answers
73 views

Voltage required to run four motors

I am new to electronics and robotics, so I apologize if my question is dumb. I am trying to run four motors with two L293D, and here is the configuration that I am thinking of: DC Motor This is the ...
0
votes
0answers
33 views

L298N motor driver output error

I had worked previously on a project which used a L298N motor driver to control motors.Datasheet Link. I have now completed my project and started with the production phase of it. But while I was ...
0
votes
1answer
50 views

Mini solar panel to DC motor

I have a mini solar panel 5.5 V 1 W 180 mA and I want to connect it to my DC motor 3-6 V. I tried directly but it didn't work. After some research I found that I needed a inverter. My question is: do ...
0
votes
0answers
24 views

IGBT Power Calculation in motor control application

My DC motor's nameplate says: VOLTS: 125 AMPS: 27A HP: 4 HP RPM: 5000 RPM DUTY: CONT. I chose this IGBT IKW50N60DTP to drive the motor with a PWM frequency of 5 kHz using a single-quadrant ...
0
votes
1answer
53 views

Carbon Brush Specific Resistivity and Wear

Kindly ask for knowledge share and support about Dc motor commutation principal. I have a brush wear issue on a DC motor with brushes which I try to understand the reason. As I read in the literature,...
0
votes
1answer
48 views

PWM as a voltage regulator for 12V wiper motors and 14.8V LiPo

I'm using 12V (~40W) car wipers motors for small robotic project. Motors are driven over MOSFET H-bridge (IRF1405/IRF4905) with PWM speed/power regulation. Currently a voltage source for motors is a ...
1
vote
1answer
82 views

Mosfet Motor Drive amplifying duty cycle of PWM

I am receiving PWM signal at 7.8V from a given controller, with which we need to control the speed of a DC motor at 18 V. I implemented the following circuit for this. However, the output to motor ...
0
votes
1answer
46 views

How capacitor values are determined in this circuit

I am following the course on control systems from edx. I have this circuit as part of practical exercise. I would like to understand how the capacitor values were determined in this circuit The 47uF ...
0
votes
0answers
39 views

DC motor speed calibration

I have seen some treadmills with DC motors that have an option in the console to calibrate the speed sensor by making the motor run from 0 to max speed. Also, some of them have an external ...
0
votes
2answers
91 views

Brake DC MOTOR circuit

I have a DC motor that is controlled with an npn transistor with pwm. Everything works fine. I want to brake the motor instantly. I tried to short the terminals with another pairs of transistors but ...