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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.

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How do I increase the torque of my dc geared motor

I have been working on a project for quite some time now that uses a dc motor to spin a wheel that unravels a tape measurer(making an extendable lightsaber), and I have been running into an issue that ...
Matthew Meerdink's user avatar
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H-bridge motor braking via NC button

New guy here. I'm doing some work for an engineering professor; he wants me to implement stop/braking capability on the robot we are working on. The platform used is a Pioneer 3-DX, with two motors ...
Flubberknuckle's user avatar
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Thermal efficiency circuit to move an DC electric actuator with PWM

I am looking for a circuit to move an electric actuator with PWM. The actuator is 12V (datasheet) and the normal operating current is ~2A but can reach 8A maximum under some conditions. For that ...
johnnytolengo's user avatar
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IRLZ44N vs IRFZ44N performance - Driving a 12V DC motor(3 speeds) with 12V or 24V supply voltage using PWM

I am trying to run 3 speeds on a 12V DC motor with either a 12V or 24V battery using PWM. I had a working breadboard prototype based on the schematic attached, with the complete code using IRFZ44N ...
Adithi's user avatar
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Battery draining and resistor question [closed]

Say I have a motor that uses 9v @400ma, but it's powered by a 12v battery. I 'd use the ohm law and get a: 7.5 ohm resistor. But, as soon as the battery is being drained, let's say now the battery is ...
Panamanian's user avatar
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Offline open circuit detector for PM DC motor

How can I create a circuit to detect if a motor is connected or not without running the motor? I'm designing a power wheelchair and need to implement an offline open circuit detector for a Permanent ...
Sanjay TM's user avatar
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Can one connect 2 or more DC motors of same or different excitations in series or parallel combination,and how does it work [closed]

I am trying to understand DC motors,but i had this doubt throughout the machines course. .How does speed and torques and speed gets affected(major query)
NISHANT DUBEY's user avatar
-1 votes
1 answer
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How can I determine the input voltage for running a DC motor? [closed]

I have a DC motor that has been on my bench for months. I don't know where it came from. What does it mean when a DC motor has this product number and specifications: ZYT3424F-L94 DC110V Its ...
kamus suwanto's user avatar
3 votes
2 answers
557 views

Stop electric motor when toy elevator reaches end of travel

I'm working on a simple toy elevator powered by some small DC electric motor. I know basic electricity. I figured out how to set up simple circuit with 3-position switch so I can turn on the motor in ...
Ari's user avatar
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How to build a homemade diy motor generator

I am doing a school project and it would be great to have some help. I have built a small generator using a pringles can and enameled copper wire, but when I spin the magnet inside, the voltmeter I am ...
user373561's user avatar
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Calculating supply voltage for a series DC motor

Consider a DC series motor with nominal caracteristics : U=120V, Pa = 3kW, N = 1500 rpm, r = 0.2Ohm inductor resistance, R = 0.3Ohm windings. Suppose the motor isn't saturated and neglecting all ...
Knowledge Seeker's user avatar
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Is this MOSFET compatible with this coreless motor?

As a warning, I will state at the beginning that this project is a hand-me-down and I do not have the complete specifications of components. This is a part of the problem. I am working on building a ...
Alpha Delta's user avatar
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2 answers
79 views

DC motor MOSFET driver (with flyback diode) keeps burning through

I am trying to build a (simple) DC motor MOSFET driver with an unknown specification of the motor. This is my schematic: The problem is that the circuit works for one, maybe two cycles (1 cycle = 1 ...
Josch's user avatar
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Regarding Torque of DC Motor with PWM, Atmega328 and MOSfet

I am trying to develop a system having a DC motor (geared 12v 200rpm). There's a rotary encoder to adjust the RPM of the motor. I am using Atmega328 as the main MCU. To drive the motor I am using ...
spdif's user avatar
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1 answer
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Can I safely "home" a 24BYJ28 geared stepper by ramming it into the limit?

I am building a toolchanger for my 3D printer and I want to use a 24BYJ28 geared stepper motor for the tool changer. When I power up the machine, the machine doesn't know the current position of the ...
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MOSFET or IGBT for DC Motor

Hope you all have an idea. I've got a DC motor (universal, maybe?) with 2 brushes that was running on 120VAC with a bridge rectifier. Says it's 13Amp. I'd like to PWM drive this motor from battery ...
Not_EE's user avatar
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1 answer
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How to increase the revolutions of the DC micromotor model 180 12 volts

I need to make the motor draw 12 volts and 2 amps at idle at 40,000 rpm. I don't know how to properly retrofit an existing model 180 DC micromotor. Specifically: What thickness to take the wire ...
Oleksandr 's user avatar
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1 answer
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Questions About My Perpetual Motion Idea [closed]

Before you read any of this, this is just an idea. I am not an electrician, I am not a contractor, I am not a physicist, or anything like that. I just have an idea that i think could possibly work. I ...
DylDev's user avatar
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Output of TIP122 drops when connecting a load

I have built this circuit: (the components here are labeled wrong LM317LZ is LM317T and TIP122G is TIP122) When there is no load the output of TIP122 is 10V-20V (when adjusting potentiometer) which ...
Raudonkepuris's user avatar
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Can I safely operate a DC motor at 40% higher voltage than nominal?

I'm aware that you can power a wound motor (DC or even stepper) if you limit the current inside the coils. You cannot just apply a higher DC voltage to them. I'm using a DRV8871 to control a VN-C1 ...
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ESP32 and Motors same supply

I'm working on a Sumo Robot project that uses an ESP32 and 4 DC motors and plan to use a 6 AA battery holder to power the entire thing. At first I thought I'd need a voltage regulator to feed into the ...
jimothy's user avatar
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Problem with circuit--ESP showing invalid packet header on powering the robot on by battery

I am trying to build a self-balancing robot, the circuit of which I have attached here. Now I am facing an issue, which is when I power the ESP via the 5V buck convertor output, the ESP gets corrupted ...
Shivansh Chaudhary's user avatar
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Help debugging a chicken coop door problem

(I am not even a noob in electronics so please be a bit patient). I had purchased this automatic chicken coop door which within 3 months stopped working. (the open button would not open the door. ...
ramrunner's user avatar
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2 votes
1 answer
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PMDC motor stops spinning when speeding up with pedal

I am driving a PMDC motor with a half bridge circuit in which the low side MOSFET is a freewheel diode and it is always at "on" stage. I am only switching with the high side MOSFET via an ...
MSB's user avatar
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2 answers
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Using PWM with 9 volts

I am trying to power a DC motor for a minifan, and want to be able to control the speed of the motor through PWM. In order for the motor to generate good wind, it needs 9 volts. Since I am using an ...
Firebender1234's user avatar
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2 answers
43 views

Safely using a "switching power supply" with 220V raw wire input

This article features something called a "switching power supply", which transforms a 220V AC current from regular european power outlets to a DC power output, which can then be used to ...
Yes's user avatar
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3 answers
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Why is the operational speed of DC motor reached when opposed force = motor effect force?

This back EMF course says at 2:46 that in a DC motor, the operational speed is reached when the opposing magnetic force (induced by the back EMF) is equal to the motor effect (induced by the current ...
banhmi's user avatar
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How to Design an Efficient H Bridge using MOSFET for DC Motor (12 V)?

I would like to ask what is the most efficient H-Bridge design using MOSFETs (IRF9540N and IRF9540N). I found many references in this forum like using and I am still confused to decide. My goal is to ...
SKevinAR18's user avatar
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Equivalent brushed DC motor for replacing a PMSM motor

I am trying to understand the relationship between voltage and speed on PMSM vs brushed DC motors. Assuming efficiency is 100% in both motors and there are no losses, and keeping the same load for ...
gmancity's user avatar
1 vote
3 answers
110 views

How to filter the ac signal in a dc cooling fan circuit

The cooling fan in a vehicle is powered by a 12V battery. When the fan begins to work, in addition to the dc current, there is ac signals in the circuit, and the frequency of the ac current increases ...
Reboost's user avatar
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Motor locks when the duty cycle of the half bridge PMDC drive circuit is 0 percent

I am designed a PMDC motor driver. The schmatic diagram is the half bridge circuit I use for unipolar drive. I am controlling the driver circuit with PWM signals from a microcontroller on the PCB. In ...
MSB's user avatar
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1 answer
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Magnetic lines geometry inside a dc motor

How are the magnetic lines of the armature and stator field distributed? Are they always perpendicular to each other or do they align in every half cycle (while the rotor is rotating)? I suppose that ...
Dimitris Charistes's user avatar
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Arduino Nano freezes at random times when motor is connected

I am to run a motor and control it with an Arduino Nano. I want to send signals to the nano with the usage of an nrf24l01. The correct use is that by default the motor will spin at a certain speed and ...
Valantis P's user avatar
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Motion controller using brushed DC motors

I've designed a simple robot with 2 active wheels and 4 omni wheels and I'm trying to figure out the motion controls. I'm using 8300 RPM motors (https://uk.rs-online.com/web/p/dc-motors/3213192) which ...
OM222O's user avatar
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Simulink Simscape Motor Blows Up with Torque Feedback

I am trying to simulate a DC motor using the Simscape -> Electrical -> Specialized Power Systems. I try to simulate an increased inertia by using \$\tau=J\frac{d\omega}{dt}\$ where \$\tau\$ is ...
paki eng's user avatar
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1 answer
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Par control in DC servomotor

How can I control the torque of a DC servo? Servo model: DS51150-180 https://i.ebayimg.com/images/g/pEkAAOSwmFNl4NkA/s-l1600.jpg The current in a DC motor, as well as in a servo, determines the ...
Gael Alejandro's user avatar
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0 answers
48 views

DC Motor Problem Explanation

Can someone explain to me how we got the values for Id and Ud, also how we got that speed and current in armature? The reference for this problem is our professor's chalkboard. I copied it in my paper ...
Knowledge Seeker's user avatar
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3 answers
99 views

Can I control a motor in both directions using two sets of dry contacts

Using a device like a Shelly Uni, which has controllable sets of dry contacts, can two sets of dry contacts be used to run an electric motor in either direction, using only one power source? Ie, ...
Globe B's user avatar
1 vote
1 answer
32 views

Motor for lightweight high torque application (Jumping Robot)

I am in the process of designing a jumping robot, im trying to keep the weight below 2 kg, The robot works by compressing two helical springs with a linear actuator. The maximum force reaches 350N. I ...
Hassie Jayasekara's user avatar
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0 answers
57 views

How to deal with very high current to DC motor

I am using a pickup truck starter motor to build a small crane-like loading arm. I want to control the direction of rotation using an H-bridge, however, when I turn on the mechanism the motor has a ...
R Ram's user avatar
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1 vote
1 answer
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Surging of parallel motors [closed]

This question relates to an issue being encountered by a number of UK model railway enthusiasts so appears to be specific to the 4mm scale models themselves. When two identical models, each with one ...
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1 answer
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Redesign circuit to increase voltage to small motor

I have a small RC system, which is having trouble moving. I think it has to do with the motors not getting enough voltage. The motors support up to 9 V but this is how my current situation is (3B is ...
Johannes's user avatar
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L298 H-bridge: there is voltage, but it disappears once motor is connected

I'm trying to drive a DC motor in different directions with the help of L298 H-bridge (multiwatt vertical package) and an Arduino. I can measure how voltage changes from -5V to +5V, give or take, ...
olegst's user avatar
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2 votes
4 answers
819 views

DC motor voltage kickback when turning off

newbie here. I'm having some problem with my DC motor circuit. As you can see from the image above, voltage does not drop off quickly when it's turned off. I understand that the sudden spike is due ...
Yoonki's user avatar
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1 vote
1 answer
102 views

Would tempered glass be a good material to use within this simple axial flux permanent magnet motor?

I am in the design phase of building a simple axial flux permanent motor, and I am wondering if I should use a piece of tempered glass as both an insulating material and as part of the motor's frame. ...
user57467's user avatar
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0 answers
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How to connect NIDEC RH7-1460000CN

I have a Nidec 50M0600010 (HP p/n RH7-1460000CN) DC motor and I'd be happy using it in my leisure time project. I am a bit confused seeing 5 wires: GND; /VACC; /VDEC/; MFG and +25.5V. Two of them I ...
Jancs's user avatar
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1 answer
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What's the difference between a direct drive/torque motor and a stepper?

A torque motor is 'either a rolled-up linear motor or a classic servo drive with a large number of poles'. As I understand it they are ironless 3 phase supply motors, though perhaps neither of these ...
Oliver Walters's user avatar
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How to determine the values of transportation delay blocks and step block in block diagram?

What are the values of transportation delay blocks and step block in this block diagram to get Motor speed Graph for KI = 1.0s−1, KP = 0.3 and time delay = 0.046?
koka_123's user avatar
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1 answer
110 views

Powering a dc motor from a robotics set with a USB 3.0 PC port

I got my hands on a Gigo microbit robotics set. It uses a control box to house the microbit. As you can see from the control box specs, it uses 6 AA batteries, but it can also use an external micro-...
Wizard's user avatar
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0 answers
39 views

Cable layout for multiple motors and encoders

I need to make a connection between 2 PCBs, the first is a controller board with microcontroller, motor drivers and other peripherals. The second is a motor/encoder board, essentially a three motor ...
mowbly's user avatar
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