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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2
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0answers
54 views

Is it possible to control the speed of DC motors with Arduino's analogWrite() using analog pins? [migrated]

I'm trying to control the speed of two DC motors that are connected to a dual H bridge. I always used digital PWM pins with analogWrite() to change the speed, but ...
-2
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0answers
44 views

Calculating the required power of a motor [on hold]

I have following parameters: Weight of car: 200 kg Required speed: 20 km/h Now what will be the required power of motor to drive it as well as the torque?
1
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3answers
63 views

How to power a 12V fan simply using a PV panel?

I am an electronics noob and I'd like to create some air circulation through my friends cellar using a salvaged 12V 0,8A brushless DC computer fan and a suitable PV panel. I have searched Ebay for 12V ...
1
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2answers
63 views

DC motor as rotational speed sensor?

Will spinning a small DC motor work effectively as a rotational speed sensor (by producing voltage)? I'm trying to measure the rotation of a shaft (driven by a trackball) on a shoestring budget. I ...
0
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0answers
20 views

Can I use the power-to-weight ratio of a motor to estimate an arbitrary motor's weight?

Not sure if this is the right place (redirect me if you know a better site), but could you use the power-to-weigh ratio to estimate the weight of the motor if I know the amount of power I need. I.e., ...
0
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2answers
47 views

DC Motor: Difference between E and k?

I'm studying for an exam, and have come across a question I don't. really understand The question gives us a back-emf constant and asks for a rated back-emf. Now I know that the back-emf constant is ...
0
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0answers
12 views

Replicating a handheld gimbal remote control - communication problems

I have a handheld camera gimbal and a wired remote control (USB micro to mini). What I would like to do is replicate the button presses with a microcontroller thus automating movements. So far I have ...
0
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2answers
52 views

Driving a large, noisy, free-wheeling DC motor (cooling fan)

I have an automotive cooling fan which is nominally 12v and draws about 15-25A with a BIG inductive spike at startup (will happily blow a 30A fuse). These are traditionally wired via standard ...
0
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1answer
29 views

DC Motor Rotate Direction

What are possible solutions for changing DC motor rotate direction controlled by microcontroller? I know that H-bridge is one possible solution, but i want to use 2 pins for control only.
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0answers
31 views

Torque of coreless DC micro motor [migrated]

I would like to build a small two-wheeled robot similar to the one shown here. In order to keep the robot small, I intend to use two coreless micro motors like the one shown bellow. The power source ...
0
votes
2answers
67 views

Calculating resistance for driving motors off Arduino

I'm planning on driving two motors off an Arduino. Here are the two motors I'm using, requiring 3VDC and 350mA. It was recommended I use this H-Bridge to control the two of them, capable of driving ...
0
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0answers
35 views

Controlling speed of a 120V DC Motor

Good day. I'm trying to control the feild of a synchrouous motor rated at 120V DC. The input to the feild is constant DC supply but i'd like to automate this process using arduino. Is there any way i ...
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votes
1answer
49 views

Battery charged over USB and powering DC motors

I need help with figuring out how to power DC motors in my project. I need to power two 12V DC motors (they are connected in series) that will be controlled with momentary switch. The idea is to have ...
-3
votes
0answers
47 views

Max number of RC motors controlled by Raspberry PI [migrated]

I have already searched the web, there are posts and articles showing how to control a servo motor or dc motor using raspberry pi. my question is what is maximum number of motors i can control using ...
0
votes
1answer
49 views

RD-ZD-25F, 220V/50W motor as a generator

I have 2 RD-ZD-25F, 220V/50W DC motors from 2 broken bread-making machines. Can they be used as a generator? I gave one with the hand few spins and I got a little bit of a shock from it. Thanks PS: ...
0
votes
1answer
100 views

How to make a high current bi-directional motor driver circuit

I have a 14.4V DC drill motor that can draw 10 amps when under full load. I need a circuit that can control the speed and direction of the motors, using an Arduino with PWM. We are using relays ...
0
votes
1answer
56 views

Motor noise interfering with I2C

I built a robot using the Arduino Due with all the sensors running at 5V over I2C. There is a level shifter on both I2C lines. The motors are controlled using a VNH5019 motor driver carrier from ...
-1
votes
1answer
45 views

Circuit for charging 3.7 volt battery using a motor rotated mechanically

I took a 5 volt DC motor, and tried to rotate it at its maximum speed by hand. During its rotation I measured the voltage at the motors i/p wires. It comes out to be 4.5 volts. Now I want to use this ...
0
votes
2answers
54 views

Sharing same battery with two dc motors and two servos

I have a 12v battery powering two DC motors through an Arduino and motor controller. The 12v battery is also powering the Arduino using the VIN pin. Now I am trying to hook up two servo motors from ...
0
votes
2answers
90 views

How to solder wires to a hobby motor

I am using the cheap 1.5-3v motors from radio shack and I try heating up the connectors on the motor, but I think they are melting inside because in one case the pole now wiggles, and the other case ...
0
votes
2answers
55 views

Can I test a DC motor by replacing the brushes with wires?

I'm troubleshooting the DC motor for a 14W Lucas windshield wiper (from a 1970 Land Rover). I tried a number of things with no luck so I'd like to see if it's a problem with one of the brushes that ...
0
votes
2answers
118 views

How much weight can a motor take before it can't run? [closed]

I bought these 50:1 gear motors for a project robot I'm building for this YouTube walkthrough series with a couple of Arduino's, two other servo motors, a motor controller and various hardware. The ...
0
votes
1answer
52 views

Car window motor control output

I'm toying around with a car window, and used this tutorial to try and make it work: https://itp.nyu.edu/physcomp/labs/motors-and-transistors/dc-motor-control-using-an-h-bridge/ I've set it up almost ...
0
votes
1answer
41 views

Double VCC across motor

I have a motor which runs in only one direction when excited by a square PWM at 500kHz with a voltage of 5.6V across the two pins of the motor. Consumption is around 100mA. I have a 1.8V square ...
0
votes
3answers
40 views

Electrical Motors

We are using 24 V brushed DC motor(total 2 pieces) and VNH5019 motor driver for voiced controllable smart wheelchair. Although 2 wheels are sourced by same voltage and current; one of them fall ...
0
votes
1answer
53 views

Power consumption when DC motor runs on battery

I have small doubt about power supply selection for a running motor. I have a small dc motor, which is rated for 12V , 3A(rated ). When the motor runs with a load 4000N, the current consumption is ...
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votes
3answers
62 views

What could be the voltage of this common DC motor? [closed]

Below is the picture of a common DC motor usually used in electronic toys. This motor is quite common so I guess someone may be knowing it's voltage and how much current it draws. I could've tested it ...
0
votes
2answers
71 views

Capacitor quenching circuit across Brush and Commutator of DC motor

To reduce the spark between brush and commutator segment there is capacitor and resistor spark quenching circuit is placed between each commutator segments. please find below images for detail idea ...
0
votes
2answers
85 views

DC Motor control setup and circuit design. 1.5Hp continuous duty @ 95v dc

I have a DC treadmill motor rated at 1.5Hp @ 95v Continuous duty, though the motor label also states that it is a 2.65HP motor and that the amperage is 21.4. I would like to be able to SAFELY run and ...
0
votes
0answers
50 views

How does the current draw of a motor work?

I have a motor from an old drill and a 2.2 amp power supply. I want to connect the motor to this power supply, but I want to check if I have a good understanding of what will happen first. Assuming ...
0
votes
3answers
54 views

CLL(Capacitor long life)capacitor filtering to reduce the current spikes

if we are using capacitor between the coomutation segments of brush dc moto then it reduces spark generation. as main function of commutation system is to reverse the current in the coil. by using ...
0
votes
2answers
79 views

How to choose suitable battery that will supply enough current?

I'm looking for a light-weight 12v battery that will drive 4 DC motors for few seconds burst at stall current (1.4 Amp each; according to datasheet). How do I know which battery will supply enough ...
0
votes
1answer
44 views

Load Torque Profile of two coupled electrical machines

I am trying to learn about the torque profile of two coupled machines. I believe that if a DC motor is driving a DC generator of identical ratings, the generator will exert rated torque on the motor ...
0
votes
1answer
77 views

Controlling dc motor in arduino with and without a load

I wonder if there is an alternative solution to this problem: I have a 3v water pump being controlled by an arduino, which pumps water out of a bucket. I would like the pump to turn off once the ...
0
votes
0answers
21 views

Noise with PWM Motor Driving Circuit

I'm using the circuit of this question: Problem with PWM motor driver The problem of the past question is solved using a 1200k resistor and lowering the frequency to 4 Khz: now I have noticed, using ...
1
vote
1answer
28 views

DC motor driving

I am using SRF-300CA-11440 DC motor in my application. ( 6V max ) (Datasheet for DC motor) For motor driving purpose I am going to use L293D dc motor driver chip. L293D datasheet suggests "The L293D ...
0
votes
1answer
36 views

Problem with PWM motor driver

I'm using my custom circuit in the figure for driving dc motors. I'm providing a PWM (25khz). While trying the activation threshold (minimum duty cycle that activates my motor) experimentally I have ...
-3
votes
2answers
104 views

Controlling a DC motor directly with Raspberry Pi GPIO without any external IC or Transistor

I need to control a DC motor without the use of an external IC or transistor with the raspberry pi GPIO. I do not need direction or speed control. All I need is the motor to controlled by raspberry pi ...
1
vote
2answers
57 views

Choosing the right LiPo Battery

I have a project that has 14 DC motors, 8 of them have 6A nominal current the rest requires 5A. I'm thinking of using 12 LiPo batteries each 5000mAh, 30C~40C, connected in parallel so that total I'd ...
1
vote
1answer
58 views

Testing an h-bridge using the power supply and/or signal generator to control a DC motor

I'm using the DRV8836 (datasheet here) from Texas Instruments and can't seem to get it to work. Does it require a PWM (pulse from the signal generator) or am I able to drive it with only the DC power ...
1
vote
1answer
37 views

Running a 4-DC motor Circuit

Currently I'm doing a project where I am simply trying to get a robot to move forward without code by using say a push button or a potentiometer. I plan on moving on to micro controller later, but ...
0
votes
3answers
84 views

Circuit design recommendation to prevent a failing regulator

I designed a PCB that contains, among other things, a switching regulator circuit and an H-bridge for a DC motor. The whole circuit is powered by a 15V Lithium battery. The switching regulator ...
0
votes
0answers
13 views

Determining V/RPM relationship based off of RPM/torque/current curve?

I am trying to determine what voltage will give me a X RPM of a motor. The motor can be found here The pdf showing the torque/RPM graph can be found here. I have an idea of how to go about solving for ...
0
votes
1answer
60 views

High Voltage MOSFET Controller - Random Failure

I have a 120V DC Motor that I need to control the speed of. I am doing this through a High Voltage PNP transistor (MJW21193) rated at 250V and 16A with a peak of 30A as I understand it from the data ...
0
votes
1answer
40 views

Stepper Motors : KG.CM Torque : Does it maintain the torque when connected to a rod?

I am currently building a machine for a school project.I have a pivot point and wish to use a stepper motor to turn the base at an angle. The base is carrying a load of approximately 10kg. I was ...
4
votes
3answers
1k views

Why do I keep burning my mosfet?

Following this question, I ended up with the following diagram to drive a custom made dc motor using Arduino (omitting the 5V and 12V power supply stages which work properly): I keep burning ...
1
vote
1answer
32 views

Current problems with DC motor interacting with a H-Bridge IC

How do DC motors work in stall I have been told (from my engineering project seminars at uni) that if your motor has a stall current of 5.6A, you should use a 5.8A fuse to cut it off after it begins ...
0
votes
1answer
57 views

Transistor based relay driver for DC motor is not working with 12V-8A DC motor?

I am trying to run a 12V-8A DC motor from pic microcontroller output pin via relays(28V-30A output rating). It only starts for a split second and stops. Where as small DC motor runs perfectly on the ...
1
vote
2answers
127 views

Drive DC Motor with H Bridge(H Bridge turns off too slow and problem with current monitor)

I have two questions about my circuit, drving DC Motor with H Bridge. The picture below shows my design and how I drive it with signals. For example, when I make the motor rotate forward, I give ...
-1
votes
1answer
66 views

How to reverse the direction of operation of the motor?

For Synchronous buck, half bridge converter, how to reverse the direction of operation of the motor? That would be great if you could explain me with the circuit diagram.