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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2answers
47 views

How can I calculate DC motor continuous current?

I have some information for a brushed DC motor: ...
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1answer
24 views

Correct MOSFET choice for brushed DC motor

I'm looking for a few MOSFETs for a really small motor. This question is exactly what I am asking but I'm afraid this might be marked as a duplicate. Basically, I have really small motors rated more ...
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2answers
57 views

DC motor exception

What happens to our DC motor if we stop motion of the rotor with our hand while motor is active? Will the motor burn? Why, what is really happening in that situation?
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0answers
23 views

H-Bridge Motor Stuttering

I've built a little 2-wheel robot connected to a Raspberry Pi and I'm attempting to drive it using a SN754410NE H-Bridge. It's plugged into a 9V/650mA power plug. When I run either motor on its own ...
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3answers
74 views

12v dc motor rotate once and then stop

Can anyone suggest the best way to get a 12V DC electric motor (70RPM) to rotate roughly 360 degrees and then stop? So the process would be; Power switched on. Motor rotates once, then stops. Power ...
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3answers
66 views

How does voltage and current affect speed and torque of a motor?

I have a motor attached to a foam wheel (made of insulation material). The wheel is VERY light, yet the motor I am using cannot handle the torque required to run it, resulting in the motor creating a ...
1
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0answers
29 views

In field controlled dc motor, why does the armature current remain unchanged even if it is affected by field flux?

Basically in a field controlled dc motor, the armature current is kept constant (via some constant voltage source) while the field current is varied which will vary the field flux and interacts with ...
1
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1answer
80 views

When to use or not an optocoupler

I understand the benefits of optocouplers. Always when I'm designing a microcontrolled motor control I isolate the mains from the MCU with those devices. On a few designs I did without the optical ...
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1answer
27 views

The Hall sensor in a BLDC - winding magnetic field interference?

I am wondering what is the impact of the magnetic field generated by the BLDC windings being energized on the rotor position measurements with the Hall sensor. I found some unclear explains stating ...
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2answers
66 views

Why don't we consider the voltage drop due to inductance of conductors in dc motors? [closed]

In a dc motor, V = Eb + Ia.Ra why don't we add the effect of inductance of coils.
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0answers
69 views

Reverse 12V dc motor with 2 buttons that are ground buttons when pressed

I bought a small navigation system screen from ebay that I would like to install in my car. I want to put this in my car for a car pc. The screen has a small 12V DC motor that opens / closes with the ...
1
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3answers
57 views

How to lower the rpm's in small a DC motor

I make Christmas Ornaments for a living. I have an idea that is a tube that is 18" tall, 6" dia. and I need it to slowly spin at around 5-10 rpm. Please keep in mind that I need this to be as cheap as ...
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3answers
51 views

Speed Control for a 12v DC PC Fan for Magnetic Stirrer

I working on mini project to create a magnetic drink stirrer out of an old PC Case Fan. (For those that don't know, a magnetic stirrer is basically a spinning magnet under your glass and a magnetic ...
1
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3answers
73 views

'center bore' motor?

What I mean by this is a motor with a large hole in the middle, instead of a shaft. Some motors I found allow to easily remove the shaft, but the bore/shaft diameter I need (at least 4 cm) and RPM ...
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1answer
59 views

Braking of Motors

Is an induction motor delivering or drawing mechanical power in the braking region? . according to the torque slip curve of an Induction motor,torque is positive and the motor continue to rotate in ...
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0answers
44 views

pre-soldered DC motor?

I am a complete Arduino noob and I bought the arduino starter kit, it comes with a 6V DC motor with wires already soldered onto it. The ground wire solder broke and because I don't want to solder it ...
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2answers
78 views

How to change speed of dc motor using potentiometer?

I want to change the speed of a DC motor(12V,2000RPM) using a pot and operate a table fan(where I've replaced its AC motor with DC).Now the problem is I get a regulated output at o/p of 7812 but not ...
2
votes
1answer
59 views

Controlling a 8A DC pump with a PIC

I need to activate a 12VDC, 8A diaphragm pump with the output of a PIC16F628 (5VDC, 0.025A maximum). The standard way to do it, as I learned in college, is to saturate a transistor that will drive a ...
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1answer
53 views

PID controller DC motor Design using simulink [closed]

After playing the circuit, this circuit is showing the error. Tell me what is error in this circuit and what should be the P, I and D values for PID. ??? in block is not any error. It showing because ...
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2answers
66 views

What are the consequences of connecting two motors in parallel?

I am using two DC motors rated at 36V and maximum current draw of 5A. To reduce the number of motor-controllers, I am planning to connect them in parallel. The two motors are required to run at the ...
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3answers
41 views

Regulating D.C. motor - Feedback

I purchase the following hobbyist motor: http://www.digikey.ca/product-detail/en/PKN12EB105C1/P14353-ND/2417077 How can I get a feedback from this motor? The design of D.C. motor that I found on ...
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2answers
96 views

AVR to drive 12V 1A motor

I have AVR that needs to drive 12V 1A motor. I always used NPN BJTs (2N2222), but reading the datasheet says the MAX is 1A (which means I cannot use it here). Instead, I willing to use MOSFET. I have ...
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1answer
35 views

Can I constantly run motors for an extended periods of time?

I want to run a small DC Pittman gearhead motor rated at 12VDC continuously for an art piece. Can the motors withstand running 12-14 hours on a lower than 12v? The load is very small.
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0answers
81 views

Monster moto shield + Arduino +Pololu 12V, 29:1 Gear Motor Encoder hardware problem

Overflow enthusiasts! I am trying to build a balancing robot with two wheels, using the polulu gear motor as mentioned above. In order to have a strong motor driver,the monster moto shield is used in ...
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1answer
32 views

PIC reset with PWM

I'm using a PIC18F4550 to control a DC motor with PWM. When I use a PWM of above 50% it works well, but when it starts to go below 50% the PIC resets. I have separated supplies for the PIC and the DC ...
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1answer
39 views

Strange oscillation when drving motor with PMOS

I am trying to drive a 24V DC motor with IRF5305 PMOS. I am generating ~300Hz PWM signal with an AVR microcontroller and level-shifting it to 12V-24V signal to drive MOSFETs gate. I need to use a PMOS ...
0
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0answers
74 views

Brushed or Brushless DC motor for self balancing robot?

I am looking to balance a robot using a flywheel connected to a DC motor (think of it as an inverted flywheel pendulum). Similar to this: https://www.youtube.com/watch?v=0312BNqIBFI What I am unsure ...
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2answers
162 views

Driving DC motor using a single MOSFET, why does the motor spin without applying a gate voltage?

The arduino drives the gate of the mosfet (irf540n) just fine (I've tested it with an led + 100 ohm resistor) and now I want to drive a small dc brushless motor. I've connected everything properly but ...
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votes
1answer
69 views

can i increase my adapter current? [closed]

i have an adapter that its output is: DC 4.9 volt and 450 m ampere i want use this adapter for running three 6 volt dc motors but the adapter output current is low, so i want amplify that. can i do ...
2
votes
2answers
204 views

Is it normal for a transistor running a motor to be very hot?

I've researched for a few hours but I'm still concerned. I'm building a very low budget quadcopter (think toothpicks) and as I've seen on this site, a D10N05 mosfet would do the job. I've visited 3 ...
0
votes
3answers
98 views

What can the ohms of a DC motor tell me about itself?

I have a lot of motors and all type of size but mainly they are all small to mid size adult hand size or so , I took out my multimeter and switch to ohms settings and grabbed the ground and power ...
1
vote
3answers
116 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
94 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
26 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
56 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
15 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
votes
2answers
85 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
votes
1answer
45 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.
0
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2answers
72 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
votes
0answers
56 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 ...
-2
votes
1answer
66 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 ...
0
votes
1answer
96 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
284 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
98 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
62 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
96 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
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2answers
133 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
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2answers
68 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
169 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
88 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 ...