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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1answer
32 views

Behaviour of DC series motors

I'm having trouble implementing a DC series motor simulation, and I think this is due to the fact that I do not understand the motor behaviour itself. Notice that the mechanical part of the ...
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2answers
87 views

Is it possible to figure out the specifications of an electronics piece without datasheet?

I'm brand new on the "electrical engineering" scene with my Arduino and I have a question about random electronics. I've been taking apart some old phones, salvaging LEDs, motors and speakers, mostly ...
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2answers
54 views

Automatic 12V plant watering system?

I'm planning to make a plant watering system . There is a beeper so it will alert us when the soil is dry.I have got a 12V DC motor . So i'll be removing this beeper and i need to add this DC ...
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1answer
50 views

Can a gear motor w encoder be 60 ft away from controller?

This is my first time posting so please forgive any ignorance that may come across. I'm considering hooking up two gear motors (Devantech 24V, 49:1 Gear Motor w/ Encoder) to a motor drive (MD49 - ...
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0answers
29 views

Is the motor constant of separately excited DC motor the same as for series excited DC motor?

If I have one DC machine but I use two different excitations: separately excited and series: The formula's of the separately excited DC motor is: $$E = K \cdot wm$$ $$Td = K \cdot I_a$$ Assuming ...
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0answers
21 views

What motor driver should I use? [closed]

I'm getting 3 of these motors for a holonomic drive system on a robot (probably balancing on a ball). They have a 5A stall current and 300ma free-run at 12V. I'm having trouble finding the right ...
0
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1answer
50 views

Voltage divider on AC current?

I have a 90V PMDC motor with an triac/diac speed controller. Although, I am not sure, the power output is around 90V, but it may be higher. The torque is fairly constant, but it hiccups at the lowest ...
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2answers
37 views

DC Motor reversing relays using a micro switch [closed]

I'm looking to use relays and 1 micro switch to reverse the polarity of the circuit. I will need a simple ON/OFF switch to have the motor turning in one direction and then when the micro switch is ...
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0answers
21 views

Why doesn't this motor turn? [migrated]

When I upload the code, the DC motor makes a humming noise, but doesn't turn. ...
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1answer
32 views

Direct current Motor [closed]

a 10-hp, 220 v, dc shunt motor has armature and field resistances of 0.25 Ω and 220 Ω, respectively. when supplied from a 220-v source, it draws a current of 40 a. the total rotational losses are 450 ...
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0answers
27 views

DC series motor - changing field resistance

Suppose I have a DC series motor with an armature resistance of 0.4 ohm and field resistance 0.6 ohm. Suppose shaft torque = developed torque. Assume magnetic linearity. With a blocked rotor test of ...
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1answer
25 views

Circuit with reversing polarity and two microswitches

I am building a time-lapse camera slider with the following components 2rpm DC gearbox motor PWM with reversible DPDT switch to reverse motor 2 SPST Microswitches I am trying to wire the ...
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0answers
57 views

DC Vibration motor issues

I have a simple DC (toy) motor which I'd like to use as a vibration motor for my project. The motor is controlled with an Arduino, but powered from a separate 5V voltage source (using an 2N3904 NPN ...
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votes
1answer
65 views

How to determine DC motor voltage

I am building a new controller for an existing robot. I need to know the voltage to send the motors. I don't want to remove the motors from the robot, but am able to take measurements while it ...
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votes
0answers
29 views

Request for separately excited DC motor specification

Can anyone provide actual separately excited DC motor specifications(resistance,inductance,friction coefficent,inertia,value of constants etc..(need it for simulation purpose)?
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3answers
82 views

Circuit Starving Question

I have a circuit where 2 DC motors are connected to 4 AA batteries and being controlled by an Arduino microcontroller. Whenever the motors start, they starve other components in the circuit and it is ...
1
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3answers
106 views

Is Power consumed by a motor under various load conditions constant?

Does a motor (dc /Induction/Synchronous ) consumes more power when operating at higher load than when operating at some lower load? Or power consumption remains constant/same in both cases? What I ...
1
vote
1answer
41 views

Motor speed control mosfet

I have a Raspberry Pi and I want it to control DC motor speed. I make the pi output 3x3,3V for controlling the speed. I need circuit that works like this; when one output gives 3,3V motor have 6V, ...
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votes
2answers
102 views

Looking for a high speed, high powered motor [closed]

So I'm trying something that has been attempted before and that is to have an electric turbo charger. essentially the goal is to spin a compressor wheel (20 grams) at 150k RPMS and sustain it for ...
0
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0answers
24 views

dc motor fuzzy logic speed control

I came across this separately excited DC motor model(USING matlab) using PI control for speed control.I am having difficulty in understanding how armature voltage is kept as constant.If the model is ...
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0answers
21 views

Power DC motors via UK mains, controlled by arduino [migrated]

So I was wondering if someone could tell me of a method by which I can power a group of 12 motors via UK mains, I assume resistors or something will be needed to reduce the voltage down to that which ...
-1
votes
1answer
48 views

Dead-reckoning vs feedback for motor position control of turntable

I am constructing a small turntable that holds a plastic cup and should be controlled to stop at one of eight positions. (Where it will receive a shot of liquid; think "Auto-cocktails"). I'm wondering ...
0
votes
3answers
95 views

NPN Transistors for motor control

I wondered if someone could offer advice here. I have a 3.3v dc motor. Obviously, i can change the direction it turns by flipping the + an - leads round. Can i acheive the same thing but with 2 npn ...
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3answers
148 views

Controlling a motor using a PWM

Im trying to use a Freescale FRDM-KL25Z, I have been looking at the datasheet to see if I can find the maximum oputput current of the pins with no luck, im assuming its 500mA since its powered via ...
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2answers
57 views

How to stop my motor from resetting my microcontroller?

I'm assuming (no way to verify) that when the motor pulls too much I get voltage spikes which cuts out my microcontroller. Here's my circuit, any suggestions on how to fix this issue? The left chip ...
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3answers
181 views

Change Direction of 12v DC Motor Rotation using Relay

I want to make a circuit to change 12 Volt DC Motor direction and move some thing between two points. Using Relay or some basic limit switches.Like this Image. I got a Circuit As i want... AUTOMATIC ...
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2answers
58 views

H-Bridge flyback diode selection?

I am wanting to make a motor driver using a SN754410 Quadruple Half-H Driver IC. The SN754410 requires external flyback diodes. Here is an example circuit: My question is, how do I choose which ...
0
votes
1answer
68 views

H-Bridge vs Mechanical Speed Controller

What's the difference and trade-offs between a h-bridge motor controller and a mechanical speed controller for controlling a brushed motor in an RC car? I have a cheap RC car that I'm trying to ...
0
votes
1answer
67 views

Understanding motor controllers and example application

I'm rather new to the world of motors and motor control circuits - about all I know is that you need one. My intended application is to take a DC motor and create a "servo", which I understand to ...
0
votes
1answer
73 views

Unable to Power Arduino and DC Motors via 2 AAA Batteries

I am using 3.7 V 2000mah battery. I am stepping it up to power an arduino board via an NCP1402. It has a continuous output current of 200mA. I am trying to run two Micro Metal Gear motors with stall ...
2
votes
1answer
48 views

High Power H-Bridge with IR2125 Drivers Problem

I'm currently stuck on a problem when trying to drive a 140V DC motor using an H-Bridge with 4 high-power mosfets and 4 IR2125 drivers. I'm using as input to the drivers a signal generator of 5V in ...
1
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1answer
47 views

Does Armature current decrease as the load decreases?

I am being asked to find the speed of a 16.5kW shunt DC motor that is being supplied with terminal DC voltage of 300V when operating at 50% rated load with an armature current of 30A. I need to use ...
0
votes
1answer
32 views

Connecting two DC motors on a single driver channel

Is it a good idea to connect two DC motors on a single driver channel? Here are the motor specs: Operating Range: 6 - 12VDC · No load current: 40mA (6VDC) · No load current: 70mA (12VDC) · ...
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0answers
24 views

How to choose a single H-Bridge IC?

They all seem to pretty much offer the same features. On what basis am I supposed to compare single H-bridge IC's for a typical application of driving a smaller (<1A max) brushed DC motor, similar ...
0
votes
1answer
127 views

How to run Small Brushed Motors for Quadcopter with bare Atmega328 microcontroller?

I am trying to make a Nano Quadcopter using my Atmega328 microcontroller powered by a 3.7v 600mAh Lipo battery. I am using very Small Brushed Motors. If I directly connect motors to PWM pin of ...
1
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2answers
75 views

DC Motor drawing too many Amps

I have a treadmill incline motor that is blowing its circuits fuse every time it starts to run. This is the motor that lifts the treadmill up and down. The motor is labeled: Output: 65W Input 36VDC ...
0
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2answers
47 views

Motor for momentum wheel

I need a small dc motor for a momentum wheel. To conserve power the motor will be turned off once the wheel has reached target RPMs and left off until the RPMs fall out of the target range. This will ...
0
votes
1answer
58 views

High Side PWM motor driving circuit

I have two theoretical question about my circuit (that I have tested with a breadboard and it works, but I want to understand better some design choices): 1) As far the flyback diode is concerned, I ...
1
vote
2answers
72 views

Mosfet PWM signal not square

I'm a beginner learning about electronics, currently trying to control a DC motor using a PWM signal. I got it to work, but want to understand what I'm seeing using an oscilloscope and optimize it. ...
0
votes
0answers
33 views

Increasing terminal Voltage and increasing Load torque - DC motor

If Ia decreases the developed Torque decreases and hence looking at the Torque-speed curve shows that the speed will slightly increase (Shunt or separately excited DC Motor). Question 1 But if you ...
0
votes
1answer
73 views

Effect on loading a DC motor - load torque

Can someone please give a (detailed) explanation (perhaps with formula's) of how the load (torque) affects the armature current of a DC motor (seperately excited or shunt or series) ? As the load ...
0
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2answers
57 views

How to transfer electrical power from stationary to rotational part.that can be used for POV display?

I have been researching how to transfer electrical power from stationary to rotational part. Some of them showed the means by using slip spring rings like in this website ...
0
votes
0answers
70 views

Supply for autonomous car with sensors and DC motors

I'll be using the Guibot Motorduino for an autonomous car project. This includes L293D motor driver and 7805 voltage regulator. The other components: Multi-Chassis - Tank Version with two DC ...
0
votes
1answer
101 views

How to control a motor with a photoresistor

I have a little 2 to 5 volt hobby motor that I would like to control with a photoresistor aka photocell. What is the simplest way to control the circuit? Is there a photo resistor with enough range ...
2
votes
2answers
91 views

Controlling an electric motor through labview without knowing its speed

I'm having a little trouble running my final bachelor experiment. My group and I are to find out what exactly causes extreme high frictional forces when pulling a steel cable through wet sand by ...
0
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2answers
96 views

Why does my 24 volt DC servo motor run at 5 volt DC and not at 24 volt DC?

Why does my 24 volt DC servo motor move with 5 volt DC drawing 5 amps, but does not move with 24 volt DC? The power supply is 24 volt DC up to 10 amps. Datasheet are available for the DS4S servo ...
1
vote
1answer
70 views

“Standard orientation” for stepper motors in data sheets

I just finished getting a SOYO 6V@0.8A unipolar stepper motor working, and wanted to know more about an issue I faced while doing so. I used the stepping sequence below with an L293D chip to drive ...
0
votes
2answers
58 views

Connecting two motors

Basically i'm doing a small project where i'm using 2 dc motors on a bicycle as generators connected to a usb module to charge smart phones, is it possible to connect the motors together to generate ...
0
votes
2answers
79 views

Controlling DC motor without Arduino motor shield

I am trying to make a line follower with the help of this tutorial. In the tutorial they have used Arduino motor shield. I want to know, is there any way to control the motors without using Ardumoto? ...
0
votes
1answer
38 views

Torque control with H-Bridge via direction pin

Using the LMD18200 (H-Bridge) and the LM3524D (PWM regulator) I should design a torque regulation. I've found a circuit in the LMD18200 datasheet which uses the current feedback to adjust the PWM. ...