Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

Filter by
Sorted by
Tagged with
1
vote
3answers
9k views

Can a motor driver for 5V be used for a 24V motor?

I’m controlling a 5V motor with Arduino but need more torque which means a more powerful motor. Here is my scheme. (I took it form a tutorial): Here Arduino is controlling a 5V unipolar stepper motor ...
0
votes
2answers
185 views

What type of electric motor drive can be used for keeping a load at specific heights? [closed]

We are planning to adjust the level of a load (around 50 kg) by using an electrical motor. Now we are using a hand crank and we want to get rid of this manual process. For example we want to ...
2
votes
4answers
1k views

How to use a SN75441 h-bridge (not working as expected)

I am trying to figure out how to use an SN75441ONE h-bridge. I have it hooked up like this: Pins 1, 8 and 16 are connected to the positive rail (+5 V). Pins 4, 5, 12 and 13 are connected to ground. ...
2
votes
2answers
7k views

Need opinions on servo motor control for heavy applications

I want to control a servo motor using Arduino and sensors. But all the example schemes or tutorials so far I found are for motors used in toys, low power applications. My task is to control a servo ...
0
votes
4answers
841 views

Can I buy a motor that vibrates or pulses very precisely?

I'm trying to make an item with a number of pads that will pulse individually or in sequence with a given signal. I have looked at vibration motors but these are like the ones in video game ...
1
vote
1answer
537 views

power connections for electric motor

Recently, I harvested a fist-size electric motor from an old portable space-cooler (an air-conditioner on wheels). The motor has nothing written on it at all; brand nor specs. It has 5 (five) ...
0
votes
1answer
9k views

Single Phase fan induction motor current flow

I have dissemble a induction motor in a fan. It look like follows. I have no expereince in this field. When I tried to understand it's current flow, I got these questions. What is the main winding ...
0
votes
3answers
3k views

Speed control of a DC motor using variac

I have a offset printing machine and it's original electrical design uses a variac device to control it's speed (RPM) value of the main motor drive. I don't have access to any electrical wiring ...
3
votes
7answers
3k views

Does anyone build 100k RPM alternators?

What I'm contemplating is the practicality of building a direct drive turbine-alternator (or generator) system out of an engine something like this. Based on some reasonable guesses, that would take ...
1
vote
1answer
19k views

What is the difference between 1-phase and 3-phase motors?

I've read the wiki page on AC motors, but it's still unclear to me as to how they work. I'm looking at motors for a project and need them to be able to have their speed controlled by a light dimmer (...
4
votes
1answer
2k views

Half-H bridge or low-side MOSFET for PWM motor control

I'm driving a DC motor (12 V, approx. 4 A) and I need to control the speed by PWM but I need one direction only and braking is not required. My question is: is there any advantage to using a half-H ...
0
votes
1answer
171 views

What is this equipment called?

In this video at 0:40, what is the equipment he is using to power the motor? It seems to be some sort of torque leveraged device (forgive my ignorance). http://www.youtube.com/watch?feature=...
1
vote
1answer
4k views

What's the best method for generating 5V at 2A?

I'm trying to make a crank DC charger. I understand the voltage regulation circuitry and (if needed) the bridge rectifier circuitry, but I'm still a total noob. I'm wondering what is the best/...
1
vote
1answer
208 views

Electromotor for large platform

For a design project I am designing a plastic platform with a steel construction under it, which has a diameter of 4 meters which is able to support 15 persons. The platform should be able to rotate ...
0
votes
3answers
10k views

Small Powerful Brushless Motors

Boostedboards.com says they use twin brushless motors, total 2000W Anybody know what they are? where I could get a couple? Guesses or pointers welcome, I'm not really familiar with small electric ...
-2
votes
2answers
403 views

Radio Control Electronic Schematic

My friend, who is interested in jet engines and welding is getting is working on a jet car, or something along that lines. I am just working on the electronics because I like the circuit building and ...
11
votes
4answers
16k views

Explanation for Differing Stator Winding Orientations

As a layperson, I'm trying to understand the basic configuration for an induction motor or generator. I've looked at many diagrams and photos/cutaways of stator wiring and I've noticed two different ...
5
votes
1answer
2k views

How to drive stepper motor at maximum speed with a higher voltage power supply in hand?

I had a question about "Wantai" Stepper Motor with an Arduino hooked up to an motor-shield. Looking at the spec sheets the max volts and current allowed in that particular stepper motor is 3V and 2A. ...
4
votes
3answers
7k views

DIY small motor that turns for x seconds every y seconds

I'm a civil engineer, hiker, and hobby photographer. I am trying to build a little device that gently turns a small motor on every x seconds, keep it on for y seconds, and stop it for z seconds. For ...
1
vote
1answer
2k views

Automatic Rotating Platform [closed]

I would like to build a very simple, circular wooden platform that rotates automatically - no stopping. The torque is not very important, as it doesn't need to support much weight. As far as rpm, ...
1
vote
2answers
120 views

What part/actuator do you think they used

At around 2:20 in this video there is an interesting use of electronics. You can watch the video but in short there are these little spoon creatures that pop out from behind a covering. The speed at ...
15
votes
3answers
33k views

Control differences between ac induction motor and brushless dc motor?

I have a fairly solid background in industrial AC motor control (soft starters, VFDs, etc.) but something that I'm certainly NOT well versed in is brushless DC motors... the type found in every hard ...
14
votes
2answers
3k views

How is this design for a basic PCB pick and place?

I have zero experience with any serious mechanical design, but out of necessity and curiosity, I'm attempting to build a pick and place machine (for my hobby projects as well as low-volume PCB ...
-2
votes
2answers
4k views

How to make a touch screen device with android OS?

I am planning to make a device which has a touch screen LCD. I have searched for solutions and i think if this device has android OS could be use for many applications. This device will be used for ...
9
votes
4answers
2k views

Methods to accurately move an object across a 2-D plane

This is the opposite/complement of my previous question, which concerned measuring the precise position of an object as it is moved/drawn by someone over a short duration. Assuming I use one of @...
1
vote
3answers
332 views

Transistor setup for large motor circuit

I am building a relatively simple circuit which essentially consists of two lead acid batteries rated at 12V and two motors rated at 12V. My original plan is to wire them all in series, and control ...
2
votes
1answer
189 views

Why is air pump making high pitch when it is overloaded?

Coming back from a nice camping trip, I noticed all air pumps made higher and higher pitch when the air bed were about to be fully inflated. It is heard like the the motor is speeding up when it is ...
3
votes
3answers
758 views

IC for converting single phase to three phase

I want to design a device to control a 0.5 HP to 3.0 HP three phase AC motor with single AC power. I need to able converting single phase to three phase. Also an three phase ac motor controller ...
4
votes
5answers
4k views

What is the slip factor for an induction generator in an island network?

Most textbooks covering induction machines cover only the motor use-case scenario. When the machine is used as a motor, the slip factor is determined by the frequency of the stator current by the ...
-2
votes
1answer
285 views

Rover 5 Robot Platform Motor Controller [closed]

I am about to purchase a Rover 5 Robot Platform from Spark Fun and I would like to know what type of motor controller I should get, and is there a controlling device instead such as a remote control? ...
2
votes
3answers
8k views

Is there any motor which moves slowly and gives strong torque?

I need a strong torque motor which move slow. However, I don't want to use gear train because gears will be damaged easily by the strong torque. Please give me some suggestion.
1
vote
1answer
221 views

Building block components for robot sensors and controllers

I'm planning on building a robot using Microchip PIC 16-bit MCUs, which I'm familiar with, and for which I have supporting hardware (demo boards, programmer, debugger, etc). After spending hours ...
2
votes
1answer
248 views

Outrunner motor

I'm building a flying copter and I've tried to control the speed of it's motors. All worked just perfect: I had a standard motor (with brushes) which had two wires, I've applied different input ...
2
votes
2answers
2k views

What to look for in a motor?

I am going to be making a small robot using a Arduino Mega ADK Rev3 with 4 motors, and about a pound of other stuff. This is the first time I'm doing any major hardware project, so I'm not really sure ...
2
votes
0answers
862 views

Router Speed Controllers [closed]

I would like to have a router speed controller that can keep constant torque at all speeds. I will be running the router at around 5000 rpm or lower. I tried a triac controlled commercial unit once ...
3
votes
1answer
6k views

Recommend motor type to turn baby rocker, into auto-rocker

Would like to convert a baby bouncer (like this one), which requires continuous manual effort to rock it, into one that use electro-mechanical means to auto-bounce. However, my aim is to make these on ...
4
votes
3answers
2k views

Multiple motor speed control with a single triac

I have a requirement where I have to control the speed of 10 motors. The motors are 230V AC single phase motors. The speed of the motors need to be increased or decreased using a electronic controller ...
30
votes
8answers
244k views

How are current and voltage related to torque and speed of a brushless motor?

I know that electric vehicles have different performances depending on battery and motor, but it's not clear how electrical and mechanical units are related. Can anybody please help? Will a 100V ...
3
votes
3answers
1k views

What is this type of motor called?

Firstly some background: I would like to make a magnetic stirrer, like the ones they use in chemistry labs: A small bar magnet sits inside the glass jar, while another bar magnet, attached to a ...
2
votes
1answer
291 views

Regulating a small clockwork synchronous AC motor

Is it possible to drive a small synchronous motor with permanent magnetized rotor to other speeds it is designed for? I tried to drive a small clockwork AC motor which is symmetrically build but ...
3
votes
1answer
155 views

determine motor amp draw before purchase

I am trying to buy a geared DC motor from a large, international auction site. However, most listings do not list the amp draw. The vast majority explain the motor like "12V 30rpm 25mm DC Gear Motor ...
2
votes
1answer
2k views

Driving low-voltage H-bridge directly from MCU

I need to drive a small (3.6V, <1A) brushed motor bidirectionally with a PIC MCU. My available space is extremely limited, so I'd like to use a single 3.6V power supply for both the motor and PIC, ...
3
votes
2answers
266 views

Controlling motors induvidually

I have four motors attached to each of the wheels of my car. Two of these motors are servo motors and the remaining two are 12V DC motors. Since I could not get a rack and pinion type steering mounted ...
6
votes
1answer
19k views

How to test brushed motor rotor coils with a multimeter?

I have a Blendtec blender that just decided to break on me. The blender has an electric brushed motor that looks like this: http://www.ifixit.com/Teardown/Blendtec-Total-Blender-Teardown/1128/2 When ...
5
votes
3answers
51k views

How do I modify a small blower motor to be variable speed?

I have a small blower motor 120 v, 1.87 amps, and I want to make it variable speed. I hooked up a dimmer switch for a light bulb but it did not work very well. I went to a electronics store and they ...
5
votes
4answers
51k views

Relationship between frequency and current

Hello I have a simple question, I was reading in my Airplane Maintence book that in AC motors are frequency sensitive (I understand that) frequency changes can cause speed changes of the armature. ...
5
votes
3answers
7k views

Using electric motor to adjust blinds?

So I'm trying to do some insane home DIY with my room blinds. I'm trying to make them adjust (go up and down) automatically. Now for this, obviously, I will need a motor. The blinds I'm working ...
1
vote
3answers
2k views

Arduino motor control

I am working on a project where I have to control a vehicle barrier gate like this: Our team has planned to work with Arduino but we are open to other suggestions. My question is, can I use a DC ...
4
votes
1answer
445 views

How can I use a transistor as a switch?

I'm trying to drive a DC motor using an external voltage source and control it using a transistor switch. It doesn't seem to be working during the simulation though. I know I must be doing something ...
1
vote
2answers
2k views

Interfacing HEDS 9700 optical encoder with AVR atmega32

I'm trying to interface an HEDS 9700 optical encoder using an HCTL-2020 IC (or anything else) with my Atmega ( atmega128, atmega32, atmega16, atmega8 or any AVR-family based microcontroller, don't ...