Tagged Questions

4
votes
4answers
73 views

What are the factors that significantly affect the life span of a DC motor?

I'm currently planning to run a DC motor continuously on solar power. So I would like to know which things I should be very careful about for optimum lifespan of the motor. I found the following two, ...
0
votes
0answers
50 views

Choosing the correct brake resistor for DC motor

I have a DC motor running on 24VDC rated 150W (~6,25A), how do I calculate the correct brake resistance?
1
vote
0answers
38 views

SEM Permanent Magnet DC Motor DPM 30R4 1500RPM 24VDC Output: 0-25kW & Brake

I am in the plannning stages of a project to build a pig rotiessiere. I have the above mentioned motor, but I am unsure of what type of power source is needed to run the motor and what can I do to ...
0
votes
2answers
84 views

Battery powering an unknown DC motor

I know nothing about motors. I have DC motor (sealed in a casing) that uses 6v/12v 1a (mains switching power supply) with 2.1x5.5mm DC connector. It has variable speed controller, reversible ...
1
vote
1answer
55 views

Which electro motor to use for steering a kite? (guestimation marathon)

I'm doing a pet project in which I want to fly a kite from my computer. For this to happen my plan is to build a little box hanging under the kite which includes a raspberry pi (connected to my laptop ...
2
votes
1answer
151 views

(How) can I run a microcontroller and DC motor from the same battery?

I have a microcontroller (a PIC10F200) that I'm using to control a DC motor. It's a very simple circuit. A button is pushed and the pic sends output for certain increments of time. The thought is to ...
4
votes
1answer
162 views

PIC pins change state when DC motor connected

I'm new to PIC programming, and having trouble getting getting it control a DC motor. It's a PIC18F25K22, and a TI L293D driver. Power is suppliued by a 5V linear regulator connected to a desktop ...
5
votes
1answer
179 views

How to re-magnetize a permenent magnet motor of small size (model railroad)?

I have several small DC motors where if I place an extra magnet to back-up the included magnet, the performance seems to improve significantly. These motors are 30-40 years old & their ...
0
votes
2answers
137 views

DC Motor control

I am using a DC 24v scrapped photocopier motor for a table fan. To save energy, it's ON for 2 seconds and OFF for 3 seconds using MCU. The fan keeps rotating during the power off state. Is this a ...
0
votes
2answers
125 views

DC Motor - Laptop Charger [duplicate]

Possible Duplicate: Choosing power supply, how to get the voltage and current ratings? I have a DC motor rated at 12 V which in its current application draws around 1.5 A. Currently I am ...
4
votes
2answers
291 views

Can I use a DC SSR that is switched by a PID controller to control the speed of a 12 V DC fan?

This is my first post here. Let me start by saying that I do not have an engineering background. I tinker with electronics in my spare time (Arduino, solid state low-power guitar amps, etc.), but I do ...
-3
votes
1answer
114 views

Why must the coil in a motor kit be wound in only one direction? [closed]

Wouldn't it be better to have coils going in two directions?
0
votes
1answer
148 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). ...
0
votes
1answer
267 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 ...
0
votes
0answers
66 views

Choice of an electric motor for a motorcycle [closed]

I'm new here and this seems to be the suitable place to ask for help(correct me if I am wrong). I am planning on building a motorcycle powered by an electric motor, but I am facing a big problem : I ...
3
votes
1answer
182 views

DC motor vs AC motor weight considerations

For a given power rating, does a permanent magnet DC motor have a weight advantage over either a three phase permanent magnet synchronous machine, or vice versa? Or does it work out that they would be ...
3
votes
1answer
214 views

Regulate DC-Pump throughput

Does anybody know whether it is possible to easily regulate the throughput of a DC water pump? E.g. one you would use for your pond or indoor fountain. I would like to avoid lowering the duty cycle ...
1
vote
1answer
534 views

How to tell if brushless DC motor is wired delta or Y?

I have a brushless DC motor I'm working with, do not have any spec. sheets for it. How can I determine if it's wired in delta or Y formation? There is nothing on the label that indicates this. ...
1
vote
1answer
627 views

What electric motor spec clues indicate easy speed control options?

I'm investigating HVAC fans etc to design my own system and controls, and having fully variable speed control is an important consideration to me. I'm pretty sure there are types of AC motors that ...
7
votes
2answers
1k views

Methods of filtering noise caused by DC brush motors

I am looking for any information that would help me reduce the power rail noise and EMI of DC brush motors. I am building a robot that is powered by 2 x 250 W 24V DC motors. Thank you in advance
7
votes
2answers
1k views

Can Arduino Mega handle 6 motors independently

I wonder if anyone can help me I am modifying an ROV and thinking of using Arduino Mega I am new to electronics and robotics and wonder if the Arduino Mega can control 6 DC motors independently as ...
1
vote
2answers
400 views

DC Gear motor Operation

I just bought a DC gear motor- I'm trying to spin a 20 pound disk. I realize I need to hook it up to a power source, but I'm having trouble figuring out the proper source. PS I also got a DC speed ...
6
votes
2answers
1k views

Can I combine the power supply?

Here's the circuit I'm working on, it's a robotic stringed musical instrument thing, that uses 6 DC motors and an Arduino Duemilanove - The resistors are 0.25w 1KΩ The transistors are TIP122 ...
8
votes
5answers
7k views

Very Slow Electric Motor

A customer has asked: I want to slow down a small hobby sized DC motor to a user variable range that runs from slow to zero RPM. I would simply use a wall wart for a power supply and a ...