Contents
How do you control the strength of an electromagnet?
Easy On/Off. Besides their strength, another pro of electromagnets is the ability to control them by controlling the electric current. Turning the current on or off turns the magnetic field on or off. The amount of current flowing through the coil can also be changed to control the strength of the electromagnet.
Is there a limit to how strong an electromagnet?
Superconducting electromagnets can produce stronger magnetic fields but are limited to fields of 10 to 20 teslas, due to flux creep, though theoretical limits are higher. For stronger fields resistive solenoid electromagnets of the Bitter design are used.
What is the holding force of an electromagnet?
Basically, electromagnets or solenoids are devices that generate a magnetic field by means of an energized coil, guiding it through suitable iron parts with air gap. Here, magnetic poles are created inbetween which a magnetic force of attraction, the magnetic force, prevails.
How can I control an electromagnet with Arduino?
This previous question Controlling an electromagnet with Arduino deals with binary control (ON or OFF) only. On my side I need to choose the strength of the magnetic field. It is a home made electromagnet, I managed to power it with 12V DC + a 5ohm resistor which gives around 2Amps.
How to control high current loads with an Arduino?
Here is a tutorial on controlling high current loads with a transistor and an Arduino. Here is a similar tutorial that powers a motor with an H-Bridge instead. To use these tutorials simply replace the motor with your electromagnet. It shows how to use external power sources and everything.
Can you control an electromagnet from a microcontroller?
Although I have never controlled an electromagnet from a microcontroller before – I have controlled high voltage loads, so the same principle applies. You can use discrete componets such as transistor pairs or you can use something called an HBRIDGE to drive the high voltage/current application.
Can a transistor pair drive an Arduino motor?
You can use discrete componets such as transistor pairs or you can use something called an HBRIDGE to drive the high voltage/current application. Here is a tutorial on controlling high current loads with a transistor and an Arduino. Here is a similar tutorial that powers a motor with an H-Bridge instead.