Hello Adafruit,
I recently purchased two electromagnets (Product ID: 3874 and 3875) to use in my project. Unfortunately, they aren't effective for my project. I have decided to build custom electromagnets that would be more effective. Would it be possible to know the following technical details for the two electromagnets mentioned above?
1. Dimension of the core.
2. Number of windings.
3. Max Voltage and Current the electromagnets can handle.
I couldn't find these details in the dataset.
Thank you in advance.
Technical Information about Electromagnets 3874 and 3875
Moderators: adafruit_support_bill, adafruit
Please be positive and constructive with your questions and comments.
- fgirib2
- Posts: 1
- Joined: Wed Jun 22, 2022 4:12 pm
- adafruit_support_mike
- Posts: 67446
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Technical Information about Electromagnets 3874 and 3875
We don't make those, and don't have any design information for them.
There are electromagnet design calculators (search term 'solenoid force calculator'), but the reality of building them involves parameters that tend to be poorly specified, like the permeability of the steel, its sheet resistance, the eddy currents that are likely to be induced in it for a given amount of magnetic field strength, and so on. The theory will give you a general idea of the relative effect of changing parameters (force is proportional to the square of the current and the number of turns, and directly proportional to the area enclosed by the current loop), but hitting a specific value will be a process of trial and measurement with specific materials.
There are electromagnet design calculators (search term 'solenoid force calculator'), but the reality of building them involves parameters that tend to be poorly specified, like the permeability of the steel, its sheet resistance, the eddy currents that are likely to be induced in it for a given amount of magnetic field strength, and so on. The theory will give you a general idea of the relative effect of changing parameters (force is proportional to the square of the current and the number of turns, and directly proportional to the area enclosed by the current loop), but hitting a specific value will be a process of trial and measurement with specific materials.
Please be positive and constructive with your questions and comments.