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Results tagged with magnet
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user 50733
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U Electromagnet Optimization
If you start with a U-shaped magnet, a permanent magnet, then what you have is a magnetically 'hard' material. Its permeability will be low, and it will have a retained magnetic field. … A stack of Es from a dismantled Es and Is transformer makes a good magnet core. …
- 174k
6
votes
Accepted
Is it possible to smooth out a power signal from a magnet being dropped through a coil?
Unfortunately a 'typical' coil with 'typical' magnet strengths and speeds will produce a fairly low voltage, so ordinary rectifier diodes will eat most of your generated voltage. … In a DC permanent magnet generator, the 'rectification' is done by switches, cleverly sequenced by being mounted on the same shaft as the coils, in an arrangement called a commutator
1 Diodes actually …
- 174k
6
votes
Construction for a homogeneous field using permanent magnets
You'll get a field. It will produce a fairly uniform field, for some values of 'fairly' that you may not recognise. There are FEMM solvers, some free, that will show you how horribly non-uniform a fie …
- 174k
2
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Accepted
Off-the-shelf electromagnet with deterministic pole
However, what you've shown there is a 'pot' magnet, with both poles on the same face. …
- 174k
1
vote
Accepted
Electromagnet design and powering it up? (Fault prevention of DC supply for a small coiled E...
To get maximum strength from the magnet, you need to (a) wind as much copper on there as possible and (b) dissipate as much power in it as it will allow. … A series resistor will simply increase the voltage needed at the power supply for any given magnet current, so avoid it in the final design. …
- 174k