Mu-metal Transformer Core
Most recent answer: 07/20/2013
- Moe (age 20)
Fort Collins,CO
Mu-metal has another drawback for use as transformer cores. It is electrically conducting. That means that one needs to be careful about the geometry of the core to avoid losing energy to eddy currents. Still, by using suitably arranged strips, "laminations", that problem can be avoided.
The easy-saturation problem requires transformers in which the magnetic field never gets very large. With a big enough core cross-section, and lots of coils, one can still manage to get big magnetic flux and hence big EMF's. However, combining these constraints means that it's a nuisance to use mu-metal cores for most applications. They are used, however, for good transformers for low-level signals.
Mike W.
(published on 07/20/2013)
Follow-Up #1: mu-metal cores
- Moe (age 20)
Fort Collins
It sounds like we're in agreement. You may end up with excellent transformers, but they will be bulkier and more expensive than typical ones for routine use.
Mike W.
(published on 07/21/2013)