Guys, thanks for all the input.
Because everything is inter-dependant I don’t yet know what my parameters are. But broadly speaking:
DC or AC: Its both, AC with DC offset. AC’s frequency broadly from 1,000Hz to 10,000Hz. DC offset not more than 5 V DC. Most likely DC offset 1.0…2.0V DC. AC amplitude, say 2.0V AC peak-to-peak.
Voltage - possibly I need two solutions:
2x AA battery, so V= 2x 1.2 = 2.4V DC @ about Imax < 1.0A,
LiPo battery, so V= 7.4V DC @ Imax < 6.0A
- transformer or electromagnet? Hmmmm, something in between
I need to bring magnetic field to certain level quickly hold it and drop it. And so on 1,000 to say 5,000 times per second.
OK, I’ll ask again. What are you trying to make? From what you said about making a field then dropping it quickly, it sounds like a spark or at least high voltage generator or maybe an inverter.
Concerning your last post, do you know anything at all about electromagnetics? You mention “mu-metal” and “permalloy” and “ferrite” as if they are all interchangeable.
With ferrite cores alone, there are more types (composition, working frequency, power handling capacity, etc…) than you can shake a stick at. What kind of “ferrite” do you think you can use?
Unless it’s a deep, dark secret, we need to know what you want to accomplish, otherwise no one here can give you ANY useful information.