B-field flux switcher

[DreamThinkBuild]

Hi All,

I've had this flux switching idea that has been nagging me for awhile, but no time to test it.  I'll just put the idea up here, any suggestions welcome.

If you look at your standard DC motor when the field windings are energized they create a torque to the rotor by repelling off the magnetic field. Now imagine this same effect where you don't move the field windings but only allow the path of the magnetic field to shift.

Take a heavy gauge wire and pass it through the center of a large toroid with magnets on each side to setup the magnetic field. By pulsing(+/-) the wire we are changing the path of the flux through the toroid. On the top and bottom half of the toroid we wind our pickup coils. We gain in two ways, we capture the changing flux in the toroid from the magnets and capture the B-field from the switching wire, nothing is wasted. I attached a picture to clarify.

Since we are using the B-field for the switching this could be 10ft of welding cable(0000 gauge wire/low impedance) with multiple units down the line. One pulse would activate the entire line, since the B-field is uniform along the entire length.

[poynt99]

Seems to be a somewhat novel idea; much along the lines of the MEG and other flux switching schemes.

I think you could also use small coils on the toroid itself to perform the switching. As far as I know, many variations of this have been tried, and no one yet has demonstrated OU.

.99

[Airstriker]

Seems to be a somewhat novel idea; much along the lines of the MEG and other flux switching schemes.

I think you could also use small coils on the toroid itself to perform the switching. As far as I know, many variations of this have been tried, and no one yet has demonstrated OU.

.99

I've seen something similar (patent) in the ORBO thread. I thought I had it on my harddrive but unfortunatelly not. Anyway, it's somewhere over there. But the idea presented here is much simpler and probably better. Should be easy to build and try.

@DreamThinkBuild: What software did you use to generate flux view (the colour one)?

[broli]

There might be coupling issues when the pickup coil generates current, as it's wound around the toroid which penetrates the main current loop.

[wings]

analog to Graham Gunderson ?