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For the term "linear magnetic accelerator with toroidal shape".

Resonance Effects: Tesla Bifilar Coil Alternating Field Rotating a Magnetic Compass

Here’s a little illustration of an interesting phenomenon. A small magnetic compass is placed onto a Tesla Bifilar pancake coil, and the coil is driven by an alternating square wave at a frequency that…

Steorn motor v2: Measuring the current lag in the toroidal coil and fine tuning

Here a very interesting experiment which shows the current lag in the toroidal coils of the stator while the rotor magnet is turned by hand. This is a good method to wind the position where the coils must be energized by the controller.