magnetic field strength is 1/r^3 approximately so yes it could work even if B field is zero in total but not for each wire.. in meyer patent emf is induced in each wire and the current induces the magnetic field inside the toroid .. in my drawing the same happens but I use the bemf from the secondary , one coil has opposite velocity from the other, if you add one third coil and put the secondary inside the toroid it's exactly the same but it uses the bemf from the coils to induce current in the toroid.. unfortunately lenz law still applies in my drawing ..\\\\ the magnetic field of the toroid itself and fields inside are contained inside the toroid , in the case of meyer the fields are perpendicular and can't affect each other.