| http://www.w3.org/ns/prov#value | - For example, permanent magnets 80 are mounted on a support 82, which is controllably moveable, such as through rotation, reciprocation, vibration or other movement, so as to permit the magnets to periodically vary a saturation level of at least a portion of the secondary magnetic circuit, to appropriately control power winding 22 as described above.
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