Patent ID: 7147438
Filing Date: 2006-12-12
Classification: F04D

Abstract:
1. An electric turbine comprising: a fan with a plurality of blades each with a tip, each blade having a permanent magnet positioned in the tip, and the fan being mounted for rotation about an axis with the blades extending radially outwardly from the axis of rotation and with the tips adjacent an outer extremity; an electromagnet positioned to be magnetically aligned with the permanent magnet in the tip of each blade during one complete rotation of the fan, the electromagnet including an electric current input; a magnetic sensor positioned to be magnetically aligned with the permanent magnet in the tip of each blade during one complete rotation of the fan, the magnetic sensor including sensor signal generating structure; and a controller electrically connected to the sensor signal generating structure of the magnetic sensor and to the electric current input of the electro-magnet, the controller including circuitry supplying a pulse of current, in response to reception of a sensor signal from the magnetic sensor, to the electric current input of the electro-magnet at a time when the electro-magnet is magnetically aligned with the permanent magnet adjacent the tip of one blade of the plurality of blades of the fan.