Variable performance axial flow ducted fan with high efficiency and reduced current drawn

A fan system comprising:

• a housing for mounting fan components and comprising of an airflow inlet, airflow outlet, means to control field reversal, stator mounting apparatus and main axle mounting apparatus;
• an electric motor rotor and fan assembly mounted in the housing, comprising a main axle, a blade mounting hub, a plurality of variable pitch fan blades, a rotating duct, a plurality of magnets;
• the main axle extending along an axis defined between the airflow inlet and airflow outlet;
• a blade mounting hub coaxially disposed along the main axle within the fan duct;
• the blade mounting hub supported by at least one first inner bearing and race;
• the blade mounting hub supporting the plurality of fan blades evenly spaced around the blade mounting hub;
• the plurality of fan blades forming an axial flow fan;
• a rotating duct mounted on an end tip of each fan blade;
• the rotating duct supporting a plurality of evenly spaced excitation windings;
• a stator fixed in the mounting housing;
• the stator having a plurality of evenly spaced permanent magnets;
• the stator mounted such that the rotor assembly rotates freely within;
• a means to reverse current responsive to the field reversal control means and thus reverse a magnetic field so as to apply force to the outer duct wall and electromagnets mounted thereto in relation to the stator to drive fan rotation;
• a permanent magnet motor to drive fan rotation.