Obtaining maximum energy from aero-generator by imposing a rotor speed such that the air speed downstream of the rotor housing times root three equals the airspeed upstream of the rotor housing

摘要

The generator which may be air or fluid operated has a rotor and blades (2,3) within a housing (5) which allows the air or fluid flow to increase in section (S2,S1). The rotor produces power through a power take-off (6) and the rotor speed is controlled by a brake (9) which is preferably electrical and regenerative. The operation of the brake is governed by fluid speed sensors (11,12), a factor (14) and a comparator (10)