초록 ▼

A brushless generator provides increased output by providing air-core coils (936,956) in place of ferrous coils in regions of the generator which operate at high frequencies. The air-core coils (936,956) enable the generator to rotate at speeds in excess of 24,000 rpm while continuing to operate eff

A brushless generator provides increased output by providing air-core coils (936,956) in place of ferrous coils in regions of the generator which operate at high frequencies. The air-core coils (936,956) enable the generator to rotate at speeds in excess of 24,000 rpm while continuing to operate efficiently because core losses, due to the use of traditional iron cores (e.g., hysteresis and eddy-currents), are virtually eliminated. In preferred embodiments, rotating air-core coils (936) pass through stationary electromagnet fields (920) that induce amplified AC currents in the coils. The AC currents are rectified (950) and fed to rotating electromagnets (922) which create rotating fields. A second set of air-core coils (956) is oriented such that they pass through the rotating fields, which induce an AC voltage which may be used as the output of the generator.

대표청구항 ▼

[ I claim:] [1.] A brushless generator (10) having an input (34) and an output (64), said generator (10) comprising:a stationary assembly including at least one non-rotating electromagnet (24) and at least one non-rotating air-core coil (56), said non-rotating electromagnet (24) producing at least o

[ I claim:] [1.] A brushless generator (10) having an input (34) and an output (64), said generator (10) comprising:a stationary assembly including at least one non-rotating electromagnet (24) and at least one non-rotating air-core coil (56), said non-rotating electromagnet (24) producing at least one non-rotating magnetic field and having windings (28) coupled to said input (34), said non-rotating coil (56) being coupled to said output (64);a rotating assembly including at least one rotating electromagnet (42) and at least one rotating coil (36), said rotating electromagnet (42) producing at least one rotating magnetic field which travels in a circular path such that said non-rotating air-core coil (56) is exposed to said rotating magnetic field, said rotating coil (36) travelling in a circular path through said non-rotating magnetic fields, said relative motion of said rotating coil (36) and said non-rotating magnetic field inducing an AC current in said rotating coil (36), and said relative motion of said non-rotating air-core coil (56) and said rotating magnetic field inducing an AC voltage in said non-rotating air-core coil (56);a conversion circuit (50) mounted in said rotating assembly, said conversion circuit (50) having an input (70) coupled to said rotating coil (36) and having at least one output (44) coupled to windings (48) of said at least one rotating electromagnet (42), said conversion circuit (50) converting said AC current to a substantially DC current; andflux compression members (780, 782, 784 and 786) of electrically conductive material characterized in that said flux compression members (780, 782, 784 and 786) provide opposing magnetic fields which substantially cancel selected magnetic fields generated in said brushless generator (10).