초록 ▼

An electrical machine includes both a permanent magnet source of field excitation and an electromagnetic source of field excitation. The electrical machine also includes a homopolar rotor, which carries the permanent magnet source, and a lamination stack having a middle portion and outer portions. T

An electrical machine includes both a permanent magnet source of field excitation and an electromagnetic source of field excitation. The electrical machine also includes a homopolar rotor, which carries the permanent magnet source, and a lamination stack having a middle portion and outer portions. The homopolar rotor and the middle portion of the lamination stack conduct flux generated by the permanent magnet source. The homopolar rotor and the outer portions of the lamination stack conduct flux generated by the electromagnetic source when the electromagnetic source is energized.

대표청구항 ▼

[ I claim:] [1.] An electrical machine comprising:a rotor assembly including a permanent magnet source of excitation, a shaft, a first ferromagnetic pole piece extending radially outward from the shaft, and a second ferromagnetic pole piece extending radially outward from the shaft, the first and se

[ I claim:] [1.] An electrical machine comprising:a rotor assembly including a permanent magnet source of excitation, a shaft, a first ferromagnetic pole piece extending radially outward from the shaft, and a second ferromagnetic pole piece extending radially outward from the shaft, the first and second pole pieces being axially spaced apart, the permanent magnet source being secured to the shaft between the first and second pole pieces; anda stator assembly including an electromagnetic source of excitation and a flux collector surrounding the rotor assembly, the flux collector having a middle portion and first and second outer portions, the middle portion being separated from the first and second outer portions by first and second gaps;wherein each portion of the flux collector includes a lamination stack, and wherein the gaps are filled by non-metallic material;the first outer portion being axially aligned with the first pole piece, the second outer portion being axially aligned with the second pole piece, and the middle portion being axially aligned with the permanent magnet source;the electromagnetic source being coupled to the first and second outer portions.