Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1996-12-13
1998-06-16
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310190, 310 67R, 310181, 310191, 310198, 310156, 310209, H02K 127
Patent
active
057676011
ABSTRACT:
A permanent magnet electric generator has a raised output as compared with the output of a similar conventional permanent magnet generator in which the polar arcuate angle of the permanent magnets is equal to the polar arcuate angle of controlling magnetic poles. Electricity is generated in armature coils 16 by the rotation of permanent magnets 8 of a rotor 4. Controlling magnetic poles 9 formed of a magnetic material are interposed between the permanent magnets 8 of the rotor 4, and a field controlling coil 17 is provided on a stator 11. The value of the polar arcuate angle .theta. m of the permanent magnets 8 divided by the sum of the polar arcuate angle .theta. m of the permanent magnets 8 plus the polar arcuate angle .theta. p of the controlling magnetic poles 9 is set at 0.55 to 0.7. The generator provides an increased output as compared with a permanent magnet generator having the same physique as that of a generator in which all field magnetic poles of the rotor 4 are constituted by permanent magnets and wherein the polar arcuate angle .theta. m of the permanent magnets 8 is equal to the polar arcuate angle .theta. p of the controlling magnetic poles 9.
REFERENCES:
patent: 3411027 (1968-11-01), Rosenberg
Mitsuba Corporation
Stephan Steven L.
Tamai Karl E.I.
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