Permanent magnet generator with output power adjustment by means

Details Permanent magnet generator with output power adjustment by means Permanent magnet generator with output power adjustment by means

1975-04-09

1977-05-24

Duggan, Donovan F.

Electricity: single generator systems

Generator control

Magnetic structure

310214, 310190, 322 49, H02P 940

Patent

active

040258408

ABSTRACT:
The instant invention relates to a simple arrangement for adjusting the output power of one or more selected windings of a multiple winding, single phase Permanent Magnet Generator (PMG) without changing the magnetization of the rotor and without modifying the main stator magnetics. Magnetic shims are inserted selectively into one or more of the stator slots and shunt increasing amounts of flux as load current increases, thereby reducing the output of the selected windings without in any way affecting the output of the remaining windings. Alternatively, such magnetic shims may be used to adjust the output of single phase, single winding PMG's that have rotors made of Rare Earth Cobalt permanent magnets which, unlike conventional magnets, cannot be demagnetized.

REFERENCES:
patent: 1605112 (1926-11-01), Huggins
patent: 1684255 (1928-09-01), Bergman
patent: 2640956 (1953-06-01), Buchanan
patent: 2922058 (1960-01-01), Bacon
patent: 3035195 (1962-05-01), Jann et al.
patent: 3214675 (1965-10-01), Foster
patent: 3900749 (1975-08-01), Carriker

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