Low-loss magnet core for high frequency claw-pole-type alternato

Details Low-loss magnet core for high frequency claw-pole-type alternato Low-loss magnet core for high frequency claw-pole-type alternato

1997-12-31

2000-10-17

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310217, H02K 1922

Patent

active

061336696

ABSTRACT:
A low-loss magnetic core of the claw-pole type for use in generating electrical power with a high frequency alternator is disclosed. A rotor, driven by a shaft, is made of pairs of individual poles of alternating polarity nested radially around a shaft. The rotor poles overlap each other axially and interleave circumferentially. The rotor poles are excited by a common field coil. The pairs of individual poles are made from laminated electrical steel or magnetic steel, with laminate shapes bent and bundled together to form an open three dimensional shape vaguely similar to one and one quarter turns of a spiral shape. A stator is made of ring bundles of laminated electrical steel or magnetic steel, with internal teeth. Various arrangements of windings on the stator teeth create armature poles for multiple phases of output voltage. The low loss magnetic core allows for efficient operation at high shaft speed and allows for efficient AC excitation of the rotor for special applications.

REFERENCES:
patent: 1450521 (1923-04-01), Steinbach
patent: 2196682 (1940-04-01), Nowosielski
patent: 2243318 (1941-03-01), Rawlings
patent: 3944863 (1976-03-01), Apsit et al.
patent: 5122705 (1992-06-01), Kusase et al.
Tupper, Christopher N., "Demonstration of the Production of 60 HZ AC Power Directly From High Frequency Alternators," Ding./TR-95-01, Oct. 1995.

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