High frequency AC magnetic devices with high efficiency

Details High frequency AC magnetic devices with high efficiency High frequency AC magnetic devices with high efficiency

1989-05-16

1990-03-20

Salce, Patrick R.

Electricity: power supply or regulation systems

Including a transformer or an inductor

323356, H01F 2742

Patent

active

049104527

ABSTRACT:
Efficient high frequency operation of magnetic devices is achieved by utilizing ferrites that have a low power dissipation hysteresis characteristic and by designing these magnetic devices to operate within an operational range where all applied magnetic forces to the magnetic core have a substantially linear constant permeability response. Within this operational range the hysteresis loop of the selected ferrite material approximates an ellipse with very little area encompassed between the increasing and decreasing B-H locus of the hysteresis loop. The cyclic energy dissipation is significantly reduced as compared to conventional magnetic operations and high frequency operation can be achieved with very high efficiencies.

REFERENCES:
patent: 4449174 (1984-05-01), Ziesse
patent: 4605999 (1986-08-01), Bowman et al.
patent: 4685041 (1987-08-01), Bowman

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