Protective inductive devices with increased ability to absord vo

Details Protective inductive devices with increased ability to absord vo Protective inductive devices with increased ability to absord vo

1986-12-18

1988-07-26

Tolin, G. P.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361111, 361118, 336175, 336233, H02H 320

Patent

active

047604840

ABSTRACT:
An inductive device composed of a bead of magnetic material, such as ferrite, has an aperture through which an electrical conductor is adapted to pass. The bead is formed unsymmetrically about at least one axis. The asymmetry of the bead alters the magnetic characteristic of the bead so as to increase its ability to absorb volt-seconds on the conductor and thereby prevent destructively high currents. The inductive device is advantageously used in the d.c. supply to the power transistors of an inverter to protect the transistors from current surges due to the simultaneous conduction of the transistors.

REFERENCES:
patent: 2594890 (1952-04-01), Ellwood
patent: 2762861 (1956-09-01), Somers
patent: 3303449 (1967-02-01), Stimler
patent: 3451047 (1969-06-01), Gutwin
patent: 3924223 (1975-12-01), Whyte et al.
patent: 4213082 (1980-07-01), Wisner et al.
patent: 4434396 (1984-02-01), Montague
patent: 4636163 (1986-12-01), Cooper et al.
patent: 4656451 (1987-04-01), Pomponio

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