BULK LAMINATED AMORPHOUS METAL INDUCTIVE DEVICE

摘要

A bulk amorphous metal inductive device comprises a magnetic core having at least low-loss bulk ferromagnetic amorphous metal magnetic component forming a magnetic circuit having an air gap therein. The device has one or more electrical windings and may be used as a transformer or inductor in an electronic circuit. The component comprises a plurality of similarly shaped layers of amorphous metal strips bonded together to form a polyhedrally shaped part. The low core losses of the device, e.g. a loss of at most about 10 W/kg when excited at a frequency of 5 kHz to a peak induction level of 0.3 T, make it especially useful for application in power conditioning circuits operating in switched mode at frequencies of 5 kHz or more. The component is fabricated by a process comprising cutting laminations of the requisite shape. The cut laminations are stacked and registered, and then bonded by and adhesive agent. The cutting of laminations is advantageously done with stamping or photolithographic etching techniques. The inductive device is easily customized for specialized magnetic applications, e.g. for use as a transformer or inductor in power conditioning electronic circuitry employing switch-mode circuit topologies and switching frequencies ranging from 1 kHz to 200 kHz or more.