FIELD: off-line power supplies. SUBSTANCE: multiphase-output step-up/step- down frequency changer is, essentially, device built up of three-phase-to-single-phase converting cells each one having three input storage reactors 1 3 at input of three-phase bridge circuit built around switches 4 - 9; storage capacitor 10; output storage reactor 11; switch 12 of output storage circuit. Proposed frequency changer makes it possible to produce practically sinusoidal input current which is in phase with input voltage at high-quality sinusoidal or dc output voltage with added advantage of its reversal and ensuring of as high input power factor as unity. EFFECT: enlarged functional capabilities. 1 cl, 4 dwg
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Authors
Dates
2003-10-27—Published
2001-03-27—Filed