Offset compensation for harmonic neutralized static AC generator

Details Offset compensation for harmonic neutralized static AC generator Offset compensation for harmonic neutralized static AC generator

1977-03-23

1978-11-07

Shoop, William M.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 98, H02M 118

Patent

active

041248856

ABSTRACT:
In an inverter system using parallel transformers to generate a reconstructed sinewave by harmonic neutralization method direct current offset in any of the transformers is eliminated by shifting one edge of one of the square pulses logically determining the conduction angle of the inverter.
A hall device mounted in an auxiliary reactor connected with the primary of the transformer is used to sense flux conditions during sampling periods which are in time relation with the logic period in the control of the inverter system and the detected flux asymmetry is used to control the ON-OFF ratio of such logic period thereby to compensate for the offset.

REFERENCES:
patent: 3697855 (1972-10-01), Kernick et al.
patent: 3859583 (1975-01-01), Reed

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