Control apparatus for suppressing a third harmonic neutral point

Details Control apparatus for suppressing a third harmonic neutral point Control apparatus for suppressing a third harmonic neutral point

1993-01-26

1994-06-14

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

318811, H02M 748

Patent

active

053215990

ABSTRACT:
The present invention relates to a control apparatus of a three-level inverter and intends to provide a control apparatus of simplified construction which can suppress a fluctuation in neutral point voltage effectively. Only a third harmonic component which is particularly large in the fluctuation in neutral point voltage is suppressed, a third harmonic component for suppression has a ratio of amplitude to that of a fundamental wave and a phase which are set to be constant regardless of the inverter frequency, and this third harmonic component is applied to a command of the fundamental wave.

REFERENCES:
patent: 3775663 (1973-11-01), Turnbull
patent: 4757434 (1988-07-01), Kawabata et al.
patent: 4799139 (1989-01-01), Kahipuro et al.
patent: 4953069 (1990-08-01), Braun
patent: 5227963 (1993-07-01), Schauder

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