Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1995-06-19
1997-03-11
Hecker, Stuart N.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 98, H02M 112
Patent
active
056108060
ABSTRACT:
A method and/or apparatus for converting voltage using a pulse width modulator and an inverter/converter, the inverter/converter including three legs and a triangle signal generator providing a triangle signal having a peak magnitude. A plurality of sinusoidal reference signals are provided which are displaced from one another by a phase angle. The absolute values of the maximum and minimum values of the reference signals are detected, if the absolute value of the maximum signal is greater than or equal to the absolute value of the minimum signal, the maximum signal is subtracted from the peak magnitude to produce a modifier signal. If the absolute value of the maximum signal is less than the absolute value of the minimum signal, the inverted minimum signal is added to the negative of the peak magnitude of the carrier to produce the modifier signal. The modifier signal is added to each of the sinusoidal reference signals for providing a plurality of modified reference signals to the inverter/converter, one modified reference signal provided to each leg.
REFERENCES:
patent: 4920472 (1990-04-01), Handler
patent: 5091841 (1992-02-01), Tuusa
patent: 5153821 (1992-10-01), Blasko
patent: 5329217 (1994-07-01), Kerkman et al.
Blasko Vladimir
Kaura Vikram
Allen-Bradley Company Inc.
Hecker Stuart N.
Horn John J.
Jaskolski Michael A.
Miller John M.
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