Controller for waveform synthesizer

Details Controller for waveform synthesizer Controller for waveform synthesizer

1978-03-27

1980-09-02

Shoop, William M.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

H02M 112

Patent

active

042209889

ABSTRACT:
A method and apparatus for producing a plurality of pulse width modulated control signals, the combination of which are pulsed representations of the pattern of a reference waveform, comprises a sine wave generating network for producing the reference sine wave, a triangular waveform generating network for producing a triangular wave, a plurality of level shifting circuits for level shifting the triangular wave to produce a plurality of triangular waves each at a different level and having a different range of amplitudes, and a plurality of comparators each for comparing an individual one of the plurality of level shifted triangular waves with each half-cycle of the reference sine wave, for producing the plurality of control signals. The control signals may be decoded by decoding networks, the decoded control signals being applied for operating a waveform synthesizer or inverter stage to produce a multitiered steplike notched waveform equivalent of the reference waveform.

REFERENCES:
patent: 3510751 (1970-05-01), Resch
patent: 3958171 (1976-05-01), Sekino

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