Switched mode power supply for single-phase boost commercial AC

Details Switched mode power supply for single-phase boost commercial AC Switched mode power supply for single-phase boost commercial AC

1991-06-28

1993-10-19

Voeltz, Emanuel T.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 25, 363139, 307 101, 307151, H02M 3337

Patent

active

052551792

ABSTRACT:
A DC to AC power converter is disclosed which is connectable to a DC source, and including a first and second pair of switches which converts the DC source directly to AC by alternately switching between each of the first pair of switches at high frequency modulation, and between second pairs of switches alternately switching at each of the half cycles of the low frequency fundamental output voltage, for producing a positive pulse train and a negative pulse train. A transformer boosts the source voltage to the desired high voltage of the output of the converter circuit. A filter is connectable to an AC load and having a plurality of damping modes for extracting fundamental frequency from the output of the transformer, and having a control responsive to a signal for switching between damping modes. A sine wave oscillator generates a sine wave at the fundamental frequency. Feedback circuits maintain the AC output at the fundamental frequency.

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