초록 ▼

A switched AC to AC converter circuit comprises a rectifying circuit, which generates a rectified output signal from an alternating input voltage signal, and a switching circuit for controllably switching the polarity of the output from the rectifying circuit to generate a quasi-sine wave or a stepp

A switched AC to AC converter circuit comprises a rectifying circuit, which generates a rectified output signal from an alternating input voltage signal, and a switching circuit for controllably switching the polarity of the output from the rectifying circuit to generate a quasi-sine wave or a stepped wave output voltage signal. The switching circuit is included in the rectifying circuit to form a switched rectifier. The switched AC to AC converter controls the integral number of half input wave cycles comprising a half cycle of the quasi-sine wave output in order to maintain the frequency and root mean square (rms) voltage of the output signal between predetermined limits. The switched AC to AC converter further controls the shape of the output voltage wave output to provide instantaneous control over the maintenance of the rms output voltage.

대표청구항 ▼

[ What is claimed is:] [1.] An AC to AC converter circuit for generating a quasi-sine wave electrical signal, comprising:a rectifying circuit which generates a rectified output signal from multi-phase alternating voltage input energy source; andswitching means, operatively coupled to the rectifying

[ What is claimed is:] [1.] An AC to AC converter circuit for generating a quasi-sine wave electrical signal, comprising:a rectifying circuit which generates a rectified output signal from multi-phase alternating voltage input energy source; andswitching means, operatively coupled to the rectifying circuit and including at least one switching device associated with each voltage phase arranged to switch each voltage phase individually, for controllably switching polarity of the rectified output signal to form a quasi-sine wave electrical signal having a selected alternating period and a selected voltage level, the selected voltage level of the quasi-sine wave electrical signal being approximately zero for approximately one third of the particular alternating period and approximately a peak voltage level for approximately two thirds of the particular alternating period under stable load conditions.