General Electric Company

Ljubisa Dragolijub Stevanovic

Robert Louis Steigerwald

Luis Jose Garces

Ravisekhar Nadimpalli Raju

John Norton Park

Richard S Zhang

William F Wirth

Jeffrey Neal Slotnick

An AC-AC Converter for an AC source which in one embodiment has a first rectifier section rectifying the AC source into a first pulsed DC link voltage signal and a high frequency modulating section coupled to the first pulsed DC link voltage signal and producing a high frequency AC voltage signal. A high frequency transformer is coupled to the high frequency AC voltage signal producing a transformed high frequency AC signal. There is a second rectifier section coupled to the transformed high frequency AC signal and producing a second pulsed DC voltage signal and an unfolder section coupled to the second pulsed DC voltage signal and producing an output AC signal.

AC-AC converter with high frequency link

A partial-voltage buck regulator controls a high-voltage bus to a full-bridge circuit such that overall switching losses are reduced and distributed. Low-voltage buck regulator devices are PWM-switched when high output voltage is needed, and high-voltage bridge devices are PWM-switched when low output voltage is needed. A variable input power supply, which may be operated in a high power factor mode, can adjust the input bus voltages to achieve optimum performance for a given magnetic resonance imaging sequence.

Switching amplifier for generating continuous arbitrary waveforms for

Growing community of inventors

Clifton Park, NY, United States of America

Ljubisa Dragolijub Stevanovic