Controller for pulse width modulation circuit using AC sine wave

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

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363 21, 363 41, H02M 3335

Patent

active

060494719

ABSTRACT:
A pulse width modulation (PWM) controller suitable for use with a variety of open loop topology power supply circuits including ring generator circuits. The controller and the circuit realized therefrom utilizes an open loop topology to achieve the desired output voltage waveform. The PWM controller is suitable for realizing a plurality of different open loop converter topologies such as such as buck, boost, forward and push-pull topologies. The PWM controller is adapted to provide the required signals to control the various possible open loop converter topologies. The controller functions to generate a PWM signal that is used to generate a half wave sine wave signal. The controller includes the necessary functionality to control the duty cycle of the generated PWM signal so as to produce a full wave sine wave at the output of the output bridge circuit.

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Horowitz et al., "The Art of Electronics," Three-Terminal and Four-Terminal Regulators, Chapter 6 6.19 Switching Regulators and DC-DC Converters pp. 355-358, no date.

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