One cycle control of bipolar switching power amplifiers

Details One cycle control of bipolar switching power amplifiers One cycle control of bipolar switching power amplifiers

1995-03-02

1997-04-01

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 98, 363132, 323284, H02M 3335

Patent

active

056173067

ABSTRACT:
A one cycle control for controlling DC-to-AC switching converters is achieved by forcing the average of a controlled switched variable to be exactly equal to the control reference in each switching cycle. Potential subharmonic oscillations in a switching power amplifier which occurs in the DC-to-AC application of this method is prevented by adding an offset voltage to the averaged controlled switched variable which is fed back and compared to a control reference, which compares and is then used to switch the switching power amplifier. Switching errors are corrected by resetting the integrator which averages the controlled switched variable and a time interval at least an order or magnitude less than the switching time of the switches in the switching power amplifier.

REFERENCES:
patent: 3659184 (1972-04-01), Schwarz
patent: 4862057 (1989-08-01), Contartese et al.
patent: 4947309 (1990-08-01), Jonsson
patent: 5270904 (1993-12-01), Gulcznski
patent: 5278490 (1994-01-01), Smedley

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