Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1992-05-01
1993-11-09
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 56, H02M 3337
Patent
active
052608611
ABSTRACT:
A digital controlled converter (100) for converting an input signal to a direct current signal having a clock generator (104) for generating a high frequency clock timing signal and a driver circuit (106) for controlling the passage of the high frequency clock timing signal within the converter (100). A power output stage (102) which provides an output signal is controlled by the driver circuit (106). A control loop (108) is provided for sensing and converting the output signal to a command signal. A latch (128) is utilized for latching the command signal and for controlling the state of the driver circuit (106). The latch (128) is reset at the rate of the high frequency clock timing signal and updated with the command signal to provide incremental correction to the output signal. The converter (100) comprises a transient response to variations in load proportional to the high frequency clock timing signal. In a preferred embodiment, the driver circuit (106) functions as a switch for controlling the power output stage (102). The control loop ( 108) serves to provide the command signal to operate the latch (128). A comparator (138) in the control loop compares the d.c. output signal with an analog reference signal to generate the command signal. In an alternative embodiment, the d.c. output signal is converted to a digital signal and compared to a reference digital word in a digital comparator (292) to provide the command signal.
REFERENCES:
patent: 4330816 (1982-05-01), Imazeki et al.
patent: 4524412 (1985-06-01), Eng
patent: 4553198 (1985-11-01), Chan et al.
patent: 4847544 (1989-07-01), Goldberg
patent: 4885674 (1989-12-01), Varga et al.
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