Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1992-05-01
1993-12-21
Beha, Jr., William H.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 56, 363 80, H02M 112
Patent
active
052726150
ABSTRACT:
A digital controlled inverter (100) for inverting an input signal to an alternating current signal having a clock generator (104) for generating a high frequency clock timing signal and a latch (106) for controlling the passage of the clock timing signal to a power stage (102). The power stage (102), which provides a low distortion alternating current signal, is controlled by the latch (106). A control loop (108) is provided for sensing and converting the alternating current signal to a command signal. The command signal controls the state of the latch (106). The latch (106) is reset at the rate of the clock timing signal and updated with the command signal to provide pulse-to-pulse regulation of the alternating current signal. The inverter (100) comprises a transient response to variations in load proportional to the clock timing signal. In a preferred embodiment, the latch (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 (106). The alternating current signal is rectified and converted to a digital word and then compared to a reference digital word in a digital comparator (138) to provide the command signal to the latch (106).
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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