Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1979-05-29
1980-12-16
Shoop, William M.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 96, 363161, 323 435S, H02M 748
Patent
active
042401356
ABSTRACT:
An inverter-cycloconverter power supply providing for the selective augmentation of the battery source (17) output voltage as needed to compensate for reductions in the effective voltage output of the latter source. The output tap points (for example, 48, 50) of the coupling transformer secondary winding (43) of the cycloconverter section (30) are selected to produce a pseudo-sine wave voltage (FIG. 2, 81) composed of alternating square wave voltages of a first and a second, higher level. A regulator section (60) including a second transformer secondary winding (63) controlled by a pair of thyristors (61, 62) adds a rectified voltage to the battery source (17) voltage as required as determined by regulator control circuitry. The latter comprises monitoring circuit means (83, 84, 85, 86, 87, 92, 95) for detecting the output voltage levels of the cycloconverter and for generating control signals (FIG. 2, 86) of a duration corresponding to the effective voltage drop of the battery source (17). These control signals are employed to energize the regulator (60) thyristors (61, 62) only during the times that the cycloconverter (30) transformer taps (48, 50) are selected which produce the alternating lower voltages as timed under microcomputer (70) control.
REFERENCES:
patent: 3196336 (1965-07-01), Schmidt
patent: 3431483 (1969-03-01), Lafuze
patent: 3491282 (1970-01-01), Heinrich et al.
patent: 3514688 (1970-05-01), Martin
patent: 3619765 (1971-11-01), Wood
patent: 3652918 (1972-03-01), Marzolf
patent: 3743919 (1973-07-01), Bingley
patent: 3852654 (1974-12-01), Gyugyi et al.
Bell Telephone Laboratories Incorporated
Kamstra William H.
Shoop William M.
Wong Peter S.
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