Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1985-06-20
1986-08-26
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
310 11, 322 7, 363 17, 363 24, 363 71, 363134, 363136, 363139, H02M 3315, H02M 3337
Patent
active
046086277
ABSTRACT:
A nondissipative current distribution circuit for a power source, such as magnetohydrodynamic generator, that delivers its output current through a first plurality of positive electrodes and a second plurality of negative electrodes (including plural positive and negative electrode pairs) and provides a predetermined current distribution among the electrodes, is described, and comprises a transformer including first and second windings, the second winding including means for connection to a load, the first winding having plural adjustable taps intermediate its ends, an inductor connected at one end to one end of the first transformer winding and at the other end to a plurality of capacitors connected respectively to each electrode, and a first plurality of silicon controlled rectifiers connected, respectively, between each positive electrode and a tap or the second end of the first transformer winding, and a second plurality of silicon controlled rectifiers connected, respectively, between each negative electrode and a tap or the second end of the first transformer winding, the first plurality of rectifiers configured to conduct alternately with the second plurality of rectifiers. In alternative embodiments, mechanical switches are connected between each electrode and tap or winding end, all switches configured to operate in unison, with an RC filter connected across each switch; or a silicon controlled rectifier switch is connected between each electrode and tap or winding end, all switches configured to operate in unison, with a commutating circuit connected across each rectifier switch.
REFERENCES:
patent: 3368089 (1968-02-01), Klein
patent: 3792340 (1974-02-01), Sheinkman
patent: 4047094 (1977-09-01), Rosa
Beha Jr. William H.
Scearce Bobby D.
Singer Donald J.
The United States of America as represented by the Secretary of
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