Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1986-10-09
1987-12-15
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
323272, 323350, 323351, H02M 310
Patent
active
047137428
ABSTRACT:
A DC-to-DC power converter is constructed by coupling two parallel-connected inductors in series with a DC input power source. A communication switch is connected in series of each of the inductors. One terminal of each of these switches is connected to one terminal of the input power supply, and the other terminal of both of the switches is connected to the common side of the power supply. The commutation switches are controlled so that they have a switching duty cycle that is greater than 50%. Thus, whenever one of the switches turns off or on, the other switch will remain engaged during this switching time. As a result of this construction, the sum of the currents that flow through the inductors provides an output current to the load which has a greatly reduced ripple and a more constant output current. Also, harmonics of lesser amplitude and higher frequency content are drawn from lines, reducing the size of filter components required to reduce these input-current harmonics.
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Bowen Glenn W.
Marhoefer Laurence J.
Sperry Corporation
Sterrett Jeffrey
Wong Peter S.
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