Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1978-10-31
1981-01-13
Shoop, William M.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 21, 363 26, 363 47, H02M 114
Patent
active
042452880
ABSTRACT:
Current spikes in a buck power converter due to commutating diode turn-off time is eliminated by using a tapped inductor in the converter with the tap connected to the switching transistor, without the commutating diode in the usual place, and instead connected to conduct current from one end of the tapped inductor remote from the load during the interval in which the transistor is not conducting. In the case of a converter having a center-tapped (primary and secondary) transformer between two switching power transistors operated in a push-pull mode and two rectifying diodes in the secondary circuit, current spikes due to transformer saturation are also eliminated by using a tapped inductor in the converter with the tap connected to the rectifying diodes and a diode connected to conduct current from one end of the tapped inductor remote from the load during the interval in which the transistors are not conducting.
REFERENCES:
patent: 3076131 (1963-01-01), Weil
patent: 3740639 (1973-06-01), Easter
patent: 3745443 (1973-07-01), Weil
patent: 3870943 (1975-03-01), Weischedel et al.
patent: 4034280 (1977-07-01), Cronin et al.
Frosch Robert A. Administrator of the National Aeronautics and Space
McLyman William T.
Manning John R.
McCaul Paul F.
Mott Monte F.
Shoop William M.
Wong Peter S.
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