Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1979-04-09
1981-03-31
Pellinen, A. D.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
336155, 336172, 363123, H01F 3100, H02M 108
Patent
active
042597161
ABSTRACT:
A novel transformer is described for use in a static inverter in association with one or two switching semiconductor devices. The transformer produces an output for control of the associated switching device(s) which changes in sense from conduction aiding to conduction inhibiting as a function of the flux level in the transformer core. The invention is applicable to single loop cores, such as are assembled from two "U" cores. Control is effected by a primary and secondary control winding wound through an aperture pair, the aperture pair being oriented for "neutrality" of the second control winding to the main flux. The aperture pair creates a five branch magnetic path which permits optimizing the control voltage applied to the associated semiconductor devices both to enhance the switching efficiency when the switching device is initially turned on and to reduce stresses on the switching device by precluding transformer saturation when the switching device is turned off. With two switching devices, two aperture pairs are normally provided.
REFERENCES:
patent: 2284406 (1942-05-01), D'Entremont
patent: 2953739 (1960-09-01), Duinker
patent: 3629741 (1971-12-01), Brune
patent: 4002999 (1977-01-01), Hesler
patent: 4004251 (1977-01-01), Hesler et al.
patent: 4020440 (1977-04-01), Moerman
patent: 4202031 (1980-05-01), Hesler et al.
Baldwin, "A Magnetic Device for High Speed Sensing of Small Currents," AIEE Transactions, Part I, vol. 80, 1961, pp. 1-3.
Harris James E.
McFadyen Robert J.
Peil William
Schmitz Nicholas A.
Baker Carl W.
General Electric Company
Lang Richard V.
Pellinen A. D.
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