| 摘要 |
1,267,242. D.C. to D.C. converter. DORNIER SYSTEM G.m.b.H. 31 March, 1969 [22 Oct., 1968], No. 16723/69. Heading H2F. A D.C. to D.C. converter comprises a series arrangement of an inductor D and rectifier G connected between an input source U andan output V, the output being successively shunted by a switching device, such as transistor T, connected at the junction of inductor D and rectifier G. The conductive state of switching transistor T is controlled in part by a winding D1 regeneratively coupled to inductor D and also by a further winding D2 inductively coupled to inductor D. As described, when transistor T is conductive, a current builds up in inductor D until transistor T is turned off, when the current is switched via rectifier G to the load connected at terminal V. The average voltage across the load is thus the function of the mark/space ratio of the current in T which may be varied by controlling the timing of conductive periods of thyristors H1 (which turns off T) and H2 (which turns on T). Thyristors H1, H2 may be replaced by a triac or quadrac. Alternatively, if the fluctuations of current in inductor D are twice the average value, only the turn-off thyristor H1 (or a transistor) is necessary. |
