| 摘要 |
<p>1,165,803. Converting circuits for voltage changing systems. MOBELEC S.A. HOLDING. 24 Jan., 1967 [14 Sept., 1966], No. 3550/67. Headings H2F and H2H. [Also in Division H3] Apparatus for supplying alternating or direct voltages from either an alternating or direct voltage source comprises a transformer 1, having a tapped primary winding P and multiple secondary windings S, associated with a controlled rectifier bridge 4 and an inverter comprising an oscillator 5, the selection of the mode of operation of the apparatus and the voltage values being effected by way of switches 2, 3. The rectifier bridge 4 comprises a series of diodes D 1 -D 8 and two controlled rectifiers 14, 15, the output of which bridge is smoothed by resistor R 2 and capacitor C 2 . The bridge is supplied from the tapped secondary winding F and the control voltages for the rectifiers 14, 15 are obtained from secondary windings D, E by way of a ganged potentiometer R 5 , R 6 . The oscillating circuit 5 of the inverter comprises transistors T 1 -T 4 and is supplied from a D.C. source 16, the output from the oscillator 5 being fed to the winding F on the transformer 1 and the bases of the transistors are controllably connected to the winding H. Overload protection of the oscillator 5 is provided by a capacitor C 6 which capacitor also effects the starting of the oscillator.</p> |
