| 摘要 |
<p>The circuit is intended to supply a controllable voltage to the terminals (1) and (2) of an inverter bridge (A). This circuit comprises a rectifier (6) whose DC output is applied to two capacitors in series (C1, C2) which define a point (7) of median potential between them. The output current is regulated by two transistors (8, 9) which are made to conduct alternately. The two output terminals of the circuit are connected by two diodes (D3, D4) which are connected in series and whose junction is connected to the point (7) of median potential. Through this arrangement, the power transistors (8 and 9) are not subjected to high voltages and can therefore be made of inexpensive components. Moreover, through alternating control of the transistors (8 and 9) the ripple in the voltage across the terminals of the inverter bridge is reduced by half. <IMAGE></p> |
