| 摘要 |
<p>PURPOSE:To make it possible to exclude unbalance in reverse voltage accompanied by neither a complicated constitution nor the increase in loss by a constitution wherein the role of a balance resistor is shared by voltage dividing resistors. CONSTITUTION:In a high voltage rectifier circuit, unit rectifiers 1A-1C which are wired in a bridge form are wired in cascade pattern by a plurality of stages. A step-up transformer 2 has secondary windings 2A-2C which are connected to the rectifiers 1A-1C, respectively. A resistive potential divider 14 comprises several stages of unit resistive potential dividers 14A-14C which have phase compensating capacitors C1-C3 that are connected to the rectifiers 1A-1C in parallel and have the equal resistance value. A voltage detecting resistor 14d having a voltage dividing resistor Rd and a capacitor Cd is connected to a voltage dividing resistor R1 and a capacitor C1 of the potential divider 14A. The detected voltage is converted into the output voltage in an output voltage detector 6 and the result is outputted. Thus, the resistive potential dividers 14A-14C serve the function of a balance resistor, and the constitution of the detector is simplified. The unbalanced distribution of reverse voltages is excluded, and the rectifier element can be protected.</p> |
