| 摘要 |
PURPOSE:To obtain a high-voltage power source controller capable of decreasing the size of a device and improving the operation efficiency of a PWM controller by installing an output controller to control duty ratios to switch over switching means. CONSTITUTION:Changes of high voltages generated in high-voltage transformers are monitored with a monitor voltage detection circuit and the monitor voltages are selected one by one with specified timing with a multiplexer 44, supplied to an analogue-to-digital converter 45, converted into digital values, and supplied to a calculator 51. The calculator 51 compares the entered digital values with a preset reference value by calculation, adds the result to feed-back values from latch circuits 60-62, and transmits it. The output values corresponding to the monitor voltages thus transmitted from the calculator 51 are latched individually by the latch circuits 60-62 and the duty ratios of switching means are controlled by the preset reference frequency and the count value of a reference counter. |
