High Voltage Generator Based on MOS Tube Series Discharge

Abstract

The invention discloses a high-voltage generator based on the series discharge of MOS tubes, which belongs to the technical field of electronics and high-voltage measurement, and the technical problem to be solved is how to overcome the disadvantages of traditional resistance step-down. Including: MOS tube series discharge circuit, which includes N voltage equalizing resistors and N series MOS tubes, a capacitor C is connected in parallel between the gate and source of each MOS tube, and the source and drain of each MOS tube The voltage limiting protection element MOV is connected in parallel between; the first end of the booster is electrically connected to the source of TN and connected to the output A, and the second end is electrically connected to the gate of T1; the first end of the current limiting resistor R is connected to the T1 The drain is electrically connected, and the second end is connected to the output B; the first end of the voltage stabilizing element W is electrically connected to the gate of T1; the first end of the anti-interference capacitor C1 is electrically connected to the gate of T1, and the second end is connected to the voltage regulator A second end of element W is electrically connected and connected to output B.

Description

technical field [0001] The invention relates to the technical field of electronics and high-voltage measurement, in particular to a high-voltage generator based on MOS tube series discharge. Background technique [0002] High-voltage measurement requires various DC or AC high-voltage generators, and many measured objects have large capacitance, such as high-voltage cables or capacitors. When using DC measurement, it is necessary to manually discharge the measured object after the measurement is completed. However, when performing ultra-low frequency AC high voltage measurement, there is always a charging and discharging process of the measured capacitor. The current electronic switch boost technology is mature, but the biggest problem encountered is that the booster can only boost the voltage, not step down. Therefore, the current DC high voltage generator does not consider the problem of capacitive load step-down, but the resistance method is generally used to realize the...

AI Technical Summary

Problems solved by technology

[0003] Resistor step-down brings two serious problems: one is that in the boost stage, the resistor becomes the load of the booster, which not only increases extra heat, but also reduces the output capability of the booster; the other is in the step-down stage, the load The capacitor can only be discharged through the resistor to lower the voltage. The lower the voltage, the slower the discharge, resulting in waveform distortion.

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