High-voltage generator based on MOS transistor series discharge

Abstract

The invention discloses a high-voltage generator based on MOS transistor series discharge, belongs to the technical field of electronic and high-voltage measurement, and aims at solving the technicalproblem of how to overcome the defect of voltage reduction of a traditional resistor. The high-voltage generator comprises a MOS transistor series discharge circuit which comprises N voltage-sharing resistors and N MOS transistors connected in series, a capacitor C is connected in parallel between the grid electrode and the source electrode of each MOS transistor, and a voltage-limiting protectionelement MOV is connected in parallel between the source electrode and the drain electrode of each MOS transistor; the first end of the booster is electrically connected with the source electrode of the TN and is connected with the output A, and the second end is electrically connected with the grid electrode of the T1; the first end of the current-limiting resistor R is electrically connected with the drain electrode of the T1, and the second end is connected with the output B; the first end of the voltage stabilizing element W is electrically connected with the grid electrode of the T1; andthe first end of the anti-interference capacitor C1 is electrically connected with the grid electrode of T1, and the second end of the anti-interference capacitor C1 is electrically connected with thesecond end of the voltage stabilizing element W and connected with 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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