Introduction of a ring capacitor voltage divider for linearity calibration of impulse voltage divider

Author： GOZ Electric Time：2024-06-11 09:24:12 Read：20

    The present invention provides a ring-shaped capacitive voltage divider for linearity calibration of an impulse voltage divider. The capacitive voltage divider includes: a conductive shell and a guide rod, a low-voltage arm and a data acquisition device; the guide rod is inserted into the shell, and the guide rod and the insertion portion of the shell are insulated, the first end of the guide rod is used to connect with the impulse voltage generator, and the second end of the guide rod is used to connect with the voltage divider; the low voltage () is placed in the shell, the low-voltage arm includes a capacitor, the first end of the capacitor is electrically connected to the shell, and the second end of the capacitor is electrically connected to the guide rod; the first input end of the data acquisition device is electrically connected to the first end of the capacitor, and the second input end of the data acquisition device is electrically connected to the second end of the capacitor, for collecting the voltage of the capacitor. The internal structure of the capacitive voltage divider of the present invention is a pure capacitive structure, there is no inductance, the guide rod replaces the high-voltage lead, and the anti-interference ability is strong, so that the linearity measurement of the impulse voltage divider is more accurate.

1. A ring-shaped capacitive voltage divider for linearity calibration of impulse voltage divider, used for measuring the linearity of impulse voltage divider, characterized in that it comprises: a conductive shell and a guide rod, a low-voltage arm and a data acquisition device; wherein the guide rod is inserted into the shell, and the guide rod and the insertion part of the shell are insulated, the first end of the guide rod is used to connect with the impulse voltage generator, and the second end of the guide rod is used to connect with the voltage divider; the low-voltage arm is placed in the shell, and the low-voltage arm includes a capacitor body, the capacitor body is formed by connecting a plurality of capacitors equally distributed along the circumference in parallel, the first end of the capacitor body is electrically connected to the shell, and the second end of the capacitor body is electrically connected to the guide rod; the first input end of the data acquisition device is electrically connected to the first end of the capacitor body, and the second input end of the data acquisition device is electrically connected to the second end of the capacitor body, for collecting the voltage at both ends of the capacitor body.

2. The annular capacitive voltage divider for linearity calibration of the impact voltage divider is characterized in that its low-voltage arm also includes: a matching resistor; wherein the first end of the matching resistor is electrically connected to the second input end of its data acquisition device, and the second end of the matching resistor is electrically connected to the second end of each capacitor.

3. The annular capacitive voltage divider for linearity calibration of the impact voltage divider is characterized in that its low-voltage arm also includes: a first circuit board and a second circuit board; wherein the first circuit board is electrically connected to its housing, and the second circuit board is electrically connected to its guide rod; and the first end of each capacitor is connected through its first circuit board, the second end of each capacitor is connected through its second circuit board, and the second end of the matching resistor is electrically connected to its second circuit board; the first input end of its data acquisition device is electrically connected to its first circuit board.

4. The annular capacitive voltage divider for linearity calibration of the impulse voltage divider is characterized in that the first circuit board and the second circuit board are arranged in parallel, the matching resistor and the capacitor are placed between the first circuit board and the second circuit board; the first circuit board is provided with a first through hole, an insulating ring is arranged in the first through hole, and the connection line between the first end of the matching resistor and the second input end of the data acquisition device is passed through the insulating ring; the second circuit board is provided with a conductive connecting rod, and the connecting rod is electrically connected to the guide rod.

5. The annular capacitive voltage divider for linearity calibration of the impact voltage divider is characterized in that its low-voltage arm also includes: a shielding shell); wherein the capacitor, the matching resistor, the first circuit board and the second circuit board are all placed in the shielding shell; the shielding shell is a conductive shell with an opening at one end, the opening end cover of the shielding shell is provided with a first insulating cover, the first insulating cover is provided with a second through hole, and the connecting rod is passed through the second through hole; the shielding shell is electrically connected to its shell, and the first circuit board is electrically connected to its shielding shell; the shielding shell is provided with a third through hole, and the connecting line between the matching resistor and its data acquisition device, and the connecting line between the first circuit board and its data acquisition device are all passed through the third through hole.

6. The annular capacitive voltage divider for linearity calibration of the impact voltage divider is characterized in that it also includes: an attenuator placed in its shell; wherein the first circuit board is electrically connected to the first input end of the attenuator, the first end of the matching resistor is electrically connected to the second input end of the attenuator, the first output end of the attenuator is electrically connected to the first input end of the data acquisition device, and the second output end of the attenuator is electrically connected to the second input end of the data acquisition device.

7. The annular capacitive voltage divider for linearity calibration of the impact voltage divider is characterized in that its data acquisition device is placed in its shell.

8. The annular capacitive voltage divider for linearity calibration of the impact voltage divider is characterized in that its shell is an annular body with openings at both ends, and both ends of the shell opening are covered with second insulating covers, and the two second insulating covers are coaxially provided with fourth through holes, and the guide rod is passed through the fourth through hole, and both ends of the guide rod extend out of the shell for a distance.

9. The annular capacitive voltage divider for linearity calibration of the impact voltage divider is characterized in that it also includes: a damping resistor; wherein the first end of the guide rod is provided with a mounting hole, the damping resistor is mounted in the mounting hole, and the damping resistor is placed outside the shell.