Electric potential control of high voltage insulation

摘要

A high voltage device includes a circuit board 12 surrounded by an enclosure 11, potting 13 to provide electrical insulation between the circuit board 12 and the enclosure 11, and a layer of material 14, having a different resistivity than a resistivity of the potting 13, dividing the potting into separate and discrete sections. The layer of material 14 can be multiple layers. Each layer 14 can have a voltage applied, and a voltage of any layer 14 closer to the circuit board 12 can have a higher absolute value than any layer 14 farther from the circuit board 12.

主权项

1. A power source device for an x-ray tube, comprising:
a. a circuit board substantially surrounded by an enclosure; b. a high voltage component on the circuit board configured to have a higher voltage differential between this component and the enclosure than other components on the circuit board; c. a circuit on the circuit board configured to create a voltage differential between the high voltage component and the enclosure of at least 9 kilovolts; d. an electrically insulative potting material disposed between the circuit board and the enclosure; e. a layer of electrically conductive material disposed within the potting material and disposed at least partially between the circuit board and the enclosure; f. the layer of electrically conductive material dividing at least a portion of the potting into separate and discrete sections, the separate and discrete sections of potting having a higher dielectric strength than if the sections of potting were not divided by the layer of electrically conductive material; g. the separate and discrete sections of potting providing electrical insulation between the high voltage component and the enclosure; and h. the layer of electrically conductive material is configured to have a voltage applied that is between a voltage of the high voltage component and a voltage of the enclosure.