An anode terminal is provided for use high voltage applications that also serves as a shield, and which reduces the overall size of the anode terminal and an enclosure containing the anode terminal. The anode terminal includes a toroid and the maximum radius of curvature that is required to provide an optimal field enhancement reduction is reserved for the section of the toroid that is closest to ground, including the walls of the enclosure. The toroid of the anode terminal has variable radii of curvature along its outer surface and is asymmetrical.

A field control device for a high-voltage system includes a shielding element for field control, which can be connected to an electrical conductor of the high-voltage system in an electrically conductive manner and, when connected to the conductor, at least partly delimits a weak-electric-field spatial region. A cooling body, which can be connected to the electrical conductor in a thermally conductive manner and which is disposed within the weak-field spatial region, has an outer surface area which is greater than an outer surface area of the shielding element. A high-voltage system having the field control device is also provided.

A field control device for a high-voltage system includes a shielding element for field control, which can be connected to an electrical conductor of the high-voltage system in an electrically conductive manner and, when connected to the conductor, at least partly delimits a weak-electric-field spatial region. A cooling body, which can be connected to the electrical conductor in a thermally conductive manner and which is disposed within the weak-field spatial region, has an outer surface area which is greater than an outer surface area of the shielding element. A high-voltage system having the field control device is also provided.

A corona comprises a central electrode surrounded by an insulator, which is surrounded by a conductive component. The conductive component includes a shell and an intermediate part both formed of an electrically conductive material. The intermediate part is a layer of metal which brazes the insulator to the shell. An outer surface of the insulator presents a lower ledge, and the layer of metal can be applied to the insulator above the lower ledge prior to or after inserting the insulator into the shell. The conductive inner diameter is less than an insulator outer diameter directly below lower ledge such the insulator thickness increases toward the electrode firing end. The insulator outer diameter is also typically less than the shell inner diameter so that the corona igniter be forward-assembled.

An igniter assembly comprising an ignition coil assembly connected to a firing end assembly by an extension, with a valve assembly disposed in a pressure chamber of the extension, is provided. The valve assembly includes a valve stem biased toward the ignition coil assembly by a spring to seal the pressure chamber. The valve assembly is used to evacuate contents from the pressure chamber by pressing the valve stem toward the spring and allowing contents of the pressure chamber to travel through and past the valve stem and out of the pressure chamber. The valve assembly is also used to fill the pressure chamber with an insulating medium by pressing the valve stem toward the spring and allowing the insulating medium to travel through and past the valve stem and into the pressure chamber after evacuating the contents out of the pressure chamber.

A field control device for a high-voltage system includes a shielding element for field control, which can be connected to an electrical conductor of the high-voltage system in an electrically conductive manner and, when connected to the conductor, at least partly delimits a weak-electric-field spatial region. A cooling body, which can be connected to the electrical conductor in a thermally conductive manner and which is disposed within the weak-field spatial region, has an outer surface area which is greater than an outer surface area of the shielding element. A high-voltage system having the field control device is also provided.

A field control device for a high-voltage system includes a shielding element for field control, which can be connected to an electrical conductor of the high-voltage system in an electrically conductive manner and, when connected to the conductor, at least partly delimits a weak-electric-field spatial region. A cooling body, which can be connected to the electrical conductor in a thermally conductive manner and which is disposed within the weak-field spatial region, has an outer surface area which is greater than an outer surface area of the shielding element. A high-voltage system having the field control device is also provided.

A guided surface waveguide probe structure is described. In one example, the guided surface waveguide probe structure includes a charge terminal elevated to a first height above a lossy conducting medium and a phasing coil elevated to a second height above the lossy conducting medium, wherein the first height is larger than the second height. The structure further includes a non-conductive support structure to support the phasing coil and the charge terminal. The non-conductive support structure includes a truss frame secured to and supported over a substructure, and the truss frame supports the phasing coil at the second height above the lossy conducting medium. The non-conductive support structure also includes a charge terminal truss extension supported by the truss frame, and the charge terminal truss extension supports the charge terminal at the first height above the lossy conducting medium.

A guided surface waveguide probe structure is described. In one example, the guided surface waveguide probe structure includes a charge terminal elevated to a first height and a phasing coil elevated to a second height above a lossy conducting medium. The structure further includes a non-conductive support structure to support the phasing coil and the charge terminal. The non-conductive support structure includes a truss frame that supports the phasing coil at the second height above the lossy conducting medium and supports the charge terminal at the first height above the lossy conducting medium. The structure further includes a substructure bunker constructed in the lossy conducting medium. The substructure bunker can include foundational walls, a grounding grid formed in a foundational seal slab, and a covering support slab at a ground surface elevation of the lossy conducting medium, the covering support slab supporting the non-conductive support structure.

A corona comprises a central electrode surrounded by an insulator, which is surrounded by a conductive component. The conductive component includes a shell and an intermediate part both formed of an electrically conductive material. The intermediate part is a layer of metal which brazes the insulator to the shell. An outer surface of the insulator presents a lower ledge, and the layer of metal can be applied to the insulator above the lower ledge prior to or after inserting the insulator into the shell. The conductive inner diameter is less than an insulator outer diameter directly below the lower ledge such the insulator thickness increases toward the electrode firing end. The insulator outer diameter is also typically less than the shell inner diameter so that the corona igniter can be forward-assembled.