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.

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.

An insulator includes an end fitting and a connecting device disposed on the end fitting for connecting the insulator to a suspension device. The insulator also includes an additional operating device. The end fitting and the connecting device are formed in one piece. An arrangement is also provided for dissipating overvoltage using the insulator according to the invention.

A lightning protection device for an aircraft, includes an anti-corona element taking a rounded shape and having an electrically conductive surface, intended for enveloping an area of the airframe of the aircraft that is liable to receive a lightning strike, one or more electric charge dissipators attached to said anti-corona element.

A lightning protection device for an aircraft, includes an anti-corona element taking a rounded shape and having an electrically conductive surface, intended for enveloping an area of the airframe of the aircraft that is liable to receive a lightning strike, one or more electric charge dissipators attached to said anti-corona element.

An air-purifier system is provided that generates an ionic wind that is comfortable for the persons in a space to obtain a comfortable environment. The air-purifier system includes an air purifier having a first electrode that has first electrode-structures where each has a first conductive area that is substantially shaped as a circular ring between a first hollow and second hollow, a second electrode that has second electrode-structures where each has a third hollow that is larger in diameter than the first hollow and is substantially shaped as a circle between a third hollow and a fourth hollow a holder to fix the electrodes with a gap therebetween, and a third electrode that has third electrode-structures where each extends along the central axis of the first and the second electrode-structure; a sensor that measures environmental data in a space where the air purifier is provided; and a controller that controls the operations of the air purifier based on the environmental data that are measured by the sensor.

An air-purifier system is provided that generates an ionic wind that is comfortable for the persons in a space to obtain a comfortable environment. The air-purifier system includes an air purifier having a first electrode that has first electrode-structures where each has a first conductive area that is substantially shaped as a circular ring between a first hollow and second hollow, a second electrode that has second electrode-structures where each has a third hollow that is larger in diameter than the first hollow and is substantially shaped as a circle between a third hollow and a fourth hollow a holder to fix the electrodes with a gap therebetween, and a third electrode that has third electrode-structures where each extends along the central axis of the first and the second electrode-structure; a sensor that measures environmental data in a space where the air purifier is provided; and a controller that controls the operations of the air purifier based on the environmental data that are measured by the sensor.

Provided is an ion generating device for organic matter decomposition for generating ions to decompose organic matter stored in a tank. The ion generating device includes a needle electrode and a plate electrode, both facing each other, and a direct-current power supply unit configured to apply a direct-current voltage with positive polarity to the needle electrode. The direct-current power supply unit includes a voltage controller configured to set the direct-current voltage to a specified voltage value to produce positive corona discharge between the needle electrode and the plate electrode under atmospheric pressure.

A trailer-based system and related method are described for efficiently transporting, configuring and deploying a power flow control system, including connection to a power transmission line. The system may include preconfigured modules using bolted attachments, hoist rings and a corona ring structure. Standardized clamps are also used. A plurality of power flow control modules is operable while mounted on the trailer. The power flow control modules are configurable to inject reactive power into the power transmission line.

A trailer-based system and related method are described for efficiently transporting, configuring and deploying a power flow control system, including connection to a power transmission line. The system may include preconfigured modules using bolted attachments, hoist rings and a corona ring structure. Standardized clamps are also used. A plurality of power flow control modules is operable while mounted on the trailer. The power flow control modules are configurable to inject reactive power into the power transmission line.