A power transmission transformer (1) includes a transformer body (11). Each of two upper pipings (3) is connected between the transformer body (11) and one of two heat dissipators (2, 21) outside of the transformer body (11). Each of two lower pipings (4) is connected between the transformer body (11) and one of the heat dissipators (2, 21). A sound absorbing device (6, 61) is mounted between and spaced from one of two sidewalls of the transformer body (11) and one of the heat dissipators (2, 21). The sound absorbing device (6, 61) is fixed to one of the upper pipings (3) and one of the lower pipings (4). An outer wallboard (63) and a sound absorbing material (64) are respectively mounted to two sides of at least one fixing frame (62) of the sound absorbing device (6, 61).

A magnetic structure includes at least one bobbin and a core. Each of the bobbin has at least one winding portion in which a through passage is provided along its longitudinal direction, the core has at least one column, the column is received in the through passage so that a heat dissipation space is formed between an outer wall of the column and an inner wall of the through passage. In the magnetic structure according to the present disclosure, during the operation of the magnetic structure, the heat generated from the column and from an inner layer of a coil wound on the winding portion both can be quickly dissipated through the heat dissipation space, and thus the heat dissipation efficiency of the magnetic structure according to the present disclosure is improved.

A magnetic structure includes at least one bobbin and a core. Each of the bobbin has at least one winding portion in which a through passage is provided along its longitudinal direction, the core has at least one column, the column is received in the through passage so that a heat dissipation space is formed between an outer wall of the column and an inner wall of the through passage. In the magnetic structure according to the present disclosure, during the operation of the magnetic structure, the heat generated from the column and from an inner layer of a coil wound on the winding portion both can be quickly dissipated through the heat dissipation space, and thus the heat dissipation efficiency of the magnetic structure according to the present disclosure is improved.

This disclosure provides an ignition coil for a spark ignited internal combustion engine. The ignition coil includes a coil body having an outer surface and internal windings coupled to a connector. The ignition coil also includes a housing surrounding the coil body. The housing has an outer wall spaced apart from the outer surface of the coil body thereby forming a gap between the outer surface of the coil body and the outer wall. The outer wall includes an opening in flow communication with the gap.

This disclosure provides an ignition coil for a spark ignited internal combustion engine. The ignition coil includes a coil body having an outer surface and internal windings coupled to a connector. The ignition coil also includes a housing surrounding the coil body. The housing has an outer wall spaced apart from the outer surface of the coil body thereby forming a gap between the outer surface of the coil body and the outer wall. The outer wall includes an opening in flow communication with the gap.

An air cooling system, method, apparatus and kit applied to lower transformer operating temperatures, such as governed by a tank or container of oil, allowing transformer components to run more efficiently at a lower temperature level, e.g., down from the hot level operating temperatures typical in stressed conventional devices. By lowering the operational levels to within or below the nominal operational temperature ranges for the equipment, and recovering heat generated during operation, several advantages are obtained.

The present disclosure provides a coil device for generating plasma in semiconductor process equipment and the semiconductor process equipment. The device includes a coil structure and a fixed cooling assembly for fixing and cooling the coil structure. The fixed cooling assembly includes a fixed body made of insulation material. A cooling space is formed in the fixed body. The coil structure is fixedly arranged in the cooling space. An inlet opening and an outlet opening communicating with the cooling space are arranged at the fixed body. The inlet opening is configured to transfer the cooling gas into the cooling space. The outlet opening is configured to exhaust the cooling gas out of the cooling space. A turbulence structure is further arranged in the cooling space and is configured to change a gas flow direction in the cooling space to improve uniformity of the gas distribution in the cooling space.

A take-up device for the taking-up of insulating fluid from a tank of a transformer or a reactance coil. The take-up device has a compensator, which is configured as a hollow body with a variable compensator volume, and is connectable to a tank opening of the tank, such that insulating fluid can flow through the tank opening between the interior of the tank and the compensator volume.

A take-up device for the taking-up of insulating fluid from a tank of a transformer or a reactance coil. The take-up device has a compensator, which is configured as a hollow body with a variable compensator volume, and is connectable to a tank opening of the tank, such that insulating fluid can flow through the tank opening between the interior of the tank and the compensator volume.

An enhanced N.sub.2 regulation system is integrated with a H.sub.2 sensor together as a combined package. This system is designed to detect the generation of hydrogen within a transformer, directly within the nitrogen headspace of the transformer. The present invention also ensures a system's operation that maintains the set pressure range by either adding nitrogen or venting overpressure to the atmosphere as required. The final stage of the N.sub.2 regulator system is responsible for maintaining the gas-blanketed tank pressure within the range of 0.5 to 5.0 psi consistently.