The energy removed by the air stream cooling coil (210) is reintroduced to the air stream by the air stream heating coil (212).

The excess of synthetic resin mixture is collected and re-used, and the air-core coil (3) is then cured at a higher temperature.

The spool includes a spool shaft with an exhaust turbine wheel mounted at one end and an air compressor wheel coaxially mounted for common rotation at the opposite end of the spool shaft.

A layer of air is formed between the power transmission coil (112) and the cover (114).

The path of airflow, includes a first portion (60) in a first direction defining a cross flow distributed over a portion of the coil assembly in the first airflow plenum.

A second portion (64) defines a flow extending from the first airflow plenum in a second direction through the coil assembly.

An airflow restrictor (34) is provided to accelerate the flow of air along the tube to the heater coil.

Two axial air gaps are located between the bobbin assembly and the counterweight assembly and two radial air gaps are located between the bobbin assembly and the counterweight assembly.

The ratio (R/W) of the radius (R), from the axis-center (O) of the air-core coil (1) to the outer circumference of the air-core coil (1), to the width (W) of the air-core coil (1) (conductive member), is 2 ≤ R/W ≤ 4.

The coil includes a first coil section and a second coil section.

A common mode choke coil is provided with a primary coil (L1) and a secondary coil (L2).

In at least some embodiments, an air handler includes a coil and a fan.

The dual inductor circuit comprises an inductor-within-inductor design in which a small inductor is disposed within a large inductor.

The transfer unit further comprises a primary coil (N0), a first secondary coil (N1) and a second secondary coil.

The local coil includes an RF coil (50) with a plurality of coil elements (501, 50n ).