Symbolic Layout of Inductance Coils and Chokes

Symbolic Layout of Inductance Coils and ChokesLet us consider the features of graphic symbols for inductance coils and chokes, which may be necessary to work with schematic electrical circuits.In electric circuit diagrams inductance coils and chokes without taps are represented by a series of coils with lead-outs. Next to it, there is a conventional letter, the letter L, then there is the serial number of the inductance in the circuit, and finally, after a little space, there is the number indicating the nominal inductance value, and units of measure.If the coil has taps, they are represented by lines drawn to the points of contact of semicircles or to their midpoints.A ferromagnetic core of an inductance coil or a choke is represented on the diagram with a straight line.If the core is made of nonmagnetic materials, then next to the segment of the straight line the chemical symbol of the element is indicated, for example, CU - copper.The cores of magnetodielectric materials are represented with a dotted line.In order to increase the magnetic resistance of a ferromagnetic magnetic circuit, there is a gap provided, which can be filled in with a special insulating lacquer, thick paper or cardboard. Then, the solid line in the graphical representation should be broken in the middle.To adjust the inductance the position of the magnetic circuit is to be changed. It is represented by a trimming symbol, i.e. a straight line with a "cap" that crosses the magnetic coil and magnetic circuit symbols at an angle of 45 degrees.Variometers or variable inductance coils, designed to adjust the oscillating circuit, are represented by an arrow crossing the coil symbol.All the considered symbols of inductance coils and chokes meet the requirements of GOST 2.723 and are used to build the schematic circuits.

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Science & Technology

Tags:

• choke
• circuitry
• coil
• designation
• inductance