The Working Principle Of The Air-core Coil

The working principle of the air-core coil

Inductance is the use of the principle of electromagnetic induction. The hollow adhesive when a current flows through a wire coil as self-adhesive coil, will produce certain electromagnetic field around that wire adhesive coil, and the electromagnetic field of the wire itself will be in within the scope of the electromagnetic field in the conductor induction. Hollow hollow coil to generate electromagnetic fields as self-adhesive coil wire itself, is called 'feeling', i.e., the change of wire itself air-core coil current changes magnetic field, the magnetic field and further influenced the current in the conductor; For at the voice coil electromagnetic field range of other wires produce effect, called 'mutual inductance.

Inductor electrical characteristics and condenser on the contrary, 'resistance high frequency), low frequency, that is to say, will be confronted with a lot of high frequency signal through the inductance coil resistance, it is difficult to pass; And presented at the time of the low frequency signal through its resistance is small, the low frequency signal can be more easily through it. Inductance coil of dc resistance is almost zero. Voice coil resistance, capacitance and inductance for electrical signals in the circuit flow voice coil actuator can present certain resistance, the resistance we call 'impedance inductance coil of current signal is the impedance of the present use of coil self-induction. Inductance coil sometimes we put it referred to as' inductance' or 'coil, represented by the letter' L '. Winding inductance coil, the coil winding circle number we usually call it the 'number of turns of wire coil.