The most common induction coil classification and application - sharing with winding machine manufacturers
Dongguan Juke Winding Machine Manufacturer is a professional automated workshop production line solution provider specializing in the production of CNC Winding Machines, fully automatic transformer winding machines and non-standard automation equipment. Since 2004, the company has a professional development and design team. The electronics and mechanical engineers are specialized in the research and manufacture of winding equipment for ten years. They are not only experienced, but also have strong innovation ability. They can be customized according to the special requirements of customers. Improve. Integrity management, and constantly adding value to customers is the company's basic policy; improving customer productivity, reducing customer labor costs, reducing customer product non-performing rate is the company's business objectives; providing affordable high-end automation equipment for the market is the company's development Motive force. Today, Juke winding machine manufacturers Xiaobian for everyone to share the most common induction coil classification and application
First, the definition of the inductor
The inductor coil is wound around the insulating tube by a loop of the wire, and the wires are insulated from each other, and the insulating tube may be hollow or may include a core or a magnetic powder core, which is referred to as an inductor. Expressed by L, the unit has Henry (H), milli-henry (mH), micro-Henry (uH), 1H = 10^3mH = 10^6uH.
Second, the common category of inductance
Classified by inductance: fixed inductance, variable inductance.
Classified according to the nature of the magnetizer: air core coil, ferrite coil, iron core coil, copper core coil.
Classified according to the nature of the work: antenna coil, oscillating coil, choke coil, trap coil, deflection yoke.
Classified by winding structure: single layer coil, multilayer coil, honeycomb coil.
Third, the common parameters of the inductor
1, inductance L
The inductance L represents the inherent characteristics of the coil itself, regardless of the current magnitude. Except for the special inductor (color code inductor), the inductance is generally not marked on the coil, but is marked with a specific name.
2, the anti-XL
The size of the inductive coil that blocks the AC current is called XL, and the unit is ohm. Its relationship with inductance L and AC frequency f is XL=2πfL
3. Quality factor Q
The quality factor Q is a physical quantity indicating the quality of the coil, and Q is the ratio of the inductive reactance XL to its equivalent resistance, ie: Q=XL/R
The higher the Q value of the coil, the smaller the loss of the loop. The Q value of the coil is related to the DC resistance of the wire, the dielectric loss of the skeleton, the loss caused by the shield or the iron core, and the influence of the high frequency skin effect. The Q value of the coil is usually from several tens to several hundreds.
4, distributed capacitance
The capacitance between the turns and turns of the coil, between the coil and the shield, and between the coil and the master is called a distributed capacitance. The presence of the distributed capacitance reduces the Q value of the coil and the stability is deteriorated, so that the distributed capacitance of the coil is as small as possible.
Fourth, the application of the inductor
1, single layer coil
The single-layer coil is wound around the paper tube or bakelite skeleton in a circle with insulated wires. Such as a transistor radio wave antenna coil.
2, honeycomb coil
If the coil is wound, its plane is not parallel to the plane of rotation, but intersects at a certain angle. This coil is called a honeycomb coil. And the number of times the wire is bent back and forth, often referred to as the number of vertices. The advantage of the honeycomb type winding method is that the volume is small, the distributed capacitance is small, and the inductance is large. The honeycomb coils are all wound by an automatic winding machine. The more the folding points, the smaller the distributed capacitance.
3, ferrite core and iron powder core coil
The inductance of the coil is related to the presence or absence of a magnetic core. Inserting a ferrite core into the air core coil increases the inductance and improves the quality of the coil.
4, copper core coil
Copper core coils are used in the ultrashort wave range. The position of the copper core in the coil is used to change the inductance. This adjustment is convenient and durable.
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