Panjiang Mining Machinery scrap
Publish: 2021-05-27 08:00:45
1. Inctor coil is made up of wires which are wound on the insulating tube one by one. The wires are insulated from each other. The insulating tube can be hollow or contain iron core or magnetic powder core, which is called inctor for short. Expressed by L, the units are Henry (H), millihenry (MH), microhenry (Uh), 1H = 10 ^ 3mh = 10 ^ 6uh< First, inctors are classified into fixed inctors and variable inctors
according to the properties of magnets: hollow core coil, ferrite coil, iron core coil and copper core coil. According to the nature of work: antenna coil, oscillation coil, choke coil, notch coil, deflection coil. According to the winding structure classification: single layer coil, multi-layer coil, honeycomb coil< Second, the main characteristic parameters of the inctance coil
1. In addition to the special inctance coil (color code inctance), the inctance is generally not specially marked on the coil, but with a specific name
2. Inctive reactance XL
the blocking effect of inctance coil on AC current is called inctive reactance XL, and the unit is Ohm. Its relation with inctance L and AC frequency f is XL = 2 π f
3. Quality factor Q
quality factor Q is a physical quantity that represents the coil quality. Q is the ratio of inctive reactance XL and its equivalent resistance, that is, q = XL / R. The higher the coil value is, the smaller the circuit loss is. The coil value is related to the DC resistance of the conctor, the dielectric loss of the framework, the loss caused by the shield or iron core, and the influence of high frequency skin effect. Coil values are usually tens to hundreds
4. Distributed capacitance
the capacitance between turns of coil, between coil and shield, between coil and bottom plate is called distributed capacitance. The existence of distributed capacitance makes the value of the coil decrease and the stability of the coil become worse, so the smaller the distributed capacitance of the coil, the better.
according to the properties of magnets: hollow core coil, ferrite coil, iron core coil and copper core coil. According to the nature of work: antenna coil, oscillation coil, choke coil, notch coil, deflection coil. According to the winding structure classification: single layer coil, multi-layer coil, honeycomb coil< Second, the main characteristic parameters of the inctance coil
1. In addition to the special inctance coil (color code inctance), the inctance is generally not specially marked on the coil, but with a specific name
2. Inctive reactance XL
the blocking effect of inctance coil on AC current is called inctive reactance XL, and the unit is Ohm. Its relation with inctance L and AC frequency f is XL = 2 π f
3. Quality factor Q
quality factor Q is a physical quantity that represents the coil quality. Q is the ratio of inctive reactance XL and its equivalent resistance, that is, q = XL / R. The higher the coil value is, the smaller the circuit loss is. The coil value is related to the DC resistance of the conctor, the dielectric loss of the framework, the loss caused by the shield or iron core, and the influence of high frequency skin effect. Coil values are usually tens to hundreds
4. Distributed capacitance
the capacitance between turns of coil, between coil and shield, between coil and bottom plate is called distributed capacitance. The existence of distributed capacitance makes the value of the coil decrease and the stability of the coil become worse, so the smaller the distributed capacitance of the coil, the better.
Hot content