Impedansi ekivalen urutan positif dan negatif diperoleh dari penjumlahan impedansi sumber urutan positif/negatif, impedansi trafo urutan positif/negatif dan impedansi penyulang urutan positif/negatif. Maka untuk memperoleh impedansi ekivalen urutan positif/negatif, dihitung dengan menggunakan rumus. Subsitusikan ke dalam rumus tegangan jepit sehingga hasil akhir diperoleh hambatan total atau impedansi sebagai berikut: Rangkaian seri RLC memiliki beberapa kemungkinan: Nilai XL.
- Impedansi Rumus Garis
- Impedansi Rumus Modus
- Rumus Impedansi Trafo
- Impedansi Rumus Dan
- Rumus Impedansi Ekivalen Trafo
Impedance of inductor and impedance of capacitor are special cases of the general representation of impedance. Impedance of inductor (also called inductance or inductive reactance) is the measure of the opposition to a change of the electrical current in this component.
It can be summarized, in a very general way, that an inductor lets the low frequencies signals pass (including the 0 Hz signals) and blocks the high frequencies signals.
The formula of the impedance of inductor is: Z = jLw , where:
- Z: is the impedance in ohms
- j: is the operator for imaginary numbers. (imaginary unit)
- L: is the value of the inductor in Henrys (H)
- w: is equal to 2.π.f, where the letter f represents the frequency of the signal applied to the inductor. (frequency unit is Hertz).
The “j” operator is not used with resistors because there is no phase difference between voltage and current. In other words, the voltage and current in a resistor are in phase.
w (angular frequency).
The value w depends directly on f (the frequency) and is measured in radians/sec. (w = 2.π.f)
For example for a frequency of 300 hz, w = 2.π.f = 2 x (3.1416) x 300 = 1884.96 rad / sec.
How to calculate the Inductance of inductor?
To calculate the inductance of an inductor we use the formula Z = wL.
Example 1:
How to obtain the impedance of a 25 mH inductor at 300 Hz.
Z = 2 x π x 300hz x 25mH = 2 x (3.1416) x 300 x 0.025 = 47.124 ohms
Impedansi Rumus Garis
Impedansi Rumus Modus
Example 2:
How to obtain the impedance of a 25 mH inductor at 50 Hz?
Z = 2 x π x 300hz x 25mH = 2 x (3.1416) x 50 x 0.025 = 7.854 ohms.
Rumus Impedansi Trafo
It can be seen from the two previous examples, where the value of the inductor is the same (25 mA), that the impedance is higher for higher frequencies. It can be summarized that the inductor let pass low frequencies signals (there is low impedance) and blocks the high frequencies signals (there is high impedance).
Example 3:
How to obtain the impedance of a 12 mH inductor at 60 Hz? Contra evolution free.
Z = 2 x π x 60hz x 12mH = 2 x 3.1416 x 60 x 0.012 = 4.524 ohms.
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