How to calculate transformer impedance

Written by launie sorrels
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How to calculate transformer impedance
Impedence and complex impedence are slightly different. (power line image by Einar Bog from Fotolia.com)

Ohm's Law defines the relationships between power, voltage, current and resistance. When you know the value of these it is easy to calculate the value for impedance. Impedance and complex impedance are slightly different, in which complex impedance will general include capacitance inductance as well. Transformers may have several coils and other electronic devices that may cause variations in the electrical output. Formulas for reaching the complex impedance of a circuit can be pages long.

Skill level:
Moderate

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Instructions

  1. 1

    Get the value of the volts within the circuit. We will assume the value of the volts is 100.

  2. 2

    Get the value of the amperes in the circuit. We will assume the value of the ampere is .1.

  3. 3

    Use Ohms law to find the impedance. The formula is Z = E/I. Z = 100/.1 or Z = 1000 ohms

Tips and warnings

  • Remember if you are using a coil then there may be a ratio coefficient change to the ampere value. If there is a 10:1 difference then the 100 volts would instead be 10 volts.

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