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How to calculate the impedance and reaction impedance in a circuit

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Impedance and reaction impedance concepts

(1) Impedance is defined as the degree to which an AC circuit obstructs current, similar to the resistance of a direct current circuit, but taking into account frequency factors.
(2) The impedance is described by a complex representation, with the real part representing the resistance and the imaginary part representing the reaction impedance.
(3) The reaction impedance is divided into capacitive and inductive, and is related to capacitance and inductance and frequency.
(4) As frequency increases, capacitive reaction impedance decreases; The inductance reaction impedance increases.

Impedance calculation method

(1) Determine the component type (R,L,C) and parameter values.
(2)R is numerically based, where L is ωL and C is 1/(ωC).
(3) For example RL circuits, calculate the sum of R and ωL as the total impedance.

Calculation of total impedance in different combinations

(1) The total impedance is obtained by direct addition in series and reciprocal addition in parallel.
(2) The calculation process of RLC series and parallel circuits is given.

Reaction impedance calculation

(1)C is 1/(ωC), considering the C value and frequency ω.
(2)L is ωL, considering the value of L and frequency ω.

Application of impedance in circuit

(1) Filter :(C,L) combination frequency selector.
(2) Matching transmission :(R) Maximum power transmission.
(3) Measurement: The impedance is used to measure the parameters of the amorphous object.

Conclusion

It is very important to master the method of calculating circuit impedance and reaction impedance for understanding and analyzing circuit. The correct calculation of impedance and reaction impedance allows us to better design and optimize circuits to meet specific needs and application scenarios.
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