LQ-9101
User Manual
Complex Impedance and Equivalent Circuit
2.1 Complex Impedance Parameter Description
The
measured component impedance can be regarded as the complex value of a series model, ie the real
part resistance Rs and imaginary The series of reactance Xs is represented by the vector diagram 6 .
Figure 6
Xs can be either capacitive reactance or inductive reactance, related to frequency f
XC = 1 / 2 f C
л
XL = 2 f L
л
2.2 Equivalent parameter description
For impedance Z, the series equivalent of the series model can be used. Z = Rs + jXs
The expression of can also be expressed by the parallel equivalent parameter Z = Rp || jXp of the
parallel model. The form is different but |Z| and θ are the same, ie the two models are equivalent.
In the equivalent two models, the relationship between the parameters Rs and Rp, Xs and Xp, and the
quality factor Q or loss factor D is shown in Fig. 7. In the figure, F is the frequency.
The conversion relation described in the chart is for reference when the user understands it, and the
bridge directly outputs the corresponding parameter in different display modes without user conversion.
2017/06/01 VER.H VER.K Page 5/22
