Jinko 2811C, Руководство пользователя

Страница: 11 / 18

11
maybe we can't measure accurately. That is due to the nonlinear of iron core. And it will
cause distortion for the measuring signal current. In order to reduce distortion, we should
decrease the measuring signal level.
4. 9: Selection of series or parallel
Selection of equivalent circuit for capacitor
Small capacitance correspond to high impedance, and parallel resistance affect more
than series resistance. Compare series resistance with impedance of capacitor, series
resistance is much smaller and negligible. So, we should select equivalent parallel to
measure.
In contrast, big capacitance correspond to low impedance, and series resistance
affect more than parallel resistance. Compare to impedance of capacitor, parallel
resistance is much bigger and negligible. So, we should select equivalent series to
measure.
Generally, we can select the equivalent circuit for capacitor according to the rules
below.
＞
10kΩ, select parallel;
＜
10Ω, select series.
Between 10Ω and 10kΩ, please select the suitable equivalent circuit according to
component manufacturer's recommendation.
Selection of equivalent circuit for inductor
Big inductance correspond to high impedance, and parallel resistance affect more
than series resistance. So, equivalent parallel is more suitable for the measurement.
In contrast, small inductance correspond to low impedance, series resistance affect
more than parallel resistance. So, equivalent series is more suitable for the measurement.
Generally, we can select the equivalent circuit for inductor according to the rules below.
＞
10kΩ, select parallel;
＜
10Ω, select series;
Between 10Ω and 10kΩ, please select the suitable equivalent circuit according to
component manufacturer's recommendation.
4.10: Basic accuracy
C
：
0.1% (1+ Cx/Cmax+ Cmin/Cx )(1+Dx )( 1+ks+kv+kf )
；
L
：
0.1% (1+ Lx/Lmax+ Lmin/Lx )(1+1/Qx )( 1+ks+kv+kf )
；
Z
：
0.1% (1+ Zx/Zmax+ Zmin/Zx )(1+ks+kv+kf )
；
R
：
0.1%(1+ Rx/Rmax+ Rmin/Rx )(1+Qx)(1+ks+kv+kf )
；
D
：
±0.0020(1+ Zx/Zmax+ Zmin/Zx )(1+Dx+Dx2 )(1+ks+kv+kf )
；
Q
：
±0.0020(1+ Zx/Zmax+ Zmin/Zx )(Qx+1/Qx )(1+ks+kv+kf )
；
N ote: 1. D and Q are absolute error, others are relative error, Dx=1/Qx;