PLZ-4WL
19
Methods for Ensuring Stable Operation
1
In
st
al
la
tion and
Pr
ep
ar
at
ion
To make sure that the voltage resulting from inductance remains within the range of the
electronic load’s minimum operating voltage and maximum input voltage, make the wiring as
short as possible and twist the wiring, or reduce the slew rate. If it is not necessary to operate
at a high response speed, reduce the slew rate in CC mode, or reduce the response speed in
CR mode.
Current phase lag
Even during DC operation, it is possible for the phase lag of the current to result in unstable
electronic-load control and oscillation. Make the wiring as short as possible, and twist it.
If you only need to use DC operation, connecting a capacitor and a resistor to the load input
terminals can reduce oscillation. Do not exceed the capacitor’s ripple-current rating.
Optimizing the response speed
You can change the response speed in CV mode and CR mode. The wiring inductance can
cause the current to lag the voltage. This can result in unstable control of the PLZ-4WL and
oscillation.
To ensure stable operation, reduce the response speed.
Current
Voltage across the
load input terminals
Minimum operating
voltage
This change results in unstable
oscillation and hunting.
ΔT
ΔI
Current
Voltage across
the load input
terminals
Example of waveform
Device
under test
PLZ-4
W
L Series
Electronic Load
Keep the wire short
100 cm or less
Twist
–
–
+
+
R
C
Example: R = 10
Ω
, C = 100
µ
F
See
