Kikusui PLZ150U - Operation of the CV Mode

A-6 Appendix PLZ-U
TableA-3 Action taken when the OCP trips
A.2.3 Operation of the CV Mode
In CV mode, the PLZ-U supplies current so that the voltage at the load input end of
the PLZ-U is constant.
■ CV mode operation
When the PLZ-U is used in CV mode, the PLZ-U operates as a constant voltage
load (shunt regulator) as shown in Fig. A-7. When V1 is greater than V, the input
voltage V is kept constant even when the input current I varies. Current does not
flow when V1 is less than or equal to V.
Fig. A-7 Equivalent circuit of the CV mode and operation
■ Transition of the operating point: Overpower protection (OPP)
We will consider the case when checking the load characteristics of the constant-
voltage power supply of Fig. A-7 using CV mode.
Fig. A-8 Transition of the operating point in CV mode (OPP trip point)
Point F
Load-off function
on
Turns off the load (stops the current supply).
The PLZ-U no longer operates as a load.
Load-off function
off (limit)
CR mode ends. OCP continues, and the PLZ-U
supplies current as a constant current load.
0
I
V
R1
V
Voltage is constant even when
the current changes
V1
PLZ-U Series
Constant voltage
power supply
Input current I
Input voltage V
VM
VM0
VN
VM2
VM1
Input voltage [V]
Input current [A]
Logarithmic scale
Constant power line
(OPP setting)
Constant voltage line
(Constant voltage setting)
Operating area
OPP trip poin
t
M
N
I
N
IOCP
M1
M2