Kikusui PMC 18-5A - Managing Regenerative Loads; Connecting Loads with Stored Energy

32 PMC-A
3.1.2 When the Load Generates a Reverse Current
to the Power Supply
The PMC-A cannot absorb reverse current from the load.
Therefore, if a regenerative load (such as an inverter, converter,
or transformer) is connected, the output voltage increases and
becomes unstable.
For these types of loads, connect a resistor RD as shown in Fig.
3-3 "Remedy for regenerative load" to bypass the reverse cur-
rent. However, the amount of current to the load decreases by
Irp.
Fig. 3-3 Remedy for regenerative load
• For resistor RD, select an appropriate resistor rated
for the power (allowing sufficient margin).
• If a resistor with insufficient rated power for the cir-
cuit is used, RD may burn out.
3.1.3 When the Load Has Accumulated Energy
Such As Batteries
When connecting to a load that has stored energy such as a bat-
tery, a large current flows from the load to the product's internal
capacitor through a protection diode in an internal output con
-
I O
R D
E O
Equivalent circuit
Regenerative load
Load
−
+
0
Reverse current
Output current waveforms
-I O
+I O
I rp
R D [Ω] ≤
E
O
[V]
I
rp
[A]
R D : “Dummy road” that bypasses
reverse current
E
O : Output voltages
I
rp : Maximum value of reverse current
CAUTION