GW Instek ASR-3000 Series - Page 33

GETTING STARTED
33
Inductive Load
When the power supply connects to an inductive
load, e.g., inductor, which generates a back EMF
(Electromotive Force) when output current is
accidentally turned off, a backflow diode is
necessary for absorbing the back EMF, which may
cause irreversible damage to the power supply.
Refer to the following figure where a backflow
diode connects with the inductive load in parallel
to effectively absorb the possible back EMF.
L
N
Inductive Load
Backflow Diode
ASR-3000
CAUTION
Ensure the connected diode meets the following
specifications between the load, either capacitor or
inductor, and the ASR-3000 series power supplies.
 Maximum reverse voltage: 600 V or higher
 Maximum forward current:
 ASR-3200: 20 A or more for 100V range, and 10
A or more for 200V range
 ASR-3300: 30 A or more for 100V range, and 15
A or more for 200V range
 ASR-3400 and ASR-3400HF: 40 A or more for
100V range, and 20 A or more for 200V range