AMETEK SGA Series - Manual (Page 34)

Installation Sorensen SGA Series
2-14 M550129-01 Rev AG
2.6 LOAD CONSIDERATIONS
This section provides guidelines for incorporating protective diode networks
at the output of the power supply to prevent damage while driving inductive
loads or loads having stored energy that could be circulated back to the
power supply.
2.6.1 INDUCTIVE AND STORED-ENERGY LOADS
To prevent damage to the power supply from inductive voltage kickback,
connect an anti-parallel
diode (rated at greater than the supply’s output
voltage and current) across the output: Connect the cathode to the positive
output and the anode to return.
Where positive load transients, such as back EMF from a motor might occur,
or stored energy is present such as a battery, a second blocking diode in
series with the output is recommended to protect the power supply.
B LOCKING AND A NTI -P ARALLEL D IODES
Ensure that the chosen components are suitably rated for the particular
inductance and energy to be dissipated. The Peak Reverse Voltage ratings
should be a minimum of 2 times the Power Supply maximum output voltage.
The Continuous Forward Current ratings should be a minimum of 1.5 times
the power supply maximum output current. A heatsink may be required to
dissipate the power caused by flow of current.
Power
Supply
Sense (+)
Sense (-)
Out (+)
Out (-)
Battery
Application
Inductive Load
Application
OR
Freewheel
Diode
Figure 2-3. Diode Connection