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operate at low voltages while handling large currents and
supporting high speed operation. This is realized by positioning
converters in close proximity to load devices and hence a
technique known as Distributed Power Architecture (DPA). TDKLambda offers a broad line up in this area. The products suitable
for DPA system include front-end power supplies, bus converters
and Point of Load (POL).
The features of DPA: It supports more compact and more efficient
systems, lower operation voltages, higher currents, higher
response speed of semiconductor devices and Digital control. An
example of DPA system is shown in the picture below:
Front end power converters are that convert AC Source or a DC
source which can be of low voltage or high voltage to core
required DC voltage. Bus converters are isolated converters that
converts the core voltage to the intermediate voltage required by
subsequent stage POL (Point of load). POL is a High efficiency, fast
response dc-dc converter that is placed close to the load and
converts the intermediate voltage into the voltage required by
semiconductor devices.
Some of the interesting applications of TDK-Lambda Power
supplies
A) Sonar Application
Sonar systems installed on surface ships, sonar is also fitted
extensively on submarines and other submersible vessels.
Navigation underwater is usually calculated using the vessel’s
distance travelled and direction, but this does not identify the
position of other submarines or the existence of a drilling rig. As
radar cannot be used below the surface, sonar is the
alternative.TDK-Lambda’s compact Z+ programmable power
supplies are now being used in sonar systems on submersibles
due to their proven reliability
B) Process control
TDK-Lambda HWS series / DRF series is widely used in distribution
control system as these offers relay contact and Class1 Div2
certification especially to be used in harsh environment. Optional
conformal coated PCB available to use in harsh/humid
environment
C) Automotive Instrument cluster test Jig
Automotive Instrument Clusters undergo a demanding test
regime to ensure high reliability. A manufacturer that assembles
and tests these units is now using the TDK-Lambda Z+
programmable DC power supply on its test rig
D) UHF/VHF Radio
Baseplate cooled PFE500SA AC-DC power modules are used in a
number of deployable equipment applications around the world.
The need for rugged and dependable operation is paramount. A
manufacturer of UHF/VHF radios designed in the 28V version of
the PFE500SA for their integral power source, because of proven
field reliability and technical support.
E) LED Video Display
Advertising has been radically changed with the extensive use of
eye catching LED video displays. These signs are often positioned
outside and the reliability of power
supplies is one essential factor for
manufacturers. TDK-Lambda’s
converters are used in high profile
displays because of their
specification, and the availability of
printed circuit board coating to avoid
failures due to condensation or
humidity.
F)Renewable Energy – Micro Grid
The 2500W ,EZA2500-32048,
bidirectional DC-DC converter is ideal
for solar or wind powered energy
storage systems. This power supply
can automatically, and continuously,
change conversion direction from
“grid side” 320Vdc nominal to
“battery side” 48Vdc nominal. The
EZA2500 is also designed to be used
for energy recovery; recycling
previously wasted power from
battery testers, robots, cranes,
elevators and autonomous ground
vehicles. When a 300 to 380 high voltage dc source is available,
for example from solar panels during daytime, the converter can
be programmed to charge 48Vdc rechargeable lithium-ion battery
banks. At night the stored energy can then be converted back to
high voltage dc to power either DC-AC inverters or dc-input
electrical/electronic devices.
www.tdk-lambda.com
ELE Times | 30 | November, 2016