DC to DC Power Supplies
DC to
DC Power Supplies (often referred to as a DC/DC
Converter) are devices which convert one DC voltage
into another DC voltage at a defined power level. In
many applications particularly where battery backup
is required, DC is used to facilitate bumpless transfer
to battery power should the mains power fail. The battery
pack is sized to suit the level of backup required dependant
on the Autonomy and the current required by the load.
The voltage of the battery pack may or may not be compatible
with the devices needing to be powered so DC to DC Power
Supplies (or DC/DC Converter) will be used to convert
the voltage to that required by the load.
DC to DC Power Supplies are used for a variety of different
applications which include:-
 1.
Where conversion is required from one dc voltage to
another. e.g. a distributed DC power bus may run from
108Vdc batteries to give a high degree of backup, but
the equipment to be installed for monitoring or controlling
processes runs on 24Vdc. In this case DC to DC power
supplies are used to change the voltage from 108Vdc
down to 24Vdc.
2. Where batteries are used to power equipment which
cannot cope with the voltage fluctuations caused by
the state of charge or discharge of the battery . In
this case DC to DC power supplies are used to stabilise
the battery supply, so whilst a 24Vdc battery might
fluctuate by as much as ± 20%, the DC/DC converter
will cope with a ±30% swing at its input and
provide a stable output to within a fraction of 1%
3. On vehicle applications DC to DC Power Supplies
will be used to protect electronic devices from transients
caused by engine starting, particularly where the DC/DC
Converter is a galvanically isolated type.
4. Where renewable energy sources such as fuel cells
provide an output where the voltage fluctuates dependant
upon the size of the load, DC to DC Power Supplies can
be used to stabilise the energy source output by absorbing
the voltage fluctuations.
5. Where large cables carrying significant currents
over long distances are used in installations, volt
drop along the cable length can often be a problem.
In these applications DC to DC Power Supplies can be
used to restore the voltage to it's nominal value
Simplypowersupplies.com are specialists in DC Power
Conversion. In addition to our own UK manufactured products,
we also supply products made in Germany, and the Far
East where necessary. We have many standard DC to DC
Power Supplies but in addition to these we can also
provide DC/DC Converters with special output voltages,
or configure systems which consist of multiple units
connected in parallel to give higher power (up to 250kW),
or we can provide rack based products with hot swap
facility to give n+1 redundancy for critical applications.
Our DC/DC Converters cover 5Vdc, 12Vdc, 24Vdc, 48Vdc,
60Vdc, 72Vdc, 96Vdc, 108Vdc, 110Vdc, 125Vdc, 216Vdc,
220Vdc, and 250Vdc nominal voltages, so simply ask if
you can't find what you are looking fro on our website.
For the rail industry we also provide units with Deutsche
Bahn approval and complying with European rail standards
such as EN50155 and ENV50121.
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