The silent, reliable fanless power family expands with 500W and 750W with 150% peak, ideal for sealed enclosure applications.
High power single output units that pack a punch from a discrete and compact low profile 1U package.
These units are particularly useful for audible noise sensitive applications, outdoor applications or perhaps ATEX sealed enclosures where there is no fresh airflow and waste heat in that enclosure must be kept to a minimum. With a normal power supply, its waste heat is dissipated either in natural convection or by forced convection (fan) to the surrounding air, where here it can be dissipated through the base and out of the enclosure.
For more on our conduction cooled range click below
CONDUCTION COOLEDThe 150% peak the units offer is ideal for printer applications, motorised applications such as pumps and conveyors. The large capacitive load capabilities of these products lend themselves well to motor driving applications where there is no pre-charge circuit to the servo driver / stepper driver. The motor driver is essentially a clever DC-DC converter and uses a bulk capacitor as its energy storage to energise phases from as the motor turns. When first powered up (not even driving the motor) there is a large inrush of current to charge the bulk capacitors in the motor controller. Some motor controllers have pre-charge circuits that switch in a resistor to slew the charge rate of the bulk capacitor to prevent this large current draw on the source. Once the voltage across the bulk capacitor rises the resistor is switched out of the circuit and the capacitor completes its charge at a more manageable rate. If you have multiple motor drivers in your design their power up (not enabling) can be staggered to ease the load on the power supply. With these new units it is likely that this mitigation won’t be necessary. The overload functionality supports these types of applications by adopting a short term constant current output protection as opposed to immediately tripping and re-starting (hiccupping) like most power supplies.
The units offer common rail voltages from as low as 5V to 55V complete with output voltage adjustment, 5000M operation, and efficiencies up to 95%. A wide temperature of operation ideal for outdoor applications even in some of the most challenging environments, performing from -40°C up to 85°C. The units are designed to meet the household appliance standard EN60335 with high flame retardant components and the higher isolation requirements (defined by EN61558-2-16) and of course presume conformity to the Low Voltage Directive and Safety of Electrical Equipment Statutory Instrument and bare the CE and UKCA mark respectively.
Should you have an application that would favour the LMF500/750-23BxxUH please contact us for a sample to evaluate.