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Professional power electronics design services to global clients.
Power stage and control modelling, proof of concept development, innovative solutions to power conversion problems. High efficiency, soft switching, EMC compliant intellectual property to licence to OEMs. Rectifiers, Inverters, converters and control.
3kW DC electronic load - industrial battery discharger - portable. 7.5 to 135 volts, 0-50 & 0-100 amps. Very low ripple.
7.5 to 135VDC input, constant current range to 50.2 amps, fan cooling powered from DC input (no mains power required) this simple electronic load provides a useful portable load box for many applications.
3kW DC electronic load - industrial battery discharger - portable.
7.5 to 135 volts, 0-50 & 0-100 amps. Very low ripple.
Charger power supplies - high reliability, long life (15years).
24VDC, 48VDC, 110VDC, 220VDC 10A to 50A 19" rack mount, shelf mount & wall mount, full alarms and set-ability, LCD display of volts and amps, auto boost, earth leakage - click on products for full detail...
Charger power supplies - high reliability, long life (15years).

  News  
February 5, 2010
Single stage UPF offline psu's for mass production - now up to 3.6kW off single phase mains.
February 1, 2010
Electric vehicle (EV) charger - 375V out, 6 amps unity power factor from 220AC supply - Lowest size & weight.
February 15, 2010
3 phase brushless DC motor control (& switched reluctance)

Wide input DC/DC converter 7.5-450VDC 100watt+
Developed for an in house application, these converters can be made for applications from a few watts up to hundreds of watts. Also providing an additional 12V (for example) aux supply for user control electronics.
NEW 3 wire, 3 phase input topologies...!
Front end unity power factor rectifiers and complete isolated output rectifiers now available from Preston with lowest parts count and simple control - for robust and reliable operation.
Convert Gerber files to protel 2.8
Altium / Protel is the de-facto standard for pcb layout. We offer a service to convert gerber files output by other software packages into protel 2.8 so that valuable pcb work can be continued in protel.
48V adapter 96% efficient, 250W.
Using our single stage technology OEMs' can now have high power factor and high efficiency and high reliability in an adapter format.
48V adapter 96% efficient, 250W.
Preston converter impresses Australian Ministry of Defence Preston converter impresses Australian Ministry of Defence
Military specified high power converter blocks:
AC/DC Adapter 12V 18A (24V 7.5A) 95% efficient!! 95-265VACin
For powering the next generation of light weight pc's and TFT monitors - our new compact adapter technology breaks new ground in, size, weight and efficiency!
AC/DC Adapter 12V 18A (24V 7.5A) 95% efficient!!  95-265VACin
GET RID of that input mains BRIDGE RECTIFIER !!! GET RID of that input mains BRIDGE RECTIFIER !!!
Using either the two FET - two diode booster for UPF front ends, OR, by modifying your existing converter to remove the bridge rectifier and save watts on a power supply design! (a 500W psu at 90Vac will save 10watts with an input bridge-less design)
MIL STD 461E no problem for Preston engineers
24dBuV per metre measured @ 1m. We cure power supply emissions for a military blood fridge. Conducted emissions down to 10kHz as well
MIL STD 461E no problem for Preston engineers
Demand for EMC review of designs growing.
Demand for EMC review of designs growing.
More and more design groups are asking themselves - why wait for the prototype to fail EMC before calling on experienced input from the people who have done it for years...
High Power DC-DC Converters Up to 6kVDC i/p & 25kW o/p, fully isolated.
Preston designs and manufactures to order specialised high power DC-DC Converters, high efficiency & low RFI, custom shapes (e.g. cylindrical) high speed control loops for quickly fluctuating loads, proven reliability.
High Power DC-DC Converters
Up to 6kVDC i/p & 25kW o/p, fully isolated.
Is your control ckt causing increased RFI? Is your control ckt causing increased RFI?
Non optimal firing of power transistors, instability & susceptibility of a control ckt can result in your power ckt making more RFI than it really has to...

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