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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.
High power starter kit for engineers & universites...
We are now selling fully working demonstration power converters up to 2.5kW AC/DC for power engineers to get to grips with H bridge converter circuits...
High power starter kit for engineers & universites...
AC/DC Adapter 12V 18A 90.5% efficient!! 90-275VACin
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 90.5% efficient!!  90-275VACin

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April 18, 2001
Single stage UPF offline psu's for mass production - now up to 2.5kW off single phase mains.
September 28, 2003
Electric vehicle (EV) charger - 375V out, 6 amps unity power factor from 220AC supply - Lowest size & weight.
August 4, 2003
Preston converter impresses Australian Ministry of Defence

High Power DC-DC Converters
Up to 3.6kVDC i/p & 25kW o/p
Typ 350VDC, isolated.
High Power DC-DC Converters Up to 3.6kVDC i/p & 25kW o/p Typ 350VDC, 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.
GET RID of that BRIDGE RECTIFIER !!!
GET RID of that BRIDGE RECTIFIER !!!
WE have the two FET - two diode booster for UPF front ends that does away with the diode bridge!!!
MIL STD 461E no problem for Preston engineers
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
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...
Demand for EMC review of designs growing.
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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