 |
|
|
|
|
|
|
Home
> Super Snubber Technology for inverter legs..!
|
Print
|
|
Super Snubber Technology for inverter legs..!
|
|
Allowing the use of very low Rds-on mosfets at 500/600V with their slow inherent diodes, our low loss super snubber gives you efficiency gains at any power level (up to 100kHz) for inverter stages and reduces EMC while adding only $4 (less in volume).
|
Another original concept from the Pwrtrnx lab, initially aimed at the grid tied solar inverter market, a small integrated magnetic component underpins our Super Snubber Technology - developed for power inverter legs where it is desirable to use 500/600V mosfets with a very low RDS-ON.
Many of these have unfavourably slow internal diodes leading to very high turn on losses (or making them just plain unuseable) if one is to avoid device failure.
Our Super Snubber Technology limits the reverse recovery currents to only a few amps (3A typ) whilst allowing a fast turn on of the opposing mosfet - reducing turn on losses to very low levels and allowing small RC snubbers to really clean up the switching wave forms. Thus FRED Fets and co pack IGBT's can be replaced with standard mosfets of a lower RDSon.
The controlled di/dt and smaller useable RC snubbers gives an effective removal of prime sources of RFI within the inverter.
As well as working on conventional two switch inverter legs, Super Snubber Technology has been proven on 3 level inverter topologies up to 50kVA (800V bus, 3 phase 400VAC mains 70A per phase) using FET's and IGBT's (plain or co-packaged with diode).
Super Snubber technology can be used in high power boosters to control the reverse current in a low forward drop 600V/1200V boost diode. In fact a controlled power mosfet can be used in place of the boost diode (up to 70kHz so far), giving much lower turn on losses in the main boost switch, lower boost "diode" losses and higher overall booster efficiency with lower RFI.
To initiate a discussion regarding licencing feel free to email us at: supersnubber@pwrtrnx.com
Updated June 19, 2009
|
|
|
|
