This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

110 V CTE transformer but Switch Mode Power Supply

Former Community Member
Former Community Member
Is it a contradiction to get a 110 V CTE "tool transformer" that is SMPS?


I ask, as I could really do with a very light (as in kg) one of say 1500 W tool rated, probably only 750 W continuous rating.


Regards


BOD
Parents
  • you wont get 50Hz directly out of an SMPS - the whole point is the transformer is a tenth of the linear dimensions times  by dint of switching at 50 KHz or so ....

    IF the load can tolerate a fairly rough waveform, you may manage an SMPS, rectifying to 130 VDC or so, and then a commutation circuit to make a 50 Hz out of square wave pieces, much as a VFD does.


    The light weight car battery to mains inverters do this sort of thing -  there is no 50Hz transformer in side,  rather the high voltage is generated supersonic frequency and rectified, and then the DC is sliced and diced to fake a  'not very' sinewave.

    I suspect what you want is not available as a single item. You may be able to do some cunning with a 110V inverter (though it is likely to be 60Hz) and a lightweight 13V DC supply.


    Earthing the centre would have to be via a pair of caps or similar unless the DC centre voltage of the inverter was available..

    I suspect it would be quite fun to to do as a project, but I don't think anyone has, and meeting all the other relevant standards to do it properly makes it uneconomic.
Reply
  • you wont get 50Hz directly out of an SMPS - the whole point is the transformer is a tenth of the linear dimensions times  by dint of switching at 50 KHz or so ....

    IF the load can tolerate a fairly rough waveform, you may manage an SMPS, rectifying to 130 VDC or so, and then a commutation circuit to make a 50 Hz out of square wave pieces, much as a VFD does.


    The light weight car battery to mains inverters do this sort of thing -  there is no 50Hz transformer in side,  rather the high voltage is generated supersonic frequency and rectified, and then the DC is sliced and diced to fake a  'not very' sinewave.

    I suspect what you want is not available as a single item. You may be able to do some cunning with a 110V inverter (though it is likely to be 60Hz) and a lightweight 13V DC supply.


    Earthing the centre would have to be via a pair of caps or similar unless the DC centre voltage of the inverter was available..

    I suspect it would be quite fun to to do as a project, but I don't think anyone has, and meeting all the other relevant standards to do it properly makes it uneconomic.
Children
No Data