treez
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Yesterday, 06:44Thanks, from the Bode plot etc, the inductor is being pretty well shorted out, so i believe we will need to get rid of the 0.3R parallel resistor...6 replies | 180 view(s) -
18th February 2020, 22:03Hi, In the Vicor DCM3623 DCDC module datasheet (below) , page 21, there is, at Figure 23, an LC input filter to some DCM3623 modules in parallel....6 replies | 180 view(s)
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18th February 2020, 21:32treez replied to a thread Designing Inductor for designing of buck boost converter of 50W in Power ElectronicsBriefly..pick a ferrite core (eg ETD, PM, POT core, etc etc)....see eg ferroxcube or TDK data books of cores. Then you will wind it with enammelled...2 replies | 160 view(s)
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17th February 2020, 09:05(i'll say nothing, i got my brains smashed up once when asked to design Cuk's single stage isolated PFC'd Cuk converter for an EV charger at...23 replies | 748 view(s)
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16th February 2020, 21:51That's a great link...see Dr Slobodan Cuk of Tesla is talking air gaps there.23 replies | 748 view(s)
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16th February 2020, 13:59here i attach ltspice with LPRI = 1mH...just for sake of argument...and to keep it in DCM......i had to reduce the fsw to 16khz......and adjust LSEC...23 replies | 748 view(s)
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16th February 2020, 13:49Well...i made it just on the border of DCM/CCM at 270VDC with 226uH = LPRI and FSW=100khz......which is a good situation. If you increase LPRI,...23 replies | 748 view(s)
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16th February 2020, 13:19treez started a thread Where to buy Electronics components in UK for domestic use? in Miscellaneous EngineeringHi, I am in UK. I have now bought two DAB radios (from supermarkets) and neither of them work on the switch mode mains adapter that they were...2 replies | 297 view(s)
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16th February 2020, 11:25I attach here the new transformer in the ltspice schem for DCM at 230VAC...in fact, its DCM down to 270vdc input on the HV bus, so you have some...23 replies | 748 view(s)
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16th February 2020, 11:06if you dont have airgap in flyback txfmr then it will saturate immediately because when you power up it is on full load charging up the output...23 replies | 748 view(s)
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15th February 2020, 19:54Give me a shout if you want me to re-do your transformer for DCM over all VAC input? Please also tell what is your VAC input range?23 replies | 748 view(s)
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15th February 2020, 15:36Do you want to know about.... 1...Operation of active clamp flyback? 2...current mode control in flyback? 3....A sinusoidal inverter using a full...1 replies | 162 view(s)
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15th February 2020, 15:31did you look at it with thermal camera?...see if anything getting hot...there is a good therm cam you can buy for £150...ask me and i will tell you...5 replies | 291 view(s)
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15th February 2020, 12:36Hi I did your flyback in LTSPICE. It is attached for you….This is the free sim from analog.com…..you can run it by simply converting it to .asc...23 replies | 748 view(s)
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15th February 2020, 10:52treez replied to a thread The "cheap, quick and easy" way to do high power SMPS's? in Power ElectronicsThanks, The principle of the top post…..can it equivalently be done with two vicor DCM modules in parallel?....but this time with an error...9 replies | 389 view(s)
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14th February 2020, 08:43treez replied to a thread The "cheap, quick and easy" way to do high power SMPS's? in Power ElectronicsThanks, I admit that one controller is better…..(eg one error amplifier for multiple units etc etc)……though in some ways I like the idea of a totally...9 replies | 389 view(s)
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13th February 2020, 22:11treez started a thread The "cheap, quick and easy" way to do high power SMPS's? in Power ElectronicsHi, Is this the “cheap, quick and easy way” to do high power SMPS’s? The attached shows two identical Two Transistor forward converters in...9 replies | 389 view(s)
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13th February 2020, 21:34treez started a thread Heatsinking for Vicor DCDC modules on a test PCB? in PCB Routing Schematic Layout software and SimulationHi, We are doing a Test PCB containing one Vicor BCM4414xH0E5035yzz module, which will feed 4 paralleled Vicor DCM3623x50M53C2yzz modules....1 replies | 300 view(s)
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12th February 2020, 09:12...on the theme.......we could have eight identical paralleled 1.5Kw two transistor forwards……..and put a current limiter on the output of each...23 replies | 970 view(s)
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12th February 2020, 08:40sorry here is the link to the smps course with the section on pfc... https://drive.google.com/open?id=0B7aRNbu3Fes4TU92Mkw3YlA3ams ...it shows...13 replies | 594 view(s)
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11th February 2020, 22:05treez replied to a thread Intrerleave wind transformer on Phase Shift Full Bridge converter? in Power ElectronicsThanks, i thought proximity losses were worse when there were say, multiple layers of windings on top of each other.6 replies | 432 view(s)
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11th February 2020, 21:56Sorry but you are fixated on “DCM is needed for PFC”…in real terms you can get adequate pfc IN bcm, or ccm, or a combo of dcm and ccm…..take an...13 replies | 594 view(s)
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11th February 2020, 21:43Hi Unfortunately there’s no chance of splitting up the power supplies, ie one per drone motor…so its one single big power supply. That’s what’s...23 replies | 970 view(s)
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11th February 2020, 09:04treez replied to a thread Silicon carbide FETs best for Phase shift full bridge? in Power ElectronicsThanks, thats what i was fearing....and gauranteeing ZVS over all load range, and all transients, is going to be tricky.6 replies | 382 view(s)
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11th February 2020, 08:59Its a power supply for a 12kW drone. If a primary switch fails, (ie the high side one in the buck(s)) then the drone emergency lands on its...23 replies | 970 view(s)
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11th February 2020, 07:28Height isnt a problem no. I dont know why Vicor, but partly because their guys like vicor and they used it on a much lower power drone. Also,...23 replies | 970 view(s)
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11th February 2020, 06:53The cable length is 320metres Thanks, i'll recheck this, it was told that it would be one motor, but i cant see how that works....it would then...23 replies | 970 view(s)
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10th February 2020, 21:42Thanks, A contractor has now given us a Block diagram for a power supply for a single_motor_drone power supply using vicor modules…… Its 50V...23 replies | 970 view(s)
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10th February 2020, 08:23Hi, We all know how wonderful the PSFB is at running bags of current through the FET diode just prior to switch ON in order to give us nice...6 replies | 382 view(s)
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10th February 2020, 05:45Thanks, but i'm surprised not to hear more support for actully measuring ROUT?....( method as in #7)23 replies | 970 view(s)
About treez
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- April 5, 1982 (37)
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