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17 Threads found on Phase Shift Full Bridge
Hello, We need to do a 700W offline converter. We are decidning between phase shift full bridge and plain full bridge. It appears that the phase shift version needs no additional hardware and gives zero switch-on switching losses. So my question (...)
Dear Members, I need to know about PWM controller IC with phase shifted full bridge conveter Controller. UC3875. My application where input variable 24to 45 and output 28V with high current. Does this controller have problem when input have more input that the output? will not work proper? Does it apply for the (...)
two: 1.series resonant half bridge 2.and phase shift full bridge
Hi... Has anyone has worked on TAB full bridge DC DC converter where power can be transferred from one port to another port by changing the phase shift of the square wave pulse to the switches of the bridge. I did a simulation but I obtained that power is transferred even when gate pulse sent to all the (...)
If you are trying to simulate ZVS, your timing is incorrect. You are switching on diagonal MOSFETs M2-M3 simultaneously as in conventional hard switched convertors. For ZVS, MOSFETs M3-M4 should be phase-shifted with respect to M1-M2. For example, for M3 change to TD=2us, for M4 change to TD=6us, should get you ZVS with phase (...)
I need to convert a DC voltage of 120Volts (can be less but not more) to feed the bus of a 3 phase motor controller. I'm by-passing the input rectifier, as I am source power from a battery stack. I have on hand some step up transformers 1:17 that I was planning on using . I am curious if I should take the time to achi
The carrier frequency of the PWM in a class-D amplifier has only one frequency. PWM changes its duty-cycle not its frequency. Then the signal inversion can be done with a 180 degree phase shift which produces a delay.
Hi, I would like to simulate fullbridge DC DC converter with the following parameters in LT spice with 95% efficiency. Here Iam doing synchronous rectification on the secondary side the delay between SA,SB and SC,SD is 50ns and overlap between M5&M6 is 100ns with dutycycle of 45%. but Iam getting efficiency around 85% (Pi=1887&Po=1608) but Iam ai
it is like to full bridge phase shift soft switchmode power supply. Pls ref to this type smps topology.
I am going to design a full bridge converter for EV drive. Power:4kw S/W frq: 100kHz S/W device: Power MosFET Input: 96V Out: 200V Load: Conventional DC motor Soft switching method: phase shifted converter or Resonant converter? Which mewthod is better? What are the pros and cons of these two methods?
Hi, In the TI application note - 'Designing a phase shifted ZVT Power Converter' page3-6, it is mentioned that 'During the left leg transition, this situation reverses and the winding initially conducting full current decays to zero. The secondary which initially had zero current will conduct the full output current at (...)
you could use a differential probe that allows direct, earth free measurement on power lines. the question is in what you are interested. Because you mention exessive phase shift you are probably interested in the zero crossing point of the mains voltage. This can be measured with a opto coupler. If your transformer is very small (<5VA) the
Hi The UCC3895 from TI implements a phase-shift controller for full bridge applications. The model includes various effects such as the adjustable dead-time but also the adaptative control. But ICAP8.1.6 can not open this model file.Please help to convert this higher version to ver8.1.6. thanks ynhe
1)How to design a high power DC/DC converter for EV accepting 4 quadrant control. Input: 48 (4 cells) to 96V (8 cells) Out: 200V Power: 1KW to 4 KW (inital try is 1kW then boost to 4kW) 2)Also, I use Power Mosfet or IGBT is better in my converter? 3)S/W freq is 100kHz is ok? My proposed design is "phase shifted H-bridge series-resonant (...)
Thanks to all. I propose to use ZVS phase shift converter. Sorry to say, is it UCC 3895? or UC3875? since I don't know UC3895 is it really difficult to obtain the good result by using 100khz ? Can anyone help me to design the high frequency transformer? any website is good? What is the difference between mosfet and power mosfet? What should
Hi, I am in HK. I am going to desgin a transformer for full bridge phase shift DCDC converter. The input range is 48-96v,out:200V. fs=100khz. In HK, I can find a good core. The biggest is ETD59 (3c90) from farnell. Is it enough to make a 1kw? or i\If i want to make 2kw, which material available in HK is good? E core: (...)
the mains psu appears to be using a phase shift bridge so there are no switching losses on the mosfets - it appears not to be a parallel resonant converter - rather standard phase shift - Regards Orson Cart.