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Hi. I want to select a capacitor for a full-bridge rectifier.
Load current: Max 20A.
Load voltage: Max 400V.
Line frequency: 85 kHz.
Application: Electric vehicle battery charging.
How can I calculate the capacitance value?
Many thanks.
What is your center frequency?
How about fixing center frequency in your setup? I think that CST will use the center frequency for meshing. Therefore, if you change it, the result will change a little bit.
For example, your frequency range is 100 - 300 MHz. The center frequency is 200MHz.
So...
The difference between an electric transformer and a Wireless power transfer system is the resonance.
Transformers utilize non-resonant inductive coupling while the other uses resonant inductive coupling.
Therefore, in circuit of a WPT system, it consists of Inductor and Capacitor for resonance...
Thank you every one. I almost understood about this coupled mode theory.
It is necessary to review circuit theory, complex number and differential equations carefully.
Thank you for your replies.
My wireless power transfer system uses magnetic coupling to transfer power. Normally, frequency is about 10 ~ 100 kHz for electric vehicles, and about 6.78 MHz for mobile devices like laptops.
To analyze this system, it is possible to use Equivalent circuit...
Hello, many papers used coupled mode theory for wireless power transfer design.
It looks interesting because we can know the energy exchange in the system.
But mostly, they don't explain in details about this theory. Is there any body know well about this theory? Can you give me some good...
Thank volker@muehlhaus very much.
The boundary conditions in CST is always PML. And in HFSS, I used Radiation Boundary.
I think that PML should be stable, right? So, why results in CST is not stable?
Many thanks
Thank volker@muehlhaus very much.
In CST, Results is unstale. But in HFSS, Results are very stable even when size of radiation boundary is small or large.
Do you have any idea about Meshing of CST and Settings to make results correct? Because using CST is much faster than HFSS in simulating...
Hi everyone.
I want to discuss about the impact of Radiation Box in CST simulation.
I have a system include 2 loops and a spiral coil (a Wireless Power Transfer, WPT System). My purpose is to calculate Resonant frequency of Spiral coils and S21(dB) in CST. Range of frequency = 1 MHz to 10 MHz...
Thanks FvM very much.
My monopole is a spiral monopole, and It's a small antenna but bandwidth is narrow. (5 MHz)
Do you have experience in this case: How to make it wideband?
Any paper suggested?
Many thanks
Hi. Now I am simulating a Wireless Power Transfer System with CST 2013.
Working frequency is 6.7 MHz (wavelength=50m). What module in CST should I use? MWS, EMS...???
The size of coil is 60cm. What is the size of air box should I select? Because when I simulated, size of air box impacted alot...
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