Questions tagged [llc-converter]
The llc-converter tag has no usage guidance.
17
questions
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LC-converter non sinosoidal currents and voltages
I simulated a LC-converter with a verly low static switching frequency of 300 Hz. I expected the current in C1 and L2 in a sinosoidal shape but instead it is almost a square wave. Also there is a ...
- 63
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0
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18
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ZVS loss calculation in SIMPLIS
Below is the Half-Bridge LLC Converter Example from SIMPLIS.
I would like to observe the loss from the low side MOSFET.
I want to compare the ZVS and Non-ZVS conditions.
I am curious about why the ...
- 357
3
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0
answers
70
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LLC Gain Curve by using SIMPLIS
Is it possible to use SIMPLIS to draw the gain curve of the LLC converter?
Because FHA analysis is not very accurate when the operating frequency is above the resonant frequency.
If it can, what kind ...
- 357
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30
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LCC Resonance Converter
I am trying to understand and design a LCC Converter
I read lots of documents about LLC and read "Design of efficient LCC based on ICL5102/HV combo controller IC" for LCC, I think I have a ...
- 11
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1
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99
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LLC ZVS deadtime calculation
According to the TI LLC document, I can use eq 32 to calculate the dead time to achieve the ZVS in the half-bridge LLC Converter.
below is my spec of half bridge of LLC converter.
the deadtime I ...
- 357
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1
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48
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Solving for Normalised Frequency with LLC Gain Equation
I would like help solving the equation below for Fn within matlab or Octave (preferably).
What I know is the following:
MG = 1.3
QE = 0.52
LN = 3.5
Because I am following this reference(https://www....
- 71
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1
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25
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LLC SMPS operation at low or no load -- can I just disable the gate drive?
I have made my own LLC converter using the UCC25600 controller chip. I can only operate the power supply at some Rmin and Rmax for the output load. Controlling the Rmin makes sense to me because you ...
4
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3
answers
345
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How does this LLC converter keep 50% duty cycle and zero DC offset with AC-coupled feedback?
I'm currently designing an LLC resonant DC/DC converter with 12V input, +/-15V output and nominal 200W combined output power. I've already got my resonant circuit, transformer, gain curves and power ...
- 14.4k
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1
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85
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How to measure the leakage inductance of LLC Split bobbin transformer with two auxiliary windings
Let’s say I am having ETD core and split bobbin for LLC Design
I have 4 windings in that transformer
primary
secondary
primary aux
secondary aux
I am winding the primary and primary aux windings in ...
1
vote
0
answers
26
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LLC initial current and voltage estimate from the equation
There is a paper called
Real Time Hardware-in-Loop Implementation of LLC Resonant Converter at Worst Operating Point Based on Time Domain Analysis
I am trying to derive equations 25 and 26 from this ...
- 47
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98
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LLC converter design step
I read the Infineon document about LLC converter design. On page 13, can anyone help to explain why this document uses this method to determine the maximum and minimum voltage gain?
Except for this ...
- 357
-2
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1
answer
523
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How can I calculate Litz wire strands?
How can I calculate Litz wire strands?
I am trying to calculate the Litz wire strands for a LLC ferrite transformer design.
IRMS = 2.4 A
J = 4 A/mm2
For these values:
A = 0.6 mm2
D = 0.9 mm
...
4
votes
2
answers
164
views
Synchronous rectification problems
I am currently designing a LLC resonant converter and am trying to perform synchronous rectification but am running into some issues with it.
This is my design and note I am currently using the ...
-1
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1
answer
38
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Use ESP8266 to power (HF165FD) relay
I am working on a project where I need to remotely switch the power for my dryer.
I am using a ESP8266 which outputs 3.3V to the LLC which switches the 5V relay to the dryer.
I am having problems ...
- 13
1
vote
1
answer
219
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LLC resonant capacitor RMS voltage and output capacitor ESR calculation [closed]
I have a question about the TI LLC document.
On page 25, Select the Resonant Capacitor, I don't understand why it can use this formula to calculate the RMS value. Could someone tell me how to get this ...
- 555
1
vote
1
answer
199
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Single-turn Secondary Winding on an SMPS Transformer
First of all, conceptually, this question is not a duplicate of this one or this one.
I'm designing a high-power LLC converter. For the transformer design, I've come up with a 16-to-1 turns ratio.
...
- 25.3k
1
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0
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215
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DCM and CCM Behaviour in LLC Converters
I've been refreshing my power electronics knowledge these days. During my re-visit to the LLC converters, I've come across this application note.
It also explains the behaviour of an LLC converter at ...
- 25.3k