I have included Mosfet FCH067N65S3 into the simulation Model. I followed all the steps given in ONsemi document for including the symbol into the library by creating two different folders named ON inside sub & sym folder of lib of Ltspice.
But it is still showing can't open the library file for the Mosfet while trying to simulate the circuit
The symbol file (maybe called xxx.asy) gets dropped into the "sym" folder of ltspice.
The "sub" file , which has the software for the model, you can paste this into the schematic...and click it and make it a "control" text instead of text.
There's instructions in the course i sent you...in the "LTspice models" file
I made the simulation work with imported Mosfet & Diode Models. It is working fine now in open loop.
I am currently designing the feedback loop for closed loop control of LLC resonant converter. Generally EDF(Extended Describing Function) method is widely followed apart from simulation to design feedback loop.
It is very complex & theoretical to arrive at a closed loop form of relevant transfer functions for LLC using EDF method
Does anyone have practical experience in designing compensator by any other method???
Using network analyser on benchlevel testing may be one..
One needs to know all the parameters of the power ckt to design the closed Vout & I limit loops - it is far from a trivial exercise ... even the choice of opto coupler makes a difference ...
One needs to know all the parameters of the power ckt to design the closed Vout & I limit loops - it is far from a trivial exercise ... even the choice of opto coupler makes a difference ...
Sounds good, the AP300 by ridley engineering is good.
Also, you can supplement with transient response testing...but hold on...this is a battery charger...so there wont really be any transients...so you can go for a nice slow feedback loop. with plenty of phase margin.
Sounds good, the AP300 by ridley engineering is good.
Also, you can supplement with transient response testing...but hold on...this is a battery charger...so there wont really be any transients...so you can go for a nice slow feedback loop. with plenty of phase margin.
oK..Yes i can go with a very high phase margin.... I guess if the operating frequency is less than resonant frequency(In my case), there are 3 poles & 2 Zeros... The position of whose varies with frequency. How shuld i know the position of individual poles & zeros???
As i have to design the feedback loop (Both CC & CV)purely based on intuition.
Type-2 compensator should be ok or Should i go for Type-3(usually for voltage mode control).