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Hello,
I'm having output which is controller by an SCR. If I'm able to detect that output current is rising fast then I can reduce the conduction angle of the SCR.
I wanted to know, what is the di/dt logic, so that it can be implemented digitally.
I'm having a full rectified current signal sensing using ADC in µC. A spike appears in that signal at a point.
I have attached an image which shows the behavior of the signal. I want to develop a logic to detect that current is rising before the spike appears in the image, so that I can avoid...
Sir, The output load frequency is varying from 250 Hz to 40 kHz and the switching frequency is 100 kHz. I tried LC filter with the cut off freq from 50 to 100 Hz, but the settling time increases.
I'm trying to reduce the output DC ripple of the converter and ensure the output has settled to...
Sorry I forgot to mention the application Sir. I was trying to built a power supply using flyback converter. I tried L-C filter but the Peak to Peak ripple was more than 30mV.
450 volt input dc and 65 volt, 12 A output is required.
What are issues of using buck converter rather than flyback converter ?
Does the inductor at the output of buck converter can create problem in output current control in DCM mode ?
Thanks treez and Warpspeed for your help.
Is a simple buck converter better to implement for a 1kW battery charging or a 2 mosfet flyback would be better ?
Is there any single dirver IC that can provide high side and low side drive for same output PWM's, that can be used for a two-switch flyback converter.
Thanx treez, Warpspeed Sir and jcuadra for your help.
Which mosfet driver is used for a two switch flyback?
I'm currently using a high side and low side mosfet drivers separately. The PWM is having noise as the drain voltage is increased, which makes the PWM to deteriorate.
I'm using an...
1) Please guide me on the flyback design calculation, especially for the transformer. The reference I'm using has been attached. In that from page number 16 the calculations are given.
For 500 kHz switching I'm planning to use RM 14 (N49 material- EPCOS).
Please share proper reference for...
Thanks Warpspeed and treez
If i increase my switching frequency to 500 kHz to reduce the primary inductance what problems I may face. Is it advisable to increase the PWM frequency above 100 kHz?
Are there problems related to availability of materials for 500 kHz or just an L-C filter at the...
Thanx treez , c_mitra and Warpspeed.
1) Can the 2 switch flyback be used upto 1kW ?
2) for operation of 2 switch flyback in discontinuous the inductance equation:
Lp= ((Np/NS)^2*(1-D)^2*R) / (2*f)
and
Vo = Vi*D*squareroot((efficiency*R)/(2*Lp*f))
with
D_max= (Vo/Vi) *...
Thanx Easy peasy, Warpspeed , treez for ur valuable response.
As I understand once a system (say flyback converter) is modeled to find the output to input ratio using Laplace transform, the system poles and zeros are obtained.
1) Then how come the system transfer function changes with its...
Ty Warpspeed and Easy peasy.
Yes I know that by the design given in post #48, the mosfet is selected having voltage much greater than twice the input voltage.
But if the input inductance of the primary is kept low, the converter operates in Discontinuous mode, where the current increases...
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