Variable Frequency Sine Wave Using MATLAB Simulink #26 | Basics | Paramjeet Singh Jamwal | INFO4EEE

[@santhoshKumar-nw2om]

fcn block is removed n matlab 2021. can you write the program in matlab function block for sin(2*pi*u(1)*u(2))

[@info4eee]

Thanks Mr. Santosh Kumar for the information about fcn block. Please find the program for sin(2*pi*u(1)*u(2)) as follow:
function y = fcn(f,t)
y = sin(2*pi*f*t);
end
This program will create two input terminals. In first terminal, you can use constant/ramp block to fed constant/varying frequency. In second terminal, you can use clock block to fed time.

[@rephah.o.m1760]

hi, can you explain how can we get sine wave with the frequency is varied from 1 to 20 Hz{ A frequency sweep with a
resolution of 0.05 Hz}?

[@info4eee]

Hello Rephah, you can use ramp block to generate ramp signal having "slope: 0.05" and "initial output: 1". Use this ramp block in place of step and two constant block to generate u(1) signal as frequency of sine wave.
Note: Detailed discussion about ramp block is already given in 16 video of this series.

[@rephah.o.m1760]

@@info4eee Thank you so much

[@xyilmaz3563]

hi, do you know how I can change the output frequency of a sine wave by using a lookup table in simulink? I really appreciate if you can answer me

[@info4eee]

Hello Yilmaz, Can you elaborate your requirement for better understanding?

[@harasharas2781]

Man, You are the best!

[@info4eee]

Thanks Haras Haras for your appreciating words. It means us a lot.

[@sirtufillaila9781]

Hello Sir. Thank you for your video. It helps me a lot. What if I want to make variable input freq and voltage. Can I use ramp block? Because I need to make sure v/f constant with changing voltage and frequency

[@info4eee]

Hello @sirtufillaila9781, Thanks for finding time to comment your kind feedback. Yes, you are right. You can use ramp block to variable input frequency and voltage by making v/f ratio constant.

[@rkimran5743]

Hello sir, I need a help from you.
I want to make a variable frequency control isolated dc-dc converter. I have to design a process block that will take response from PI controller and then gemerate PWM signal to provide variable switching frequency for three phase inverter. How to do that? How I can generate the PWM signal of variable frequrncy so that it always remain in between a minimum amd maximum frequency?
I would be grateful to you if you could help me. 😓

[@info4eee]

I hope 20th video of this playlist which was on relational operator block will be helpful to understand pulse width modulation in MATLAB Simulink.
Are you talking about dc-dc converter or three-phase inverter?

[@prathameshjayantbhole3442]

Can you guide us with matlab code for the same example?

[@mhmoudkhadija3839]

Hello Sir,
Thank you so much for this useful video!
Can we increase the values of the frequency in a linear manner or a logarithmic manner instead of selecting a specfing values (for example every 5 seconds like your video) ?

[@info4eee]

Thanks Mhmoud Khadija for your appreciating words.
Yes, we can increase the values of the frequency in a linear or logarithmic manner. For this, we need to use ramp or math function (log option) block instead of step block.

[@mhmoudkhadija3839]

@@info4eee Thank you so much sir!

[@anantaparajuli190]

thanks

[@info4eee]

Thanks Ananta Parajuli for your feedback. It means us a lot.

[@shriniwasraut1469]

thank u so much

[@info4eee]

Thanks a lot Shriniwas Raut for your appreciation.
It means us a lot.

[@info4eee]

Thanks a lot Shriniwas Raut for your appreciation.
It means us a lot.