How to make a Variable Frequency Drive (VFD) | 3: Software

In this video, I go over some interesting software topics regarding my VFD project.
Interrupt service routines, PWM signals and debounce filters.
Here's a link to the code used:
github.com/MatanPazi/VFD/blob...

[@qzorn4440]

Sweet video. 😎 Thanks.

[@victorgomes7094]

Awesome! Thanks for sharing!

[@softsubu]

Hi good morning. I modified code line number 372 : TIMSK1 = (1

[@matanpazi3777]

Hmm, strange Timer0 didn't work for you. Thanks for the update, glad it's working now!

[@t.e.celektronik5020]

I am try sir @softsubu why signal PWM not working in osciloscop

[@t.e.celektronik5020]

Help my sir @softsubu 🙏🙏🙏

[@nafizahmed4926]

Hi Matan, it's a nice presentation of your project. Have a request, could you please share your hardware schematic or any Garber files for reference?

[@hafsaamin9019]

Hi Matan. Great project, really. I just need to your help. Do you have vfd all pcb gerber files and all codes. Kindly let me know. I’m very thankful to you.

[@tomtankyou1282]

do you have any software thoughts on how to implement vector control on an induction motor? it seems similar to field oriented control but all the drives we buy in our plant are called vector drives. and they are supposed to calculate the vector of current in the rotor, and the current vector in the stator and improve RPM control at varying torque loads. It seems to account for the slip changes as loads get heavier or lighter. If we set a frequency on a simple scalar drive we see RPM dip when loads go up do to the motors slip.

[@matanpazi3777]

I haven't implemented FOC on an induction motor so not sure, it seems to be a bit more complicated than FOC control on a synchronous motor, since I assume you would be interested in the slip speed which isn't measured directly (The encoder measures the rotor speed and not the slip speed), though it can probably be estimated.. I haven't read it but this seems like an informative article from TI on the subject if you want to go over it: www.ti.com/lit/ml/sprabp8/sprabp8.pdf?ts=1679949249580&ref_url=https%253A%252F%252Fwww.google.com%252F

[@johnstilwell9462]

TI has a good video about this here: kzbin.info/www/bejne/lWeQkJ2sj8pqn6M

[@ergunozyurt20]

Hi Matan. Great project, really. I just need to reverse turning of motor. Can you suggest any resources or sample code about this? Thank you very much.

[@matanpazi3777]

Thanks! Not sure of any specific resource, but you could add a hardware switch which would determine FWD or BKWD drive by changing the sinewave order for example.

[@ingoschmied6811]

Hello Matan! Great project, and great videos! Thank you for posting the videos on KZbin, and for the repository on GitHub, but I am unable to find any way to contact you, and I am also unable to see what license your work is under. Is this project open source, BSD, GPL, MIT licence?

[@matanpazi3777]

Thanks Ingo! Fair point, just added an MIT license to the code.

[@ingoschmied6811]

@@matanpazi3777 Thank you very much, and keep up the excellent content!

[@polhpolh64]

Can you change the switching frequency in the code?

[@AbdulRazzaq-bo3ch]

Hello sir do you have vfd all pcb gerber files and all codes

[@konstantninosps1067]

Hello, could you upload some calculations or tell me where did you find Vrdson , Dz2 ? I would really appreciate it. Great job of your work.

[@matanpazi3777]

Thanks. I don't follow, what is "Vrdson , Dz2"?

[@konstantninosps1067]

@@matanpazi3777 I am watching the whole series . Vrdson is a value of AN4840 (page 24 . ) that you probably used to calculate Cbootstrap for IMP STGIPQ8C60 circuit . Dz2 is diode Zener connected on each IGBT in parallel.

[@matanpazi3777]

@@konstantninosps1067 I didn't calculate VRdsOn. I figured out what was the needed capacitor capacitance according to P. 25 in the same app. note you mentioned. The cap nominal voltage needs to be big enough to able to withstand Vcc (15[V] in my case). And then I chose a Zener diode to protect that capacitor, meaning a breakdown voltage lower than the capacitor's nominal voltage.

[@konstantninosps1067]

@@matanpazi3777 At P.25 you cant figure out Capacitance without having knowledge of ΔVcboot value. For example P.26 it says that needs Vcc = 16.9 V so that ΔVcboot = 0.1 ----> 2.2u< C

[@konstantninosps1067]

Thank you for your quick response, I appreciate it .

[@softsubu]

same error : redefinition of 'void __vector_16()' How can I fix it?

[@matanpazi3777]

See my comment in your previous comment.. Other than that, not sure, not getting this error.

[@nguyentri7726]

Could you please check your code. I can't compile code

[@matanpazi3777]

What's your compilation error?

[@pannelachandrakala4367]

sir could you please send me the gerber file

[@matanpazi3777]

It's quite dangerous. I'd rather only people who designed this themselves built it.. Good luck

[@heliojuniorandruchechen3932]

ola. este codigo esta com problema, nao compila.

[@matanpazi3777]

Look at the comments in lines 54, 55. I assume that's the reason for the error you're getting. I also just fixed a bug relating to the variable Desired_Freq, you can try compiling using the latest code.

[@heliojuniorandruchechen3932]

@@matanpazi3777 could you provide the schematic?

[@dsponline_0]

Where's the 4th video?

[@matanpazi3777]

Glad you enjoyed :)

[@mahershhab3824]

I need help for money

[@softsubu]

Compilation error: 'Desired_Freq' was not declared in this scope

[@matanpazi3777]

You can check out the latest code, I just fixed this bug (Desired_Freq was recently changed from a global to a local variable).

[@softsubu]

Compilation error: redefinition of 'void __vector_16()'

[@matanpazi3777]

Look at the comments in lines 54, 55. I assume that's the reason for the error you're getting.

[@teddyjamilonatefreire8797]

@@matanpazi3777 Hello Mr. I had the same error compilation. How can I fix it?

[@matanpazi3777]

Other than what I suggested above, not sure. Not getting that error.

[@ovidiucojocaru1061]

@matanpazi3777 Hi, Very nice content and explained 😊 I started to follow on EasyEda to view PCB design because i want to order and test your project but you don't have any project on public 😢