Powerful Knowledge 17 - Digital control in power electronics

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Күн бұрын

In our last episode of 'Powerful Knowledge', we discussed how to control power electronic systems using traditional analog techniques.
In this episode we show how a microcontroller can be used to implement digital control using real time embedded software. Since digital control uses algorithms implemented in software, the scope for adding extra capabilities is significantly enhanced.
If you like this content, please subscribe to our channel and see the rest of our 'Powerful Knowledge' series!
#stemeducation #powerelectronics #embeddedsoftware #netzero
- Update 21st February 2023. A viewer spotted an error (thanks!) in the video at the 23 minute point. With 10ns edge resolution, we have 100 discrete pulse widths with 1MHz PWM, not 1000!

Пікірлер: 15

@Tuong11a Жыл бұрын

Much appreciated your efforts as well as your generous to share tons of knowledge to us. Thank you very much!

@sowmyaakella9168 5 ай бұрын

Very useful presentation ! Can you elaborate on why the sample frequency being same as switching frequency helps reduce noise ?

@ElectronicmindsUK 5 ай бұрын

If you can synchronise the ADC sampling to the PWM (or an integer fraction of it) then it is possible to sometimes avoid ADC sampling during a switching transition. This can help to reduce noise. If you sample asynchronously then you can end up getting beat frequencies appearing in your sampled data.

@sagarmodi2040 7 ай бұрын

Excellent presentation. You are sharing the state of the art of designing the converters with your valuable experience. I really liked all the videos and already subscribed the channel. I have only one suggestions that MATLAB has capability to make the scope background white from black and also you can change the width and colors of the plots. This will help viewers to digest it more easily. Other than that it is 10/10 presentation.

@ElectronicmindsUK 7 ай бұрын

Thanks for this great feedback! It is really valuable to hear how we can improve our videos so thanks for taking the time to make these suggestions!

@damithDeAlwis Жыл бұрын

This is very good and helpful. Thank you very much for the time and effort. Could you please tell me what is the original platform/ website this webinar was conducted. Can you share the details. How do we get the next webinar link.

@ElectronicmindsUK Жыл бұрын

Hi Damith, the platform we used is called Livestorm (livestorm.co/ ) and is great for hosting realtime online webinars. This is just a recording directly from that platform. If you subscribe to our channel, you'll receive notification when we publish new videos. You should also be able to access all of our other power electronics webinars as they are stored as a playlist called 'Powerful Knowledge' on our channel. Have fun!

@damithDeAlwis Жыл бұрын

At the 23 minute, is it 1000 steps or 100 steps for 1Mhz PWM.

@ElectronicmindsUK Жыл бұрын

The clock on the PWM peripheral is 200MHz which gives a 10ns step size resolution. This will give 100 steps for 1MHz PWM frequency so sorry, that is a typo in the presentation. However, the TI Delfino processors support a great peripheral called 'High Resolution PWM' which reduces the step size to around 180ps (or about 5555 pulse widths for 1MHz PWM). We have been playing with this recently and the performance is fantastic.

@damithDeAlwis Жыл бұрын

@@ElectronicmindsUK thanks for the response. I have another concern though. In the voltage measurement explanation, we doesnt need to use an isolation op amp evertime. We can just use a differential amplifier configuration with very low gain. It works well and the cost is low. Also higher performance than isolation op amps.