Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Are you suggesting that I use this for zero-crossing detector only or for the whole syncronization (voltage and phase) ?
This seems like a brand new product.
This is the said thesis (Mr.Cool from this forum mentioned it in another topic about grid-tied inverter.):
**broken link removed**
Look at page 52 for the "voltage sensor" but I do not see any more details on how the diff amp. is connected to the transformer. If you see it please share.
You...
Well it has an explanation. Here is the funny part:
I have not designed any control scheme or program.
My zero-crossing detector(s) only gives to the DSP the moment in time when the inverter must start it's 6 period cycle (by driving first set of 3 transistors)... or at least this is how I...
However if I use resistors at the input of a circuit that will measure both voltage and phase of the voltage the zero-cross detection capability of the circuit suffers because it will detect the zero-crossing point with a delay...
Having this in mind is it convenient to use one circuit for both...
Yes, I am using a DSP to control the inverter. I am going to connect the signal for the grid voltage to the ADC converter of the DSP.
I am not sure on how to condition the signal in order to put it in the ADC (from 220V to <3V) ?
I have to get signal for each of the three phases right ...
Hello.
I did not want to start a new thread so I decided to post in this one.
A grid-tied inverter must provide a voltage a little higher than the grid voltage. To achieve this the inverter must monitor the voltage in the grid. Could you suggest a circuit for monitoring the grid voltage?
Do...
Thank you very much. It is not a real thing that I am going to build but still:
I am wondering:
Let's say we are measuring the interphase voltages in a 0.4 kV utility.
The inverter controller works with signals <3V so in order to process the signal with the controller I need to use step-down...
Hello. I have the following question
In case of a three-phase inverter. Do I need to use three zero-crossing detectors for each phase or is it enough to use one and detect the zero-crossing of any phase (no matter which one) ?
And one more thing:
Ultimately - is a transformer based...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
