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  1. jocamc

    Operations with voltages phases on simulink!

    Hi I've a circuit built on simulink in which I use a 3-phase PLL block to track the stator voltage phase of an asynchronous generator and then make some math operations (subtract by pi/2 rads and then subtract by the electrical rotor angular position like the second image bellow)to apply on a...
  2. jocamc

    Unexpected shutdown of matlab!

    Hi, I've a circuit on simulink which take more than a hour to simulate. Sometimes, during this simulations, my matlab just shutdown and I can't see any results. Do anyone know why this happens and how to prevent it?!
  3. jocamc

    Speed control of a DFIG

    help!
  4. jocamc

    Speed control of a DFIG

    Hi, I've a system built on simulink which includes an asynchronous machine working as a generator, feeded by a torque applied from a turbine (it's not a wind turbine/system). The system works ok when I use the asynchronous machine with a squirrel cage rotor (constant speed) but I want to...
  5. jocamc

    How to create a step with multiple final values in different instants?

    Nop!
  6. jocamc

    How to create a step with multiple final values in different instants?

    Hi, I need a block similar to the step to use on simulink but I need one, which gives me final values at different instants. For example: Initial value = 0 Final Value (at 100 seconds) = 1 Final Value (at 200 seconds) = 2 Final Value (at 300 seconds) = 3 How can I do this? Thanks in advance!
  7. jocamc

    How to plot the mean of a sinusoidal function

    Hmm what is the name of the block?
  8. jocamc

    How to plot the mean of a sinusoidal function

    Hi, Like the image below I want to use a block from simulink which allow me to plot the mean value (green line) of a sinusoidal function (blue line). I've tried the block "mean value (linear)" but it just gave me another sinusoidal function with less amplitude compared to the original. Can...
  9. jocamc

    Simulink - Warning algebric loop

    Hi, I've a circuit on simulink where I collect three phase currents and voltages from a measuremnt bus and then use them in blocks of abc-to-dq transformation. When I run the circuit for the first time I get the following message: This algebraic loop may be resolved when the subsystem...
  10. jocamc

    How to build in simulink an assynchronous generator driven by an assynchronous motor?

    Hi, I want built a system on simulink where I've an a assynchronous motor with squirrel cage rotor driving an a assynchronous generator to test if my the control system of the generator is working. So my system is something like the image bellow. My problem is that I dont know if the block...
  11. jocamc

    How to get the output of the abc-to-dq transformation isolated?!

    help?
  12. jocamc

    How to get the output of the abc-to-dq transformation isolated?!

    Hi, I've a circuit built on simulink which is presenting 2 errors like the ones on the images bellow. This two errors appears to be related with the dq signal of the block "abc-to-dq". Probably I cant use a Demux to work with this signal. Can someone tell me how can I get the isolated...
  13. jocamc

    Why use a buses when connecting a DFIG machine to a voltage source (grid)?

    Hi, I want to build in simulink a specific circuit that includes an asyncronous machine (DFIG) connected to the grid. I have saw some examples on the internet and in most of them, it's used buses like the one pointed by the red arrow in the image bellow. My question is, why use these buses...
  14. jocamc

    Performance curves on simulink

    I've found something on the internet wich I think is the block I need but I dont know really wich is:
  15. jocamc

    Performance curves on simulink

    Well I have two inputs. One of them, for now, is constant the other is a sinusoidal function. These two inputs combine in a specific formula which gives a value that I must then match in a performance curve. How do I build a block wich is a "performance curve"? Use some kind of array?
  16. jocamc

    Performance curves on simulink

    Hi, I want to use a performance curve of a turbine in a simulink diagram. Can anyone tell me if there is a block or a tool in simulink wich I can use to put this characteristic curve? Tks in advance!
  17. jocamc

    MATLAB - How to put a function with a series in a m file

    nop
  18. jocamc

    MATLAB - How to put a function with a series in a m file

    Hi, I want to write the following function in a m file but I really dont know ho to put the series in matlab language. Can someone help me to to put the following function on matlab? I want also that the step of the series to be 0.01 and not 1. I'll have to applie a laplace transform later...

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