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  • Users: zolka
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  1. zolka

    850W motor's capacitor value

    Helo! Our 850W vacuum cleaner smoked, when my mother used it. She turned it off as soon as she noticed the smoke. When I took a look at the inside of the machine, it turned out that the capacitor caught fire. Now I am considering replacing the capacitor, the only problem is that the old one has...
  2. zolka

    Load question

    Helo! Is it possible to connect a 6 KW resistive (R) load to a 4 KW induction generator and still the IG will not demagnetize, only a huge voltage drop will occur at the IG terminals??? I thought, if the IG is overloaded then it will demagnetize! Regards, Zolka
  3. zolka

    RC load

    I have a very simple question! What is the output voltage of a series RC load? Suppose the Vin is AC! Here is the picture!(attached)
  4. zolka

    State space equation

    Helo! Can anyone tell me how to transform this equation into state-space equation? I managed at the motor, but here are the capacitors, which confuses me! The currents are the state variables! Thanx (The equation is...
  5. zolka

    Ind. gen. matrix expression

    Helo! I have found the next expression in the matrix which describes the induction generator: R1+L1p+1/Cp I assume p=d/dt, but how can I add numbers which has no common measuring unit??? R [Ohm], L [Henry], C[Farad] Please, help me out!
  6. zolka

    Mutual Inductance

    Helo! I assembled my Simulink model of the induction generator. Now, I want to test it, but whenever I find a generator with it’s parameters, the Mutual inductance is missing. For the motors it’s always given! What’s the difference here? In my model I have to know it. How can I compute it????
  7. zolka

    Initialization

    Helo! I am running a simulation, and I have to give variables the starting value, but only the starting value, as the simulation runs these values have to change at each new cycle.I know how to give a variable a certain value but that won't change during the simulation. Can anybody help?
  8. zolka

    Induction generator

    Helo! I’m working on an induction generator simulation. But I have a problem when it comes to the state-space equations. If I assume that the current and voltage are zero at the starting moment of the simulation, then the state-space equations will always give the result that voltage=0...
  9. zolka

    Lm versus magnetizing current!

    Helo everybody! I made a generalized AC motor model in matlab (simulink), I’ve run the simulation on different 3 phase motors (1kw 2.2kw ,7.5 kw, 22 kw) and the difference between the calculated and simulation results are 5-10% (Tpullup,Tpullout,Istart,Irated,Speed)!I figured out that the error...
  10. zolka

    Motor torque?

    Hi! Is it possible that the rated torque of a 3 phase AC motor is smaller than the starting torque? In my case: Tstart=13Nm Trated=20Nm Tpullout=33Nm
  11. zolka

    3 phase voltage

    Hi! Can anyone tell me how to generate 3 phase voltage in matlab with Simulink! I know it is not a big deal, and I have a solution, but it just won't work the way it should! Thanx !
  12. zolka

    Matlab Simulation of AC motor

    Helo everybody! I,m running a simulation of a 3 phase, squirrel-cage, wye-connected 7,5KW, 6 pole AC motor in MATLAB! The simulation results are the next (direct on line starting): 1. starting current 170A, then after a few seconds when the motor reaches the rated angular velocity of...
  13. zolka

    AC motor parameters

    Hi! Can anyone tell me how to measure the stator,rotor and mutual inductance of an AC motor? Or these parameters are given with its other specifications?? I am a rookie on this field! Thanx in advance!

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