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problem with permanent magnet synchronous generator

problem with permanent magnet synchronous generator

problem with permanent magnet synchronous generator

Hi everybody!
I'm new with software Matlab Simulink and I tried to simulate a simple application of wind turbine with direct drive permanent magnet synchronous generator that, by a rectifier of diodes, gives power to a direct current generator.
Before use wind turbine I've tried to impress a constant angular speed in input to the generator so I could measured the electromagnetic torque. The result was that the medium direct tension of the current generator was correct. After this I change the input of the generator to a constant torque similar to that I measured. But in this case the generator doesn't works and if I try to increase a little the torque the dc tension,like angular speed, continuously increases.
I'm use powergui in continuous solver and the Dc current generator has is a 5A current generator.
The inertia of PMSG is set to 0.235kgm^2 and it has 10 pole pairs.
Thank you so much to anybody who can help me!

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