Simulink space vector PWM simulation

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chen dunzhi
chen dunzhi am 29 Aug. 2015
Bearbeitet: chen dunzhi am 1 Sep. 2015
  • The model:
  • Here is what i intend to do.
  1. Generate three phase voltage
  2. Do a alpha beta transformation
  3. Do a Cartesian to Polar transformation
  4. Check the angle output
  5. Since the three phase vector rotates counter-clock wise, I am supposed to get sequence of angle moving from zero to 180 degrees and drops to -180（in no time!） and moves up and repeats itself.But result is that the angle sometimes reaches 172 degrees and turns around,not reaching 180 degrees.Waht is wrong? help!
  • Here is the result

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MUHAMMED FASIL
MUHAMMED FASIL am 31 Aug. 2015
Please resubmit ur valid mdl file or send me at tpfasil2007@gmail.com
  1 Kommentar
chen dunzhi
chen dunzhi am 1 Sep. 2015
Bearbeitet: chen dunzhi am 1 Sep. 2015
Thank you. The problem is solved.
The time step for simulation is not small enough, leading to insufficient accuracy.
And I changed the time step from 0.01 to 0.00002 and the result is just as expected.
Thank you again!

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MUHAMMED FASIL
MUHAMMED FASIL am 30 Aug. 2015
Try with abc-AlphaBeta simulink block. Or submit ur mdl file
  1 Kommentar
chen dunzhi
chen dunzhi am 31 Aug. 2015
Bearbeitet: chen dunzhi am 31 Aug. 2015
The mdl file is there named reference_generation.mdl And i checked with abc-AlphaBeta block the result is the same. Does it have anything to do with the solver that Simulink uses? Because there is a warning:

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