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Data type mismatch error in Simulink

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Siddhi Kadam
Siddhi Kadam el 14 de En. de 2022
Comentada: Pat Gipper el 20 de En. de 2022
I am running a simulation of Direct Torque Control of Induction Motor in Simulink. Howeve in sector formation I'm getting the following error:
Data type mismatch. 'Input Port 1' of 'DTC_Trial1/Hystersisis Control and Pulse Generation /Subsystem/Sum1' expects a signal of data type 'boolean'. However, it is driven by a signal of data type 'double'.
I'm not able to understand why this is happening. Any help would be appreciated. Attached file for reference. Thank you.

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Pat Gipper
Pat Gipper el 17 de En. de 2022
I saw a number of other issues in this model.
1) I think the inverter needs a ground reference added on the emitters of the lower corner IGBTs. Once you do this then you will be able to measure the stator voltages and currents with the Three-Phase V-I Measurement block as needed.
2) The subsystem calculating the sector needs further work. Try using a mod(2*pi) instead of the boolean logic, as I believe you desire to wrap the result. Also it is outputting a sector value of zero, which I think is incorrect. Try adding 1 to the result.
3) The Stator voltage selector using a fnc block that is not compatible with the psi_s input. Should this be an absolute value function?
  4 comentarios
Siddhi Kadam
Siddhi Kadam el 20 de En. de 2022
Yes sir it's working a lot better now. Though there is some noise in the stator currents, the entire system is working as it was desired and the locus is also obtained. Thank you for the help.
Pat Gipper
Pat Gipper el 20 de En. de 2022
I'm glad to hear it. Switching noise in the stator currents is to be expected with this control scheme.

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Más respuestas (1)

Fangjun Jiang
Fangjun Jiang el 14 de En. de 2022
  1. The easiest solution is to add a Data Type Conversion block.
  2. The proper solution is to set the proper data type at the relevant blocks.
  3. The related setting is the diagnostic for mismatch data types.





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