Data type mismatch error in Simulink
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Siddhi Kadam
il 14 Gen 2022
Commentato: Pat Gipper
il 20 Gen 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
il 17 Gen 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?
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Pat Gipper
il 20 Gen 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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Fangjun Jiang
il 14 Gen 2022
- The easiest solution is to add a Data Type Conversion block.
- The proper solution is to set the proper data type at the relevant blocks.
- The related setting is the diagnostic for mismatch data types.
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