The following two blocks cannot be connected in series: Block 1: 'A_stator: Asynchronous Machine SI Units' Block 2: 'Series RLC Branch2

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MANSOOR SOOMRO
MANSOOR SOOMRO 2020-7-22
回答： Adil 2025-4-23
The following two blocks cannot be connected in series:
Block 1: 'A_stator: Asynchronous Machine SI Units'
Block 2: 'Series RLC Branch2'
The first block, modeled as a current source, cannot be connected in series with the inductive element of the second block. Add a high-value resistance in parallel with one of the two block. You can also specify high-value resistive snubbers if the blocks have a snubber device.You can avoid the use of the snubber by selecting the 'Continuous' simulation type in the Solver tab of the Powergui and deselecting the 'Disable ideal switching' option in the Preferences tab of Powergui block.
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Vu
Vu 2025-4-2
The following two blocks cannot be connected in series because they are modeled as current sources: Block 1: A_stator: Asynchronous Machine SI Units1 Block 2: B_stator: Asynchronous Machine SI Units1 Add a high-value resistance in parallel with one of the two block. You can also specify high-value resistive snubbers if the blocks have a snubber device.You can avoid the use of the snubber by selecting the 'Continuous' simulation type in the Solver tab of the Powergui and deselecting the 'Disable ideal switching' option in the Preferences tab of Powergui block.

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Joel Van Sickel
Joel Van Sickel 2022-9-9
This is a common issue when using specialized power systems. Inductors are modelled as current sources and cannot be in series without an alternative path. The easiest way to do this is to follow the snubber recommendations which means insert a high value resistance between the two blocks, and connect it to ground. You can start with something like a megaohm. This can slow down the simulation. Smaller resistor values will simulate faster but decrease accuracy of the model. Another approach is to use simscape core technology which are the blue components which allow for inductors be in series with each other.
Regards,
Joel
Adil
Adil 2025-4-23
for connecting 3 phase source to 3 phase motor, in the settings of 3 phase source uncheck "internal impedances" to grey it out. that will solve the problem (for future readers). Also make sure the voltages and frequencies of the source and pre-set induction motor (i used a pre-set squirrel cage with 50 Hz, 400V and 1480 rpm)

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